From: christoffer.dall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [GIT PULL] arm/arm64: KVM: Fix unaligned access bug on gicv2 access
Date: Mon, 22 Sep 2014 23:12:30 +0200 [thread overview]
Message-ID: <1411420350-368-2-git-send-email-christoffer.dall@linaro.org> (raw)
In-Reply-To: <1411420350-368-1-git-send-email-christoffer.dall@linaro.org>
We were using an atomic bitop on the vgic_v2.vgic_elrsr field which was
not aligned to the natural size on 64-bit platforms. This bug showed up
after QEMU correctly identifies the pl011 line as being level-triggered,
and not edge-triggered.
These data structures are protected by a spinlock so simply use a
non-atomic version of the accessor instead.
Tested-by: Joel Schopp <joel.schopp@amd.com>
Reported-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---
virt/kvm/arm/vgic-v2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/virt/kvm/arm/vgic-v2.c b/virt/kvm/arm/vgic-v2.c
index 01124ef..416baed 100644
--- a/virt/kvm/arm/vgic-v2.c
+++ b/virt/kvm/arm/vgic-v2.c
@@ -71,7 +71,7 @@ static void vgic_v2_sync_lr_elrsr(struct kvm_vcpu *vcpu, int lr,
struct vgic_lr lr_desc)
{
if (!(lr_desc.state & LR_STATE_MASK))
- set_bit(lr, (unsigned long *)vcpu->arch.vgic_cpu.vgic_v2.vgic_elrsr);
+ __set_bit(lr, (unsigned long *)vcpu->arch.vgic_cpu.vgic_v2.vgic_elrsr);
}
static u64 vgic_v2_get_elrsr(const struct kvm_vcpu *vcpu)
--
2.0.0
next prev parent reply other threads:[~2014-09-22 21:12 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-22 21:12 [GIT PULL] Last-minute fix for kvm/arm64 Christoffer Dall
2014-09-22 21:12 ` Christoffer Dall [this message]
2014-09-22 22:07 ` [GIT PULL] arm/arm64: KVM: Fix unaligned access bug on gicv2 access Will Deacon
2014-09-23 8:36 ` Paolo Bonzini
2014-09-23 11:14 ` Christoffer Dall
2014-09-23 11:50 ` Paolo Bonzini
2014-09-23 12:44 ` Andre Przywara
2014-09-23 12:48 ` Paolo Bonzini
2014-09-23 13:52 ` Christoffer Dall
2014-09-23 13:52 ` Paolo Bonzini
2014-09-23 14:07 ` Christoffer Dall
2014-09-23 14:01 ` Peter Maydell
2014-09-23 14:03 ` Christoffer Dall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1411420350-368-2-git-send-email-christoffer.dall@linaro.org \
--to=christoffer.dall@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).