diff options
| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2018-07-31 14:08:57 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-09-18 12:03:34 +0100 |
| commit | ab510027dc4dbd1eeb611a34b0cda8b21fcde492 (patch) | |
| tree | 6f71d3b509e910de4db2cebd1b76f33ef11873b7 /arch/arm/include | |
| parent | 5ffdfaedfa0aba3f5db0fbb8ed4f3192be2b39b8 (diff) | |
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/arm/include')
| -rw-r--r-- | arch/arm/include/asm/kvm_arm.h | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/kvm_mmu.h | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h index 3ab8b3781bfe..2d43dca29c72 100644 --- a/arch/arm/include/asm/kvm_arm.h +++ b/arch/arm/include/asm/kvm_arm.h @@ -161,6 +161,7 @@ #else #define VTTBR_X (5 - KVM_T0SZ) #endif +#define VTTBR_CNP_BIT _AC(1, UL) #define VTTBR_BADDR_MASK (((_AC(1, ULL) << (40 - VTTBR_X)) - 1) << VTTBR_X) #define VTTBR_VMID_SHIFT _AC(48, ULL) #define VTTBR_VMID_MASK(size) (_AT(u64, (1 << size) - 1) << VTTBR_VMID_SHIFT) diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h index 265ea9cf7df7..847f01fa429d 100644 --- a/arch/arm/include/asm/kvm_mmu.h +++ b/arch/arm/include/asm/kvm_mmu.h @@ -355,6 +355,11 @@ static inline int hyp_map_aux_data(void) #define kvm_phys_to_vttbr(addr) (addr) +static inline bool kvm_cpu_has_cnp(void) +{ + return false; +} + #endif /* !__ASSEMBLY__ */ #endif /* __ARM_KVM_MMU_H__ */ |