From patchwork Mon Oct 16 15:19:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13423565 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 3DF23CDB465 for ; Mon, 16 Oct 2023 15:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233883AbjJPPTy (ORCPT ); Mon, 16 Oct 2023 11:19:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233867AbjJPPTr (ORCPT ); Mon, 16 Oct 2023 11:19:47 -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 50207F1 for ; Mon, 16 Oct 2023 08:19:42 -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=iXDULQVzCobMyEZ4WUylbwZd7CUi+M/tuPLUTKt/3jw=; b=l1d5jbcw6JNVUwXd23LtcOWIrz awoQAWR2TcM4l7zFuNYfHDL5IW5doK4mER0sDrz9GFfi7g/6TGn1GKF7Nh4SXaBj7lExkZqV/6OBu BFw1UTrhAyKXsOt9PwCTU2pMxqKJdP2htFgualbxn+lvN/uSw/zpRypzgvobUd3b+niKIDlRnOUN0 y25iFrORunLd1zKmTJ4gAmMrkYqYU3tM4LCEhYMpEqbeBcCd11W2GY5HtBdadVn3PG+6tuK2XfGfg nLsgelc99k1Us9mOk0LZPdAD9438EocKtKfbD+cMKYAq2PLkAUu3jedsBUI2LXJKDiK3BJ8DZHlBK 82Uotnsw==; 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 1qsPNB-0067AH-2I; Mon, 16 Oct 2023 15:19:15 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1qsPNB-0005nK-2S; Mon, 16 Oct 2023 16:19:13 +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 , David Woodhouse , Marcelo Tosatti , qemu-block@nongnu.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org Subject: [PATCH 04/12] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID Date: Mon, 16 Oct 2023 16:19:01 +0100 Message-Id: <20231016151909.22133-5-dwmw2@infradead.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231016151909.22133-1-dwmw2@infradead.org> References: <20231016151909.22133-1-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 f6c7f7e268..8bdbdcdffe 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1887,6 +1887,10 @@ 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);