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-rw-r--r--arch/powerpc/Kconfig9
-rw-r--r--arch/powerpc/include/asm/kexec.h98
-rw-r--r--arch/powerpc/kernel/prom.c2
-rw-r--r--arch/powerpc/kernel/setup-common.c2
-rw-r--r--arch/powerpc/kernel/smp.c4
-rw-r--r--arch/powerpc/kexec/Makefile3
-rw-r--r--arch/powerpc/kexec/core.c4
-rw-r--r--arch/powerpc/kexec/elf_64.c4
-rw-r--r--arch/powerpc/kexec/file_load_64.c269
-rw-r--r--arch/powerpc/mm/book3s32/mmu.c7
-rw-r--r--arch/powerpc/mm/mmu_decl.h8
-rw-r--r--arch/powerpc/mm/nohash/8xx.c33
-rw-r--r--arch/powerpc/mm/nohash/e500.c10
-rw-r--r--arch/powerpc/mm/pgtable_32.c38
-rw-r--r--arch/powerpc/platforms/powernv/smp.c2
-rw-r--r--include/linux/crash_core.h12
16 files changed, 274 insertions, 231 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a68b9e637eda..1c4be3373686 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -607,11 +607,6 @@ config PPC64_SUPPORTS_MEMORY_FAILURE
config ARCH_SUPPORTS_KEXEC
def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
-config ARCH_SELECTS_KEXEC
- def_bool y
- depends on KEXEC
- select CRASH_DUMP
-
config ARCH_SUPPORTS_KEXEC_FILE
def_bool PPC64
@@ -622,7 +617,6 @@ config ARCH_SELECTS_KEXEC_FILE
def_bool y
depends on KEXEC_FILE
select KEXEC_ELF
- select CRASH_DUMP
select HAVE_IMA_KEXEC if IMA
config PPC64_BIG_ENDIAN_ELF_ABI_V2
@@ -694,8 +688,7 @@ config ARCH_SELECTS_CRASH_DUMP
config FA_DUMP
bool "Firmware-assisted dump"
- depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
- select CRASH_DUMP
+ depends on CRASH_DUMP && PPC64 && (PPC_RTAS || PPC_POWERNV)
help
A robust mechanism to get reliable kernel crash dump with
assistance from firmware. This approach does not use kexec,
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index e1b43aa12175..fdb90e24dc74 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -55,59 +55,18 @@
typedef void (*crash_shutdown_t)(void);
#ifdef CONFIG_KEXEC_CORE
-
-/*
- * This function is responsible for capturing register states if coming
- * via panic or invoking dump using sysrq-trigger.
- */
-static inline void crash_setup_regs(struct pt_regs *newregs,
- struct pt_regs *oldregs)
-{
- if (oldregs)
- memcpy(newregs, oldregs, sizeof(*newregs));
- else
- ppc_save_regs(newregs);
-}
+struct kimage;
+struct pt_regs;
extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
master to copy new code to 0 */
-extern int crashing_cpu;
-extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
-extern void crash_ipi_callback(struct pt_regs *);
-extern int crash_wake_offline;
-
-struct kimage;
-struct pt_regs;
extern void default_machine_kexec(struct kimage *image);
-extern void default_machine_crash_shutdown(struct pt_regs *regs);
-extern int crash_shutdown_register(crash_shutdown_t handler);
-extern int crash_shutdown_unregister(crash_shutdown_t handler);
-
-extern void crash_kexec_prepare(void);
-extern void crash_kexec_secondary(struct pt_regs *regs);
-int __init overlaps_crashkernel(unsigned long start, unsigned long size);
-extern void reserve_crashkernel(void);
extern void machine_kexec_mask_interrupts(void);
-static inline bool kdump_in_progress(void)
-{
- return crashing_cpu >= 0;
-}
-
void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_code_buffer,
unsigned long start_address) __noreturn;
-
void kexec_copy_flush(struct kimage *image);
-#if defined(CONFIG_CRASH_DUMP)
-bool is_kdump_kernel(void);
-#define is_kdump_kernel is_kdump_kernel
-#if defined(CONFIG_PPC_RTAS)
-void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
-#define crash_free_reserved_phys_range crash_free_reserved_phys_range
-#endif /* CONFIG_PPC_RTAS */
-#endif /* CONFIG_CRASH_DUMP */
-
#ifdef CONFIG_KEXEC_FILE
extern const struct kexec_file_ops kexec_elf64_ops;
@@ -152,15 +111,56 @@ int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
#endif /* CONFIG_KEXEC_FILE */
-#else /* !CONFIG_KEXEC_CORE */
-static inline void crash_kexec_secondary(struct pt_regs *regs) { }
+#endif /* CONFIG_KEXEC_CORE */
+
+#ifdef CONFIG_CRASH_RESERVE
+int __init overlaps_crashkernel(unsigned long start, unsigned long size);
+extern void reserve_crashkernel(void);
+#else
+static inline void reserve_crashkernel(void) {}
+static inline int overlaps_crashkernel(unsigned long start, unsigned long size) { return 0; }
+#endif
-static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
+#if defined(CONFIG_CRASH_DUMP)
+/*
+ * This function is responsible for capturing register states if coming
+ * via panic or invoking dump using sysrq-trigger.
