From patchwork Tue Nov 7 09:21:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13448179 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A39D310A03 for ; Tue, 7 Nov 2023 09:22:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="cObvXjOX" Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 381C0C6 for ; Tue, 7 Nov 2023 01:22:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=Y5nSkWJw65PHeAdiBedCwu3yPseNBbhZrt6JYWluBCc=; b=cObvXjOX3/RyB6nEUD8NqAqbho 39j7fyu3Hl8bNr15LpLDYX0ZGxtwHXjjV+NdfnWKC7CY9oyEehxXZqySY42QsnXQslNle+nxsQfb5 pnh74iKyjXT+C60fLp7KpqsOB5oSZ1bDgGqQezRHHSNcdpUcShuVmd0GcIcn98KvP6Ewf+dGJ47RA g2p+0NOE3xCOBKvASAEP2cZ0hivbriWRBXT5LyLFXSzeKQIzs3gB2bGDGo54HGv7E3wHDNvV2w27h 2NDVdMQ3EwxitW4Vm7lKwG0aSt1I6OIYLSUwbOovEGtv6Hlx9XaqCH9mUkh6JNLa2WtzxDH/LWKQ5 5N64zJsg==; Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1r0IHN-00BPkN-EV; Tue, 07 Nov 2023 09:21:50 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96.2 #2 (Red Hat Linux)) id 1r0IHN-001hK6-2O; Tue, 07 Nov 2023 09:21:49 +0000 From: David Woodhouse To: qemu-devel@nongnu.org, Stefan Hajnoczi Cc: Kevin Wolf , Hanna Reitz , Stefano Stabellini , Anthony Perard , Paul Durrant , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , "Michael S. Tsirkin" , Marcel Apfelbaum , Richard Henderson , Eduardo Habkost , Jason Wang , Marcelo Tosatti , qemu-block@nongnu.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org Subject: [PULL 04/15] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID Date: Tue, 7 Nov 2023 09:21:36 +0000 Message-ID: <20231107092149.404842-5-dwmw2@infradead.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231107092149.404842-1-dwmw2@infradead.org> References: <20231107092149.404842-1-dwmw2@infradead.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html From: David Woodhouse This will allow Linux guests (since v6.0) to use the per-vCPU upcall vector delivered as MSI through the local APIC. Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant --- target/i386/kvm/kvm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 770e81d56e..11b8177eff 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1837,6 +1837,10 @@ int kvm_arch_init_vcpu(CPUState *cs) c->eax |= XEN_HVM_CPUID_VCPU_ID_PRESENT; c->ebx = cs->cpu_index; } + + if (cs->kvm_state->xen_version >= XEN_VERSION(4, 17)) { + c->eax |= XEN_HVM_CPUID_UPCALL_VECTOR; + } } r = kvm_xen_init_vcpu(cs);