diff options
| author | Kristina Martsenko <kristina.martsenko@arm.com> | 2023-05-09 15:22:27 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2023-06-05 17:05:26 +0100 |
| commit | 306b4c9f7120c485607cbbfa1ac3ecec005d8231 (patch) | |
| tree | 2f90c27214cd967e44fefac756bb179658eefe54 | |
| parent | b0c756fe996ac930033882ca56410639e5cad1ec (diff) | |
| download | linux-306b4c9f7120c485607cbbfa1ac3ecec005d8231.tar.gz linux-306b4c9f7120c485607cbbfa1ac3ecec005d8231.tar.bz2 linux-306b4c9f7120c485607cbbfa1ac3ecec005d8231.zip | |
KVM: arm64: switch HCRX_EL2 between host and guest
Switch the HCRX_EL2 register between host and guest configurations, in
order to enable different features in the host and guest.
Now that there are separate guest flags, we can also remove SMPME from
the host flags, as SMPME is used for virtualizing SME priorities and has
no use in the host.
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20230509142235.3284028-4-kristina.martsenko@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 3 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/include/hyp/switch.h | 6 |
2 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index fb7fe28b8eb8..7bb2fbddda54 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -93,7 +93,8 @@ #define HCR_HOST_NVHE_PROTECTED_FLAGS (HCR_HOST_NVHE_FLAGS | HCR_TSC) #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) -#define HCRX_HOST_FLAGS (HCRX_EL2_SMPME) +#define HCRX_GUEST_FLAGS (HCRX_EL2_SMPME) +#define HCRX_HOST_FLAGS 0 /* TCR_EL2 Registers bits */ #define TCR_EL2_RES1 ((1U << 31) | (1 << 23)) diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index e78a08a72a3c..eb123aa7479d 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -130,6 +130,9 @@ static inline void ___activate_traps(struct kvm_vcpu *vcpu) if (cpus_have_final_cap(ARM64_HAS_RAS_EXTN) && (hcr & HCR_VSE)) write_sysreg_s(vcpu->arch.vsesr_el2, SYS_VSESR_EL2); + + if (cpus_have_final_cap(ARM64_HAS_HCX)) + write_sysreg_s(HCRX_GUEST_FLAGS, SYS_HCRX_EL2); } static inline void ___deactivate_traps(struct kvm_vcpu *vcpu) @@ -144,6 +147,9 @@ static inline void ___deactivate_traps(struct kvm_vcpu *vcpu) vcpu->arch.hcr_el2 &= ~HCR_VSE; vcpu->arch.hcr_el2 |= read_sysreg(hcr_el2) & HCR_VSE; } + + if (cpus_have_final_cap(ARM64_HAS_HCX)) + write_sysreg_s(HCRX_HOST_FLAGS, SYS_HCRX_EL2); } static inline bool __populate_fault_info(struct kvm_vcpu *vcpu) |