diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-28 12:06:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-28 12:06:45 -0800 |
| commit | cd278456d4ca0e6b3d5e10ace4566524baa144eb (patch) | |
| tree | a5e64b03b5575c6539dd9b39baa8dcf8f10d422f /arch/csky | |
| parent | 7d19ea5e99731f5346b047003bbe65117a86d12d (diff) | |
| parent | 6607aa6f6b68fc9b5955755f1b1be125cf2a9d03 (diff) | |
| download | lwn-cd278456d4ca0e6b3d5e10ace4566524baa144eb.tar.gz lwn-cd278456d4ca0e6b3d5e10ace4566524baa144eb.zip | |
Merge tag 'csky-for-linus-5.12-rc1' of git://github.com/c-sky/csky-linux
Pull arch/csky updates from Guo Ren:
"Features:
- add new memory layout 2.5G(user):1.5G(kernel)
- add kmemleak support
- reconstruct VDSO framework: add VDSO with GENERIC_GETTIMEOFDAY,
GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO
- add faulthandler_disabled() check
- support (fix) swapon
- add (fix) _PAGE_ACCESSED for default pgprot
- abort uaccess retries upon fatal signal (from arm)
Fixes and optimizations:
- fix perf probe failure
- fix show_regs doesn't contain regs->usp
- remove custom asm/atomic.h implementation
- fix barrier design
- fix futex SMP implementation
- fix asm/cmpxchg.h with correct ordering barrier
- cleanup asm/spinlock.h
- fix PTE global for 2.5:1.5 virtual memory
- remove prologue of page fault handler in entry.S
- fix TLB maintenance synchronization problem
- add show_tlb for CPU_CK860 debug
- fix FAULT_FLAG_XXX param for handle_mm_fault
- fix update_mmu_cache called with user io mapping
- fix do_page_fault parent irq status
- fix a size determination in gpr_get()
- pgtable.h: Coding convention
- kprobe: Fix code in simulate without 'long'
- fix pfn_valid error with wrong max_mapnr
- use free_initmem_default() in free_initmem()
- fix compile error"
* tag 'csky-for-linus-5.12-rc1' of git://github.com/c-sky/csky-linux: (30 commits)
csky: Fixup compile error
csky: use free_initmem_default() in free_initmem()
csky: Fixup pfn_valid error with wrong max_mapnr
csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO
csky: kprobe: Fixup code in simulate without 'long'
csky: Fixup swapon
csky: pgtable.h: Coding convention
csky: Fixup _PAGE_ACCESSED for default pgprot
csky: remove unused including <linux/version.h>
csky: Fix a size determination in gpr_get()
csky: Reconstruct VDSO framework
csky: mm: abort uaccess retries upon fatal signal
csky: Sync riscv mm/fault.c for easy maintenance
csky: Fixup do_page_fault parent irq status
csky: Add faulthandler_disabled() check
csky: Fixup update_mmu_cache called with user io mapping
csky: Fixup FAULT_FLAG_XXX param for handle_mm_fault
csky: Add show_tlb for CPU_CK860 debug
csky: Fix TLB maintenance synchronization problem
csky: Add kmemleak support
...
Diffstat (limited to 'arch/csky')
93 files changed, 1346 insertions, 992 deletions
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 89dd2fcf38fa..34e91224adc3 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -7,7 +7,7 @@ config CSKY select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_USE_BUILTIN_BSWAP - select ARCH_USE_QUEUED_RWLOCKS if NR_CPUS>2 + select ARCH_USE_QUEUED_RWLOCKS select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT select COMMON_CLK @@ -35,6 +35,9 @@ config CSKY select GENERIC_IRQ_MULTI_HANDLER select GENERIC_SCHED_CLOCK select GENERIC_SMP_IDLE_THREAD + select GENERIC_TIME_VSYSCALL + select GENERIC_VDSO_32 + select GENERIC_GETTIMEOFDAY select GX6605S_TIMER if CPU_CK610 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_AUDITSYSCALL @@ -43,11 +46,14 @@ config CSKY select HAVE_CONTEXT_TRACKING select HAVE_VIRT_CPU_ACCOUNTING_GEN select HAVE_DEBUG_BUGVERBOSE + select HAVE_DEBUG_KMEMLEAK select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS + select HAVE_GENERIC_VDSO select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_ERROR_INJECTION + select HAVE_FUTEX_CMPXCHG if FUTEX && SMP select HAVE_FTRACE_MCOUNT_RECORD select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO @@ -192,6 +198,22 @@ config CPU_CK860 endchoice choice + prompt "PAGE OFFSET" + default PAGE_OFFSET_80000000 + +config PAGE_OFFSET_80000000 + bool "PAGE OFFSET 2G (user:kernel = 2:2)" + +config PAGE_OFFSET_A0000000 + bool "PAGE OFFSET 2.5G (user:kernel = 2.5:1.5)" +endchoice + +config PAGE_OFFSET + hex + default 0x80000000 if PAGE_OFFSET_80000000 + default 0xa0000000 if PAGE_OFFSET_A0000000 +choice + prompt "C-SKY PMU type" depends on PERF_EVENTS depends on CPU_CK807 || CPU_CK810 || CPU_CK860 diff --git a/arch/csky/abiv1/inc/abi/cacheflush.h b/arch/csky/abiv1/inc/abi/cacheflush.h index d3e04208d53c..6cab7afae962 100644 --- a/arch/csky/abiv1/inc/abi/cacheflush.h +++ b/arch/csky/abiv1/inc/abi/cacheflush.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ABI_CSKY_CACHEFLUSH_H #define __ABI_CSKY_CACHEFLUSH_H diff --git a/arch/csky/abiv1/inc/abi/ckmmu.h b/arch/csky/abiv1/inc/abi/ckmmu.h index ba8eb5870835..416b30c57983 100644 --- a/arch/csky/abiv1/inc/abi/ckmmu.h +++ b/arch/csky/abiv1/inc/abi/ckmmu.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_CKMMUV1_H #define __ASM_CSKY_CKMMUV1_H @@ -89,13 +88,14 @@ static inline void tlb_invalid_indexed(void) cpwcr("cpcr8", 0x02000000); } -static inline void setup_pgd(unsigned long pgd, bool kernel) +static inline void setup_pgd(pgd_t *pgd, int asid) { - cpwcr("cpcr29", pgd | BIT(0)); + cpwcr("cpcr29", __pa(pgd) | BIT(0)); + write_mmu_entryhi(asid); } -static inline unsigned long get_pgd(void) +static inline pgd_t *get_pgd(void) { - return cprcr("cpcr29") & ~BIT(0); + return __va(cprcr("cpcr29") & ~BIT(0)); } #endif /* __ASM_CSKY_CKMMUV1_H */ diff --git a/arch/csky/abiv1/inc/abi/entry.h b/arch/csky/abiv1/inc/abi/entry.h index 13c23e2c707c..b6a2109b895e 100644 --- a/arch/csky/abiv1/inc/abi/entry.h +++ b/arch/csky/abiv1/inc/abi/entry.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_ENTRY_H #define __ASM_CSKY_ENTRY_H diff --git a/arch/csky/abiv1/inc/abi/page.h b/arch/csky/abiv1/inc/abi/page.h index c864519117c7..2d2159933b76 100644 --- a/arch/csky/abiv1/inc/abi/page.h +++ b/arch/csky/abiv1/inc/abi/page.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #include <asm/shmparam.h> diff --git a/arch/csky/abiv1/inc/abi/pgtable-bits.h b/arch/csky/abiv1/inc/abi/pgtable-bits.h index d605445aad9a..752c8b3f9194 100644 --- a/arch/csky/abiv1/inc/abi/pgtable-bits.h +++ b/arch/csky/abiv1/inc/abi/pgtable-bits.h @@ -1,37 +1,49 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PGTABLE_BITS_H #define __ASM_CSKY_PGTABLE_BITS_H /* implemented in software */ -#define _PAGE_ACCESSED (1<<3) -#define PAGE_ACCESSED_BIT (3) - +#define _PAGE_PRESENT (1<<0) #define _PAGE_READ (1<<1) #define _PAGE_WRITE (1<<2) -#define _PAGE_PRESENT (1<<0) - +#define _PAGE_ACCESSED (1<<3) #define _PAGE_MODIFIED (1<<4) -#define PAGE_MODIFIED_BIT (4) /* implemented in hardware */ #define _PAGE_GLOBAL (1<<6) - #define _PAGE_VALID (1<<7) -#define PAGE_VALID_BIT (7) - #define _PAGE_DIRTY (1<<8) -#define PAGE_DIRTY_BIT (8) #define _PAGE_CACHE (3<<9) #define _PAGE_UNCACHE (2<<9) #define _PAGE_SO _PAGE_UNCACHE - #define _CACHE_MASK (7<<9) -#define _CACHE_CACHED (_PAGE_VALID | _PAGE_CACHE) -#define _CACHE_UNCACHED (_PAGE_VALID | _PAGE_UNCACHE) +#define _CACHE_CACHED _PAGE_CACHE +#define _CACHE_UNCACHED _PAGE_UNCACHE + +#define _PAGE_PROT_NONE _PAGE_READ + +/* + * Encode and decode a swap entry + * + * Format of swap PTE: + * bit 0: _PAGE_PRESENT (zero) + * bit 1: _PAGE_READ (zero) + * bit 2 - 5: swap type[0 - 3] + * bit 6: _PAGE_GLOBAL (zero) + * bit 7: _PAGE_VALID (zero) + * bit 8: swap type[4] + * bit 9 - 31: swap offset + */ +#define __swp_type(x) ((((x).val >> 2) & 0xf) | \ + (((x).val >> 4) & 0x10)) +#define __swp_offset(x) ((x).val >> 9) +#define __swp_entry(type, offset) ((swp_entry_t) { \ + ((type & 0xf) << 2) | \ + ((type & 0x10) << 4) | \ + ((offset) << 9)}) #define HAVE_ARCH_UNMAPPED_AREA diff --git a/arch/csky/abiv1/inc/abi/reg_ops.h b/arch/csky/abiv1/inc/abi/reg_ops.h index a153bd3918f7..abd01a243388 100644 --- a/arch/csky/abiv1/inc/abi/reg_ops.h +++ b/arch/csky/abiv1/inc/abi/reg_ops.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ABI_REG_OPS_H #define __ABI_REG_OPS_H diff --git a/arch/csky/abiv1/inc/abi/regdef.h b/arch/csky/abiv1/inc/abi/regdef.h index 104707fbdcc1..7b386fd67070 100644 --- a/arch/csky/abiv1/inc/abi/regdef.h +++ b/arch/csky/abiv1/inc/abi/regdef.h @@ -1,10 +1,14 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_REGDEF_H #define __ASM_CSKY_REGDEF_H +#ifdef __ASSEMBLY__ #define syscallid r1 +#else +#define syscallid "r1" +#endif + #define regs_syscallid(regs) regs->regs[9] #define regs_fp(regs) regs->regs[2] diff --git a/arch/csky/abiv1/inc/abi/string.h b/arch/csky/abiv1/inc/abi/string.h index 0cd43384f8d2..9d95594b0feb 100644 --- a/arch/csky/abiv1/inc/abi/string.h +++ b/arch/csky/abiv1/inc/abi/string.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ABI_CSKY_STRING_H #define __ABI_CSKY_STRING_H diff --git a/arch/csky/abiv1/inc/abi/switch_context.h b/arch/csky/abiv1/inc/abi/switch_context.h index 17c82686498e..ec73fd7c9f87 100644 --- a/arch/csky/abiv1/inc/abi/switch_context.h +++ b/arch/csky/abiv1/inc/abi/switch_context.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ABI_CSKY_PTRACE_H #define __ABI_CSKY_PTRACE_H diff --git a/arch/csky/abiv1/inc/abi/vdso.h b/arch/csky/abiv1/inc/abi/vdso.h index 14352f524f1d..9e6d0a2fdd2b 100644 --- a/arch/csky/abiv1/inc/abi/vdso.h +++ b/arch/csky/abiv1/inc/abi/vdso.h @@ -1,17 +1,9 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#include <linux/uaccess.h> +#ifndef __ABI_CSKY_VDSO_H +#define __ABI_CSKY_VDSO_H -static inline int setup_vdso_page(unsigned short *ptr) -{ - int err = 0; +/* movi r1, 127; addi r1, (139 - 127) */ +#define SET_SYSCALL_ID .long 0x20b167f1 - /* movi r1, 127 */ - err |= __put_user(0x67f1, ptr + 0); - /* addi r1, (139 - 127) */ - err |= __put_user(0x20b1, ptr + 1); - /* trap 0 */ - err |= __put_user(0x0008, ptr + 2); - - return err; -} +#endif /* __ABI_CSKY_VDSO_H */ diff --git a/arch/csky/abiv2/cacheflush.c b/arch/csky/abiv2/cacheflush.c index 790f1ebfba44..39c51399dd81 100644 --- a/arch/csky/abiv2/cacheflush.c +++ b/arch/csky/abiv2/cacheflush.c @@ -12,6 +12,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, unsigned long addr; struct page *page; + if (!pfn_valid(pte_pfn(*pte))) + return; + page = pfn_to_page(pte_pfn(*pte)); if (page == ZERO_PAGE(0)) return; diff --git a/arch/csky/abiv2/inc/abi/ckmmu.h b/arch/csky/abiv2/inc/abi/ckmmu.h index 73ded7c72482..64215f2380f1 100644 --- a/arch/csky/abiv2/inc/abi/ckmmu.h +++ b/arch/csky/abiv2/inc/abi/ckmmu.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_CKMMUV2_H #define __ASM_CSKY_CKMMUV2_H @@ -78,8 +77,13 @@ static inline void tlb_read(void) static inline void tlb_invalid_all(void) { #ifdef CONFIG_CPU_HAS_TLBI - asm volatile("tlbi.alls\n":::"memory"); sync_is(); + asm volatile( + "tlbi.alls \n" + "sync.i \n" + : + : + : "memory"); #else mtcr("cr<8, 15>", 0x04000000); #endif @@ -88,8 +92,13 @@ static inline void tlb_invalid_all(void) static inline void local_tlb_invalid_all(void) { #ifdef CONFIG_CPU_HAS_TLBI - asm volatile("tlbi.all\n":::"memory"); sync_is(); + asm volatile( + "tlbi.all \n" + "sync.i \n" + : + : + : "memory"); #else tlb_invalid_all(); #endif @@ -100,16 +109,31 @@ static inline void tlb_invalid_indexed(void) mtcr("cr<8, 15>", 0x02000000); } -static inline void setup_pgd(unsigned long pgd, bool kernel) +#define NOP32 ".long 0x4820c400\n" + +static inline void setup_pgd(pgd_t *pgd, int asid) { - if (kernel) - mtcr("cr<28, 15>", pgd | BIT(0)); - else - mtcr("cr<29, 15>", pgd | BIT(0)); +#ifdef CONFIG_CPU_HAS_TLBI + sync_is(); +#else + mb(); +#endif + asm volatile( +#ifdef CONFIG_CPU_HAS_TLBI + "mtcr %1, cr<28, 15> \n" +#endif + "mtcr %1, cr<29, 15> \n" + "mtcr %0, cr< 4, 15> \n" + ".rept 64 \n" + NOP32 + ".endr \n" + : + :"r"(asid), "r"(__pa(pgd) | BIT(0)) + :"memory"); } -static inline unsigned long get_pgd(void) +static inline pgd_t *get_pgd(void) { - return mfcr("cr<29, 15>") & ~BIT(0); + return __va(mfcr("cr<29, 15>") & ~BIT(0)); } #endif /* __ASM_CSKY_CKMMUV2_H */ diff --git a/arch/csky/abiv2/inc/abi/entry.h b/arch/csky/abiv2/inc/abi/entry.h index bedcc6f06bba..cca63e699b58 100644 --- a/arch/csky/abiv2/inc/abi/entry.h +++ b/arch/csky/abiv2/inc/abi/entry.