| Message ID | 20190228160737.3323-12-sudeep.holla@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: KVM: add SPE profiling support for guest | expand |
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 3054b8b8f037..8738e9438780 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -106,6 +106,7 @@ static void activate_traps_vhe(struct kvm_vcpu *vcpu) write_sysreg(val, cpacr_el1); + write_sysreg(vcpu->arch.mdcr_el2 | 2 << MDCR_EL2_E2PB_SHIFT, mdcr_el2); write_sysreg(kvm_get_hyp_vector(), vbar_el1); } NOKPROBE_SYMBOL(activate_traps_vhe); @@ -123,6 +124,7 @@ static void __hyp_text __activate_traps_nvhe(struct kvm_vcpu *vcpu) __activate_traps_fpsimd32(vcpu); } + write_sysreg(vcpu->arch.mdcr_el2 | 2 << MDCR_EL2_E2PB_SHIFT, mdcr_el2); write_sysreg(val, cptr_el2); }
Now that we have all the save/restore mechanism in place, lets enable trapping of accesses to SPE profiling buffer controls at EL1 to EL2. This will also change the translation regime used by buffer from EL2 stage 1 to EL1 stage 1 on VHE systems. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- arch/arm64/kvm/hyp/switch.c | 2 ++ 1 file changed, 2 insertions(+)