diff options
Diffstat (limited to 'arch/arm64/kvm/debug.c')
| -rw-r--r-- | arch/arm64/kvm/debug.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c index 1a7dab333f55..e027d9c32b0d 100644 --- a/arch/arm64/kvm/debug.c +++ b/arch/arm64/kvm/debug.c @@ -81,6 +81,10 @@ void kvm_init_host_debug_data(void) !(read_sysreg_s(SYS_PMBIDR_EL1) & PMBIDR_EL1_P)) host_data_set_flag(HAS_SPE); + /* Check if we have BRBE implemented and available at the host */ + if (cpuid_feature_extract_unsigned_field(dfr0, ID_AA64DFR0_EL1_BRBE_SHIFT)) + host_data_set_flag(HAS_BRBE); + if (cpuid_feature_extract_unsigned_field(dfr0, ID_AA64DFR0_EL1_TraceFilt_SHIFT)) { /* Force disable trace in protected mode in case of no TRBE */ if (is_protected_kvm_enabled()) @@ -92,6 +96,13 @@ void kvm_init_host_debug_data(void) } } +void kvm_debug_init_vhe(void) +{ + /* Clear PMSCR_EL1.E{0,1}SPE which reset to UNKNOWN values. */ + if (SYS_FIELD_GET(ID_AA64DFR0_EL1, PMSVer, read_sysreg(id_aa64dfr0_el1))) + write_sysreg_el1(0, SYS_PMSCR); +} + /* * Configures the 'external' MDSCR_EL1 value for the guest, i.e. when the host * has taken over MDSCR_EL1. @@ -134,6 +145,9 @@ void kvm_vcpu_load_debug(struct kvm_vcpu *vcpu) /* Must be called before kvm_vcpu_load_vhe() */ KVM_BUG_ON(vcpu_get_flag(vcpu, SYSREGS_ON_CPU), vcpu->kvm); + if (has_vhe()) + *host_data_ptr(host_debug_state.mdcr_el2) = read_sysreg(mdcr_el2); + /* * Determine which of the possible debug states we're in: * @@ -180,6 +194,9 @@ void kvm_vcpu_load_debug(struct kvm_vcpu *vcpu) void kvm_vcpu_put_debug(struct kvm_vcpu *vcpu) { + if (has_vhe()) + write_sysreg(*host_data_ptr(host_debug_state.mdcr_el2), mdcr_el2); + if (likely(!(vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP))) return; |