virt inclusion category: feature bugzilla: https://atomgit.com/openeuler/kernel/issues/10066 ---------------------------------------- When vCPU load enables virtual TLBID, configure HFGRTR2_EL2 to trap reads of TLBIDIDR_EL1 so they can be emulated with the synthesized, guest-appropriate value. On vCPU put, clear the trap again. Add the nTLBIDIDR_EL1 field to the existing HFGRTR2_EL2 register definition in arch/arm64/tools/sysreg so the new bit-field reference compiles. Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com> Signed-off-by: Tian Zheng <zhengtian10@huawei.com> --- arch/arm64/kvm/arm.c | 24 ++++++++++++++++++++++++ arch/arm64/tools/sysreg | 4 +++- 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index a6e487dca1e5..a98f5d34a177 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -958,6 +958,16 @@ static void kvm_vcpu_reload_tlbid(struct kvm *kvm) preempt_enable(); } +static inline void set_tlbididr_trap(void) +{ + u64 val; + + val = read_sysreg_s(SYS_HFGRTR2_EL2); + val &= ~HFGRTR2_EL2_nTLBIDIDR_EL1_MASK; + write_sysreg_s(val, SYS_HFGRTR2_EL2); + isb(); +} + static void kvm_tlbidomain_vcpu_load(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -975,6 +985,8 @@ static void kvm_tlbidomain_vcpu_load(struct kvm_vcpu *vcpu) if (!vdomain->kvm_tlbid_enabled) return; + set_tlbididr_trap(); + current_data = xa_load(&vdomain->vcpu_data_array, vcpu->vcpu_idx); if (WARN_ON_ONCE(!current_data)) return; @@ -1076,6 +1088,16 @@ static void kvm_tlbidomain_vcpu_load(struct kvm_vcpu *vcpu) spin_unlock(&vdomain->tlbid_lock); } +static inline void clear_tlbididr_trap(void) +{ + u64 val; + + val = read_sysreg_s(SYS_HFGRTR2_EL2); + val |= HFGRTR2_EL2_nTLBIDIDR_EL1_MASK; + write_sysreg_s(val, SYS_HFGRTR2_EL2); + isb(); +} + static void kvm_tlbidomain_vcpu_put(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -1083,6 +1105,8 @@ static void kvm_tlbidomain_vcpu_put(struct kvm_vcpu *vcpu) if (!vdomain->kvm_tlbid_enabled) return; + + clear_tlbididr_trap(); } #else static inline void kvm_vcpu_reload_tlbid(struct kvm *kvm) { } diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg index c10f6985f5db..8896f2310d23 100644 --- a/arch/arm64/tools/sysreg +++ b/arch/arm64/tools/sysreg @@ -3001,7 +3001,9 @@ Field 0 nPMECR_EL1 EndSysreg Sysreg HFGRTR2_EL2 3 4 3 1 2 -Res0 63:15 +Res0 63:31 +Field 30 nTLBIDIDR_EL1 +Res0 29:15 Field 14 nACTLRALIAS_EL1 Field 13 nACTLRMASK_EL1 Field 12 nTCR2ALIAS_EL1 -- 2.33.0