From nobody Thu Dec 26 13:39:14 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1732880533; cv=none; d=zohomail.com; s=zohoarc; b=GS0ykGkD8LQC3hPvT9XYMVVaZ/MJ7eHzAqlCSKiAS0+sGktp2TmLy42aV608QkNx7kVDFWa0tBQ6Iq8jfZn+8T2fAivELN4q8NkKw+x24bNIgmr9iGGm9B354KuMYmz06hNUDVVdA5zUVLKJ5rQK5T3Z1kfUO3MB/uBKOU8P+qo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1732880533; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=/o+BS+OcIItedzzG1AU2rEt3OTvDpG5A87iPkWMu5Rw=; b=LTN4TKeeYD6KXT/neqvEA0d8cPcW/mWnB5o6V6XjZCMpc9b6bZgSb4zA+JTrQNmTWZbdVEY/1CLhL75VLx2jlT023IQe3hgSmZnkqHr6zuySByYsaw/mPyjMQK7lhsGfWoNCO6gkip+zDL/APm9mxoqRlBf5mBWWYfUTeOQdP8U= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1732880533729340.7039811524644; Fri, 29 Nov 2024 03:42:13 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tGzNA-0001r5-0E; Fri, 29 Nov 2024 06:41:20 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tGzN9-0001qw-5r for qemu-devel@nongnu.org; Fri, 29 Nov 2024 06:41:19 -0500 Received: from mail-wm1-x330.google.com ([2a00:1450:4864:20::330]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1tGzN7-0005hH-2A for qemu-devel@nongnu.org; Fri, 29 Nov 2024 06:41:18 -0500 Received: by mail-wm1-x330.google.com with SMTP id 5b1f17b1804b1-434a10588f3so11139325e9.1 for ; Fri, 29 Nov 2024 03:41:16 -0800 (PST) Received: from localhost.localdomain (88-187-86-199.subs.proxad.net. [88.187.86.199]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434aa763a59sm81750635e9.11.2024.11.29.03.41.13 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 29 Nov 2024 03:41:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1732880475; x=1733485275; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=/o+BS+OcIItedzzG1AU2rEt3OTvDpG5A87iPkWMu5Rw=; b=df1JmmMwvVSrqQaIZXpUB30wyDT4TgznRFB/O5vJ+wIViPgZEqMIwdOlB5Bb/6NAKs GSxE4k4K8MzCW4Q8AcFsM5htj5blWd2ktPmJKdBCcdpRzmzwcMHjNMFMHjMg+mQn2oDm eDX+18sp83whdhGRwg8Ocz3aK4IXwnpLDr/NGfOAhKaIAWsLXsrl8mu0IOvxxz1x7oUg ztEygHSEaCU4DnsqP9QFDq52sCrSq5FEGLXRvM+oEtp4qHWLABpvSmyYqo+yJQ1oSGM1 YsBc8Q/NloOrsVzrEmcZR5wC8Q+uN+/0yJo8XNmLFfrAgLQvJNlXORTvWHuW7DcbrD1G HmRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732880475; x=1733485275; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=/o+BS+OcIItedzzG1AU2rEt3OTvDpG5A87iPkWMu5Rw=; b=aPvKZubGdjebluKgwrIFKMSsLeFhTOTRhCuHtOfjZ2xoJd5CH/V0VOJtZ+S+Y9om8p N7wgocH94t7vHNdFCr5L9ophCudRSjc1ThJSPAS77n+4d3E4/A8IIye8YIFanfmQYvUE 1uX3ATgGGBb/asym4W8f6Sk67/y8ko1/ymHa5MCqULiKAsZIXO/SFdoQT5SmaQvbdn75 u5QeLyH7hraENDGNBOVkK3RI6XAMUmKFbIb5k6VNyHRMZT1u1aTTMdvP8sr85vvKgURy JFE1b40piEAFxtm/mGJGrANArY6aSpNMReDuzVvDDYXEiRTfpdXPfWR+nxGwMDl8Wxuy CDJw== X-Gm-Message-State: AOJu0YykLMfdDvkxA/4xuPraQ4BgTymI1p4WaJhv5d0RMkE9mp/KDp2H ODJ9bCprr4H4aUOHo2uDKztMBNYztLrICal62g/iv3NabHjmjlnEJw0Bg6qoFqvXh/GNjJg7Pvo i X-Gm-Gg: ASbGncsLiyafx6wqSyJShBQ4pfBOuLOl18CDziH4P/8ulJW2XHVwQZQIE/HpoDAwAam y2QOEHpBMV8LtEItX91ja0feGKmLnuNzzgHe9EJpSjBBOXwVdYL57VL+uA2L9bqk+YcYg8DfLHz 2xC4n2DyI8KVn8wU3jSclIdczSvgCND5NoQKQbjHxqUEApCaF6g3Qmfv4+cFKrJSkwWC84Y2HQD pSoPj0AJ9GZ/1aDrh+Sx2uq0rNhVP3KMImfQz1TDnAWxvXx4umhI3fXbIERa+NEbctjTi2iswyW lFn8l98RZRuO7iMTVJ8A89tEvIqYhw== X-Google-Smtp-Source: AGHT+IE1lcy+shPR/HEchi9kcSQgIZ8rQ6wiHT9NE9NxJwz3N+RDB/IwwOJHwIOhJ+qOiw3unJ0miQ== X-Received: by 2002:a05:600c:1f06:b0:431:2b66:44f7 with SMTP id 5b1f17b1804b1-434a9df7a8dmr114281755e9.31.1732880474951; Fri, 29 Nov 2024 