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_ENTRY_H #define __ASM_CSKY_ENTRY_H @@ -26,6 +25,9 @@ stw tls, (sp, 0) stw lr, (sp, 4) + RD_MEH lr + WR_MEH lr + mfcr lr, epc movi tls, \epc_inc add lr, tls @@ -231,6 +233,16 @@ mtcr \rx, cr<8, 15> .endm +#ifdef CONFIG_PAGE_OFFSET_80000000 +#define MSA_SET cr<30, 15> +#define MSA_CLR cr<31, 15> +#endif + +#ifdef CONFIG_PAGE_OFFSET_A0000000 +#define MSA_SET cr<31, 15> +#define MSA_CLR cr<30, 15> +#endif + .macro SETUP_MMU /* Init psr and enable ee */ lrw r6, DEFAULT_PSR_VALUE @@ -281,15 +293,15 @@ * 31 - 29 | 28 - 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 * BA Reserved SH WA B SO SEC C D V */ - mfcr r6, cr<30, 15> /* Get MSA0 */ + mfcr r6, MSA_SET /* Get MSA */ 2: lsri r6, 29 lsli r6, 29 addi r6, 0x1ce - mtcr r6, cr<30, 15> /* Set MSA0 */ + mtcr r6, MSA_SET /* Set MSA */ movi r6, 0 - mtcr r6, cr<31, 15> /* Clr MSA1 */ + mtcr r6, MSA_CLR /* Clr MSA */ /* enable MMU */ mfcr r6, cr18 diff --git a/arch/csky/abiv2/inc/abi/fpu.h b/arch/csky/abiv2/inc/abi/fpu.h index 09e2700a3693..aabb79355013 100644 --- a/arch/csky/abiv2/inc/abi/fpu.h +++ b/arch/csky/abiv2/inc/abi/fpu.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_FPU_H #define __ASM_CSKY_FPU_H diff --git a/arch/csky/abiv2/inc/abi/page.h b/arch/csky/abiv2/inc/abi/page.h index 0a70cb553dca..cf005f13cd15 100644 --- a/arch/csky/abiv2/inc/abi/page.h +++ b/arch/csky/abiv2/inc/abi/page.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. static inline void clear_user_page(void *addr, unsigned long vaddr, struct page *page) diff --git a/arch/csky/abiv2/inc/abi/pgtable-bits.h b/arch/csky/abiv2/inc/abi/pgtable-bits.h index 137f7932c83b..7e7f389f546f 100644 --- a/arch/csky/abiv2/inc/abi/pgtable-bits.h +++ b/arch/csky/abiv2/inc/abi/pgtable-bits.h @@ -1,37 +1,48 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PGTABLE_BITS_H #define __ASM_CSKY_PGTABLE_BITS_H /* implemented in software */ #define _PAGE_ACCESSED (1<<7) -#define PAGE_ACCESSED_BIT (7) - #define _PAGE_READ (1<<8) #define _PAGE_WRITE (1<<9) #define _PAGE_PRESENT (1<<10) - #define _PAGE_MODIFIED (1<<11) -#define PAGE_MODIFIED_BIT (11) /* implemented in hardware */ #define _PAGE_GLOBAL (1<<0) - #define _PAGE_VALID (1<<1) -#define PAGE_VALID_BIT (1) - #define _PAGE_DIRTY (1<<2) -#define PAGE_DIRTY_BIT (2) #define _PAGE_SO (1<<5) #define _PAGE_BUF (1<<6) - #define _PAGE_CACHE (1<<3) - #define _CACHE_MASK _PAGE_CACHE -#define _CACHE_CACHED (_PAGE_VALID | _PAGE_CACHE | _PAGE_BUF) -#define _CACHE_UNCACHED (_PAGE_VALID) +#define _CACHE_CACHED (_PAGE_CACHE | _PAGE_BUF) +#define _CACHE_UNCACHED (0) + +#define _PAGE_PROT_NONE _PAGE_WRITE + +/* + * Encode and decode a swap entry + * + * Format of swap PTE: + * bit 0: _PAGE_GLOBAL (zero) + * bit 1: _PAGE_VALID (zero) + * bit 2 - 6: swap type + * bit 7 - 8: swap offset[0 - 1] + * bit 9: _PAGE_WRITE (zero) + * bit 10: _PAGE_PRESENT (zero) + * bit 11 - 31: swap offset[2 - 22] + */ +#define __swp_type(x) (((x).val >> 2) & 0x1f) +#define __swp_offset(x) ((((x).val >> 7) & 0x3) | \ + (((x).val >> 9) & 0x7ffffc)) +#define __swp_entry(type, offset) ((swp_entry_t) { \ + ((type & 0x1f) << 2) | \ + ((offset & 0x3) << 7) | \ + ((offset & 0x7ffffc) << 9)}) #endif /* __ASM_CSKY_PGTABLE_BITS_H */ diff --git a/arch/csky/abiv2/inc/abi/reg_ops.h b/arch/csky/abiv2/inc/abi/reg_ops.h index ae82c3f26a6b..49ba18a64751 100644 --- a/arch/csky/abiv2/inc/abi/reg_ops.h +++ b/arch/csky/abiv2/inc/abi/reg_ops.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ABI_REG_OPS_H #define __ABI_REG_OPS_H diff --git a/arch/csky/abiv2/inc/abi/regdef.h b/arch/csky/abiv2/inc/abi/regdef.h index d7328bbc1ce7..0933addbc27b 100644 --- a/arch/csky/abiv2/inc/abi/regdef.h +++ b/arch/csky/abiv2/inc/abi/regdef.h @@ -1,10 +1,14 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_REGDEF_H #define __ASM_CSKY_REGDEF_H +#ifdef __ASSEMBLY__ #define syscallid r7 +#else +#define syscallid "r7" +#endif + #define regs_syscallid(regs) regs->regs[3] #define regs_fp(regs) regs->regs[4] diff --git a/arch/csky/abiv2/inc/abi/switch_context.h b/arch/csky/abiv2/inc/abi/switch_context.h index 73a81245a3b3..5dd5c3f4ee7e 100644 --- a/arch/csky/abiv2/inc/abi/switch_context.h +++ b/arch/csky/abiv2/inc/abi/switch_context.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ABI_CSKY_PTRACE_H #define __ABI_CSKY_PTRACE_H diff --git a/arch/csky/abiv2/inc/abi/vdso.h b/arch/csky/abiv2/inc/abi/vdso.h index b60d4a070326..40fd10d893ff 100644 --- a/arch/csky/abiv2/inc/abi/vdso.h +++ b/arch/csky/abiv2/inc/abi/vdso.h @@ -3,21 +3,7 @@ #ifndef __ABI_CSKY_VDSO_H #define __ABI_CSKY_VDSO_H -#include <linux/uaccess.h> +/* movi r7, 173 */ +#define SET_SYSCALL_ID .long 0x008bea07 -static inline int setup_vdso_page(unsigned short *ptr) -{ - int err = 0; - - /* movi r7, 173 */ - err |= __put_user(0xea07, ptr); - err |= __put_user(0x008b, ptr+1); - - /* trap 0 */ - err |= __put_user(0xc000, ptr+2); - err |= __put_user(0x2020, ptr+3); - - return err; -} - -#endif /* __ABI_CSKY_STRING_H */ +#endif /* __ABI_CSKY_VDSO_H */ diff --git a/arch/csky/abiv2/sysdep.h b/arch/csky/abiv2/sysdep.h index bbbedfd34777..61abe9201c50 100644 --- a/arch/csky/abiv2/sysdep.h +++ b/arch/csky/abiv2/sysdep.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __SYSDEP_H #define __SYSDEP_H diff --git a/arch/csky/include/asm/addrspace.h b/arch/csky/include/asm/addrspace.h index d1c2ede692ed..6fc05d44536c 100644 --- a/arch/csky/include/asm/addrspace.h +++ b/arch/csky/include/asm/addrspace.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_ADDRSPACE_H #define __ASM_CSKY_ADDRSPACE_H diff --git a/arch/csky/include/asm/atomic.h b/arch/csky/include/asm/atomic.h deleted file mode 100644 index e369d73b13e3..000000000000 --- a/arch/csky/include/asm/atomic.h +++ /dev/null @@ -1,212 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -#ifndef __ASM_CSKY_ATOMIC_H -#define __ASM_CSKY_ATOMIC_H - -#include <linux/version.h> -#include <asm/cmpxchg.h> -#include <asm/barrier.h> - -#ifdef CONFIG_CPU_HAS_LDSTEX - -#define __atomic_add_unless __atomic_add_unless -static inline int __atomic_add_unless(atomic_t *v, int a, int u) -{ - unsigned long tmp, ret; - - smp_mb(); - - asm volatile ( - "1: ldex.w %0, (%3) \n" - " mov %1, %0 \n" - " cmpne %0, %4 \n" - " bf 2f \n" - " add %0, %2 \n" - " stex.w %0, (%3) \n" - " bez %0, 1b \n" - "2: \n" - : "=&r" (tmp), "=&r" (ret) - : "r" (a), "r"(&v->counter), "r"(u) - : "memory"); - - if (ret != u) - smp_mb(); - - return ret; -} - -#define ATOMIC_OP(op, c_op) \ -static inline void atomic_##op(int i, atomic_t *v) \ -{ \ - unsigned long tmp; \ - \ - asm volatile ( \ - "1: ldex.w %0, (%2) \n" \ - " " #op " %0, %1 \n" \ - " stex.w %0, (%2) \n" \ - " bez %0, 1b \n" \ - : "=&r" (tmp) \ - : "r" (i), "r"(&v->counter) \ - : "memory"); \ -} - -#define ATOMIC_OP_RETURN(op, c_op) \ -static inline int atomic_##op##_return(int i, atomic_t *v) \ -{ \ - unsigned long tmp, ret; \ - \ - smp_mb(); \ - asm volatile ( \ - "1: ldex.w %0, (%3) \n" \ - " " #op " %0, %2 \n" \ - " mov %1, %0 \n" \ - " stex.w %0, (%3) \n" \ - " bez %0, 1b \n" \ - : "=&r" (tmp), "=&r" (ret) \ - : "r" (i), "r"(&v->counter) \ - : "memory"); \ - smp_mb(); \ - \ - return ret; \ -} - -#define ATOMIC_FETCH_OP(op, c_op) \ -static inline int atomic_fetch_##op(int i, atomic_t *v) \ -{ \ - unsigned long tmp, ret; \ - \ - smp_mb(); \ - asm volatile ( \ - "1: ldex.w %0, (%3) \n" \ - " mov %1, %0 \n" \ - " " #op " %0, %2 \n" \ - " stex.w %0, (%3) \n" \ - " bez %0, 1b \n" \ - : "=&r" (tmp), "=&r" (ret) \ - : "r" (i), "r"(&v->counter) \ - : "memory"); \ - smp_mb(); \ - \ - return ret; \ -} - -#else /* CONFIG_CPU_HAS_LDSTEX */ - -#include <linux/irqflags.h> - -#define __atomic_add_unless __atomic_add_unless -static inline int __atomic_add_unless(atomic_t *v, int a, int u) -{ - unsigned long tmp, ret, flags; - - raw_local_irq_save(flags); - - asm volatile ( - " ldw %0, (%3) \n" - " mov %1, %0 \n" - " cmpne %0, %4 \n" - " bf 2f \n" - " add %0, %2 \n" - " stw %0, (%3) \n" - "2: \n" - : "=&r" (tmp), "=&r" (ret) - : "r" (a), "r"(&v->counter), "r"(u) - : "memory"); - - raw_local_irq_restore(flags); - - return ret; -} - -#define ATOMIC_OP(op, c_op) \ -static inline void atomic_##op(int i, atomic_t *v) \ -{ \ - unsigned long tmp, flags; \ - \ - raw_local_irq_save(flags); \ - \ - asm volatile ( \ - " ldw %0, (%2) \n" \ - " " #op " %0, %1 \n" \ - " stw %0, (%2) \n" \ - : "=&r" (tmp) \ - : "r" (i), "r"(&v->counter) \ - : "memory"); \ - \ - raw_local_irq_restore(flags); \ -} - -#define ATOMIC_OP_RETURN(op, c_op) \ -static inline int atomic_##op##_return(int i, atomic_t *v) \ -{ \ - unsigned long tmp, ret, flags; \ - \ - raw_local_irq_save(flags); \ - \ - asm volatile ( \ - " ldw %0, (%3) \n" \ - " " #op " %0, %2 \n" \ - " stw %0, (%3) \n" \ - " mov %1, %0 \n" \ - : "=&r" (tmp), "=&r" (ret) \ - : "r" (i), "r"(&v->counter) \ - : "memory"); \ - \ - raw_local_irq_restore(flags); \ - \ - return ret; \ -} - -#define ATOMIC_FETCH_OP(op, c_op) \ -static inline int atomic_fetch_##op(int i, atomic_t *v) \ -{ \ - unsigned long tmp, ret, flags; \ - \ - raw_local_irq_save(flags); \ - \ - asm volatile ( \ - " ldw %0, (%3) \n" \ - " mov %1, %0 \n" \ - " " #op " %0, %2 \n" \ - " stw %0, (%3) \n" \ - : "=&r" (tmp), "=&r" (ret) \ - : "r" (i), "r"(&v->counter) \ - : "memory"); \ - \ - raw_local_irq_restore(flags); \ - \ - return ret; \ -} - -#endif /* CONFIG_CPU_HAS_LDSTEX */ - -#define atomic_add_return atomic_add_return -ATOMIC_OP_RETURN(add, +) -#define atomic_sub_return atomic_sub_return -ATOMIC_OP_RETURN(sub, -) - -#define atomic_fetch_add atomic_fetch_add -ATOMIC_FETCH_OP(add, +) -#define atomic_fetch_sub atomic_fetch_sub -ATOMIC_FETCH_OP(sub, -) -#define atomic_fetch_and atomic_fetch_and -ATOMIC_FETCH_OP(and, &) -#define atomic_fetch_or atomic_fetch_or -ATOMIC_FETCH_OP(or, |) -#define atomic_fetch_xor atomic_fetch_xor -ATOMIC_FETCH_OP(xor, ^) - -#define atomic_and atomic_and -ATOMIC_OP(and, &) -#define atomic_or atomic_or -ATOMIC_OP(or, |) -#define atomic_xor atomic_xor -ATOMIC_OP(xor, ^) - -#undef ATOMIC_FETCH_OP -#undef ATOMIC_OP_RETURN -#undef ATOMIC_OP - -#include <asm-generic/atomic.h> - -#endif /* __ASM_CSKY_ATOMIC_H */ diff --git a/arch/csky/include/asm/barrier.h b/arch/csky/include/asm/barrier.h index a430e7fddf35..84fc600c8b45 100644 --- a/arch/csky/include/asm/barrier.h +++ b/arch/csky/include/asm/barrier.