linux-kernel - Re: [PATCH v1] kvm: x86: implement PV send

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CACGkMEv0yHC7P1CLeB8A1VumWtTF4Bw4eY2_njnPMwT75-EJkg@mail.gmail.com>
Date: Fri, 18 Jul 2025 15:52:30 +0800
From: Jason Wang <jasowang@...hat.com>
To: Cindy Lu <lulu@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>, Vitaly Kuznetsov <vkuznets@...hat.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, 
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, 
	"Peter Zijlstra (Intel)" <peterz@...radead.org>, "Kirill A. Shutemov" <kas@...nel.org>, "Xin Li (Intel)" <xin@...or.com>, 
	Rik van Riel <riel@...riel.com>, "Ahmed S. Darwish" <darwi@...utronix.de>, 
	"open list:KVM PARAVIRT (KVM/paravirt)" <kvm@...r.kernel.org>, 
	"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] kvm: x86: implement PV send_IPI method

On Fri, Jul 18, 2025 at 2:25 PM Cindy Lu <lulu@...hat.com> wrote:
>
> From: Jason Wang <jasowang@...hat.com>
>
> We used to have PV version of send_IPI_mask and
> send_IPI_mask_allbutself. This patch implements PV send_IPI method to
> reduce the number of vmexits.
>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> Tested-by: Cindy Lu <lulu@...hat.com>

I think a question here is are we able to see performance improvement
in any kind of setup?

Thanks