From patchwork Thu Oct 19 15:40:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13429432 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 02F42CDB482 for ; Thu, 19 Oct 2023 15:41:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346361AbjJSPlc (ORCPT ); Thu, 19 Oct 2023 11:41:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346226AbjJSPlD (ORCPT ); Thu, 19 Oct 2023 11:41:03 -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 C767B12F for ; Thu, 19 Oct 2023 08:41:01 -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=nvRcjzw6M/XXwV3zCk205Erqe071/IUToCid+vBMiOQ=; b=h7T/JZlXs4eYvi1D1r24IXvFZf eQnVE76BMO469Wvs1/Uyq8bo4pP8Oil1b3lK53uwNMfi/cWcct9pw89KU2TCiHFjLLJXAyh2oooj2 9nPGS3gW6k1clnADbrXpN9PZ4G+kyLAPAZTjw7p/X2f3YiHWie8G1j0XlzkF07La89N9IyaA2rOdU Emvs6HGrzswQq1fb7HLyn4LLiprMl/woS11v1T4GUKtd0WBpO+/Lcf1AoyBXnzharnjokIaVKgCUx KXewbqi1OP/EnfsDd3SAx9ocBT8oG5pf8XmIybKckp+iiV9/0IBKNgJwmBPg82PyeLpGVJRtMC3lc RwCZ1nQQ==; 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 1qtV8M-009yCq-2Z; Thu, 19 Oct 2023 15:40:27 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1qtV8M-000PuF-12; Thu, 19 Oct 2023 16:40:26 +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 , Richard Henderson , Eduardo Habkost , "Michael S. Tsirkin" , Marcel Apfelbaum , Jason Wang , Marcelo Tosatti , Cleber Rosa , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Wainer dos Santos Moschetta , Beraldo Leal , qemu-block@nongnu.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Bernhard Beschow , Joel Upham Subject: [PATCH v2 09/24] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID Date: Thu, 19 Oct 2023 16:40:05 +0100 Message-Id: <20231019154020.99080-10-dwmw2@infradead.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231019154020.99080-1-dwmw2@infradead.org> References: <20231019154020.99080-1-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 --- 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 ab72bcdfad..bd774b3e02 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);