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_BARRIER_H #define __ASM_CSKY_BARRIER_H @@ -8,6 +7,61 @@ #define nop() asm volatile ("nop\n":::"memory") +#ifdef CONFIG_SMP + +/* + * bar.brwarws: ordering barrier for all load/store instructions + * before/after + * + * |31|30 26|25 21|20 16|15 10|9 5|4 0| + * 1 10000 00000 00000 100001 00001 0 bw br aw ar + * + * b: before + * a: after + * r: read + * w: write + * + * Here are all combinations: + * + * bar.brw + * bar.br + * bar.bw + * bar.arw + * bar.ar + * bar.aw + * bar.brwarw + * bar.brarw + * bar.bwarw + * bar.brwar + * bar.brwaw + * bar.brar + * bar.bwaw + */ +#define __bar_brw() asm volatile (".long 0x842cc000\n":::"memory") +#define __bar_br() asm volatile (".long 0x8424c000\n":::"memory") +#define __bar_bw() asm volatile (".long 0x8428c000\n":::"memory") +#define __bar_arw() asm volatile (".long 0x8423c000\n":::"memory") +#define __bar_ar() asm volatile (".long 0x8421c000\n":::"memory") +#define __bar_aw() asm volatile (".long 0x8422c000\n":::"memory") +#define __bar_brwarw() asm volatile (".long 0x842fc000\n":::"memory") +#define __bar_brarw() asm volatile (".long 0x8427c000\n":::"memory") +#define __bar_bwarw() asm volatile (".long 0x842bc000\n":::"memory") +#define __bar_brwar() asm volatile (".long 0x842dc000\n":::"memory") +#define __bar_brwaw() asm volatile (".long 0x842ec000\n":::"memory") +#define __bar_brar() asm volatile (".long 0x8425c000\n":::"memory") +#define __bar_brar() asm volatile (".long 0x8425c000\n":::"memory") +#define __bar_bwaw() asm volatile (".long 0x842ac000\n":::"memory") + +#define __smp_mb() __bar_brwarw() +#define __smp_rmb() __bar_brar() +#define __smp_wmb() __bar_bwaw() + +#define ACQUIRE_FENCE ".long 0x8427c000\n" +#define __smp_acquire_fence() __bar_brarw() +#define __smp_release_fence() __bar_brwaw() + +#endif /* CONFIG_SMP */ + /* * sync: completion barrier, all sync.xx instructions * guarantee the last response recieved by bus transaction @@ -15,31 +69,14 @@ * sync.s: inherit from sync, but also shareable to other cores * sync.i: inherit from sync, but also flush cpu pipeline * sync.is: the same with sync.i + sync.s - * - * bar.brwarw: ordering barrier for all load/store instructions before it - * bar.brwarws: ordering barrier for all load/store instructions before it - * and shareable to other cores - * bar.brar: ordering barrier for all load instructions before it - * bar.brars: ordering barrier for all load instructions before it - * and shareable to other cores - * bar.bwaw: ordering barrier for all store instructions before it - * bar.bwaws: ordering barrier for all store instructions before it - * and shareable to other cores */ +#define mb() asm volatile ("sync\n":::"memory") #ifdef CONFIG_CPU_HAS_CACHEV2 -#define mb() asm volatile ("sync.s\n":::"memory") - -#ifdef CONFIG_SMP -#define __smp_mb() asm volatile ("bar.brwarws\n":::"memory") -#define __smp_rmb() asm volatile ("bar.brars\n":::"memory") -#define __smp_wmb() asm volatile ("bar.bwaws\n":::"memory") -#endif /* CONFIG_SMP */ - -#define sync_is() asm volatile ("sync.is\n":::"memory") - -#else /* !CONFIG_CPU_HAS_CACHEV2 */ -#define mb() asm volatile ("sync\n":::"memory") +/* + * Using three sync.is to prevent speculative PTW + */ +#define sync_is() asm volatile ("sync.is\nsync.is\nsync.is\n":::"memory") #endif #include <asm-generic/barrier.h> diff --git a/arch/csky/include/asm/bitops.h b/arch/csky/include/asm/bitops.h index 43b9838bff63..91818787d860 100644 --- a/arch/csky/include/asm/bitops.h +++ b/arch/csky/include/asm/bitops.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_BITOPS_H #define __ASM_CSKY_BITOPS_H diff --git a/arch/csky/include/asm/bug.h b/arch/csky/include/asm/bug.h index 33ebd16b9c78..03f1a5f9184a 100644 --- a/arch/csky/include/asm/bug.h +++ b/arch/csky/include/asm/bug.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_BUG_H #define __ASM_CSKY_BUG_H @@ -21,6 +20,8 @@ do { \ struct pt_regs; void die(struct pt_regs *regs, const char *str); +void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr); + void show_regs(struct pt_regs *regs); void show_code(struct pt_regs *regs); diff --git a/arch/csky/include/asm/cacheflush.h b/arch/csky/include/asm/cacheflush.h index f0b8f25429a2..d0f9eafe8988 100644 --- a/arch/csky/include/asm/cacheflush.h +++ b/arch/csky/include/asm/cacheflush.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_CACHEFLUSH_H #define __ASM_CSKY_CACHEFLUSH_H diff --git a/arch/csky/include/asm/checksum.h b/arch/csky/include/asm/checksum.h index 7685824291b1..aa12ef4b9080 100644 --- a/arch/csky/include/asm/checksum.h +++ b/arch/csky/include/asm/checksum.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_CHECKSUM_H #define __ASM_CSKY_CHECKSUM_H diff --git a/arch/csky/include/asm/clocksource.h b/arch/csky/include/asm/clocksource.h new file mode 100644 index 000000000000..54da0e49efa1 --- /dev/null +++ b/arch/csky/include/asm/clocksource.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_VDSO_CSKY_CLOCKSOURCE_H +#define __ASM_VDSO_CSKY_CLOCKSOURCE_H + +#include <asm/vdso/clocksource.h> + +#endif diff --git a/arch/csky/include/asm/cmpxchg.h b/arch/csky/include/asm/cmpxchg.h index 89224530a0ee..dabc8e46ce7b 100644 --- a/arch/csky/include/asm/cmpxchg.h +++ b/arch/csky/include/asm/cmpxchg.h @@ -3,12 +3,12 @@ #ifndef __ASM_CSKY_CMPXCHG_H #define __ASM_CSKY_CMPXCHG_H -#ifdef CONFIG_CPU_HAS_LDSTEX +#ifdef CONFIG_SMP #include <asm/barrier.h> extern void __bad_xchg(void); -#define __xchg(new, ptr, size) \ +#define __xchg_relaxed(new, ptr, size) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ __typeof__(new) __new = (new); \ @@ -16,7 +16,6 @@ extern void __bad_xchg(void); unsigned long tmp; \ switch (size) { \ case 4: \ - smp_mb(); \ asm volatile ( \ "1: ldex.w %0, (%3) \n" \ " mov %1, %2 \n" \ @@ -25,7 +24,6 @@ extern void __bad_xchg(void); : "=&r" (__ret), "=&r" (tmp) \ : "r" (__new), "r"(__ptr) \ :); \ - smp_mb(); \ break; \ default: \ __bad_xchg(); \ @@ -33,9 +31,10 @@ extern void __bad_xchg(void); __ret; \ }) -#define xchg(ptr, x) (__xchg((x), (ptr), sizeof(*(ptr)))) +#define xchg_relaxed(ptr, x) \ + (__xchg_relaxed((x), (ptr), sizeof(*(ptr)))) -#define __cmpxchg(ptr, old, new, size) \ +#define __cmpxchg_relaxed(ptr, old, new, size) \ ({ \ __typeof__(ptr) __ptr = (ptr); \ __typeof__(new) __new = (new); \ @@ -44,7 +43,6 @@ extern void __bad_xchg(void); __typeof__(*(ptr)) __ret; \ switch (size) { \ case 4: \ - smp_mb(); \ asm volatile ( \ "1: ldex.w %0, (%3) \n" \ " cmpne %0, %4 \n" \ @@ -56,7 +54,6 @@ extern void __bad_xchg(void); : "=&r" (__ret), "=&r" (__tmp) \ : "r" (__new), "r"(__ptr), "r"(__old) \ :); \ - smp_mb(); \ break; \ default: \ __bad_xchg(); \ @@ -64,8 +61,18 @@ extern void __bad_xchg(void); __ret; \ }) -#define cmpxchg(ptr, o, n) \ - (__cmpxchg((ptr), (o), (n), sizeof(*(ptr)))) +#define cmpxchg_relaxed(ptr, o, n) \ + (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) + +#define cmpxchg(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) __ret; \ + __smp_release_fence(); \ + __ret = cmpxchg_relaxed(ptr, o, n); \ + __smp_acquire_fence(); \ + __ret; \ +}) + #else #include <asm-generic/cmpxchg.h> #endif diff --git a/arch/csky/include/asm/elf.h b/arch/csky/include/asm/elf.h index eb2cc5a673b5..48b83e283ed4 100644 --- a/arch/csky/include/asm/elf.h +++ b/arch/csky/include/asm/elf.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_ELF_H #define __ASM_CSKY_ELF_H diff --git a/arch/csky/include/asm/fixmap.h b/arch/csky/include/asm/fixmap.h index 4b589cc20900..49a77cbbe2a9 100644 --- a/arch/csky/include/asm/fixmap.h +++ b/arch/csky/include/asm/fixmap.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_FIXMAP_H #define __ASM_CSKY_FIXMAP_H diff --git a/arch/csky/include/asm/ftrace.h b/arch/csky/include/asm/ftrace.h index fae72b0b1374..9b86341731b6 100644 --- a/arch/csky/include/asm/ftrace.h +++ b/arch/csky/include/asm/ftrace.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_FTRACE_H #define __ASM_CSKY_FTRACE_H diff --git a/arch/csky/include/asm/futex.h b/arch/csky/include/asm/futex.h new file mode 100644 index 000000000000..6cfd312723fa --- /dev/null +++ b/arch/csky/include/asm/futex.h @@ -0,0 +1,121 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_CSKY_FUTEX_H +#define __ASM_CSKY_FUTEX_H + +#ifndef CONFIG_SMP +#include <asm-generic/futex.h> +#else +#include <linux/atomic.h> +#include <linux/futex.h> +#include <linux/uaccess.h> +#include <linux/errno.h> + +#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \ +{ \ + u32 tmp; \ + \ + __atomic_pre_full_fence(); \ + \ + __asm__ __volatile__ ( \ + "1: ldex.w %[ov], %[u] \n" \ + " "insn" \n" \ + "2: stex.w %[t], %[u] \n" \ + " bez %[t], 1b \n" \ + " br 4f \n" \ + "3: mov %[r], %[e] \n" \ + "4: \n" \ + " .section __ex_table,\"a\" \n" \ + " .balign 4 \n" \ + " .long 1b, 3b \n" \ + " .long 2b, 3b \n" \ + " .previous \n" \ + : [r] "+r" (ret), [ov] "=&r" (oldval), \ + [u] "+m" (*uaddr), [t] "=&r" (tmp) \ + : [op] "Jr" (oparg), [e] "jr" (-EFAULT) \ + : "memory"); \ + \ + __atomic_post_full_fence(); \ +} + +static inline int +arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr) +{ + int oldval = 0, ret = 0; + + if (!access_ok(uaddr, sizeof(u32))) + return -EFAULT; + + switch (op) { + case FUTEX_OP_SET: + __futex_atomic_op("mov %[t], %[ov]", + ret, oldval, uaddr, oparg); + break; + case FUTEX_OP_ADD: + __futex_atomic_op("add %[t], %[ov], %[op]", + ret, oldval, uaddr, oparg); + break; + case FUTEX_OP_OR: + __futex_atomic_op("or %[t], %[ov], %[op]", + ret, oldval, uaddr, oparg); + break; + case FUTEX_OP_ANDN: + __futex_atomic_op("and %[t], %[ov], %[op]", + ret, oldval, uaddr, ~oparg); + break; + case FUTEX_OP_XOR: + __futex_atomic_op("xor %[t], %[ov], %[op]", + ret, oldval, uaddr, oparg); + break; + default: + ret = -ENOSYS; + } + + if (!ret) + *oval = oldval; + + return ret; +} + + + +static inline int +futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, + u32 oldval, u32 newval) +{ + int ret = 0; + u32 val, tmp; + + if (!access_ok(uaddr, sizeof(u32))) + return -EFAULT; + + __atomic_pre_full_fence(); + + __asm__ __volatile__ ( + "1: ldex.w %[v], %[u] \n" + " cmpne %[v], %[ov] \n" + " bt 4f \n" + " mov %[t], %[nv] \n" + "2: stex.w %[t], %[u] \n" + " bez %[t], 1b \n" + " br 4f \n" + "3: mov %[r], %[e] \n" + "4: \n" + " .section __ex_table,\"a\" \n" + " .balign 4 \n" + " .long 1b, 3b \n" + " .long 2b, 3b \n" + " .previous \n" + : [r] "+r" (ret), [v] "=&r" (val), [u] "+m" (*uaddr), + [t] "=&r" (tmp) + : [ov] "Jr" (oldval), [nv] "Jr" (newval), [e] "Jr" (-EFAULT) + : "memory"); + + __atomic_post_full_fence(); + + *uval = val; + return ret; +} + +#endif /* CONFIG_SMP */ +#endif /* __ASM_CSKY_FUTEX_H */ diff --git a/arch/csky/include/asm/highmem.h b/arch/csky/include/asm/highmem.h index 1f4ed3f4c0d9..1ed810effb3d 100644 --- a/arch/csky/include/asm/highmem.h +++ b/arch/csky/include/asm/highmem.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_HIGHMEM_H #define __ASM_CSKY_HIGHMEM_H diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h index e909587f24c5..f82654053dc0 100644 --- a/arch/csky/include/asm/io.h +++ b/arch/csky/include/asm/io.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_IO_H #define __ASM_CSKY_IO_H diff --git a/arch/csky/include/asm/memory.h b/arch/csky/include/asm/memory.h index a65c6759f537..d12179801ae3 100644 --- a/arch/csky/include/asm/memory.h +++ b/arch/csky/include/asm/memory.h @@ -10,7 +10,7 @@ #define FIXADDR_TOP _AC(0xffffc000, UL) #define PKMAP_BASE _AC(0xff800000, UL) -#define VMALLOC_START _AC(0xc0008000, UL) +#define VMALLOC_START (PAGE_OFFSET + LOWMEM_LIMIT + (PAGE_SIZE * 8)) #define VMALLOC_END (PKMAP_BASE - (PAGE_SIZE * 2)) #ifdef CONFIG_HAVE_TCM diff --git a/arch/csky/include/asm/mmu.h b/arch/csky/include/asm/mmu.h index 26fbb1d15df0..d78321901d06 100644 --- a/arch/csky/include/asm/mmu.h +++ b/arch/csky/include/asm/mmu.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_MMU_H #define __ASM_CSKY_MMU_H diff --git a/arch/csky/include/asm/mmu_context.h b/arch/csky/include/asm/mmu_context.h index b227d29393a8..95d99b30792c 100644 --- a/arch/csky/include/asm/mmu_context.h +++ b/arch/csky/include/asm/mmu_context.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_MMU_CONTEXT_H #define __ASM_CSKY_MMU_CONTEXT_H @@ -14,12 +13,6 @@ #include <linux/sched.h> #include <abi/ckmmu.h> -#define TLBMISS_HANDLER_SETUP_PGD(pgd) \ - setup_pgd(__pa(pgd), false) - -#define TLBMISS_HANDLER_SETUP_PGD_KERNEL(pgd) \ - setup_pgd(__pa(pgd), true) - #define ASID_MASK ((1 << CONFIG_CPU_ASID_BITS) - 1) #define cpu_asid(mm) (atomic64_read(&mm->context.asid) & ASID_MASK) @@ -36,8 +29,7 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next, if (prev != next) check_and_switch_context(next, cpu); - TLBMISS_HANDLER_SETUP_PGD(next->pgd); - write_mmu_entryhi(next->context.asid.counter); + setup_pgd(next->pgd, next->context.asid.counter); flush_icache_deferred(next); } diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h index 9b98bf31d57c..3b91fc3cf36f 100644 --- a/arch/csky/include/asm/page.h +++ b/arch/csky/include/asm/page.h @@ -24,7 +24,7 @@ * address region. We use them mapping kernel 1GB direct-map address area and * for more than 1GB of memory we use highmem. */ -#define PAGE_OFFSET 0x80000000 +#define PAGE_OFFSET CONFIG_PAGE_OFFSET #define SSEG_SIZE 0x20000000 #define LOWMEM_LIMIT (SSEG_SIZE * 2) diff --git a/arch/csky/include/asm/perf_event.h b/arch/csky/include/asm/perf_event.h index 572093e11001..249905d8a4e8 100644 --- a/arch/csky/include/asm/perf_event.h +++ b/arch/csky/include/asm/perf_event.