03:41:14 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Daniel Hoffman , Marcel Apfelbaum , Paolo Bonzini , Eduardo Habkost , "Michael S. Tsirkin" , Vasant.Hegde@amd.com, Richard Henderson , Sairaj Kodilkar , Zhao Liu , Santosh Shukla , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Phil Dennis-Jordan Subject: [PATCH-for-9.2] hw/i386/amd_iommu: Fix XTSup feature check when KVM is not available Date: Fri, 29 Nov 2024 12:41:13 +0100 Message-ID: <20241129114113.33215-1-philmd@linaro.org> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=philmd@linaro.org; helo=mail-wm1-x330.google.com 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1732880535783019100 When building with debug on a host which doesn't provide KVM, we get: C compiler for the host machine: clang (clang 16.0.0 "Apple clang version 16.0.0 (clang-1600.0.26.4)") C linker for the host machine: clang ld64 1115.7.3 Host machine cpu family: aarch64 Host machine cpu: aarch64 Compilation host CPU : aarch64 host endianness : little C compiler : clang Host C compiler : clang C++ compiler : NO Objective-C compiler : clang Rust support : NO CFLAGS : -g -O0 User defined options optimization : 0 ... [1589/1590] Linking target qemu-system-x86_64-unsigned Undefined symbols for architecture arm64: "_kvm_enable_x2apic", referenced from: _amdvi_sysbus_realize in hw_i386_amd_iommu.c.o ld: symbol(s) not found for architecture arm64 In commit 9926cf34de5 ("target/i386: Allow elision of kvm_enable_x2apic()") we removed this symbol stub globally (debug and optimized build profiles). All code wanted to access it must be protected by a check on kvm_enabled(). See the similar check in x86_cpus_init() added by commit c04cfb4596a ("hw/i386: fix short-circuit logic with non-optimizing builds"). In order to fix this linking error, protect the whole block checking the XTSup feature with a check on whether KVM is enabled. Since x86_cpus_init() already checks APIC ID > 255 imply kernel support for irqchip and X2APIC, remove the confuse and unlikely reachable "AMD IOMMU xtsup=3Don requires support on the KVM side" message. Fix a type in "configuration" in error message. Fixes: b12cb3819baf (amd_iommu: Check APIC ID > 255 for XTSup) Reported-by: Phil Dennis-Jordan Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- Alternative fix to: - https://lore.kernel.org/qemu-devel/20241113144923.41225-1-phil@philjordan= .eu/ - https://lore.kernel.org/qemu-devel/20241114114509.15350-1-sarunkod@amd.co= m/ --- hw/i386/amd_iommu.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c index 13af7211e11..39b6d6ef295 100644 --- a/hw/i386/amd_iommu.c +++ b/hw/i386/amd_iommu.c @@ -1652,13 +1652,8 @@ static void amdvi_sysbus_realize(DeviceState *dev, E= rror **errp) memory_region_add_subregion_overlap(&s->mr_sys, AMDVI_INT_ADDR_FIRST, &s->mr_ir, 1); =20 - /* AMD IOMMU with x2APIC mode requires xtsup=3Don */ - if (x86ms->apic_id_limit > 255 && !s->xtsup) { - error_report("AMD IOMMU with x2APIC confguration requires xtsup=3D= on"); - exit(EXIT_FAILURE); - } - if (s->xtsup && kvm_irqchip_is_split() && !kvm_enable_x2apic()) { - error_report("AMD IOMMU xtsup=3Don requires support on the KVM sid= e"); + if (kvm_enabled() && x86ms->apic_id_limit > 255 && !s->xtsup) { + error_report("AMD IOMMU with x2APIC configuration requires xtsup= =3Don"); exit(EXIT_FAILURE); } =20 --=20 2.45.2