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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2018-07-31 16:08:57 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-09-18 14:03:34 +0300 |
| commit | ab510027dc4dbd1eeb611a34b0cda8b21fcde492 (patch) | |
| tree | 6f71d3b509e910de4db2cebd1b76f33ef11873b7 /arch/arm64/include/asm/kvm_mmu.h | |
| parent | 5ffdfaedfa0aba3f5db0fbb8ed4f3192be2b39b8 (diff) | |
| download | linux-ab510027dc4dbd1eeb611a34b0cda8b21fcde492.tar.xz | |
arm64: KVM: Enable Common Not Private translations
We rely on cpufeature framework to detect and enable CNP so for KVM we
need to patch hyp to set CNP bit just before TTBR0_EL2 gets written.
For the guest we encode CNP bit while building vttbr, so we don't need
to bother with that in a world switch.
Reviewed-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index d6fff7de5539..64337afbf124 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -517,5 +517,10 @@ static inline int hyp_map_aux_data(void) #define kvm_phys_to_vttbr(addr) phys_to_ttbr(addr) +static inline bool kvm_cpu_has_cnp(void) +{ + return system_supports_cnp(); +} + #endif /* __ASSEMBLY__ */ #endif /* __ARM64_KVM_MMU_H__ */ |