Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-06 05:06:29 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

KVM: arm64: nv: Honor MDCR_EL2.HPME

Browse Source 
When the PMU is configured with split counter ranges, HPME becomes the
enable bit for the counters reserved for EL2.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241025182354.3364124-16-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Oliver Upton 2024-10-25 18:23:50 +00:00
parent 9d15f8290a
commit fe827f9166
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/arm64/kvm/pmu-emul.c
View File

@ -620,8 +620,15 @@ void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val)
static bool kvm_pmu_counter_is_enabled(struct kvm_pmc *pmc)
{
struct kvm_vcpu *vcpu = kvm_pmc_to_vcpu(pmc);
return (kvm_vcpu_read_pmcr(vcpu) & ARMV8_PMU_PMCR_E) &&
(__vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & BIT(pmc->idx));
unsigned int mdcr = __vcpu_sys_reg(vcpu, MDCR_EL2);
if (!(__vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & BIT(pmc->idx)))
return false;
if (kvm_pmu_counter_is_hyp(vcpu, pmc->idx))
return mdcr & MDCR_EL2_HPME;
return kvm_vcpu_read_pmcr(vcpu) & ARMV8_PMU_PMCR_E;
}
static bool kvm_pmc_counts_at_el0(struct kvm_pmc *pmc)