+ */
+static inline void crash_setup_regs(struct pt_regs *newregs,
+ struct pt_regs *oldregs)
{
- return 0;
+ if (oldregs)
+ memcpy(newregs, oldregs, sizeof(*newregs));
+ else
+ ppc_save_regs(newregs);
+}
+
+extern int crashing_cpu;
+extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
+extern void crash_ipi_callback(struct pt_regs *regs);
+extern int crash_wake_offline;
+
+extern int crash_shutdown_register(crash_shutdown_t handler);
+extern int crash_shutdown_unregister(crash_shutdown_t handler);
+extern void default_machine_crash_shutdown(struct pt_regs *regs);
+
+extern void crash_kexec_prepare(void);
+extern void crash_kexec_secondary(struct pt_regs *regs);
+
+static inline bool kdump_in_progress(void)
+{
+ return crashing_cpu >= 0;
}
-static inline void reserve_crashkernel(void) { ; }
+bool is_kdump_kernel(void);
+#define is_kdump_kernel is_kdump_kernel
+#if defined(CONFIG_PPC_RTAS)
+void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);
+#define crash_free_reserved_phys_range crash_free_reserved_phys_range
+#endif /* CONFIG_PPC_RTAS */
+
+#else /* !CONFIG_CRASH_DUMP */
+static inline void crash_kexec_secondary(struct pt_regs *regs) { }
static inline int crash_shutdown_register(crash_shutdown_t handler)
{
@@ -183,7 +183,7 @@ static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
{
}
-#endif /* CONFIG_KEXEC_CORE */
+#endif /* CONFIG_CRASH_DUMP */
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/kexec.h>
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1dc32a058156..cd8d8883de90 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -475,7 +475,7 @@ static int __init early_init_dt_scan_chosen_ppc(unsigned long node,
tce_alloc_end = *lprop;
#endif
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_CRASH_RESERVE
lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL);
if (lprop)
crashk_res.start = *lprop;
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 2add292da494..01ed1263e1a9 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -110,7 +110,7 @@ int ppc_do_canonicalize_irqs;
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
#endif
-#ifdef CONFIG_VMCORE_INFO
+#ifdef CONFIG_CRASH_DUMP
/* This keeps a track of which one is the crashing cpu. */
int crashing_cpu = -1;
#endif
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a60e4139214b..12e53b3d7923 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -588,7 +588,7 @@ void smp_send_debugger_break(void)
}
#endif
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_CRASH_DUMP
void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
{
int cpu;
@@ -631,7 +631,7 @@ void crash_smp_send_stop(void)
stopped = true;
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_CRASH_DUMP
if (kexec_crash_image) {
crash_kexec_prepare();
return;
