From patchwork Wed Dec 1 20:51:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 1562460 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=F3iPys7L; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4J4BLd6kmqz9sCD for ; Thu, 2 Dec 2021 08:00:25 +1100 (AEDT) Received: from localhost ([::1]:56474 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1msWiD-0003zU-S5 for incoming@patchwork.ozlabs.org; Wed, 01 Dec 2021 16:00:22 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59904) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1msWZa-0003Rd-AQ for qemu-devel@nongnu.org; Wed, 01 Dec 2021 15:51:27 -0500 Received: from casper.infradead.org ([90.155.50.34]:57786) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1msWZY-0000Rm-6C for qemu-devel@nongnu.org; Wed, 01 Dec 2021 15:51:25 -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=aVzaDM2UnW4cE1jWgxkpgoXKV4dI8NPpp1xVgqgehY8=; b=F3iPys7L38phlNITEcTZVAcb6A RYmyP5mSjMgCXAKmRB0zUoT2G2i/M9FndjAvt7haLfS7dPbRtNWC/xciklcBU2oD7OM+oNR5l0xVQ HuKJoFLyAxoqLul2axFSlQmCDW3PILchHwVIL3LFA0WRepjegcoxhZWUJZ+taNoe5tEpWj+cY1QRa hUyXPtOgUUv92ZBndhaVycG3WQOlfNUueAFUVH3NKkkCmLQndX5TAwQufXqk/OXppwnIWOwoJho9n Tg1FuxGdq+FKOy/fOW3QX010yUefNEaAzvn6ydjm5BoomD43n0FlqDHIF8p4I+r6Qte7uA/iWuIs7 4H4YygWQ==; Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1msWZN-000wRW-UH; Wed, 01 Dec 2021 20:51:14 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1msWZN-000Euz-EH; Wed, 01 Dec 2021 20:51:13 +0000 From: David Woodhouse To: qemu-devel@nongnu.org Subject: [PATCH 2/2] intel_iommu: Only allow interrupt remapping to be enabled if it's supported Date: Wed, 1 Dec 2021 20:51:13 +0000 Message-Id: <20211201205113.57299-2-dwmw2@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211201205113.57299-1-dwmw2@infradead.org> References: <20211201205113.57299-1-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=90.155.50.34; envelope-from=BATV+91c63c4280be7436ccc6+6674+infradead.org+dwmw2@casper.srs.infradead.org; helo=casper.infradead.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, SPF_HELO_NONE=0.001, SPF_NONE=0.001 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: , Cc: Eduardo Habkost , "Michael S. Tsirkin" , Jason Wang , Richard Henderson , Peter Xu , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: David Woodhouse We should probably check if we were meant to be exposing IR, before letting the guest turn the IRE bit on. Signed-off-by: David Woodhouse Acked-by: Jason Wang Reviewed-by: Peter Xu --- hw/i386/intel_iommu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index ffc852d110..297e1972f8 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2197,6 +2197,7 @@ static void vtd_handle_gcmd_ire(IntelIOMMUState *s, bool en) /* Handle write to Global Command Register */ static void vtd_handle_gcmd_write(IntelIOMMUState *s) { + X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(s); uint32_t status = vtd_get_long_raw(s, DMAR_GSTS_REG); uint32_t val = vtd_get_long_raw(s, DMAR_GCMD_REG); uint32_t changed = status ^ val; @@ -2218,7 +2219,8 @@ static void vtd_handle_gcmd_write(IntelIOMMUState *s) /* Set/update the interrupt remapping root-table pointer */ vtd_handle_gcmd_sirtp(s); } - if (changed & VTD_GCMD_IRE) { + if ((changed & VTD_GCMD_IRE) && + x86_iommu_ir_supported(x86_iommu)) { /* Interrupt remap enable/disable */ vtd_handle_gcmd_ire(s, val & VTD_GCMD_IRE); }