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PERF_EVENT_H #define __ASM_CSKY_PERF_EVENT_H diff --git a/arch/csky/include/asm/pgalloc.h b/arch/csky/include/asm/pgalloc.h index d58d8146b729..cd211aabbefd 100644 --- a/arch/csky/include/asm/pgalloc.h +++ b/arch/csky/include/asm/pgalloc.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PGALLOC_H #define __ASM_CSKY_PGALLOC_H @@ -71,7 +70,7 @@ do { \ } while (0) extern void pagetable_init(void); -extern void pre_mmu_init(void); +extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn); extern void pre_trap_init(void); #endif /* __ASM_CSKY_PGALLOC_H */ diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h index 2002cb7f1053..0d60367b6bfa 100644 --- a/arch/csky/include/asm/pgtable.h +++ b/arch/csky/include/asm/pgtable.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PGTABLE_H #define __ASM_CSKY_PGTABLE_H @@ -14,7 +13,7 @@ #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) -#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE) +#define USER_PTRS_PER_PGD (PAGE_OFFSET/PGDIR_SIZE) #define FIRST_USER_ADDRESS 0UL /* @@ -34,23 +33,13 @@ #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) #define pte_clear(mm, addr, ptep) set_pte((ptep), \ - (((unsigned int) addr & PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0))) + (((unsigned int) addr >= PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0))) #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) #define pte_pfn(x) ((unsigned long)((x).pte_low >> PAGE_SHIFT)) #define pfn_pte(pfn, prot) __pte(((unsigned long long)(pfn) << PAGE_SHIFT) \ | pgprot_val(prot)) -#define __READABLE (_PAGE_READ | _PAGE_VALID | _PAGE_ACCESSED) -#define __WRITEABLE (_PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED) - -#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | \ - _CACHE_MASK) - -#define __swp_type(x) (((x).val >> 4) & 0xff) -#define __swp_offset(x) ((x).val >> 12) -#define __swp_entry(type, offset) ((swp_entry_t) {((type) << 4) | \ - ((offset) << 12) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) @@ -59,41 +48,52 @@ pgprot_val(pgprot)) /* - * CSKY can't do page protection for execute, and considers that the same like - * read. Also, write permissions imply read permissions. This is the closest - * we can get by reasonable means.. + * C-SKY only has VALID and DIRTY bit in hardware. So we need to use the + * two bits emulate PRESENT, READ, WRITE, EXEC, MODIFIED, ACCESSED. */ -#define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHED) -#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ +#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED) + +#define PAGE_NONE __pgprot(_PAGE_PROT_NONE) +#define PAGE_READ __pgprot(_PAGE_BASE | _PAGE_READ | \ _CACHE_CACHED) -#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED) -#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED) -#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ - _PAGE_GLOBAL | _CACHE_CACHED) -#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ +#define PAGE_WRITE __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_WRITE | \ _CACHE_CACHED) +#define PAGE_SHARED PAGE_WRITE + +#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_VALID | \ + _PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED | \ + _PAGE_GLOBAL | \ + _CACHE_CACHED) + +#define _PAGE_IOREMAP (_PAGE_BASE | _PAGE_READ | _PAGE_VALID | \ + _PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED | \ + _PAGE_GLOBAL | \ + _CACHE_UNCACHED | _PAGE_SO) + +#define _PAGE_CHG_MASK (~(unsigned long) \ + (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ + _CACHE_MASK | _PAGE_GLOBAL)) -#define _PAGE_IOREMAP \ - (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL | \ - _CACHE_UNCACHED | _PAGE_SO) +#define MAX_SWAPFILES_CHECK() \ + BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5) #define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY +#define __P001 PAGE_READ +#define __P010 PAGE_READ +#define __P011 PAGE_READ +#define __P100 PAGE_READ +#define __P101 PAGE_READ +#define __P110 PAGE_READ +#define __P111 PAGE_READ #define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED +#define __S001 PAGE_READ +#define __S010 PAGE_WRITE +#define __S011 PAGE_WRITE +#define __S100 PAGE_READ +#define __S101 PAGE_READ +#define __S110 PAGE_WRITE +#define __S111 PAGE_WRITE extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h index 4800f6563abb..9e933021fe8e 100644 --- a/arch/csky/include/asm/processor.h +++ b/arch/csky/include/asm/processor.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PROCESSOR_H #define __ASM_CSKY_PROCESSOR_H @@ -28,7 +27,7 @@ extern struct cpuinfo_csky cpu_data[]; * for a 64 bit kernel expandable to 8192EB, of which the current CSKY * implementations will "only" be able to use 1TB ... */ -#define TASK_SIZE 0x7fff8000UL +#define TASK_SIZE (PAGE_OFFSET - (PAGE_SIZE * 8)) #ifdef __KERNEL__ #define STACK_TOP TASK_SIZE diff --git a/arch/csky/include/asm/ptrace.h b/arch/csky/include/asm/ptrace.h index 91ceb1b454c9..4202aab6df42 100644 --- a/arch/csky/include/asm/ptrace.h +++ b/arch/csky/include/asm/ptrace.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PTRACE_H #define __ASM_CSKY_PTRACE_H diff --git a/arch/csky/include/asm/segment.h b/arch/csky/include/asm/segment.h index 79ede9b1a646..589e8321dc14 100644 --- a/arch/csky/include/asm/segment.h +++ b/arch/csky/include/asm/segment.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_SEGMENT_H #define __ASM_CSKY_SEGMENT_H @@ -10,7 +9,7 @@ typedef struct { #define KERNEL_DS ((mm_segment_t) { 0xFFFFFFFF }) -#define USER_DS ((mm_segment_t) { 0x80000000UL }) +#define USER_DS ((mm_segment_t) { PAGE_OFFSET }) #define get_fs() (current_thread_info()->addr_limit) #define set_fs(x) (current_thread_info()->addr_limit = (x)) #define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg) diff --git a/arch/csky/include/asm/shmparam.h b/arch/csky/include/asm/shmparam.h index efafe4c79fed..2fe6cea0dae9 100644 --- a/arch/csky/include/asm/shmparam.h +++ b/arch/csky/include/asm/shmparam.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_SHMPARAM_H #define __ASM_CSKY_SHMPARAM_H diff --git a/arch/csky/include/asm/spinlock.h b/arch/csky/include/asm/spinlock.h index 7cf3f2b34cea..69f5aa249c5f 100644 --- a/arch/csky/include/asm/spinlock.h +++ b/arch/csky/include/asm/spinlock.h @@ -6,8 +6,6 @@ #include <linux/spinlock_types.h> #include <asm/barrier.h> -#ifdef CONFIG_QUEUED_RWLOCKS - /* * Ticket-based spin-locking. */ @@ -88,169 +86,4 @@ static inline int arch_spin_is_contended(arch_spinlock_t *lock) #include <asm/qrwlock.h> -/* See include/linux/spinlock.h */ -#define smp_mb__after_spinlock() smp_mb() - -#else /* CONFIG_QUEUED_RWLOCKS */ - -/* - * Test-and-set spin-locking. - */ -static inline void arch_spin_lock(arch_spinlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - asm volatile ( - "1: ldex.w %0, (%1) \n" - " bnez %0, 1b \n" - " movi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); - smp_mb(); -} - -static inline void arch_spin_unlock(arch_spinlock_t *lock) -{ - smp_mb(); - WRITE_ONCE(lock->lock, 0); -} - -static inline int arch_spin_trylock(arch_spinlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - asm volatile ( - "1: ldex.w %0, (%1) \n" - " bnez %0, 2f \n" - " movi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - " movi %0, 0 \n" - "2: \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); - - if (!tmp) - smp_mb(); - - return !tmp; -} - -#define arch_spin_is_locked(x) (READ_ONCE((x)->lock) != 0) - -/* - * read lock/unlock/trylock - */ -static inline void arch_read_lock(arch_rwlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - asm volatile ( - "1: ldex.w %0, (%1) \n" - " blz %0, 1b \n" - " addi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); - smp_mb(); -} - -static inline void arch_read_unlock(arch_rwlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - smp_mb(); - asm volatile ( - "1: ldex.w %0, (%1) \n" - " subi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); -} - -static inline int arch_read_trylock(arch_rwlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - asm volatile ( - "1: ldex.w %0, (%1) \n" - " blz %0, 2f \n" - " addi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - " movi %0, 0 \n" - "2: \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); - - if (!tmp) - smp_mb(); - - return !tmp; -} - -/* - * write lock/unlock/trylock - */ -static inline void arch_write_lock(arch_rwlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - asm volatile ( - "1: ldex.w %0, (%1) \n" - " bnez %0, 1b \n" - " subi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); - smp_mb(); -} - -static inline void arch_write_unlock(arch_rwlock_t *lock) -{ - smp_mb(); - WRITE_ONCE(lock->lock, 0); -} - -static inline int arch_write_trylock(arch_rwlock_t *lock) -{ - u32 *p = &lock->lock; - u32 tmp; - - asm volatile ( - "1: ldex.w %0, (%1) \n" - " bnez %0, 2f \n" - " subi %0, 1 \n" - " stex.w %0, (%1) \n" - " bez %0, 1b \n" - " movi %0, 0 \n" - "2: \n" - : "=&r" (tmp) - : "r"(p) - : "cc"); - - if (!tmp) - smp_mb(); - - return !tmp; -} - -#endif /* CONFIG_QUEUED_RWLOCKS */ #endif /* __ASM_CSKY_SPINLOCK_H */ diff --git a/arch/csky/include/asm/spinlock_types.h b/arch/csky/include/asm/spinlock_types.h index 88b82438b182..8ff0f6ff3a00 100644 --- a/arch/csky/include/asm/spinlock_types.h +++ b/arch/csky/include/asm/spinlock_types.h @@ -22,16 +22,6 @@ typedef struct { #define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } } -#ifdef CONFIG_QUEUED_RWLOCKS #include <asm-generic/qrwlock_types.h> -#else /* CONFIG_NR_CPUS > 2 */ - -typedef struct { - u32 lock; -} arch_rwlock_t; - -#define __ARCH_RW_LOCK_UNLOCKED { 0 } - -#endif /* CONFIG_QUEUED_RWLOCKS */ #endif /* __ASM_CSKY_SPINLOCK_TYPES_H */ diff --git a/arch/csky/include/asm/string.h b/arch/csky/include/asm/string.h index 73142de18355..a0d81e9d6b8f 100644 --- a/arch/csky/include/asm/string.h +++ b/arch/csky/include/asm/string.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef _CSKY_STRING_MM_H_ #define _CSKY_STRING_MM_H_ diff --git a/arch/csky/include/asm/switch_to.h b/arch/csky/include/asm/switch_to.h index 35a39e88933d..731e466415e2 100644 --- a/arch/csky/include/asm/switch_to.h +++ b/arch/csky/include/asm/switch_to.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_SWITCH_TO_H #define __ASM_CSKY_SWITCH_TO_H diff --git a/arch/csky/include/asm/syscalls.h b/arch/csky/include/asm/syscalls.h index 5d48e5e0082e..ea9ce6138b9b 100644 --- a/arch/csky/include/asm/syscalls.h +++ b/arch/csky/include/asm/syscalls.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_SYSCALLS_H #define __ASM_CSKY_SYSCALLS_H diff --git a/arch/csky/include/asm/thread_info.h b/arch/csky/include/asm/thread_info.h index 21456a3737c2..8c349a8f904d 100644 --- a/arch/csky/include/asm/thread_info.h +++ b/arch/csky/include/asm/thread_info.h @@ -1,12 +1,10 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef _ASM_CSKY_THREAD_INFO_H #define _ASM_CSKY_THREAD_INFO_H #ifndef __ASSEMBLY__ -#include <linux/version.h> #include <asm/types.h> #include <asm/page.h> #include <asm/processor.h> diff --git a/arch/csky/include/asm/tlb.h b/arch/csky/include/asm/tlb.h index fdff9b8d70c8..3498e65f59f8 100644 --- a/arch/csky/include/asm/tlb.h +++ b/arch/csky/include/asm/tlb.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_TLB_H #define __ASM_CSKY_TLB_H diff --git a/arch/csky/include/asm/tlbflush.h b/arch/csky/include/asm/tlbflush.h index 6845b0667703..407160b4fde7 100644 --- a/arch/csky/include/asm/tlbflush.h +++ b/arch/csky/include/asm/tlbflush.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_TLBFLUSH_H #define __ASM_TLBFLUSH_H diff --git a/arch/csky/include/asm/traps.h b/arch/csky/include/asm/traps.h index 1c081805b962..421a4195e2fe 100644 --- a/arch/csky/include/asm/traps.h +++ b/arch/csky/include/asm/traps.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_TRAPS_H #define __ASM_CSKY_TRAPS_H diff --git a/arch/csky/include/asm/uaccess.h b/arch/csky/include/asm/uaccess.h index 1633ffe5ae15..3dec272e1fa3 100644 --- a/arch/csky/include/asm/uaccess.h +++ b/arch/csky/include/asm/uaccess.