diff --git a/arch/powerpc/kexec/Makefile b/arch/powerpc/kexec/Makefile
index 91e96f5168b7..8e469c4da3f8 100644
--- a/arch/powerpc/kexec/Makefile
+++ b/arch/powerpc/kexec/Makefile
@@ -3,12 +3,13 @@
# Makefile for the linux kernel.
#
-obj-y += core.o crash.o core_$(BITS).o
+obj-y += core.o core_$(BITS).o
obj-$(CONFIG_PPC32) += relocate_32.o
obj-$(CONFIG_KEXEC_FILE) += file_load.o ranges.o file_load_$(BITS).o elf_$(BITS).o
obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
+obj-$(CONFIG_CRASH_DUMP) += crash.o
# Disable GCOV, KCOV & sanitizers in odd or sensitive code
GCOV_PROFILE_core_$(BITS).o := n
diff --git a/arch/powerpc/kexec/core.c b/arch/powerpc/kexec/core.c
index 3ff4411ed496..b8333a49ea5d 100644
--- a/arch/powerpc/kexec/core.c
+++ b/arch/powerpc/kexec/core.c
@@ -44,10 +44,12 @@ void machine_kexec_mask_interrupts(void) {
}
}
+#ifdef CONFIG_CRASH_DUMP
void machine_crash_shutdown(struct pt_regs *regs)
{
default_machine_crash_shutdown(regs);
}
+#endif
void machine_kexec_cleanup(struct kimage *image)
{
@@ -77,6 +79,7 @@ void machine_kexec(struct kimage *image)
for(;;);
}
+#ifdef CONFIG_CRASH_RESERVE
void __init reserve_crashkernel(void)
{
unsigned long long crash_size, crash_base, total_mem_sz;
@@ -251,3 +254,4 @@ static int __init kexec_setup(void)
return 0;
}
late_initcall(kexec_setup);
+#endif /* CONFIG_CRASH_RESERVE */
diff --git a/arch/powerpc/kexec/elf_64.c b/arch/powerpc/kexec/elf_64.c
index 904016cf89ea..6d8951e8e966 100644
--- a/arch/powerpc/kexec/elf_64.c
+++ b/arch/powerpc/kexec/elf_64.c
@@ -47,7 +47,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
if (ret)
return ERR_PTR(ret);
- if (image->type == KEXEC_TYPE_CRASH) {
+ if (IS_ENABLED(CONFIG_CRASH_DUMP) && image->type == KEXEC_TYPE_CRASH) {
/* min & max buffer values for kdump case */
kbuf.buf_min = pbuf.buf_min = crashk_res.start;
kbuf.buf_max = pbuf.buf_max =
@@ -70,7 +70,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
kexec_dprintk("Loaded purgatory at 0x%lx\n", pbuf.mem);
/* Load additional segments needed for panic kernel */
- if (image->type == KEXEC_TYPE_CRASH) {
+ if (IS_ENABLED(CONFIG_CRASH_DUMP) && image->type == KEXEC_TYPE_CRASH) {
ret = load_crashdump_segments_ppc64(image, &kbuf);
if (ret) {
pr_err("Failed to load kdump kernel segments\n");
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index 5b4c5cb23354..1bc65de6174f 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -97,119 +97,6 @@ out:
}
/**
- * get_usable_memory_ranges - Get usable memory ranges. This list includes
- * regions like crashkernel, opal/rtas & tce-table,
- * that kdump kernel could use.
- * @mem_ranges: Range list to add the memory ranges to.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int get_usable_memory_ranges(struct crash_mem **mem_ranges)
-{
- int ret;
-
- /*
- * Early boot failure observed on guests when low memory (first memory
- * block?) is not added to usable memory. So, add [0, crashk_res.end]
- * instead of [crashk_res.start, crashk_res.end] to workaround it.
- * Also, crashed kernel's memory must be added to reserve map to
- * avoid kdump kernel from using it.
- */
- ret = add_mem_range(mem_ranges, 0, crashk_res.end + 1);
- if (ret)
- goto out;
-
- ret = add_rtas_mem_range(mem_ranges);
- if (ret)
- goto out;
-
- ret = add_opal_mem_range(mem_ranges);
- if (ret)
- goto out;
-
- ret = add_tce_mem_ranges(mem_ranges);
-out:
- if (ret)
- pr_err("Failed to setup usable memory ranges\n");
- return ret;
-}
-
-/**
- * get_crash_memory_ranges - Get crash memory ranges. This list includes
- * first/crashing kernel's memory regions that
- * would be exported via an elfcore.
