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: 13448152 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5EB55C4167D for ; Tue, 7 Nov 2023 09:23:45 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r0IHs-0005He-Jn; Tue, 07 Nov 2023 04:22:20 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r0IHm-0005D6-RQ; Tue, 07 Nov 2023 04:22:15 -0500 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r0IHX-0001Mb-Hu; Tue, 07 Nov 2023 04:22:13 -0500 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> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=2001:8b0:10b:1236::1; envelope-from=BATV+0fd401c0b30749933da3+7380+infradead.org+dwmw2@casper.srs.infradead.org; helo=casper.infradead.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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);