From nobody Wed Dec 17 06:02:26 2025 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4950C24EA98 for ; Fri, 4 Apr 2025 19:41:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743795693; cv=none; b=Bj1LRq195Lhpgch3aXAFbMUhjMefPGkb9lBVGM5ZqfG0fseWaskYVYrKsb1NH4vEjEhdpqNTNWahUDyM01qdBQXY5Iux6gXuDJCNGfW0xt60QYnGBcWBjiI4tjYY43MhpM5MrTb4sxQaihckDAVE8dMl/ltolFN45p+VihtM8nE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743795693; c=relaxed/simple; bh=LM/a78fswUxarIaB9yJdchQ9AVFZwyJ7vf9uPLLFAxs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=NJQOkA3f59m+Ss6T0zHINYceP9xC/bfDnkFoJBOOEy6iYI1IksMR6DOc3vrN+Z/73n5V5Z++kTwTNadp7tdZKhRnTGC5v0IBeqjmyngdBRrMc2io/TfKB4T4mepeR3ukB6aGOzjGJcOWg1ujqvO+xhw1b1Wn3QDTAyjZteou31Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=IsVNqCQr; arc=none smtp.client-ip=209.85.210.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="IsVNqCQr" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-7369b559169so1803642b3a.1 for ; Fri, 04 Apr 2025 12:41:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1743795690; x=1744400490; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=WUo/P/nbSyKSB7hDI08Ajk4szbLYpfhAgRQ1J5OUkMU=; b=IsVNqCQr+F3fdQUnityMBvVU2Jl2S0/RjIgEADXtzlT7I5ZvpQ3e81+BbkKJJZSMEc 8/5i4ww2Af+xLJ2JWrryZoHNYNR+CWuZZbw5yU/9kR/cIF/xEm9tnKB5EbB/m7eOM+Zr t9Nbx1KR3I8D9c9a/gUJ0nvge/qq3kC3t0UR5MadRoDgwaZhDDgwBAG5rIACDRzqL5GB FtUA/C6LugbqUQ8Trgw/KhwQ2Vvozcro2VqHe47vecLWKfkhvMULWEdMCCBncTfDsDCQ wDhQ+PAbSECCAxTlRKN1ZXXqLvWf/5LCK1J74ZF7S1/K9sBFpJsOT/JDwxT+OBUOA5FN OXag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743795690; x=1744400490; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=WUo/P/nbSyKSB7hDI08Ajk4szbLYpfhAgRQ1J5OUkMU=; b=Q2uUuLMMecOWTLV4PKtYDbuxoYaGizuqc8KvoMJuFDKBYCynHsSgiZSEou+Igb6wxO dKX3UpwWImIM9MpnfJRy/gseYnuLGqg9SIxN3m/gQ+dK3pCs88DeJ/9oTao1l6Prtt4l 83UQ5iqSunyMm118JXbKw4Jb3HV/CM/QmcG9taKzV/ILXsuwXJgIHIyi8QVeB8qGO17E W1Xudfoho9eBA6+UjxLz7gVZYIGUf7kdVYO132vCJuWMR7IUrPb1PC93Tg6ccWGTBkvx 7ujsqrwUyXgSutP0gK7cZTviTAT4i9JCiJeaplhlSRidYufgGT3HeakBg0t1e096Uzr3 M/vQ== X-Forwarded-Encrypted: i=1; AJvYcCVJ0yaxmODvduvfCCx7HCvgiSKq0/g2tTOYhkzhI0zYKj1Kkq0dedbpuJtWzEpY4Sn431SWqlIBXJbhRag=@vger.kernel.org X-Gm-Message-State: AOJu0Yzd5RkOoamXWFJoTusra6ku30C8pdcos85GiAk4UKo2kuCycK3X VQ93eE6vTArKUQOAtgdbIoCOmcMxng0LqurhAllIQTpdpz0DDCRBE2h8Zm/YFXo/wSL4qbXmWxP a+g== X-Google-Smtp-Source: AGHT+IFrffkAJKPjpzU/UB+RZgd+9eYfpIMh5YaMNutNyipzajp2Id7VaNjJc8C8Wc5drn94Lg1LW0x5Xkw= X-Received: from pfbld6.prod.google.com ([2002:a05:6a00:4f86:b0:737:30c9:fe46]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:130a:b0:725:96f2:9e63 with SMTP id d2e1a72fcca58-739e4b7b2bdmr6930633b3a.24.1743795690483; Fri, 04 Apr 2025 12:41:30 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 4 Apr 2025 12:39:15 -0700 In-Reply-To: <20250404193923.1413163-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250404193923.1413163-1-seanjc@google.com> X-Mailer: git-send-email 2.49.0.504.g3bcea36a83-goog Message-ID: <20250404193923.1413163-61-seanjc@google.com> Subject: [PATCH 60/67] iommu/amd: WARN if KVM calls GA IRTE helpers without virtual APIC support From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Joerg Roedel , David Woodhouse , Lu Baolu Cc: kvm@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Maxim Levitsky , Joao Martins , David Matlack Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" WARN if KVM attempts to update IRTE entries when virtual APIC isn't fully supported, as KVM should guard all such calls on IRQ posting being enabled. Signed-off-by: Sean Christopherson --- drivers/iommu/amd/iommu.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index a881fad027fd..2e016b98fa1b 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -3793,8 +3793,10 @@ int amd_iommu_update_ga(int cpu, void *data) struct amd_ir_data *ir_data =3D (struct amd_ir_data *)data; struct irte_ga *entry =3D (struct irte_ga *) ir_data->entry; =20 - if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) || - !entry || !entry->lo.fields_vapic.guest_mode) + if (WARN_ON_ONCE(!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))) + return -EINVAL; + + if (!entry || !entry->lo.fields_vapic.guest_mode) return 0; =20 if (!ir_data->iommu) @@ -3813,7 +3815,10 @@ int amd_iommu_activate_guest_mode(void *data, int cp= u) struct irte_ga *entry =3D (struct irte_ga *) ir_data->entry; u64 valid; =20 - if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) || !entry) + if (WARN_ON_ONCE(!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))) + return -EINVAL; + + if (!entry) return 0; =20 valid =3D entry->lo.fields_vapic.valid; @@ -3842,8 +3847,10 @@ int amd_iommu_deactivate_guest_mode(void *data) struct irq_cfg *cfg =3D ir_data->cfg; u64 valid; =20 - if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) || - !entry || !entry->lo.fields_vapic.guest_mode) + if (WARN_ON_ONCE(!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))) + return -EINVAL; + + if (!entry || !entry->lo.fields_vapic.guest_mode) return 0; =20 valid =3D entry->lo.fields_remap.valid; --=20 2.49.0.504.g3bcea36a83-goog