From: David Woodhouse <dwmw2@infradead.org>
To: Paul Durrant <paul@xen.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Paul Durrant <pdurrant@amazon.com>,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org
Subject: Re: [PATCH v3 08/13] KVM: xen: prevent vcpu_id from changing whilst shared_info is valid
Date: Mon, 18 Sep 2023 16:59:38 +0100 [thread overview]
Message-ID: <790646bf2b3331aceebf46543a47400cdbfb02bb.camel@infradead.org> (raw)
In-Reply-To: <20230918144111.641369-9-paul@xen.org>
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On Mon, 2023-09-18 at 14:41 +0000, Paul Durrant wrote:
> From: Paul Durrant <pdurrant@amazon.com>
>
> To further prepare for automatically using the vcpu_info structures
> embedded in the shared_info page, we need to ensure that the Xen vcpu_id
> cannot change under our feet. We can do this by simply returning -EBUSY
> to any attempt to modify the attribute while the shinfo_cache is active.
>
> Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Makes sense. Wants explicitly mentioning in the documentation for
KVM_XEN_VCPU_ATTR_TYPE_VCPU_ID. If/when you did that,
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
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next prev parent reply other threads:[~2023-09-18 16:35 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-18 14:40 [PATCH v3 00/13] KVM: xen: update shared_info and vcpu_info handling Paul Durrant
2023-09-18 14:40 ` [PATCH v3 01/13] KVM: pfncache: add a map helper function Paul Durrant
2023-09-18 14:41 ` [PATCH v3 02/13] KVM: pfncache: add a mark-dirty helper Paul Durrant
2023-09-18 14:41 ` [PATCH v3 03/13] KVM: pfncache: add a helper to get the gpa Paul Durrant
2023-09-18 14:41 ` [PATCH v3 04/13] KVM: pfncache: base offset check on khva rather than gpa Paul Durrant
2023-09-18 14:41 ` [PATCH v3 05/13] KVM: pfncache: allow a cache to be activated with a fixed (userspace) HVA Paul Durrant
2023-09-18 14:41 ` [PATCH v3 06/13] KVM: xen: allow shared_info to be mapped by fixed HVA Paul Durrant
2023-09-18 14:41 ` [PATCH v3 07/13] KVM: xen: prepare for using 'default' vcpu_info Paul Durrant
2023-09-18 14:41 ` [PATCH v3 08/13] KVM: xen: prevent vcpu_id from changing whilst shared_info is valid Paul Durrant
2023-09-18 15:59 ` David Woodhouse [this message]
2023-09-18 14:41 ` [PATCH v3 09/13] KVM: xen: automatically use the vcpu_info embedded in shared_info Paul Durrant
2023-09-18 16:07 ` David Woodhouse
2023-09-18 16:15 ` Paul Durrant
2023-09-18 16:20 ` David Woodhouse
2023-09-18 14:41 ` [PATCH v3 10/13] KVM: selftests / xen: set KVM_XEN_VCPU_ATTR_TYPE_VCPU_ID Paul Durrant
2023-09-18 14:41 ` [PATCH v3 11/13] KVM: selftests / xen: map shared_info using HVA rather than GFN Paul Durrant
2023-09-18 16:16 ` David Woodhouse
2023-09-18 14:41 ` [PATCH v3 12/13] KVM: selftests / xen: don't explicitly set the vcpu_info address Paul Durrant
2023-09-18 16:10 ` David Woodhouse
2023-09-18 14:41 ` [PATCH v3 13/13] KVM: xen: advertize the KVM_XEN_HVM_CONFIG_SHARED_INFO_HVA capability Paul Durrant
2023-09-18 16:18 ` [PATCH v3 00/13] KVM: xen: update shared_info and vcpu_info handling Sean Christopherson
2023-09-18 16:34 ` David Woodhouse
2023-09-18 17:12 ` Sean Christopherson
2023-09-19 8:48 ` Paul Durrant
2023-09-19 15:37 ` Sean Christopherson
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