- * @mem_ranges: Range list to add the memory ranges to.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int get_crash_memory_ranges(struct crash_mem **mem_ranges)
-{
- phys_addr_t base, end;
- struct crash_mem *tmem;
- u64 i;
- int ret;
-
- for_each_mem_range(i, &base, &end) {
- u64 size = end - base;
-
- /* Skip backup memory region, which needs a separate entry */
- if (base == BACKUP_SRC_START) {
- if (size > BACKUP_SRC_SIZE) {
- base = BACKUP_SRC_END + 1;
- size -= BACKUP_SRC_SIZE;
- } else
- continue;
- }
-
- ret = add_mem_range(mem_ranges, base, size);
- if (ret)
- goto out;
-
- /* Try merging adjacent ranges before reallocation attempt */
- if ((*mem_ranges)->nr_ranges == (*mem_ranges)->max_nr_ranges)
- sort_memory_ranges(*mem_ranges, true);
- }
-
- /* Reallocate memory ranges if there is no space to split ranges */
- tmem = *mem_ranges;
- if (tmem && (tmem->nr_ranges == tmem->max_nr_ranges)) {
- tmem = realloc_mem_ranges(mem_ranges);
- if (!tmem)
- goto out;
- }
-
- /* Exclude crashkernel region */
- ret = crash_exclude_mem_range(tmem, crashk_res.start, crashk_res.end);
- if (ret)
- goto out;
-
- /*
- * FIXME: For now, stay in parity with kexec-tools but if RTAS/OPAL
- * regions are exported to save their context at the time of
- * crash, they should actually be backed up just like the
- * first 64K bytes of memory.
- */
- ret = add_rtas_mem_range(mem_ranges);
- if (ret)
- goto out;
-
- ret = add_opal_mem_range(mem_ranges);
- if (ret)
- goto out;
-
- /* create a separate program header for the backup region */
- ret = add_mem_range(mem_ranges, BACKUP_SRC_START, BACKUP_SRC_SIZE);
- if (ret)
- goto out;
-
- sort_memory_ranges(*mem_ranges, false);
-out:
- if (ret)
- pr_err("Failed to setup crash memory ranges\n");
- return ret;
-}
-
-/**
* get_reserved_memory_ranges - Get reserve memory ranges. This list includes
* memory regions that should be added to the
* memory reserve map to ensure the region is
@@ -434,6 +321,120 @@ static int locate_mem_hole_bottom_up_ppc64(struct kexec_buf *kbuf,
return ret;
}
+#ifdef CONFIG_CRASH_DUMP
+/**
+ * get_usable_memory_ranges - Get usable memory ranges. This list includes
+ * regions like crashkernel, opal/rtas & tce-table,
+ * that kdump kernel could use.
+ * @mem_ranges: Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+static int get_usable_memory_ranges(struct crash_mem **mem_ranges)
+{
+ int ret;
+
+ /*
+ * Early boot failure observed on guests when low memory (first memory
+ * block?) is not added to usable memory. So, add [0, crashk_res.end]
+ * instead of [crashk_res.start, crashk_res.end] to workaround it.
+ * Also, crashed kernel's memory must be added to reserve map to
+ * avoid kdump kernel from using it.
+ */
+ ret = add_mem_range(mem_ranges, 0, crashk_res.end + 1);
+ if (ret)
+ goto out;
+
+ ret = add_rtas_mem_range(mem_ranges);
+ if (ret)
+ goto out;
+
+ ret = add_opal_mem_range(mem_ranges);
+ if (ret)
+ goto out;
+
+ ret = add_tce_mem_ranges(mem_ranges);
+out:
+ if (ret)
+ pr_err("Failed to setup usable memory ranges\n");
+ return ret;
+}
+
+/**
+ * get_crash_memory_ranges - Get crash memory ranges. This list includes
+ * first/crashing kernel's memory regions that
+ * would be exported via an elfcore.
