From: Christoffer Dall <cdall@kernel.org>
To: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
Marc Zyngier <marc.zyngier@arm.com>,
Andre Przywara <andre.przywara@arm.com>,
Christoffer Dall <christoffer.dall@linaro.org>,
stable@vger.kernel.org
Subject: [PATCH] KVM: arm/arm64: Fix broken GICH_ELRSR big endian conversion
Date: Mon, 4 Dec 2017 00:04:34 +0100 [thread overview]
Message-ID: <20171203230435.22021-1-cdall@kernel.org> (raw)
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>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---
virt/kvm/arm/hyp/vgic-v2-sr.c | 4 ----
1 file changed, 4 deletions(-)
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)
--
2.14.2
WARNING: multiple messages have this Message-ID (diff)
From: cdall@kernel.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] KVM: arm/arm64: Fix broken GICH_ELRSR big endian conversion
Date: Mon, 4 Dec 2017 00:04:34 +0100 [thread overview]
Message-ID: <20171203230435.22021-1-cdall@kernel.org> (raw)
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>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---
virt/kvm/arm/hyp/vgic-v2-sr.c | 4 ----
1 file changed, 4 deletions(-)
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)
--
2.14.2
next reply other threads:[~2017-12-03 23:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-03 23:04 Christoffer Dall [this message]
2017-12-03 23:04 ` [PATCH] KVM: arm/arm64: Fix broken GICH_ELRSR big endian conversion Christoffer Dall
2017-12-04 10:05 ` Marc Zyngier
2017-12-04 10:05 ` Marc Zyngier
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