linux-kernel - Re: [PATCH v3 1/1] x86/hyperv: Switch to msi_create_parent_irq

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Message-ID: <aLonfMzpIF6FZVM5@liuwe-devbox-ubuntu-v2.lamzopl0uupeniq2etz1fddiyg.xx.internal.cloudapp.net>
Date: Thu, 4 Sep 2025 23:57:48 +0000
From: Wei Liu <wei.liu@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
	Nam Cao <namcao@...utronix.de>,
	"K . Y . Srinivasan" <kys@...rosoft.com>,
	Marc Zyngier <maz@...nel.org>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
	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>, linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] x86/hyperv: Switch to
 msi_create_parent_irq_domain()

On Thu, Sep 04, 2025 at 11:57:39AM +0200, Thomas Gleixner wrote:
> On Wed, Sep 03 2025 at 12:40, Nuno Das Neves wrote:
> > On 7/18/2025 12:57 PM, Nam Cao wrote:
> >> Move away from the legacy MSI domain setup, switch to use
> >> msi_create_parent_irq_domain().
> >> 
> >> While doing the conversion, I noticed that hv_irq_compose_msi_msg() is
> >> doing more than it is supposed to (composing message content). The
> >> interrupt allocation bits should be moved into hv_msi_domain_alloc().
> >> However, I have no hardware to test this change, therefore I leave a TODO
> >> note.
> >> 
> >> Signed-off-by: Nam Cao <namcao@...utronix.de>
> >> ---
> >>  arch/x86/hyperv/irqdomain.c | 111 ++++++++++++++++++++++++------------
> >>  drivers/hv/Kconfig          |   1 +
> >>  2 files changed, 77 insertions(+), 35 deletions(-)
> >
> > Tested on nested root partition.
> >
> > Looks good, thanks.
> >
> > Tested-by: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
> > Reviewed-by: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
> 
> I assume this goes through the hyper-V tree.
> 
> Acked-by: Thomas Gleixner <tglx@...utronix.de>

No problem -- applied to hyperv-next.

Thank you Nam and Thomas.