+ * @mem_ranges: Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+static int get_crash_memory_ranges(struct crash_mem **mem_ranges)
+{
+ phys_addr_t base, end;
+ struct crash_mem *tmem;
+ u64 i;
+ int ret;
+
+ for_each_mem_range(i, &base, &end) {
+ u64 size = end - base;
+
+ /* Skip backup memory region, which needs a separate entry */
+ if (base == BACKUP_SRC_START) {
+ if (size > BACKUP_SRC_SIZE) {
+ base = BACKUP_SRC_END + 1;
+ size -= BACKUP_SRC_SIZE;
+ } else
+ continue;
+ }
+
+ ret = add_mem_range(mem_ranges, base, size);
+ if (ret)
+ goto out;
+
+ /* Try merging adjacent ranges before reallocation attempt */
+ if ((*mem_ranges)->nr_ranges == (*mem_ranges)->max_nr_ranges)
+ sort_memory_ranges(*mem_ranges, true);
+ }
+
+ /* Reallocate memory ranges if there is no space to split ranges */
+ tmem = *mem_ranges;
+ if (tmem && (tmem->nr_ranges == tmem->max_nr_ranges)) {
+ tmem = realloc_mem_ranges(mem_ranges);
+ if (!tmem)
+ goto out;
+ }
+
+ /* Exclude crashkernel region */
+ ret = crash_exclude_mem_range(tmem, crashk_res.start, crashk_res.end);
+ if (ret)
+ goto out;
+
+ /*
+ * FIXME: For now, stay in parity with kexec-tools but if RTAS/OPAL
+ * regions are exported to save their context at the time of
+ * crash, they should actually be backed up just like the
+ * first 64K bytes of memory.
+ */
+ ret = add_rtas_mem_range(mem_ranges);
+ if (ret)
+ goto out;
+
+ ret = add_opal_mem_range(mem_ranges);
+ if (ret)
+ goto out;
+
+ /* create a separate program header for the backup region */
+ ret = add_mem_range(mem_ranges, BACKUP_SRC_START, BACKUP_SRC_SIZE);
+ if (ret)
+ goto out;
+
+ sort_memory_ranges(*mem_ranges, false);
+out:
+ if (ret)
+ pr_err("Failed to setup crash memory ranges\n");
+ return ret;
+}
+
/**
* check_realloc_usable_mem - Reallocate buffer if it can't accommodate entries
* @um_info: Usable memory buffer and ranges info.
@@ -863,6 +864,7 @@ int load_crashdump_segments_ppc64(struct kimage *image,
return 0;
}
+#endif
/**
* setup_purgatory_ppc64 - initialize PPC64 specific purgatory's global
@@ -972,26 +974,14 @@ static unsigned int cpu_node_size(void)
return size;
}
-/**
- * kexec_extra_fdt_size_ppc64 - Return the estimated additional size needed to
- * setup FDT for kexec/kdump kernel.
- * @image: kexec image being loaded.
- *
- * Returns the estimated extra size needed for kexec/kdump kernel FDT.
- */
-unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image)
+static unsigned int kdump_extra_fdt_size_ppc64(struct kimage *image)
{
unsigned int cpu_nodes, extra_size = 0;
struct device_node *dn;
u64 usm_entries;
- // Budget some space for the password blob. There's already extra space
- // for the key name
- if (plpks_is_available())
- extra_size += (unsigned int)plpks_get_passwordlen();
-
- if (image->type != KEXEC_TYPE_CRASH)
- return extra_size;
+ if (!IS_ENABLED(CONFIG_CRASH_DUMP) || image->type != KEXEC_TYPE_CRASH)
+ return 0;
/*
* For kdump kernel, account for linux,usable-memory and
@@ -1020,6 +1010,25 @@ unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image)
}
/**
+ * kexec_extra_fdt_size_ppc64 - Return the estimated additional size needed to
+ * setup FDT for kexec/kdump kernel.
+ * @image: kexec image being loaded.
+ *
+ * Returns the estimated extra size needed for kexec/kdump kernel FDT.
+ */
+unsigned int kexec_extra_fdt_size_ppc64(struct kimage *image)
+{
+ unsigned int extra_size = 0;
+
+ // Budget some space for the password blob. There's already extra space
+ // for the key name
+ if (plpks_is_available())
+ extra_size += (unsigned int)plpks_get_passwordlen();
+
+ return extra_size + kdump_extra_fdt_size_ppc64(image);
+}
+
+/**
* add_node_props - Reads node properties from device node structure and add
* them to fdt.
* @fdt: Flattened device tree of the kernel
@@ -1171,6 +1180,7 @@ int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
struct crash_mem *umem = NULL, *rmem = NULL;
int i, nr_ranges, ret;
+#ifdef CONFIG_CRASH_DUMP
/*
* Restrict memory usage for kdump kernel by setting up
* usable memory ranges and memory reserve map.
@@ -1207,6 +1217,7 @@ int setup_new_fdt_ppc64(const struct kimage *image, void *fdt,
goto out;
}
}
+#endif
/* Update cpus nodes information to account hotplug CPUs. */
ret = update_cpus_node(fdt);
@@ -1278,7 +1289,7 @@ int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf)
buf_min = kbuf->buf_min;
buf_max = kbuf->buf_max;
/* Segments for kdump kernel should be within crashkernel region */
- if (kbuf->image->type == KEXEC_TYPE_CRASH) {
+ if (IS_ENABLED(CONFIG_CRASH_DUMP) && kbuf->image->type == KEXEC_TYPE_CRASH) {
buf_min = (buf_min < crashk_res.start ?
crashk_res.start : buf_min);
buf_max = (buf_max > crashk_res.end ?
diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c
index 5445587bfe84..100f999871bc 100644
--- a/arch/powerpc/mm/book3s32/mmu.c
+++ b/arch/powerpc/mm/book3s32/mmu.c
@@ -193,7 +193,7 @@ static bool is_module_segment(unsigned long addr)
return true;
}
-void mmu_mark_initmem_nx(void)
+int mmu_mark_initmem_nx(void)
{
int nb = mmu_has_feature(MMU_FTR_USE_HIGH_BATS) ? 8 : 4;
int i;
@@ -230,9 +230,10 @@ void mmu_mark_initmem_nx(void)
mtsr(mfsr(i << 28) | 0x10000000, i << 28);
}
+ return 0;
}
-void mmu_mark_rodata_ro(void)
+int mmu_mark_rodata_ro(void)
{
int nb = mmu_has_feature(MMU_FTR_USE_HIGH_BATS) ? 8 : 4;
int i;
@@ -245,6 +246,8 @@ void mmu_mark_rodata_ro(void)
}
update_bats();
+
+ return 0;
}
/*
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index 8e84bc214d13..6949c2c937e7 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -160,11 +160,11 @@ static inline unsigned long p_block_mapped(phys_addr_t pa) { return 0; }
#endif
#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_E500)
-void mmu_mark_initmem_nx(void);
-void mmu_mark_rodata_ro(void);
+int mmu_mark_initmem_nx(void);
+int mmu_mark_rodata_ro(void);
#else
-static inline void mmu_mark_initmem_nx(void) { }
-static inline void mmu_mark_rodata_ro(void) { }
+static inline int mmu_mark_initmem_nx(void) { return 0; }
+static inline int mmu_mark_rodata_ro(void) { return 0; }
#endif
#ifdef CONFIG_PPC_8xx
diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c
index 6be6421086ed..43d4842bb1c7 100644
--- a/arch/powerpc/mm/nohash/8xx.c
+++ b/arch/powerpc/mm/nohash/8xx.c
@@ -119,23 +119,26 @@ void __init mmu_mapin_immr(void)
