From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: David Woodhouse <dwmw@amazon.co.uk>
Subject: [PATCH] KVM: flush deferred static key before checking it
Date: Fri, 26 Feb 2021 05:08:53 -0500 [thread overview]
Message-ID: <20210226100853.75344-1-pbonzini@redhat.com> (raw)
A missing flush would cause the static branch to trigger incorrectly.
Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/x86.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1d2bc89431a2..bfc928495bd4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8039,6 +8039,7 @@ void kvm_arch_exit(void)
kvm_mmu_module_exit();
free_percpu(user_return_msrs);
kmem_cache_destroy(x86_fpu_cache);
+ static_key_deferred_flush(&kvm_xen_enabled);
WARN_ON(static_branch_unlikely(&kvm_xen_enabled.key));
}
--
2.26.2
next reply other threads:[~2021-02-26 10:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-26 10:08 Paolo Bonzini [this message]
2021-03-01 12:24 ` [PATCH] KVM: flush deferred static key before checking it Woodhouse, David
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=20210226100853.75344-1-pbonzini@redhat.com \
--to=pbonzini@redhat.com \
--cc=dwmw@amazon.co.uk \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.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).