linux-kernel - Re: [PATCH v4] x86/xen: Add support for HVMOP_set_evtchn_upcall

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Date:   Sun, 14 Aug 2022 10:37:14 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Jane Malalane <jane.malalane@...rix.com>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.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>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        Jan Beulich <jbeulich@...e.com>,
        Maximilian Heyne <mheyne@...zon.de>,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH v4] x86/xen: Add support for
 HVMOP_set_evtchn_upcall_vector

On 29.07.22 09:04, Jane Malalane wrote:
> Implement support for the HVMOP_set_evtchn_upcall_vector hypercall in
> order to set the per-vCPU event channel vector callback on Linux and
> use it in preference of HVM_PARAM_CALLBACK_IRQ.
> 
> If the per-VCPU vector setup is successful on BSP, use this method
> for the APs. If not, fallback to the global vector-type callback.
> 
> Also register callback_irq at per-vCPU event channel setup to trick
> toolstack to think the domain is enlightened.
> 
> Suggested-by: "Roger Pau Monné" <roger.pau@...rix.com>
> Signed-off-by: Jane Malalane <jane.malalane@...rix.com>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>

Pushed to xen/tip.git for-linus-6.0


Juergen

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