diff options
Diffstat (limited to 'arch/arm64/kvm/debug.c')
| -rw-r--r-- | arch/arm64/kvm/debug.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c index 3ad6b7c6e4ba..f4d7b12045e8 100644 --- a/arch/arm64/kvm/debug.c +++ b/arch/arm64/kvm/debug.c @@ -10,6 +10,7 @@ #include <linux/kvm_host.h> #include <linux/hw_breakpoint.h> +#include <asm/arm_pmuv3.h> #include <asm/debug-monitors.h> #include <asm/kvm_asm.h> #include <asm/kvm_arm.h> @@ -75,8 +76,10 @@ static void kvm_arm_setup_mdcr_el2(struct kvm_vcpu *vcpu) void kvm_init_host_debug_data(void) { u64 dfr0 = read_sysreg(id_aa64dfr0_el1); + unsigned int pmuver = cpuid_feature_extract_unsigned_field(dfr0, + ID_AA64DFR0_EL1_PMUVer_SHIFT); - if (cpuid_feature_extract_signed_field(dfr0, ID_AA64DFR0_EL1_PMUVer_SHIFT) > 0) + if (pmuv3_implemented(pmuver)) *host_data_ptr(nr_event_counters) = FIELD_GET(ARMV8_PMU_PMCR_N, read_sysreg(pmcr_el0)); |