From patchwork Wed Oct 25 14:50:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13436352 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E903EC0032E for ; Wed, 25 Oct 2023 14:51:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344709AbjJYOv5 (ORCPT ); Wed, 25 Oct 2023 10:51:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58332 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344690AbjJYOvg (ORCPT ); Wed, 25 Oct 2023 10:51:36 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7F38D54 for ; Wed, 25 Oct 2023 07:51:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=3ol/nIDXbsJDFoVLEuQ1afcMOMk6Tbtz3hrJIXJZBzY=; b=NFNK6k1K2fwKP7Ocg+F7iiwScE G0hoCGS6u4vyAMHIPvezrI8DEw/b9DGG3KWI2GSeG63nYSvAU5oVobvdrxD+wwKz+9P6PaJC/SaQ5 mYNdvDv+InJs82hkPJ+9clbUM9Ko2hDQb35OCg6149Mw9Ioar6ATzO6+CTanCbjudKYK+HHlwEkWv xfHpwHiIA9XDtWJ0deiMHNEUuu/CrzXdy1mN2k9BPitoNbt7OKPcvRhTo8Z0nj1vmvJKOa3nrKRfl r1CwhZVWJW77Cim7VL7UBUjXPm5P+XQVhgUAAWxEA3HOsImeW52PfGmuNr8sqrD9dtlAOcnf5zNjR S2yC23jw==; Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qvfDZ-00GPLz-00; Wed, 25 Oct 2023 14:50:52 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1qvfDY-002dEe-1i; Wed, 25 Oct 2023 15:50:44 +0100 From: David Woodhouse To: qemu-devel@nongnu.org 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, Bernhard Beschow , Joel Upham Subject: [PATCH v3 11/28] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID Date: Wed, 25 Oct 2023 15:50:25 +0100 Message-Id: <20231025145042.627381-12-dwmw2@infradead.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231025145042.627381-1-dwmw2@infradead.org> References: <20231025145042.627381-1-dwmw2@infradead.org> MIME-Version: 1.0 Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.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 e7c054cc16..8f93a0b5fc 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1889,6 +1889,10 @@ 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);