From nobody Sun Feb 8 01:51:41 2026 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (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 010C514C5AF for ; Fri, 2 Feb 2024 18:07:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706897235; cv=none; b=cA/cYTJAtz4ahXP8ry35HXIOK3gVuHxVNlgGQySqiOaD7JbaORU+mMWDXLN/RDZGkVomYhcfpbLXFleVk5gY65ZAwvfujPPcEpx4CwDQyITPFVzP7sUMHe+rxKsgxMr0Bqx66TUYyWXZ1ZO4ELriJtRipt/a7sFz5Ijl+/u/GEg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706897235; c=relaxed/simple; bh=WyNQGE65iXrMr9yngCo4GWOgGd/sXGPgehCp3iXlLL4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=lAvrSddEmPrsjNv+a6mhoEkIi7FvLs6KPac9p5f+ykcY61QCCfKSy8zKKpMU4XIuotZToQys9IChL1mT9HBzJwf//mwzpBVUbyrzxRyxCnOn5XRo2JNrc3M/oxAkOAulplkNR1FrWfyDL/YXxvXsc4MzklNP1N7bbdVioJzA01o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com; spf=pass smtp.mailfrom=rivosinc.com; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b=H62nDHHG; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b="H62nDHHG" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-6d9f94b9186so1878244b3a.0 for ; Fri, 02 Feb 2024 10:07:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1706897233; x=1707502033; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9Yyrip3T2gRBwGLvYCLpLjUFISir/avz/b+c2luLHGY=; b=H62nDHHGZYda9okCf2JfKZCp+55LjIpMigZ5Y5jAtyqGH9J1UzEB356D3pdmoyujqj x/0Krd6MFnGDgwUhTpgOujbbhdnw7AMR5nmplvXz9vmkO+/PHVqUdswaMm0R5Lmq4OOD r9wGLBVANxD8YP7S6XMIWtTTKVvrOiUjD1Xxo/qaN/k8CUHIZOcwVgMJfk3Nv2+jTX5y w7D34t2HgHPv81SjoaW58JJ3PjZL6v/ELD2sFFLIR6rrbK5o1397KBCDrX2Eiu2AfM3X 94fyHHWuDlGxfXtFG/aL4LpY67jD+Fe2Lztx8kYLULlNFKK/TsKfEuCiQLNJDWF7b5ze d6wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706897233; x=1707502033; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9Yyrip3T2gRBwGLvYCLpLjUFISir/avz/b+c2luLHGY=; b=RGLK0gTgpgxkng1al8STMQr0R/husjlP3bYPZilUfh0VBCfYC5Qa41St+ImKUqhpDv jL6Kz6rJl3eHAg0/pV/zKsLY47bNq5J3ZAQH3L1pPi7OCw+qdDkOIr2HD4STAwzKYxIu SxdiA/Ntz/3EguP06HQ1aOuWJOW3DyNfKMUVWz628bidpwEHTCqV4yw93TTVw0EAuHgh iLt6UHYiTkILemFy1Imb/MiZlEvYtCy8jlpkJ6L2a15PRmoGW7NVDXIXKYeA2m401zV9 ObeaGAbeQ66TB2hsjYFZW7KKQ4M7r10My6sz6YinYjsKluM96dh7dsCWnhZJzAcWaJ4p AymQ== X-Gm-Message-State: AOJu0YwwhRXrZnKh+DI9jKh7FV4PbkHYIU3Hg+GJL5EChYg+c8WDcwJZ ZMtQvAIxeMXnyx5n3th7BALmZUEwXYUF/vXzlKglPDCqGgRKjyRoIsqMOON2gYY= X-Google-Smtp-Source: AGHT+IG+xYxv+LwajPk4C5nz4DY2qxbK7PqAKE+WcH5FBlppsmmhxviIkgQ4jI0JLjaR+O7wz2Jigg== X-Received: by 2002:aa7:9e11:0:b0:6ce:751b:81d9 with SMTP id y17-20020aa79e11000000b006ce751b81d9mr3346175pfq.9.1706897233322; Fri, 02 Feb 2024 10:07:13 -0800 (PST) X-Forwarded-Encrypted: i=0; AJvYcCU5uQRhhNr4F5Tr/eDx4VZKGJkZm2fFKhzvmErVJFdhN1keJw/2/IIbPia/PAaM3mkVII16Nt5yvabl0M3Zh8DUWKa04jN+PvoVj8IbhmJzrBJJb9Arr0kaYy98U+F3QdLE5FXpj6PMaQqSExRB9qZR4DdEU4G0klU6A2Yo5YCioE6HI4Uq69jHHuQmm1KAoMudrIvnpqJDFjQ+aG90RJGeKLQrNFSBnP1dKqm3fulhCWqUkrdAXfbWK+vNySD4eg8DV/zQ0+5yqh++ Received: from abrestic.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id s26-20020aa78d5a000000b006ddd31a701esm1989267pfe.19.2024.02.02.10.07.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Feb 2024 10:07:12 -0800 (PST) From: Andrew Bresticker To: Ard Biesheuvel Cc: Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Andrew Bresticker Subject: [PATCH v2 1/2] efi: runtime: Fix potential overflow of soft-reserved region size Date: Fri, 2 Feb 2024 10:07:03 -0800 Message-Id: <20240202180704.808766-2-abrestic@rivosinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240202180704.808766-1-abrestic@rivosinc.com> References: <20240202180704.808766-1-abrestic@rivosinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" md_size will have been narrowed if we have >=3D 4GB worth of pages in a soft-reserved region. Signed-off-by: Andrew Bresticker Acked-by: Palmer Dabbelt --- v2: use u64 instead of unsigned long --- drivers/firmware/efi/arm-runtime.c | 2 +- drivers/firmware/efi/riscv-runtime.