From patchwork Thu Oct 19 15:39:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13429423 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 1D576CDB483 for ; Thu, 19 Oct 2023 15:41:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346405AbjJSPlL (ORCPT ); Thu, 19 Oct 2023 11:41:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346364AbjJSPk7 (ORCPT ); Thu, 19 Oct 2023 11:40:59 -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 8AF1318D for ; Thu, 19 Oct 2023 08:40:57 -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=2nqUTV3vUpOx9clV41PRsXO9Zf0sXlL57tnkVmGApug=; b=IxYegd780SmdgDUUbQTnWSd/ai wuPPAJoA515FdGO8tU1vSZrNsyj+Eu6YIkOsX/w4u33wqDnGK/ZwF1FZAXaacLiotME7DJPR6U/Jt OuDfbp0EviQEM+jKnxB2735BGSNGjQPB5fQO0QhthLqzSiUxPJRE6nEg1YISAF7SGMMqZmiK5VeSg dzR41WsF4hHTtOF4Yx+UDPvs6VQbtX5ykHz8fZztlFt0rXHlMPaiXHGv2MgylP5snh0qflWdWsndn GcidSGgVKwpcNJ7umDEr2Y0Ng2MicE/qap/rao+XOsK2w46sGJSmaj6tItgKWDiX6XExPu+61OUBD r/Ld6nOw==; 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-009yCh-2Y; 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 1qtV8L-000Ptk-2O; Thu, 19 Oct 2023 16:40:25 +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 02/24] i386/xen: fix per-vCPU upcall vector for Xen emulation Date: Thu, 19 Oct 2023 16:39:58 +0100 Message-Id: <20231019154020.99080-3-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 The per-vCPU upcall vector support had two problems. Firstly it was using the wrong hypercall argument and would always return -EFAULT. And secondly it was using the wrong ioctl() to pass the vector to the kernel and thus the *kernel* would always return -EINVAL. Linux doesn't (yet) use this mode so it went without decent testing for a while. Fixes: 105b47fdf2d0 ("i386/xen: implement HVMOP_set_evtchn_upcall_vector") Signed-off-by: David Woodhouse --- target/i386/kvm/xen-emu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 0055441b2e..619240398a 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -306,7 +306,7 @@ static int kvm_xen_set_vcpu_callback_vector(CPUState *cs) trace_kvm_xen_set_vcpu_callback(cs->cpu_index, vector); - return kvm_vcpu_ioctl(cs, KVM_XEN_HVM_SET_ATTR, &xva); + return kvm_vcpu_ioctl(cs, KVM_XEN_VCPU_SET_ATTR, &xva); } static void do_set_vcpu_callback_vector(CPUState *cs, run_on_cpu_data data) @@ -849,8 +849,7 @@ static bool kvm_xen_hcall_hvm_op(struct kvm_xen_exit *exit, X86CPU *cpu, int ret = -ENOSYS; switch (cmd) { case HVMOP_set_evtchn_upcall_vector: - ret = kvm_xen_hcall_evtchn_upcall_vector(exit, cpu, - exit->u.hcall.params[0]); + ret = kvm_xen_hcall_evtchn_upcall_vector(exit, cpu, arg); break; case HVMOP_pagetable_dying: