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| author | Huacai Chen <chenhc@lemote.com> | 2020-05-23 15:56:39 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-06-04 13:51:45 -0400 |
| commit | 8a5097ee90c25656db23f44520a9dad7983d88fb (patch) | |
| tree | c901cd23c5fb2f2ec7753363cb2fd0846d7efe5a /arch/mips/kvm/tlb.c | |
| parent | 7f2a83f1c2a941ebfee53f504ed5fdbc61cfb333 (diff) | |
| download | lwn-8a5097ee90c25656db23f44520a9dad7983d88fb.tar.gz lwn-8a5097ee90c25656db23f44520a9dad7983d88fb.zip | |
KVM: MIPS: Add CONFIG6 and DIAG registers emulation
Loongson-3 has CONFIG6 and DIAG registers which need to be emulated.
CONFIG6 is mostly used to enable/disable FTLB and SFB, while DIAG is
mostly used to flush BTB, ITLB, DTLB, VTLB and FTLB.
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <1590220602-3547-13-git-send-email-chenhc@lemote.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips/kvm/tlb.c')
| -rw-r--r-- | arch/mips/kvm/tlb.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/mips/kvm/tlb.c b/arch/mips/kvm/tlb.c index 5d436c5216cc..2ecf4f05a980 100644 --- a/arch/mips/kvm/tlb.c +++ b/arch/mips/kvm/tlb.c @@ -20,6 +20,7 @@ #include <asm/cpu.h> #include <asm/bootinfo.h> +#include <asm/mipsregs.h> #include <asm/mmu_context.h> #include <asm/pgtable.h> #include <asm/cacheflush.h> @@ -622,6 +623,46 @@ void kvm_vz_load_guesttlb(const struct kvm_mips_tlb *buf, unsigned int index, } EXPORT_SYMBOL_GPL(kvm_vz_load_guesttlb); +#ifdef CONFIG_CPU_LOONGSON64 +void kvm_loongson_clear_guest_vtlb(void) +{ + int idx = read_gc0_index(); + + /* Set root GuestID for root probe and write of guest TLB entry */ + set_root_gid_to_guest_gid(); + + write_gc0_index(0); + guest_tlbinvf(); + write_gc0_index(idx); + + clear_root_gid(); + set_c0_diag(LOONGSON_DIAG_ITLB | LOONGSON_DIAG_DTLB); +} +EXPORT_SYMBOL_GPL(kvm_loongson_clear_guest_vtlb); + +void kvm_loongson_clear_guest_ftlb(void) +{ + int i; + int idx = read_gc0_index(); + + /* Set root GuestID for root probe and write of guest TLB entry */ + set_root_gid_to_guest_gid(); + + for (i = current_cpu_data.tlbsizevtlb; + i < (current_cpu_data.tlbsizevtlb + + current_cpu_data.tlbsizeftlbsets); + i++) { + write_gc0_index(i); + guest_tlbinvf(); + } + write_gc0_index(idx); + + clear_root_gid(); + set_c0_diag(LOONGSON_DIAG_ITLB | LOONGSON_DIAG_DTLB); +} +EXPORT_SYMBOL_GPL(kvm_loongson_clear_guest_ftlb); +#endif + #endif /** |