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[PULL,19/19] KVM: arm/arm64: Fix broken GICH_ELRSR big endian conversion

Message ID 20171204140348.21965-17-cdall@kernel.org
State New
Headers show
Series None | expand

Commit Message

Christoffer Dall Dec. 4, 2017, 2:03 p.m. UTC 
From: Christoffer Dall <christoffer.dall@linaro.org>


We are incorrectly rearranging 32-bit words inside a 64-bit typed value
for big endian systems, which would result in never marking a virtual
interrupt as inactive on big endian systems (assuming 32 or fewer LRs on
the hardware).  Fix this by not doing any word order manipulation for
the typed values.

Cc: <stable@vger.kernel.org>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

---
 virt/kvm/arm/hyp/vgic-v2-sr.c | 4 ----
 1 file changed, 4 deletions(-)

-- 
2.14.2
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Patch

diff --git a/virt/kvm/arm/hyp/vgic-v2-sr.c b/virt/kvm/arm/hyp/vgic-v2-sr.c
index a3f18d362366..d7fd46fe9efb 100644
--- a/virt/kvm/arm/hyp/vgic-v2-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v2-sr.c
@@ -34,11 +34,7 @@  static void __hyp_text save_elrsr(struct kvm_vcpu *vcpu, void __iomem *base)
 	else
 		elrsr1 = 0;
 
-#ifdef CONFIG_CPU_BIG_ENDIAN
-	cpu_if->vgic_elrsr = ((u64)elrsr0 << 32) | elrsr1;
-#else
 	cpu_if->vgic_elrsr = ((u64)elrsr1 << 32) | elrsr0;
-#endif
 }
 
 static void __hyp_text save_lrs(struct kvm_vcpu *vcpu, void __iomem *base)