linux-kernel - Re: [PATCH v11 16/19] KVM: xen: split up kvm_xen_set_evtchn

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Date: Tue, 19 Dec 2023 16:46:40 +0000
From: David Woodhouse <dwmw2@...radead.org>
To: Paul Durrant <paul@....org>, Paolo Bonzini <pbonzini@...hat.com>,
 Jonathan Corbet <corbet@....net>, Sean Christopherson <seanjc@...gle.com>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
 Shuah Khan <shuah@...nel.org>, kvm@...r.kernel.org,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v11 16/19] KVM: xen: split up kvm_xen_set_evtchn_fast()

On 19 December 2023 16:11:06 GMT, Paul Durrant <paul@....org> wrote:
>From: Paul Durrant <pdurrant@...zon.com>
>
>The implementation of kvm_xen_set_evtchn_fast() is a rather lengthy piece
>of code that performs two operations: updating of the shared_info
>evtchn_pending mask, and updating of the vcpu_info evtchn_pending_sel
>mask. Introduce a separate function to perform each of those operations and
>re-work kvm_xen_set_evtchn_fast() to use them.
>
>No functional change intended.
>
>Signed-off-by: Paul Durrant <pdurrant@...zon.com

Reviewed-by: <dwmw@...zon.co.uk>

Would still like to see the xen_shinfo_test use an evtchn port# which triggers the bug in the precious version.