PAGE_KERNEL_NCG, MMU_PAGE_512K, true);
}
-static void mmu_mapin_ram_chunk(unsigned long offset, unsigned long top,
- pgprot_t prot, bool new)
+static int mmu_mapin_ram_chunk(unsigned long offset, unsigned long top,
+ pgprot_t prot, bool new)
{
unsigned long v = PAGE_OFFSET + offset;
unsigned long p = offset;
+ int err = 0;
WARN_ON(!IS_ALIGNED(offset, SZ_512K) || !IS_ALIGNED(top, SZ_512K));
- for (; p < ALIGN(p, SZ_8M) && p < top; p += SZ_512K, v += SZ_512K)
- __early_map_kernel_hugepage(v, p, prot, MMU_PAGE_512K, new);
- for (; p < ALIGN_DOWN(top, SZ_8M) && p < top; p += SZ_8M, v += SZ_8M)
- __early_map_kernel_hugepage(v, p, prot, MMU_PAGE_8M, new);
- for (; p < ALIGN_DOWN(top, SZ_512K) && p < top; p += SZ_512K, v += SZ_512K)
- __early_map_kernel_hugepage(v, p, prot, MMU_PAGE_512K, new);
+ for (; p < ALIGN(p, SZ_8M) && p < top && !err; p += SZ_512K, v += SZ_512K)
+ err = __early_map_kernel_hugepage(v, p, prot, MMU_PAGE_512K, new);
+ for (; p < ALIGN_DOWN(top, SZ_8M) && p < top && !err; p += SZ_8M, v += SZ_8M)
+ err = __early_map_kernel_hugepage(v, p, prot, MMU_PAGE_8M, new);
+ for (; p < ALIGN_DOWN(top, SZ_512K) && p < top && !err; p += SZ_512K, v += SZ_512K)
+ err = __early_map_kernel_hugepage(v, p, prot, MMU_PAGE_512K, new);
if (!new)
flush_tlb_kernel_range(PAGE_OFFSET + v, PAGE_OFFSET + top);
+
+ return err;
}
unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
@@ -166,27 +169,33 @@ unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
return top;
}
-void mmu_mark_initmem_nx(void)
+int mmu_mark_initmem_nx(void)
{
unsigned long etext8 = ALIGN(__pa(_etext), SZ_8M);
unsigned long sinittext = __pa(_sinittext);
unsigned long boundary = strict_kernel_rwx_enabled() ? sinittext : etext8;
unsigned long einittext8 = ALIGN(__pa(_einittext), SZ_8M);
+ int err = 0;
if (!debug_pagealloc_enabled_or_kfence())
- mmu_mapin_ram_chunk(boundary, einittext8, PAGE_KERNEL, false);
+ err = mmu_mapin_ram_chunk(boundary, einittext8, PAGE_KERNEL, false);
mmu_pin_tlb(block_mapped_ram, false);
+
+ return err;
}
#ifdef CONFIG_STRICT_KERNEL_RWX
-void mmu_mark_rodata_ro(void)
+int mmu_mark_rodata_ro(void)
{
unsigned long sinittext = __pa(_sinittext);
+ int err;
- mmu_mapin_ram_chunk(0, sinittext, PAGE_KERNEL_ROX, false);
+ err = mmu_mapin_ram_chunk(0, sinittext, PAGE_KERNEL_ROX, false);
if (IS_ENABLED(CONFIG_PIN_TLB_DATA))
mmu_pin_tlb(block_mapped_ram, true);
+
+ return err;
}
#endif
diff --git a/arch/powerpc/mm/nohash/e500.c b/arch/powerpc/mm/nohash/e500.c
index 921c3521ec11..266fb22131fc 100644
--- a/arch/powerpc/mm/nohash/e500.c
+++ b/arch/powerpc/mm/nohash/e500.c
@@ -285,19 +285,23 @@ void __init adjust_total_lowmem(void)
}
#ifdef CONFIG_STRICT_KERNEL_RWX
-void mmu_mark_rodata_ro(void)
+int mmu_mark_rodata_ro(void)
{
unsigned long remapped;
remapped = map_mem_in_cams(__max_low_memory, CONFIG_LOWMEM_CAM_NUM, false, false);
- WARN_ON(__max_low_memory != remapped);
+ if (WARN_ON(__max_low_memory != remapped))
+ return -EINVAL;
+
+ return 0;
}
#endif
-void mmu_mark_initmem_nx(void)
+int mmu_mark_initmem_nx(void)
{
