[PATCH v2 10/18] arm64: KVM/debug: use EL1&0 stage 1 translation regime
From: Andrew Murray <hidden>
Date: 2019-12-20 14:32:31
Also in:
kvm, kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
From: Sudeep Holla <redacted> Now that we have all the save/restore mechanism in place, lets enable the translation regime used by buffer from EL2 stage 1 to EL1 stage 1 on VHE systems. Signed-off-by: Sudeep Holla <redacted> [ Reword commit, don't trap to EL2 ] Signed-off-by: Andrew Murray <redacted> --- arch/arm64/kvm/hyp/switch.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 67b7c160f65b..6c153b79829b 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c@@ -100,6 +100,7 @@ static void activate_traps_vhe(struct kvm_vcpu *vcpu) write_sysreg(val, cpacr_el1); + write_sysreg(vcpu->arch.mdcr_el2 | 3 << MDCR_EL2_E2PB_SHIFT, mdcr_el2); write_sysreg(kvm_get_hyp_vector(), vbar_el1); } NOKPROBE_SYMBOL(activate_traps_vhe);
@@ -117,6 +118,7 @@ static void __hyp_text __activate_traps_nvhe(struct kvm_vcpu *vcpu) __activate_traps_fpsimd32(vcpu); } + write_sysreg(vcpu->arch.mdcr_el2 | 3 << MDCR_EL2_E2PB_SHIFT, mdcr_el2); write_sysreg(val, cptr_el2); if (cpus_have_const_cap(ARM64_WORKAROUND_1319367)) {
--
2.21.0
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