While nVHE KVM is installed, start trapping all host SMCs. By default, these are simply forwarded to EL3, but PSCI SMCs are validated first. Create new constant HCR_HOST_NVHE_STUB_FLAGS with the old set of HCR flags to use before the nVHE vector is installed or when switching back to stub vector. Extend HCR_HOST_NVHE_FLAGS to contain HCR_TSC. Set HCR_EL2 to it before installing nVHE vector. Signed-off-by: David Brazdil <dbrazdil@xxxxxxxxxx> --- arch/arm64/include/asm/kvm_arm.h | 3 ++- arch/arm64/kernel/head.S | 2 +- arch/arm64/kvm/hyp/nvhe/hyp-init.S | 6 ++++++ 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 64ce29378467..04b862955f32 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -79,7 +79,8 @@ HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \ HCR_FMO | HCR_IMO | HCR_PTW ) #define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF) -#define HCR_HOST_NVHE_FLAGS (HCR_RW | HCR_API | HCR_APK | HCR_ATA) +#define HCR_HOST_NVHE_STUB_FLAGS (HCR_RW | HCR_API | HCR_APK | HCR_ATA) +#define HCR_HOST_NVHE_FLAGS (HCR_HOST_NVHE_STUB_FLAGS | HCR_TSC) #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) /* TCR_EL2 Registers bits */ diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index e7270b63abed..ea17413a04e0 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -522,7 +522,7 @@ SYM_FUNC_START(el2_setup) #endif SYM_INNER_LABEL(el2_setup_nvhe, SYM_L_LOCAL) - mov_q x0, HCR_HOST_NVHE_FLAGS + mov_q x0, HCR_HOST_NVHE_STUB_FLAGS msr hcr_el2, x0 isb diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-init.S b/arch/arm64/kvm/hyp/nvhe/hyp-init.S index dd297a1a8f82..97684deba6c1 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-init.S +++ b/arch/arm64/kvm/hyp/nvhe/hyp-init.S @@ -88,6 +88,10 @@ SYM_CODE_END(__kvm_hyp_init) * x0: struct kvm_nvhe_init_params PA */ SYM_CODE_START(___kvm_hyp_init) + mov_q x1, HCR_HOST_NVHE_FLAGS + msr hcr_el2, x1 + isb + ldr x1, [x0, #NVHE_INIT_TPIDR_EL2] msr tpidr_el2, x1 @@ -220,6 +224,8 @@ reset: bic x5, x5, x6 // Clear SCTL_M and etc pre_disable_mmu_workaround msr sctlr_el2, x5 + mov_q x5, HCR_HOST_NVHE_STUB_FLAGS + msr hcr_el2, x5 isb /* Install stub vectors */ -- 2.29.1.341.ge80a0c044ae-goog _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