/* Everything is done in mmu_mark_rodata_ro() */
+ return 0;
}
void setup_initial_memory_limit(phys_addr_t first_memblock_base,
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index face94977cb2..cfd622ebf774 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -130,31 +130,41 @@ void __init mapin_ram(void)
}
}
-void mark_initmem_nx(void)
+static int __mark_initmem_nx(void)
{
unsigned long numpages = PFN_UP((unsigned long)_einittext) -
PFN_DOWN((unsigned long)_sinittext);
+ int err;
- mmu_mark_initmem_nx();
+ err = mmu_mark_initmem_nx();
if (!v_block_mapped((unsigned long)_sinittext)) {
- set_memory_nx((unsigned long)_sinittext, numpages);
- set_memory_rw((unsigned long)_sinittext, numpages);
+ err = set_memory_nx((unsigned long)_sinittext, numpages);
+ if (err)
+ return err;
+ err = set_memory_rw((unsigned long)_sinittext, numpages);
}
+ return err;
+}
+
+void mark_initmem_nx(void)
+{
+ int err = __mark_initmem_nx();
+
+ if (err)
+ panic("%s() failed, err = %d\n", __func__, err);
}
#ifdef CONFIG_STRICT_KERNEL_RWX
-void mark_rodata_ro(void)
+static int __mark_rodata_ro(void)
{
unsigned long numpages;
if (IS_ENABLED(CONFIG_STRICT_MODULE_RWX) && mmu_has_feature(MMU_FTR_HPTE_TABLE))
pr_warn("This platform has HASH MMU, STRICT_MODULE_RWX won't work\n");
- if (v_block_mapped((unsigned long)_stext + 1)) {
- mmu_mark_rodata_ro();
- return;
- }
+ if (v_block_mapped((unsigned long)_stext + 1))
+ return mmu_mark_rodata_ro();
/*
* mark text and rodata as read only. __end_rodata is set by
@@ -164,6 +174,14 @@ void mark_rodata_ro(void)
numpages = PFN_UP((unsigned long)__end_rodata) -
PFN_DOWN((unsigned long)_stext);
- set_memory_ro((unsigned long)_stext, numpages);
+ return set_memory_ro((unsigned long)_stext, numpages);
+}
+
+void mark_rodata_ro(void)
+{
+ int err = __mark_rodata_ro();
+
+ if (err)
+ panic("%s() failed, err = %d\n", __func__, err);
}
#endif
diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c
index 9e1a25398f98..8f14f0581a21 100644
--- a/arch/powerpc/platforms/powernv/smp.c
+++ b/arch/powerpc/platforms/powernv/smp.c
@@ -434,7 +434,7 @@ void __init pnv_smp_init(void)
smp_ops = &pnv_smp_ops;
#ifdef CONFIG_HOTPLUG_CPU
-#ifdef CONFIG_KEXEC_CORE
+#ifdef CONFIG_CRASH_DUMP
crash_wake_offline = 1;
#endif
#endif
diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h
index 23270b16e1db..d33352c2e386 100644
--- a/include/linux/crash_core.h
+++ b/include/linux/crash_core.h
@@ -8,6 +8,12 @@
struct kimage;
+struct crash_mem {
+ unsigned int max_nr_ranges;
+ unsigned int nr_ranges;
+ struct range ranges[] __counted_by(max_nr_ranges);
+};
+
#ifdef CONFIG_CRASH_DUMP
int crash_shrink_memory(unsigned long new_size);
@@ -51,12 +57,6 @@ static inline unsigned int crash_get_elfcorehdr_size(void) { return 0; }
/* Alignment required for elf header segment */
#define ELF_CORE_HEADER_ALIGN 4096
-struct crash_mem {
- unsigned int max_nr_ranges;
- unsigned int nr_ranges;
- struct range ranges[] __counted_by(max_nr_ranges);
-};
-
extern int crash_exclude_mem_range(struct crash_mem *mem,
unsigned long long mstart,
unsigned long long mend);