[PATCH v2 1/9] arm64: KVM: PMU: Refactor pmu_*_el0_disabled

On 28/03/17 13:46, Christoffer Dall wrote:

On Mon, Mar 27, 2017 at 05:03:37PM +0100, Marc Zyngier wrote:

quoted

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 <redacted>
---
 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 0e26f8c2b56f..7e1d673304d5 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);

nit: I would call this variable 'enabled' and then return !enabled to
make it clear what's going on.

(If you agree, I can fix this up when applying along with the typo and
rename pointed out by Suzuki).

Yup, that'd be absolutely fine.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...