[PATCH 3/8] arm64: KVM: Refactor pmu_*_el0_disabled
Marc Zyngier
marc.zyngier at arm.com
Wed Feb 22 03:47:23 PST 2017
There is a lot of duplication in the pmu_*_el0_disabled helpers,
and as we're going to modify them shortly, let's move all the
common stuff in a single function.
No functionnal change.
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
arch/arm64/kvm/sys_regs.c | 25 +++++++++++--------------
1 file changed, 11 insertions(+), 14 deletions(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 33bad02c0a00..0ebf27f40f98 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -460,35 +460,32 @@ static void reset_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
vcpu_sys_reg(vcpu, PMCR_EL0) = val;
}
-static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu)
+static bool check_disabled(struct kvm_vcpu *vcpu, u64 flags)
{
u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
+ bool cond = (reg & flags) || vcpu_mode_priv(vcpu);
- return !((reg & ARMV8_PMU_USERENR_EN) || vcpu_mode_priv(vcpu));
+ return !cond;
}
-static bool pmu_write_swinc_el0_disabled(struct kvm_vcpu *vcpu)
+static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu)
{
- u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
+ return check_disabled(vcpu, ARMV8_PMU_USERENR_EN);
+}
- return !((reg & (ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN))
- || vcpu_mode_priv(vcpu));
+static bool pmu_write_swinc_el0_disabled(struct kvm_vcpu *vcpu)
+{
+ return check_disabled(vcpu, ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN);
}
static bool pmu_access_cycle_counter_el0_disabled(struct kvm_vcpu *vcpu)
{
- u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
-
- return !((reg & (ARMV8_PMU_USERENR_CR | ARMV8_PMU_USERENR_EN))
- || vcpu_mode_priv(vcpu));
+ return check_disabled(vcpu, ARMV8_PMU_USERENR_CR | ARMV8_PMU_USERENR_EN);
}
static bool pmu_access_event_counter_el0_disabled(struct kvm_vcpu *vcpu)
{
- u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
-
- return !((reg & (ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_EN))
- || vcpu_mode_priv(vcpu));
+ return check_disabled(vcpu, ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_EN);
}
static bool access_pmcr(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
--
2.11.0
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