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_UACCESS_H #define __ASM_CSKY_UACCESS_H diff --git a/arch/csky/include/asm/unistd.h b/arch/csky/include/asm/unistd.h index da7a18295615..9cf97de9a26d 100644 --- a/arch/csky/include/asm/unistd.h +++ b/arch/csky/include/asm/unistd.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #include <uapi/asm/unistd.h> diff --git a/arch/csky/include/asm/vdso.h b/arch/csky/include/asm/vdso.h index d963d691f3a1..eb5142f9c564 100644 --- a/arch/csky/include/asm/vdso.h +++ b/arch/csky/include/asm/vdso.h @@ -3,10 +3,25 @@ #ifndef __ASM_CSKY_VDSO_H #define __ASM_CSKY_VDSO_H -#include <abi/vdso.h> +#include <linux/types.h> -struct csky_vdso { - unsigned short rt_signal_retcode[4]; +#ifndef GENERIC_TIME_VSYSCALL +struct vdso_data { }; +#endif + +/* + * The VDSO symbols are mapped into Linux so we can just use regular symbol + * addressing to get their offsets in userspace. The symbols are mapped at an + * offset of 0, but since the linker must support setting weak undefined + * symbols to the absolute address 0 it also happens to support other low + * addresses even when the code model suggests those low addresses would not + * otherwise be availiable. + */ +#define VDSO_SYMBOL(base, name) \ +({ \ + extern const char __vdso_##name[]; \ + (void __user *)((unsigned long)(base) + __vdso_##name); \ +}) #endif /* __ASM_CSKY_VDSO_H */ diff --git a/arch/csky/include/asm/vdso/clocksource.h b/arch/csky/include/asm/vdso/clocksource.h new file mode 100644 index 000000000000..dfca7b4724b7 --- /dev/null +++ b/arch/csky/include/asm/vdso/clocksource.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_VDSO_CSKY_CLOCKSOURCE_H +#define __ASM_VDSO_CSKY_CLOCKSOURCE_H + +#define VDSO_ARCH_CLOCKMODES \ + VDSO_CLOCKMODE_ARCHTIMER + +#endif /* __ASM_VDSO_CSKY_CLOCKSOURCE_H */ diff --git a/arch/csky/include/asm/vdso/gettimeofday.h b/arch/csky/include/asm/vdso/gettimeofday.h new file mode 100644 index 000000000000..6c4f1446944f --- /dev/null +++ b/arch/csky/include/asm/vdso/gettimeofday.h @@ -0,0 +1,114 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_VDSO_CSKY_GETTIMEOFDAY_H +#define __ASM_VDSO_CSKY_GETTIMEOFDAY_H + +#ifndef __ASSEMBLY__ + +#include <asm/barrier.h> +#include <asm/unistd.h> +#include <abi/regdef.h> +#include <uapi/linux/time.h> + +#define VDSO_HAS_CLOCK_GETRES 1 + +static __always_inline +int gettimeofday_fallback(struct __kernel_old_timeval *_tv, + struct timezone *_tz) +{ + register struct __kernel_old_timeval *tv asm("a0") = _tv; + register struct timezone *tz asm("a1") = _tz; + register long ret asm("a0"); + register long nr asm(syscallid) = __NR_gettimeofday; + + asm volatile ("trap 0\n" + : "=r" (ret) + : "r"(tv), "r"(tz), "r"(nr) + : "memory"); + + return ret; +} + +static __always_inline +long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts) +{ + register clockid_t clkid asm("a0") = _clkid; + register struct __kernel_timespec *ts asm("a1") = _ts; + register long ret asm("a0"); + register long nr asm(syscallid) = __NR_clock_gettime64; + + asm volatile ("trap 0\n" + : "=r" (ret) + : "r"(clkid), "r"(ts), "r"(nr) + : "memory"); + + return ret; +} + +static __always_inline +long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + register clockid_t clkid asm("a0") = _clkid; + register struct old_timespec32 *ts asm("a1") = _ts; + register long ret asm("a0"); + register long nr asm(syscallid) = __NR_clock_gettime; + + asm volatile ("trap 0\n" + : "=r" (ret) + : "r"(clkid), "r"(ts), "r"(nr) + : "memory"); + + return ret; +} + +static __always_inline +int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts) +{ + register clockid_t clkid asm("a0") = _clkid; + register struct __kernel_timespec *ts asm("a1") = _ts; + register long ret asm("a0"); + register long nr asm(syscallid) = __NR_clock_getres_time64; + + asm volatile ("trap 0\n" + : "=r" (ret) + : "r"(clkid), "r"(ts), "r"(nr) + : "memory"); + + return ret; +} + +static __always_inline +int clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + register clockid_t clkid asm("a0") = _clkid; + register struct old_timespec32 *ts asm("a1") = _ts; + register long ret asm("a0"); + register long nr asm(syscallid) = __NR_clock_getres; + + asm volatile ("trap 0\n" + : "=r" (ret) + : "r"(clkid), "r"(ts), "r"(nr) + : "memory"); + + return ret; +} + +uint64_t csky_pmu_read_cc(void); +static __always_inline u64 __arch_get_hw_counter(s32 clock_mode, + const struct vdso_data *vd) +{ +#ifdef CONFIG_CSKY_PMU_V1 + return csky_pmu_read_cc(); +#else + return 0; +#endif +} + +static __always_inline const struct vdso_data *__arch_get_vdso_data(void) +{ + return _vdso_data; +} + +#endif /* !__ASSEMBLY__ */ + +#endif /* __ASM_VDSO_CSKY_GETTIMEOFDAY_H */ diff --git a/arch/csky/include/asm/vdso/processor.h b/arch/csky/include/asm/vdso/processor.h new file mode 100644 index 000000000000..39a6b561d0cc --- /dev/null +++ b/arch/csky/include/asm/vdso/processor.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_VDSO_CSKY_PROCESSOR_H +#define __ASM_VDSO_CSKY_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +#define cpu_relax() barrier() + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_VDSO_CSKY_PROCESSOR_H */ diff --git a/arch/csky/include/asm/vdso/vsyscall.h b/arch/csky/include/asm/vdso/vsyscall.h new file mode 100644 index 000000000000..c276211a7c4d --- /dev/null +++ b/arch/csky/include/asm/vdso/vsyscall.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_VDSO_CSKY_VSYSCALL_H +#define __ASM_VDSO_CSKY_VSYSCALL_H + +#ifndef __ASSEMBLY__ + +#include <vdso/datapage.h> + +extern struct vdso_data *vdso_data; + +static __always_inline struct vdso_data *__csky_get_k_vdso_data(void) +{ + return vdso_data; +} +#define __arch_get_k_vdso_data __csky_get_k_vdso_data + +#include <asm-generic/vdso/vsyscall.h> + +#endif /* !__ASSEMBLY__ */ + +#endif /* __ASM_VDSO_CSKY_VSYSCALL_H */ diff --git a/arch/csky/include/uapi/asm/byteorder.h b/arch/csky/include/uapi/asm/byteorder.h index d150cd664873..1aedd513b65a 100644 --- a/arch/csky/include/uapi/asm/byteorder.h +++ b/arch/csky/include/uapi/asm/byteorder.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_BYTEORDER_H #define __ASM_CSKY_BYTEORDER_H diff --git a/arch/csky/include/uapi/asm/perf_regs.h b/arch/csky/include/uapi/asm/perf_regs.h index 49d4e147a559..d0a8ac6a1b77 100644 --- a/arch/csky/include/uapi/asm/perf_regs.h +++ b/arch/csky/include/uapi/asm/perf_regs.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. #ifndef _ASM_CSKY_PERF_REGS_H #define _ASM_CSKY_PERF_REGS_H diff --git a/arch/csky/include/uapi/asm/ptrace.h b/arch/csky/include/uapi/asm/ptrace.h index 66b2268e324e..3be9c14334a6 100644 --- a/arch/csky/include/uapi/asm/ptrace.h +++ b/arch/csky/include/uapi/asm/ptrace.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef _CSKY_PTRACE_H #define _CSKY_PTRACE_H diff --git a/arch/csky/include/uapi/asm/sigcontext.h b/arch/csky/include/uapi/asm/sigcontext.h index 670c020f2cb8..859afb602477 100644 --- a/arch/csky/include/uapi/asm/sigcontext.h +++ b/arch/csky/include/uapi/asm/sigcontext.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_SIGCONTEXT_H #define __ASM_CSKY_SIGCONTEXT_H diff --git a/arch/csky/include/uapi/asm/unistd.h b/arch/csky/include/uapi/asm/unistd.h index ba4018929733..7ff6a2466af1 100644 --- a/arch/csky/include/uapi/asm/unistd.h +++ b/arch/csky/include/uapi/asm/unistd.h @@ -1,5 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #define __ARCH_WANT_STAT64 #define __ARCH_WANT_NEW_STAT diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile index 37f37c0e934a..6c0f36010ed0 100644 --- a/arch/csky/kernel/Makefile +++ b/arch/csky/kernel/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only extra-y := head.o vmlinux.lds -obj-y += entry.o atomic.o signal.o traps.o irq.o time.o vdso.o +obj-y += entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/ obj-y += power.o syscall.o syscall_table.o setup.o obj-y += process.o cpu-probe.o ptrace.o stacktrace.o obj-y += probes/ diff --git a/arch/csky/kernel/atomic.S b/arch/csky/kernel/atomic.S index 3821ef9b7567..e73e548f7855 100644 --- a/arch/csky/kernel/atomic.S +++ b/arch/csky/kernel/atomic.S @@ -14,6 +14,10 @@ */ ENTRY(csky_cmpxchg) USPTOKSP + + RD_MEH a3 + WR_MEH a3 + mfcr a3, epc addi a3, TRAP0_SIZE @@ -36,11 +40,11 @@ ENTRY(csky_cmpxchg) 2: sync.is #else -1: +GLOBAL(csky_cmpxchg_ldw) ldw a3, (a2) cmpne a0, a3 bt16 3f -2: +GLOBAL(csky_cmpxchg_stw) stw a1, (a2) 3: #endif @@ -55,19 +59,3 @@ ENTRY(csky_cmpxchg) KSPTOUSP rte END(csky_cmpxchg) - -#ifndef CONFIG_CPU_HAS_LDSTEX -/* - * Called from tlbmodified exception - */ -ENTRY(csky_cmpxchg_fixup) - mfcr a0, epc - lrw a1, 2b - cmpne a1, a0 - bt 1f - subi a1, (2b - 1b) - stw a1, (sp, LSAVE_PC) -1: - rts -END(csky_cmpxchg_fixup) -#endif diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S index 5a5cabd076e1..c1bd7a6b4ab6 100644 --- a/arch/csky/kernel/entry.S +++ b/arch/csky/kernel/entry.S @@ -13,10 +13,6 @@ #include <asm/page.h> #include <asm/thread_info.h> -#define PTE_INDX_MSK 0xffc -#define PTE_INDX_SHIFT 10 -#define _PGDIR_SHIFT 22 - .macro zero_fp #ifdef CONFIG_STACKTRACE movi r8, 0 @@ -41,108 +37,15 @@ #endif .endm -.macro tlbop_begin name, val0, val1, val2 -ENTRY(csky_\name) - mtcr a3, ss2 - mtcr r6, ss3 - mtcr a2, ss4 - - RD_PGDR r6 - RD_MEH a3 -#ifdef CONFIG_CPU_HAS_TLBI - tlbi.vaas a3 - sync.is - - btsti a3, 31 - bf 1f - RD_PGDR_K r6 -1: -#else - bgeni a2, 31 - WR_MCIR a2 - bgeni a2, 25 - WR_MCIR a2 -#endif - bclri r6, 0 - lrw a2, va_pa_offset - ld.w a2, (a2, 0) - subu r6, a2 - bseti r6, 31 - - mov a2, a3 - lsri a2, _PGDIR_SHIFT - lsli a2, 2 - addu r6, a2 - ldw r6, (r6) - - lrw a2, va_pa_offset - ld.w a2, (a2, 0) - subu r6, a2 - bseti r6, 31 - - lsri a3, PTE_INDX_SHIFT - lrw a2, PTE_INDX_MSK - and a3, a2 - addu r6, a3 - ldw a3, (r6) - - movi a2, (_PAGE_PRESENT | \val0) - and a3, a2 - cmpne a3, a2 - bt \name - - /* First read/write the page, just update the flags */ - ldw a3, (r6) - bgeni a2, PAGE_VALID_BIT - bseti a2, PAGE_ACCESSED_BIT - bseti a2, \val1 - bseti a2, \val2 - or a3, a2 - stw a3, (r6) - - /* Some cpu tlb-hardrefill bypass the cache */ -#ifdef CONFIG_CPU_NEED_TLBSYNC - movi a2, 0x22 - bseti a2, 6 - mtcr r6, cr22 - mtcr a2, cr17 - sync -#endif - - mfcr a3, ss2 - mfcr r6, ss3 - mfcr a2, ss4 - rte -\name: - mfcr a3, ss2 - mfcr r6, ss3 - mfcr a2, ss4 +.text +ENTRY(csky_pagefault) SAVE_ALL 0 -.endm -.macro tlbop_end is_write zero_fp context_tracking - RD_MEH a2 - psrset ee, ie + psrset ee mov a0, sp - movi a1, \is_write jbsr do_page_fault jmpi ret_from_exception -.endm - -.text - -tlbop_begin tlbinvalidl, _PAGE_READ, PAGE_VALID_BIT, PAGE_ACCESSED_BIT -tlbop_end 0 - -tlbop_begin tlbinvalids, _PAGE_WRITE, PAGE_DIRTY_BIT, PAGE_MODIFIED_BIT -tlbop_end 1 - -tlbop_begin tlbmodified, _PAGE_WRITE, PAGE_DIRTY_BIT, PAGE_MODIFIED_BIT -#ifndef CONFIG_CPU_HAS_LDSTEX -jbsr csky_cmpxchg_fixup -#endif -tlbop_end 1 ENTRY(csky_systemcall) SAVE_ALL TRAP0_SIZE @@ -314,6 +217,9 @@ ENTRY(csky_trap) ENTRY(csky_get_tls) USPTOKSP + RD_MEH a0 + WR_MEH a0 + /* increase epc for continue */ mfcr a0, epc addi a0, TRAP0_SIZE diff --git a/arch/csky/kernel/head.S b/arch/csky/kernel/head.S index 17ed9d250480..7e3e4f15b052 100644 --- a/arch/csky/kernel/head.S +++ b/arch/csky/kernel/head.S @@ -21,10 +21,16 @@ END(_start) ENTRY(_start_smp_secondary) SETUP_MMU - /* copy msa1 from CPU0 */ - lrw r6, secondary_msa1 +#ifdef CONFIG_PAGE_OFFSET_80000000 + lrw r6, secondary_msa1 ld.w r6, (r6, 0) mtcr r6, cr<31, 15> +#endif + + lrw r6, secondary_pgd + ld.w r6, (r6, 0) + mtcr r6, cr<28, 15> + mtcr r6, cr<29, 15> /* set stack point */ lrw r6, secondary_stack diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c index 1a29f1157449..e5f18420ce64 100644 --- a/arch/csky/kernel/perf_event.c +++ b/arch/csky/kernel/perf_event.c @@ -87,7 +87,7 @@ static int csky_pmu_irq; }) /* cycle counter */ -static uint64_t csky_pmu_read_cc(void) +uint64_t csky_pmu_read_cc(void) { uint32_t lo, hi, tmp; uint64_t result; @@ -1319,7 +1319,7 @@ int csky_pmu_device_probe(struct platform_device *pdev, pr_notice("[perf] PMU request irq fail!