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authorMarc Zyngier <marc.zyngier@arm.com>2014-12-19 16:05:31 +0000
committerChristoffer Dall <christoffer.dall@linaro.org>2015-01-29 23:24:56 +0100
commit3c1e716508335eb132c9349cb1a1716c8f7e3d2e (patch)
tree39aa2fe691caa61a34cef1ac7d09f3348249ddb5 /arch/arm/include/asm/kvm_emulate.h
parentf3747379accba8e95d70cec0eae0582c8c182050 (diff)
downloadlinux-3c1e716508335eb132c9349cb1a1716c8f7e3d2e.tar.gz
arm/arm64: KVM: Use set/way op trapping to track the state of the caches
Trying to emulate the behaviour of set/way cache ops is fairly pointless, as there are too many ways we can end-up missing stuff. Also, there is some system caches out there that simply ignore set/way operations. So instead of trying to implement them, let's convert it to VA ops, and use them as a way to re-enable the trapping of VM ops. That way, we can detect the point when the MMU/caches are turned off, and do a full VM flush (which is what the guest was trying to do anyway). This allows a 32bit zImage to boot on the APM thingy, and will probably help bootloaders in general. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/include/asm/kvm_emulate.h')
-rw-r--r--arch/arm/include/asm/kvm_emulate.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index 66ce17655bb9..7b0152321b20 100644
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -38,6 +38,16 @@ static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
vcpu->arch.hcr = HCR_GUEST_MASK;
}
+static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.hcr;
+}
+
+static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
+{
+ vcpu->arch.hcr = hcr;
+}
+
static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
{
return 1;