@@ -72,11 +72,16 @@ static inline u64 read_pmcr(void)
return read_sysreg(pmcr_el0);
}
-static inline void write_pmselr(u32 val)
+static inline void write_pmselr(u64 val)
{
write_sysreg(val, pmselr_el0);
}
+static inline u64 read_pmselr(void)
+{
+ return read_sysreg(pmselr_el0);
+}
+
static inline void write_pmccntr(u64 val)
{
write_sysreg(val, pmccntr_el0);
@@ -1061,14 +1061,19 @@ static void writethrough_pmevtyper(struct kvm_vcpu *vcpu, struct sys_reg_params
static bool access_pmu_evtyper(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
const struct sys_reg_desc *r)
{
- u64 idx, reg;
+ u64 idx, reg, pmselr;
if (pmu_access_el0_disabled(vcpu))
return false;
if (r->CRn == 9 && r->CRm == 13 && r->Op2 == 1) {
/* PMXEVTYPER_EL0 */
- idx = SYS_FIELD_GET(PMSELR_EL0, SEL, __vcpu_sys_reg(vcpu, PMSELR_EL0));
+ if (kvm_vcpu_pmu_is_partitioned(vcpu))
+ pmselr = read_pmselr();
+ else
+ pmselr = __vcpu_sys_reg(vcpu, PMSELR_EL0);
+
+ idx = SYS_FIELD_GET(PMSELR_EL0, SEL, pmselr);
reg = PMEVTYPER0_EL0 + idx;
} else if (r->CRn == 14 && (r->CRm & 12) == 12) {
idx = ((r->CRm & 3) << 3) | (r->Op2 & 7);
Because PMXEVTYPER is trapped and PMSELR is not, it is not appropriate to use the virtual PMSELR register when it could be outdated and lead to an invalid write. Use the physical register. Signed-off-by: Colton Lewis <coltonlewis@google.com> --- arch/arm64/include/asm/arm_pmuv3.h | 7 ++++++- arch/arm64/kvm/sys_regs.c | 9 +++++++-- 2 files changed, 13 insertions(+), 3 deletions(-)