\n"); } - ret = cpuhp_setup_state(CPUHP_AP_PERF_ONLINE, "AP_PERF_ONLINE", + ret = cpuhp_setup_state(CPUHP_AP_PERF_CSKY_ONLINE, "AP_PERF_ONLINE", csky_pmu_starting_cpu, csky_pmu_dying_cpu); if (ret) { diff --git a/arch/csky/kernel/probes/simulate-insn.c b/arch/csky/kernel/probes/simulate-insn.c index 4e464fed52ec..d6e8d092c9b7 100644 --- a/arch/csky/kernel/probes/simulate-insn.c +++ b/arch/csky/kernel/probes/simulate-insn.c @@ -274,9 +274,9 @@ void __kprobes simulate_bnezad32(u32 opcode, long addr, struct pt_regs *regs) { unsigned long tmp = opcode & 0x1f; - unsigned long val; + long val; - csky_insn_reg_get_val(regs, tmp, &val); + csky_insn_reg_get_val(regs, tmp, (unsigned long *)&val); val -= 1; @@ -286,7 +286,7 @@ simulate_bnezad32(u32 opcode, long addr, struct pt_regs *regs) } else instruction_pointer_set(regs, addr + 4); - csky_insn_reg_set_val(regs, tmp, val); + csky_insn_reg_set_val(regs, tmp, (unsigned long)val); } void __kprobes @@ -297,13 +297,11 @@ simulate_bhsz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val >= 0) { + if ((long) val >= 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes @@ -314,13 +312,11 @@ simulate_bhz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val > 0) { + if ((long) val > 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes @@ -331,13 +327,11 @@ simulate_blsz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val <= 0) { + if ((long) val <= 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes @@ -348,13 +342,11 @@ simulate_blz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val < 0) { + if ((long) val < 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes diff --git a/arch/csky/kernel/ptrace.c b/arch/csky/kernel/ptrace.c index d822144906ac..0105ac81b432 100644 --- a/arch/csky/kernel/ptrace.c +++ b/arch/csky/kernel/ptrace.c @@ -22,6 +22,7 @@ #include <asm/asm-offsets.h> #include <abi/regdef.h> +#include <abi/ckmmu.h> #define CREATE_TRACE_POINTS #include <trace/events/syscalls.h> @@ -83,7 +84,7 @@ static int gpr_get(struct task_struct *target, /* Abiv1 regs->tls is fake and we need sync here. */ regs->tls = task_thread_info(target)->tp_value; - return membuf_write(&to, regs, sizeof(regs)); + return membuf_write(&to, regs, sizeof(*regs)); } static int gpr_set(struct task_struct *target, @@ -343,6 +344,124 @@ asmlinkage void syscall_trace_exit(struct pt_regs *regs) trace_sys_exit(regs, syscall_get_return_value(current, regs)); } +#ifdef CONFIG_CPU_CK860 +static void show_iutlb(void) +{ + int entry, i; + unsigned long flags; + unsigned long oldpid; + unsigned long entryhi[16], entrylo0[16], entrylo1[16]; + + oldpid = read_mmu_entryhi(); + + entry = 0x8000; + + local_irq_save(flags); + + for (i = 0; i < 16; i++) { + write_mmu_index(entry); + tlb_read(); + entryhi[i] = read_mmu_entryhi(); + entrylo0[i] = read_mmu_entrylo0(); + entrylo1[i] = read_mmu_entrylo1(); + + entry++; + } + + local_irq_restore(flags); + + write_mmu_entryhi(oldpid); + + printk("\n\n\n"); + for (i = 0; i < 16; i++) + printk("iutlb[%d]: entryhi - 0x%lx; entrylo0 - 0x%lx;" + " entrylo1 - 0x%lx\n", + i, entryhi[i], entrylo0[i], entrylo1[i]); + printk("\n\n\n"); +} + +static void show_dutlb(void) +{ + int entry, i; + unsigned long flags; + unsigned long oldpid; + unsigned long entryhi[16], entrylo0[16], entrylo1[16]; + + oldpid = read_mmu_entryhi(); + + entry = 0x4000; + + local_irq_save(flags); + + for (i = 0; i < 16; i++) { + write_mmu_index(entry); + tlb_read(); + entryhi[i] = read_mmu_entryhi(); + entrylo0[i] = read_mmu_entrylo0(); + entrylo1[i] = read_mmu_entrylo1(); + + entry++; + } + + local_irq_restore(flags); + + write_mmu_entryhi(oldpid); + + printk("\n\n\n"); + for (i = 0; i < 16; i++) + printk("dutlb[%d]: entryhi - 0x%lx; entrylo0 - 0x%lx;" + " entrylo1 - 0x%lx\n", + i, entryhi[i], entrylo0[i], entrylo1[i]); + printk("\n\n\n"); +} + +static unsigned long entryhi[1024], entrylo0[1024], entrylo1[1024]; +static void show_jtlb(void) +{ + int entry; + unsigned long flags; + unsigned long oldpid; + + oldpid = read_mmu_entryhi(); + + entry = 0; + + local_irq_save(flags); + while (entry < 1024) { + write_mmu_index(entry); + tlb_read(); + entryhi[entry] = read_mmu_entryhi(); + entrylo0[entry] = read_mmu_entrylo0(); + entrylo1[entry] = read_mmu_entrylo1(); + + entry++; + } + local_irq_restore(flags); + + write_mmu_entryhi(oldpid); + + printk("\n\n\n"); + + for (entry = 0; entry < 1024; entry++) + printk("jtlb[%x]: entryhi - 0x%lx; entrylo0 - 0x%lx;" + " entrylo1 - 0x%lx\n", + entry, entryhi[entry], entrylo0[entry], entrylo1[entry]); + printk("\n\n\n"); +} + +static void show_tlb(void) +{ + show_iutlb(); + show_dutlb(); + show_jtlb(); +} +#else +static void show_tlb(void) +{ + return; +} +#endif + void show_regs(struct pt_regs *fp) { pr_info("\nCURRENT PROCESS:\n\n"); @@ -363,9 +482,10 @@ void show_regs(struct pt_regs *fp) pr_info("PC: 0x%08lx (%pS)\n", (long)fp->pc, (void *)fp->pc); pr_info("LR: 0x%08lx (%pS)\n", (long)fp->lr, (void *)fp->lr); - pr_info("SP: 0x%08lx\n", (long)fp); - pr_info("orig_a0: 0x%08lx\n", fp->orig_a0); + pr_info("SP: 0x%08lx\n", (long)fp->usp); pr_info("PSR: 0x%08lx\n", (long)fp->sr); + pr_info("orig_a0: 0x%08lx\n", fp->orig_a0); + pr_info("PT_REGS: 0x%08lx\n", (long)fp); pr_info(" a0: 0x%08lx a1: 0x%08lx a2: 0x%08lx a3: 0x%08lx\n", fp->a0, fp->a1, fp->a2, fp->a3); @@ -395,5 +515,7 @@ void show_regs(struct pt_regs *fp) fp->regs[8], fp->regs[9]); #endif + show_tlb(); + return; } diff --git a/arch/csky/kernel/setup.c b/arch/csky/kernel/setup.c index e4cab16056d6..e93bc6f74432 100644 --- a/arch/csky/kernel/setup.c +++ b/arch/csky/kernel/setup.c @@ -45,13 +45,17 @@ static void __init csky_memblock_init(void) if (size >= lowmem_size) { max_low_pfn = min_low_pfn + lowmem_size; +#ifdef CONFIG_PAGE_OFFSET_80000000 write_mmu_msa1(read_mmu_msa0() + SSEG_SIZE); +#endif } else if (size > sseg_size) { max_low_pfn = min_low_pfn + sseg_size; } max_zone_pfn[ZONE_NORMAL] = max_low_pfn; + mmu_init(min_low_pfn, max_low_pfn); + #ifdef CONFIG_HIGHMEM max_zone_pfn[ZONE_HIGHMEM] = max_pfn; @@ -101,16 +105,26 @@ void __init setup_arch(char **cmdline_p) unsigned long va_pa_offset; EXPORT_SYMBOL(va_pa_offset); +static inline unsigned long read_mmu_msa(void) +{ +#ifdef CONFIG_PAGE_OFFSET_80000000 + return read_mmu_msa0(); +#endif + +#ifdef CONFIG_PAGE_OFFSET_A0000000 + return read_mmu_msa1(); +#endif +} + asmlinkage __visible void __init csky_start(unsigned int unused, void *dtb_start) { /* Clean up bss section */ memset(__bss_start, 0, __bss_stop - __bss_start); - va_pa_offset = read_mmu_msa0() & ~(SSEG_SIZE - 1); + va_pa_offset = read_mmu_msa() & ~(SSEG_SIZE - 1); pre_trap_init(); - pre_mmu_init(); if (dtb_start == NULL) early_init_dt_scan(__dtb_start); diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c index 37ea64ed3c12..312f046d452d 100644 --- a/arch/csky/kernel/signal.c +++ b/arch/csky/kernel/signal.c @@ -134,7 +134,6 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) { struct rt_sigframe *frame; int err = 0; - struct csky_vdso *vdso = current->mm->context.vdso; frame = get_sigframe(ksig, regs, sizeof(*frame)); if (!access_ok(frame, sizeof(*frame))) @@ -152,7 +151,8 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) return -EFAULT; /* Set up to return from userspace. */ - regs->lr = (unsigned long)(vdso->rt_signal_retcode); + regs->lr = (unsigned long)VDSO_SYMBOL( + current->mm->context.vdso, rt_sigreturn); /* * Set up registers for signal handler. diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c index 041d0de6a1b6..0f9f5eef9338 100644 --- a/arch/csky/kernel/smp.c +++ b/arch/csky/kernel/smp.c @@ -203,8 +203,8 @@ volatile unsigned int secondary_hint; volatile unsigned int secondary_hint2; volatile unsigned int secondary_ccr; volatile unsigned int secondary_stack; - -unsigned long secondary_msa1; +volatile unsigned int secondary_msa1; +volatile unsigned int secondary_pgd; int __cpu_up(unsigned int cpu, struct task_struct *tidle) { @@ -216,6 +216,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle) secondary_hint2 = mfcr("cr<21, 1>"); secondary_ccr = mfcr("cr18"); secondary_msa1 = read_mmu_msa1(); + secondary_pgd = mfcr("cr<29, 15>"); /* * Because other CPUs are in reset status, we must flush data @@ -262,8 +263,6 @@ void csky_start_secondary(void) flush_tlb_all(); write_mmu_pagemask(0); - TLBMISS_HANDLER_SETUP_PGD(swapper_pg_dir); - TLBMISS_HANDLER_SETUP_PGD_KERNEL(swapper_pg_dir); #ifdef CONFIG_CPU_HAS_FPU init_fpu(); diff --git a/arch/csky/kernel/traps.c b/arch/csky/kernel/traps.c index 959a917c989d..e5fbf8653a21 100644 --- a/arch/csky/kernel/traps.c +++ b/arch/csky/kernel/traps.c @@ -39,9 +39,7 @@ asmlinkage void csky_cmpxchg(void); asmlinkage void csky_get_tls(void); asmlinkage void csky_irq(void); -asmlinkage void csky_tlbinvalidl(void); -asmlinkage void csky_tlbinvalids(void); -asmlinkage void csky_tlbmodified(void); +asmlinkage void csky_pagefault(void); /* Defined in head.S */ asmlinkage void _start_smp_secondary(void); @@ -66,9 +64,9 @@ void __init trap_init(void) VEC_INIT(VEC_TRAP3, csky_get_tls); /* setup MMU TLB exception */ - VEC_INIT(VEC_TLBINVALIDL, csky_tlbinvalidl); - VEC_INIT(VEC_TLBINVALIDS, csky_tlbinvalids); - VEC_INIT(VEC_TLBMODIFIED, csky_tlbmodified); + VEC_INIT(VEC_TLBINVALIDL, csky_pagefault); + VEC_INIT(VEC_TLBINVALIDS, csky_pagefault); + VEC_INIT(VEC_TLBMODIFIED, csky_pagefault); #ifdef CONFIG_CPU_HAS_FPU init_fpu(); diff --git a/arch/csky/kernel/vdso.c b/arch/csky/kernel/vdso.c index abc3dbc658d4..16c20d64d165 100644 --- a/arch/csky/kernel/vdso.c +++ b/arch/csky/kernel/vdso.c @@ -1,86 +1,107 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. -#include <linux/kernel.h> -#include <linux/err.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/init.h> #include <linux/binfmts.h> #include <linux/elf.h> -#include <linux/vmalloc.h> -#include <linux/unistd.h> -#include <linux/uaccess.h> +#include <linux/err.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <asm/page.h> +#ifdef GENERIC_TIME_VSYSCALL +#include <vdso/datapage.h> +#else #include <asm/vdso.h> -#include <asm/cacheflush.h> +#endif -static struct page *vdso_page; +extern char vdso_start[], vdso_end[]; -static int __init init_vdso(void) -{ - struct csky_vdso *vdso; - int err = 0; - - vdso_page = alloc_page(GFP_KERNEL); - if (!vdso_page) - panic("Cannot allocate vdso"); +static unsigned int vdso_pages; +static struct page **vdso_pagelist; - vdso = vmap(&vdso_page, 1, 0, PAGE_KERNEL); - if (!vdso) - panic("Cannot map vdso"); +/* + * The vDSO data page. + */ +static union { + struct vdso_data data; + u8 page[PAGE_SIZE]; +} vdso_data_store __page_aligned_data; +struct vdso_data *vdso_data = &vdso_data_store.data; - clear_page(vdso); - - err = setup_vdso_page(vdso->rt_signal_retcode); - if (err) - panic("Cannot set signal return code, err: %x.", err); +static int __init vdso_init(void) +{ + unsigned int i; + + vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT; + vdso_pagelist = + kcalloc(vdso_pages + 1, sizeof(struct page *), GFP_KERNEL); + if (unlikely(vdso_pagelist == NULL)) { + pr_err("vdso: pagelist allocation failed\n"); + return -ENOMEM; + } - dcache_wb_range((unsigned long)vdso, (unsigned long)vdso + 16); + for (i = 0; i < vdso_pages; i++) { + struct page *pg; - vunmap(vdso); + pg = virt_to_page(vdso_start + (i << PAGE_SHIFT)); + vdso_pagelist[i] = pg; + } + vdso_pagelist[i] = virt_to_page(vdso_data); return 0; } -subsys_initcall(init_vdso); +arch_initcall(vdso_init); -int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) +int arch_setup_additional_pages(struct linux_binprm *bprm, + int uses_interp) { - int ret; - unsigned long addr; struct mm_struct *mm = current->mm; + unsigned long vdso_base, vdso_len; + int ret; - mmap_write_lock(mm); + vdso_len = (vdso_pages + 1) << PAGE_SHIFT; - addr = get_unmapped_area(NULL, STACK_TOP, PAGE_SIZE, 0, 0); - if (IS_ERR_VALUE(addr)) { - ret = addr; - goto up_fail; + mmap_write_lock(mm); + vdso_base = get_unmapped_area(NULL, 0, vdso_len, 0, 0); + if (IS_ERR_VALUE(vdso_base)) { + ret = vdso_base; + goto end; } - ret = install_special_mapping( - mm, - addr, - PAGE_SIZE, - VM_READ|VM_EXEC|VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, - &vdso_page); - if (ret) - goto up_fail; + /* + * Put