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arm64: KVM: Fix wrong use of the CPSR MODE mask for 32bit guests 

The values of CPSR MODE mask are different between aarch32 and aarch64.
It should use the right one according to the execution state.

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Shannon Zhao 2016-01-13 17:16:39 +08:00 committed by Marc Zyngier
parent a7e0ac295d
commit 9586a2ea68
1 changed files with 6 additions and 2 deletions
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8
arch/arm64/include/asm/kvm_emulate.h
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@ -127,10 +127,14 @@ static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
{
u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
u32 mode;
if (vcpu_mode_is_32bit(vcpu))
if (vcpu_mode_is_32bit(vcpu)) {
mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
return mode > COMPAT_PSR_MODE_USR;
}
mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
return mode != PSR_MODE_EL0t;
}