From: "joro@8bytes.org" <joro@8bytes.org>
To: "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@amd.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"rkrcmar@redhat.com" <rkrcmar@redhat.com>,
Wei Wang <wawei@amazon.de>, Amadeusz Juskowiak <ajusk@amazon.de>,
Julian Stecklina <jsteckli@amazon.de>
Subject: Re: [PATCH] svm: Add mutex_lock to protect apic_access_page_done on AMD systems
Date: Mon, 12 Nov 2018 14:37:32 +0100 [thread overview]
Message-ID: <20181112133731.lwje2hzibd64cvc3@8bytes.org> (raw)
In-Reply-To: <20181112122255.128953-1-Suravee.Suthikulpanit@amd.com>
On Mon, Nov 12, 2018 at 12:23:14PM +0000, Suthikulpanit, Suravee wrote:
> From: Wei Wang <wawei@amazon.de>
>
> There is a race condition when accessing kvm->arch.apic_access_page_done.
> Due to it, x86_set_memory_region will fail when creating the second vcpu
> for a svm guest.
>
> Add a mutex_lock to serialize the accesses to apic_access_page_done.
> This lock is also used by vmx for the same purpose.
>
> Signed-off-by: Wei Wang <wawei@amazon.de>
> Signed-off-by: Amadeusz Juskowiak <ajusk@amazon.de>
> Signed-off-by: Julian Stecklina <jsteckli@amazon.de>
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
next prev parent reply other threads:[~2018-11-12 13:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-12 12:23 Suthikulpanit, Suravee
2018-11-12 13:37 ` joro [this message]
2018-11-25 17:34 ` Paolo Bonzini
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