vDSO base into mm struct. We need to do this before calling + * install_special_mapping or the perf counter mmap tracking code + * will fail to recognise it as a vDSO (since arch_vma_name fails). + */ + mm->context.vdso = (void *)vdso_base; + + ret = + install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT, + (VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC), + vdso_pagelist); + + if (unlikely(ret)) { + mm->context.vdso = NULL; + goto end; + } - mm->context.vdso = (void *)addr; + vdso_base += (vdso_pages << PAGE_SHIFT); + ret = install_special_mapping(mm, vdso_base, PAGE_SIZE, + (VM_READ | VM_MAYREAD), &vdso_pagelist[vdso_pages]); -up_fail: + if (unlikely(ret)) + mm->context.vdso = NULL; +end: mmap_write_unlock(mm); return ret; } const char *arch_vma_name(struct vm_area_struct *vma) { - if (vma->vm_mm == NULL) - return NULL; - - if (vma->vm_start == (long)vma->vm_mm->context.vdso) + if (vma->vm_mm && (vma->vm_start == (long)vma->vm_mm->context.vdso)) return "[vdso]"; - else - return NULL; + if (vma->vm_mm && (vma->vm_start == + (long)vma->vm_mm->context.vdso + PAGE_SIZE)) + return "[vdso_data]"; + return NULL; } diff --git a/arch/csky/kernel/vdso/.gitignore b/arch/csky/kernel/vdso/.gitignore new file mode 100644 index 000000000000..3a19def868ec --- /dev/null +++ b/arch/csky/kernel/vdso/.gitignore @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only +vdso.lds +*.tmp +vdso-syms.S diff --git a/arch/csky/kernel/vdso/Makefile b/arch/csky/kernel/vdso/Makefile new file mode 100644 index 000000000000..0b6909f10667 --- /dev/null +++ b/arch/csky/kernel/vdso/Makefile @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: GPL-2.0-only + +# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before +# the inclusion of generic Makefile. +ARCH_REL_TYPE_ABS := R_CKCORE_ADDR32|R_CKCORE_JUMP_SLOT +include $(srctree)/lib/vdso/Makefile + +# Symbols present in the vdso +vdso-syms += rt_sigreturn +vdso-syms += vgettimeofday + +# Files to link into the vdso +obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o + +ifneq ($(c-gettimeofday-y),) + CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y) +endif + +ccflags-y := -fno-stack-protector -DBUILD_VDSO32 + +# Build rules +targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o +obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) + +obj-y += vdso.o vdso-syms.o +CPPFLAGS_vdso.lds += -P -C -U$(ARCH) + +# Disable gcov profiling for VDSO code +GCOV_PROFILE := n +KCOV_INSTRUMENT := n + +# Force dependency +$(obj)/vdso.o: $(obj)/vdso.so + +SYSCFLAGS_vdso.so.dbg = $(c_flags) +$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) FORCE + $(call if_changed,vdsold) +SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \ + -Wl,--build-id=sha1 -Wl,--hash-style=both + +$(obj)/vdso-syms.S: $(obj)/vdso.so FORCE + $(call if_changed,so2s) + +# strip rule for the .so file +$(obj)/%.so: OBJCOPYFLAGS := -S +$(obj)/%.so: $(obj)/%.so.dbg FORCE + $(call if_changed,objcopy) + +# actual build commands +# The DSO images are built using a special linker script +# Make sure only to export the intended __vdso_xxx symbol offsets. +quiet_cmd_vdsold = VDSOLD $@ + cmd_vdsold = $(CC) $(KBUILD_CFLAGS) $(call cc-option, -no-pie) -nostdlib -nostartfiles $(SYSCFLAGS_$(@F)) \ + -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp && \ + $(CROSS_COMPILE)objcopy \ + $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \ + rm $@.tmp + +# Extracts symbol offsets from the VDSO, converting them into an assembly file +# that contains the same symbols at the same offsets. +quiet_cmd_so2s = SO2S $@ + cmd_so2s = $(NM) -D $< | $(srctree)/$(src)/so2s.sh > $@ + +# install commands for the unstripped file +quiet_cmd_vdso_install = INSTALL $@ + cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ + +vdso.so: $(obj)/vdso.so.dbg + @mkdir -p $(MODLIB)/vdso + $(call cmd,vdso_install) + +vdso_install: vdso.so diff --git a/arch/csky/kernel/vdso/note.S b/arch/csky/kernel/vdso/note.S new file mode 100644 index 000000000000..2a956c942211 --- /dev/null +++ b/arch/csky/kernel/vdso/note.S @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text. + * Here we can supply some information useful to userland. + */ + +#include <linux/elfnote.h> +#include <linux/version.h> + +ELFNOTE_START(Linux, 0, "a") + .long LINUX_VERSION_CODE +ELFNOTE_END diff --git a/arch/csky/kernel/vdso/rt_sigreturn.S b/arch/csky/kernel/vdso/rt_sigreturn.S new file mode 100644 index 000000000000..0a6bd1216118 --- /dev/null +++ b/arch/csky/kernel/vdso/rt_sigreturn.S @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <linux/linkage.h> +#include <asm/unistd.h> +#include <abi/vdso.h> + + .text +ENTRY(__vdso_rt_sigreturn) + .cfi_startproc + .cfi_signal_frame + SET_SYSCALL_ID + trap 0 + .cfi_endproc +ENDPROC(__vdso_rt_sigreturn) diff --git a/arch/csky/kernel/vdso/so2s.sh b/arch/csky/kernel/vdso/so2s.sh new file mode 100755 index 000000000000..69da3d529c6d --- /dev/null +++ b/arch/csky/kernel/vdso/so2s.sh @@ -0,0 +1,5 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0+ + +sed 's!\([0-9a-f]*\) T \([a-z0-9_]*\)\(@@LINUX_5.10\)*!.global \2\n.set \2,0x\1!' \ +| grep '^\.' diff --git a/arch/csky/kernel/vdso/vdso.S b/arch/csky/kernel/vdso/vdso.S new file mode 100644 index 000000000000..5162ca069494 --- /dev/null +++ b/arch/csky/kernel/vdso/vdso.S @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <linux/init.h> +#include <linux/linkage.h> +#include <asm/page.h> + + __PAGE_ALIGNED_DATA + + .globl vdso_start, vdso_end + .balign PAGE_SIZE +vdso_start: + .incbin "arch/csky/kernel/vdso/vdso.so" + .balign PAGE_SIZE +vdso_end: + + .previous diff --git a/arch/csky/kernel/vdso/vdso.lds.S b/arch/csky/kernel/vdso/vdso.lds.S new file mode 100644 index 000000000000..590a6c79fff7 --- /dev/null +++ b/arch/csky/kernel/vdso/vdso.lds.S @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <asm/page.h> + +OUTPUT_ARCH(csky) + +SECTIONS +{ + PROVIDE(_vdso_data = . + PAGE_SIZE); + . = SIZEOF_HEADERS; + + .hash : { *(.hash) } :text + .gnu.hash : { *(.gnu.hash) } + .dynsym : { *(.dynsym) } + .dynstr : { *(.dynstr) } + .gnu.version : { *(.gnu.version) } + .gnu.version_d : { *(.gnu.version_d) } + .gnu.version_r : { *(.gnu.version_r) } + + .note : { *(.note.*) } :text :note + .dynamic : { *(.dynamic) } :text :dynamic + + .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr + .eh_frame : { KEEP (*(.eh_frame)) } :text + + .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } + + . = 0x800; + .text : { *(.text .text.*) } :text + + .data : { + *(.got.plt) *(.got) + *(.data .data.* .gnu.linkonce.d.*) + *(.dynbss) + *(.bss .bss.* .gnu.linkonce.b.*) + } +} + +PHDRS +{ + text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ + dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ + note PT_NOTE FLAGS(4); /* PF_R */ + eh_frame_hdr PT_GNU_EH_FRAME; +} + +VERSION +{ + LINUX_5.10 { + global: + __vdso_rt_sigreturn; + __vdso_clock_gettime; + __vdso_clock_gettime64; + __vdso_gettimeofday; + __vdso_clock_getres; + local: *; + }; +} diff --git a/arch/csky/kernel/vdso/vgettimeofday.c b/arch/csky/kernel/vdso/vgettimeofday.c new file mode 100644 index 000000000000..da491832c098 --- /dev/null +++ b/arch/csky/kernel/vdso/vgettimeofday.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/time.h> +#include <linux/types.h> + +int __vdso_clock_gettime(clockid_t clock, + struct old_timespec32 *ts) +{ + return __cvdso_clock_gettime32(clock, ts); +} + +int __vdso_clock_gettime64(clockid_t clock, + struct __kernel_timespec *ts) +{ + return __cvdso_clock_gettime(clock, ts); +} + +int __vdso_gettimeofday(struct __kernel_old_timeval *tv, + struct timezone *tz) +{ + return __cvdso_gettimeofday(tv, tz); +} + +int __vdso_clock_getres(clockid_t clock_id, + struct old_timespec32 *res) +{ + return __cvdso_clock_getres_time32(clock_id, res); +} diff --git a/arch/csky/kernel/vmlinux.lds.S b/arch/csky/kernel/vmlinux.lds.S index f03033e17c29..e8b1a4a49798 100644 --- a/arch/csky/kernel/vmlinux.lds.S +++ b/arch/csky/kernel/vmlinux.lds.S @@ -33,6 +33,7 @@ SECTIONS .text : AT(ADDR(.text) - LOAD_OFFSET) { _text = .; + VBR_BASE IRQENTRY_TEXT SOFTIRQENTRY_TEXT TEXT_TEXT @@ -104,7 +105,6 @@ SECTIONS EXCEPTION_TABLE(L1_CACHE_BYTES) BSS_SECTION(L1_CACHE_BYTES, PAGE_SIZE, L1_CACHE_BYTES) - VBR_BASE _end = . ; STABS_DEBUG diff --git a/arch/csky/mm/fault.c b/arch/csky/mm/fault.c index 081b178b41b1..1482de56f4f7 100644 --- a/arch/csky/mm/fault.c +++ b/arch/csky/mm/fault.c @@ -1,29 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. -#include <linux/signal.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/types.h> -#include <linux/ptrace.h> -#include <linux/mman.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/version.h> -#include <linux/vt_kern.h> #include <linux/extable.h> -#include <linux/uaccess.h> -#include <linux/perf_event.h> #include <linux/kprobes.h> - -#include <asm/hardirq.h> -#include <asm/mmu_context.h> -#include <asm/traps.h> -#include <asm/page.h> +#include <linux/mmu_context.h> +#include <linux/perf_event.h> int fixup_exception(struct pt_regs *regs) { @@ -39,180 +20,287 @@ int fixup_exception(struct pt_regs *regs) return 0; } -/* - * This routine handles page faults. It determines the address, - * and the problem, and then passes it off to one of the appropriate - * routines. - */ -asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write, - unsigned long mmu_meh) +static inline bool is_write(struct pt_regs *regs) { - struct vm_area_struct *vma = NULL; - struct task_struct *tsk = current; - struct mm_struct *mm = tsk->mm; - int si_code; - int fault; - unsigned long address = mmu_meh & PAGE_MASK; + switch (trap_no(regs)) { + case VEC_TLBINVALIDS: + return true; + case VEC_TLBMODIFIED: + return true; + } - if (kprobe_page_fault(regs, tsk->thread.trap_no)) + return false; +} + +#ifdef CONFIG_CPU_HAS_LDSTEX +static inline void csky_cmpxchg_fixup(struct pt_regs *regs) +{ + return; +} +#else +extern unsigned long csky_cmpxchg_ldw; +extern unsigned long csky_cmpxchg_stw; +static inline void csky_cmpxchg_fixup(struct pt_regs *regs) +{ + if (trap_no(regs) != VEC_TLBMODIFIED) return; - si_code = SEGV_MAPERR; + if (instruction_pointer(regs) == csky_cmpxchg_stw) + instruction_pointer_set(regs, csky_cmpxchg_ldw); + return; +} +#endif + +static inline void no_context(struct pt_regs *regs, unsigned long addr) +{ + current->thread.trap_no = trap_no(regs); + + /* Are we prepared to handle this kernel fault? */ + if (fixup_exception(regs)) + return; -#ifndef CONFIG_CPU_HAS_TLBI /* - * We fault-in kernel-space virtual memory on-demand. The - * 'reference' page table is init_mm.pgd. - * - * NOTE! We MUST NOT take any locks for this case. We may - * be in an interrupt or a critical region, and should - * only copy the information from the master page table, - * nothing more. + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. */ - if (unlikely(address >= VMALLOC_START) && - unlikely(address <= VMALLOC_END)) { - /* - * Synchronize this task's top level page-table - * with the 'reference' page table. - * - * Do _not_ use "tsk" here. We might be inside - * an interrupt in the middle of a task switch.. - */ - int offset = pgd_index(address); - pgd_t *pgd, *pgd_k; - pud_t *pud, *pud_k; - pmd_t *pmd, *pmd_k; - pte_t *pte_k; + bust_spinlocks(1); + pr_alert("Unable to handle kernel paging request at virtual " + "addr 0x%08lx, pc: 0x%08lx\n", addr, regs->pc); + die(regs, "Oops"); + do_exit(SIGKILL); +} - unsigned long pgd_base; +static inline void mm_fault_error(struct pt_regs *regs, unsigned long addr, vm_fault_t fault) +{ + current->thread.trap_no = trap_no(regs); - pgd_base = (unsigned long)__va(get_pgd()); - pgd = (pgd_t *)pgd_base + offset; - pgd_k = init_mm.pgd + offset; + if (fault & VM_FAULT_OOM) { + /* + * We ran out of memory, call the OOM killer, and return the userspace + * (which will retry the fault, or kill us if we got oom-killed). + */ + if (!user_mode(regs)) { + no_context(regs, addr); + return; + } + pagefault_out_of_memory(); + return; + } else if (fault & VM_FAULT_SIGBUS) { + /* Kernel mode? Handle exceptions or die */ + if (!user_mode(regs)) { + no_context(regs, addr); + return; + } + do_trap(regs, SIGBUS, BUS_ADRERR, addr); + return; + } + BUG(); +} - if (!pgd_present(*pgd_k)) - goto no_context; - set_pgd(pgd, *pgd_k); +static inline void bad_area(struct pt_regs *regs, struct mm_struct *mm, int code, unsigned long addr) +{ + /* + * Something tried to access memory that isn't in our memory map. + * Fix it, but check if it's kernel or user first. + */ + mmap_read_unlock(mm); + /* User mode accesses just cause a SIGSEGV */ + if (user_mode(regs)) { + do_trap(regs, SIGSEGV, code, addr); + return; + } - pud = (pud_t *)pgd; - pud_k = (pud_t *)pgd_k; - if (!pud_present(*pud_k)) - goto no_context; + no_context(regs, addr); +} - pmd = pmd_offset(pud, address); - pmd_k = pmd_offset(pud_k, address); - if (!pmd_present(*pmd_k)) - goto no_context; - set_pmd(pmd, *pmd_k); +static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long addr) +{ + pgd_t *pgd, *pgd_k; + pud_t *pud, *pud_k; + pmd_t *pmd, *pmd_k; + pte_t *pte_k; + int offset; - pte_k = pte_offset_kernel(pmd_k, address); - if (!pte_present(*pte_k)) - goto no_context; + /* User mode accesses just cause a SIGSEGV */ + if (user_mode(regs)) { + do_trap(regs, SIGSEGV, code, addr); return; } -#endif - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); /* - * If we're in an interrupt or have no user - * context, we must not take the fault.. + * Synchronize this task's top level page-table + * with the 'reference' page table. + * + * Do _not_ use "tsk" here. We might be inside + * an interrupt in the middle of a task switch.. */ - if (in_atomic() || !mm) - goto bad_area_nosemaphore; + offset = pgd_index(addr); - mmap_read_lock(mm); - vma = find_vma(mm, address); - if (!vma) - goto bad_area; - if (vma->vm_start <= address) - goto good_area; - if (!(vma->vm_flags & VM_GROWSDOWN)) - goto bad_area; - if (expand_stack(vma, address)) - goto bad_area; - /* - * Ok, we have a good vm_area for this memory access, so - * we can handle it.. - */ -good_area: - si_code = SEGV_ACCERR; + pgd = get_pgd() + offset; + pgd_k = init_mm.pgd + offset; - if (write) { + if (!pgd_present(*pgd_k)) { + no_context(regs, addr); + return; + } + set_pgd(pgd, *pgd_k); + + pud = (pud_t *)pgd; + pud_k = (pud_t *)pgd_k; + if (!pud_present(*pud_k)) { + no_context(regs, addr); + return; + } + + pmd = pmd_offset(pud, addr); + pmd_k = pmd_offset(pud_k, addr); + if (!pmd_present(*pmd_k)) { + no_context(regs, addr); + return; + } + set_pmd(pmd, *pmd_k); + + pte_k = pte_offset_kernel(pmd_k, addr); + if (!pte_present(*pte_k)) { + no_context(regs, addr); + return; + } + + flush_tlb_one(addr); +} + +static inline bool access_error(struct pt_regs *regs, struct vm_area_struct *vma) +{ + if (is_write(regs)) { if (!(vma->vm_flags & VM_WRITE)) - goto bad_area; + return true; } else { if (unlikely(!vma_is_accessible(vma))) - goto bad_area; + return true; } + return false; +} + +/* + * This routine handles page faults. It determines the address and the + * problem, and then passes it off to one of the appropriate routines. + */ +asmlinkage void do_page_fault(struct pt_regs *regs) +{ + struct task_struct *tsk; + struct vm_area_struct *vma; + struct mm_struct *mm; + unsigned long addr = read_mmu_entryhi() & PAGE_MASK; + unsigned int flags = FAULT_FLAG_DEFAULT; + int code = SEGV_MAPERR; + vm_fault_t fault; + + tsk = current; + mm = tsk->mm; + + csky_cmpxchg_fixup(regs); + + if (kprobe_page_fault(regs, tsk->thread.trap_no)) + return; /* - * If for any reason at all we couldn't handle the fault, - * make sure we exit gracefully rather than endlessly redo - * the fault. + * Fault-in kernel-space virtual memory on-demand. + * The 'reference' page table is init_mm.pgd. + * + * NOTE! We MUST NOT take any locks for this case. We may + * be in an interrupt or a critical region, and should + * only copy the information from the master page table, + * nothing more. */ - fault = handle_mm_fault(vma, address, write ? FAULT_FLAG_WRITE : 0, - regs); - if (unlikely(fault & VM_FAULT_ERROR)) { - if (fault & VM_FAULT_OOM) - goto out_of_memory; - else if (fault & VM_FAULT_SIGBUS) - goto do_sigbus; - else if (fault & VM_FAULT_SIGSEGV) - goto bad_area; - BUG(); + if (unlikely((addr >= VMALLOC_START) && (addr <= VMALLOC_END))) { + vmalloc_fault(regs, code, addr); + return; } - mmap_read_unlock(mm); - return; + + /* Enable interrupts if they were enabled in the parent context. */ + if (likely(regs->sr & BIT(6))) + local_irq_enable(); /* - * Something tried to access memory that isn't in our memory map.. - * Fix it, but check if it's kernel or user first.. + * If we're in an interrupt, have no user context, or are running + * in an atomic region, then we must not take the fault. */ -bad_area: - mmap_read_unlock(mm); - -bad_area_nosemaphore: - /* User mode accesses just cause a SIGSEGV */ - if (user_mode(regs)) { - tsk->thread.trap_no = trap_no(regs); - force_sig_fault(SIGSEGV, si_code, (void __user *)address); + if (unlikely(faulthandler_disabled() || !mm)) { + no_context(regs, addr); return; } -no_context: - tsk->thread.trap_no = trap_no(regs); + if (user_mode(regs)) + flags |= FAULT_FLAG_USER; - /* Are we prepared to handle this kernel fault? */ - if (fixup_exception(regs)) + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr); + + if (is_write(regs)) + flags |= FAULT_FLAG_WRITE; +retry: + mmap_read_lock(mm); + vma = find_vma(mm, addr); + if (unlikely(!vma)) { + bad_area(regs, mm, code, addr); + return; + } + if (likely(vma->vm_start <= addr)) + goto good_area; + if (unlikely(!(vma->vm_flags & VM_GROWSDOWN))) { + bad_area(regs, mm, code, addr); return; + } + if (unlikely(expand_stack(vma, addr))) { + bad_area(regs, mm, code, addr); + return; + } /* - * Oops. The kernel tried to access some bad page. We'll have to - * terminate things with extreme prejudice. + * Ok, we have a good vm_area for this memory access, so + * we can handle it. */ - bust_spinlocks(1); - pr_alert("Unable to handle kernel paging request at virtual " - "address 0x%08lx, pc: 0x%08lx\n", address, regs->pc); - die(regs, "Oops"); +good_area: + code = SEGV_ACCERR; + + if (unlikely(access_error(regs, vma))) { + bad_area(regs, mm, code, addr); + return; + } -out_of_memory: - tsk->thread.trap_no = trap_no(regs); + /* + * If for any reason at all we could not handle the fault, + * make sure we exit gracefully rather than endlessly redo + * the fault. + */ + fault = handle_mm_fault(vma, addr, flags, regs); /* - * We ran out of memory, call the OOM killer, and return the userspace - * (which will retry the fault, or kill us if we got oom-killed). + * If we need to retry but a fatal signal is pending, handle the + * signal first. We do not need to release the mmap_lock because it + * would already be released in __lock_page_or_retry in mm/filemap.c. */ - pagefault_out_of_memory(); - return; + if (fault_signal_pending(fault, regs)) { + if (!user_mode(regs)) + no_context(regs, addr); + return; + } -do_sigbus: - tsk->thread.trap_no = trap_no(regs); + if (unlikely((fault & VM_FAULT_RETRY) && (flags & FAULT_FLAG_ALLOW_RETRY))) { + flags |= FAULT_FLAG_TRIED; - mmap_read_unlock(mm); + /* + * No need to mmap_read_unlock(mm) as we would + * have already released it in __lock_page_or_retry + * in mm/filemap.c. + */ + goto retry; + } - /* Kernel mode? Handle exceptions or die */ - if (!user_mode(regs)) - goto no_context; + mmap_read_unlock(mm); - force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address); + if (unlikely(fault & VM_FAULT_ERROR)) { + mm_fault_error(regs, addr, fault); + return; + } + return; } diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c index af627128314f..894050a8ce09 100644 --- a/arch/csky/mm/init.c +++ b/arch/csky/mm/init.c @@ -28,9 +28,15 @@ #include <asm/mmu_context.h> #include <asm/sections.h> #include <asm/tlb.h> +#include <asm/cacheflush.h> + +#define PTRS_KERN_TABLE \ + ((PTRS_PER_PGD - USER_PTRS_PER_PGD) * PTRS_PER_PTE) pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_bss; pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned_bss; +pte_t kernel_pte_tables[PTRS_KERN_TABLE] __page_aligned_bss; + EXPORT_SYMBOL(invalid_pte_table); unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss; @@ -80,9 +86,9 @@ void __init mem_init(void) #ifdef CONFIG_HIGHMEM unsigned long tmp; - max_mapnr = highend_pfn; + set_max_mapnr(highend_pfn - ARCH_PFN_OFFSET); #else - max_mapnr = max_low_pfn; + set_max_mapnr(max_low_pfn - ARCH_PFN_OFFSET); #endif high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); @@ -104,24 +110,9 @@ void __init mem_init(void) mem_init_print_info(NULL); } -extern char __init_begin[], __init_end[]; - void free_initmem(void) { - unsigned long addr; - - addr = (unsigned long) &__init_begin; - - while (addr < (unsigned long) &__init_end) { - ClearPageReserved(virt_to_page(addr)); - init_page_count(virt_to_page(addr)); - free_page(addr); - totalram_pages_inc(); - addr += PAGE_SIZE; - } - - pr_info("Freeing unused kernel memory: %dk freed\n", - ((unsigned int)&__init_end - (unsigned int)&__init_begin) >> 10); + free_initmem_default(-1); } void pgd_init(unsigned long *p) @@ -130,20 +121,35 @@ void pgd_init(unsigned long *p) for (i = 0; i < PTRS_PER_PGD; i++) p[i] = __pa(invalid_pte_table); + + flush_tlb_all(); + local_icache_inv_all(NULL); } -void __init pre_mmu_init(void) +void __init mmu_init(unsigned long min_pfn, unsigned long max_pfn) { - /* - * Setup page-table and enable TLB-hardrefill - */ + int i; + + for (i = 0; i < USER_PTRS_PER_PGD; i++) + swapper_pg_dir[i].pgd = __pa(invalid_pte_table); + + for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) + swapper_pg_dir[i].pgd = + __pa(kernel_pte_tables + (PTRS_PER_PTE * (i - USER_PTRS_PER_PGD))); + + for (i = 0; i < PTRS_KERN_TABLE; i++) + set_pte(&kernel_pte_tables[i], __pte(_PAGE_GLOBAL)); + + for (i = min_pfn; i < max_pfn; i++) + set_pte(&kernel_pte_tables[i - PFN_DOWN(va_pa_offset)], pfn_pte(i, PAGE_KERNEL)); + flush_tlb_all(); - pgd_init((unsigned long *)swapper_pg_dir); - TLBMISS_HANDLER_SETUP_PGD(swapper_pg_dir); - TLBMISS_HANDLER_SETUP_PGD_KERNEL(swapper_pg_dir); + local_icache_inv_all(NULL); /* Setup page mask to 4k */ write_mmu_pagemask(0); + + setup_pgd(swapper_pg_dir, 0); } void __init fixrange_init(unsigned long start, unsigned long end, diff --git a/arch/csky/mm/tlb.c b/arch/csky/mm/tlb.c index ed1512381112..9234c5e5ceaf 100644 --- a/arch/csky/mm/tlb.c +++ b/arch/csky/mm/tlb.c @@ -24,7 +24,13 @@ void flush_tlb_all(void) void flush_tlb_mm(struct mm_struct *mm) { #ifdef CONFIG_CPU_HAS_TLBI - asm volatile("tlbi.asids %0"::"r"(cpu_asid(mm))); + sync_is(); + asm volatile( + "tlbi.asids %0 \n" + "sync.i \n" + : + : "r" (cpu_asid(mm)) + : "memory"); #else tlb_invalid_all(); #endif @@ -53,11 +59,17 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, end &= TLB_ENTRY_SIZE_MASK; #ifdef CONFIG_CPU_HAS_TLBI + sync_is(); while (start < end) { - asm volatile("tlbi.vas %0"::"r"(start | newpid)); + asm volatile( + "tlbi.vas %0 \n" + : + : "r" (start | newpid) + : "memory"); + start += 2*PAGE_SIZE; } - sync_is(); + asm volatile("sync.i\n"); #else { unsigned long flags, oldpid; @@ -87,11 +99,17 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end) end &= TLB_ENTRY_SIZE_MASK; #ifdef CONFIG_CPU_HAS_TLBI + sync_is(); while (start < end) { - asm volatile("tlbi.vaas %0"::"r"(start)); + asm volatile( + "tlbi.vaas %0 \n" + : + : "r" (start) + : "memory"); + start += 2*PAGE_SIZE; } - sync_is(); + asm volatile("sync.i\n"); #else { unsigned long flags, oldpid; @@ -121,8 +139,13 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) addr &= TLB_ENTRY_SIZE_MASK; #ifdef CONFIG_CPU_HAS_TLBI - asm volatile("tlbi.vas %0"::"r"(addr | newpid)); sync_is(); + asm volatile( + "tlbi.vas %0 \n" + "sync.i \n" + : + : "r" (addr | newpid) + : "memory"); #else { int oldpid, idx; @@ -147,8 +170,13 @@ void flush_tlb_one(unsigned long addr) addr &= TLB_ENTRY_SIZE_MASK; #ifdef CONFIG_CPU_HAS_TLBI - asm volatile("tlbi.vaas %0"::"r"(addr)); sync_is(); + asm volatile( + "tlbi.vaas %0 \n" + "sync.i \n" + : + : "r" (addr) + : "memory"); #else { int oldpid, idx; |