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-= runtime.c index 83f5bb57fa4c..83092d93f36a 100644 --- a/drivers/firmware/efi/arm-runtime.c +++ b/drivers/firmware/efi/arm-runtime.c @@ -107,7 +107,7 @@ static int __init arm_enable_runtime_services(void) efi_memory_desc_t *md; =20 for_each_efi_memory_desc(md) { - int md_size =3D md->num_pages << EFI_PAGE_SHIFT; + u64 md_size =3D md->num_pages << EFI_PAGE_SHIFT; struct resource *res; =20 if (!(md->attribute & EFI_MEMORY_SP)) diff --git a/drivers/firmware/efi/riscv-runtime.c b/drivers/firmware/efi/ri= scv-runtime.c index 09525fb5c240..01f0f90ea418 100644 --- a/drivers/firmware/efi/riscv-runtime.c +++ b/drivers/firmware/efi/riscv-runtime.c @@ -85,7 +85,7 @@ static int __init riscv_enable_runtime_services(void) efi_memory_desc_t *md; =20 for_each_efi_memory_desc(md) { - int md_size =3D md->num_pages << EFI_PAGE_SHIFT; + u64 md_size =3D md->num_pages << EFI_PAGE_SHIFT; struct resource *res; =20 if (!(md->attribute & EFI_MEMORY_SP)) --=20 2.34.1 From nobody Sun Feb 8 01:51:41 2026 Received: from mail-pf1-f170.google.com (mail-pf1-f170.google.com [209.85.210.170]) (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 21BF414D445 for ; Fri, 2 Feb 2024 18:07:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706897237; cv=none; b=PrBHarzPI4kBJKVXWuuG308bmflwzIwI1kaSjngmm+Z45ZZtr3vVnC6ijH7p22nzVQNcJhC8NekWV4JP9UAU2O9XjbATf3zrkD6R+5i6jseqNBTPJQULEnuZERbdIdbOaChyi8dufq+jXEOhBfxMHASIH4m8A7WOyghDEFKjTfo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706897237; c=relaxed/simple; bh=rOW+QJMgxaki+Zs/59rTQG+pV3s0svR8zftHybnFrCo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WxI7WMc8ur4HC0RfkI2SN+Xxt78smdTUJbC3hwWp3R5BBoCiP3eBpHe6Eer+3iZENae2UxCfL4jyZDgGK+U/xHDsPv1QqqPfFQiixjwSYa/2VDef0OsdNWAz07n+y7v/GaIAsexoO64MPrUITvihuYa3bY9q6tXUi+Lx40TBMsU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com; spf=pass smtp.mailfrom=rivosinc.com; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b=eIxez5hU; arc=none smtp.client-ip=209.85.210.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b="eIxez5hU" Received: by mail-pf1-f170.google.com with SMTP id d2e1a72fcca58-6ddd1fc67d2so1812837b3a.2 for ; Fri, 02 Feb 2024 10:07:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1706897235; x=1707502035; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hDme6jlnfxJTWCG7qW4Qy8DGvSmakPXAl9L2egvk9Cw=; b=eIxez5hUfp9YtpCJbFFsq5rHhz4ETMEgVxD3PyaqapRe+MNvn+FW4F/1PQ3S83IN6Q Z6X1KG1LbIVKZ5STLjcROvU40m66iRYZ/9gWL9KI4ECoFyL0zwWc9vHMPxVs9q6sEvLw GS/4JaTNu6j6ve5C8MAC5g2cOXUFky2G1F077K1c6RSEaovfRfeW7ruSbqsWaoMiZHhO EOHZkoRujQYwUy5aPGvmkT1ux7uVvX1qh0l6n9FjCzakC3z4nXLkew4PqYedL2+aeG4X X5r2+awR/z7ZgZoqEz95l/mmLIlRXk+dmWzsK+1/G/U+LbE1acs9GNdTjcYcI6SdlAlX DsjQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706897235; x=1707502035; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hDme6jlnfxJTWCG7qW4Qy8DGvSmakPXAl9L2egvk9Cw=; b=E872wFsxSOrbiSo2Gl2FyVeDLohy1eOdUdoSBXZYqjKRC064knuAWQXSRzh+LGWHwi DBSV1Z2UdmyKQD9x0HebvX+tdgObHGbnx8NgStWEJlXhWi6Bn1unE25lh/DnRJSvsVqJ T/JiUXxov1PGhuxRA9PcsgVHgW2aRoVAoG7LROFQczzDnquttaT2im8ubLWmsJfRfQOn I+79mZtuYUvrrhTF11w2KktMmV0F6VJ+RofspIudWLsr0q2sEmBmj7qM5SdTxqxAwhAS J2mri7nLk8DwGcVojeSVzrHeYH+7P9kyGmjd9h9zcFyjwHDCp0CAR6QQWoCUVuGA6/o8 KfEw== X-Gm-Message-State: AOJu0YzKShpRRtbTtjkvNlwnzs/WEeum5me1V6ZQRR2teKQJpz0DTmvd StEZ2fdsahc2HK1if7TnkuG0F+APivdwf/IwPjLyiD23ty1h9JL+9vWFEIQF8Gs= X-Google-Smtp-Source: AGHT+IGApjy1ny5FjS4Gq04ep4ZGH47dxEianIZwB0z+YLgCGzepTGWlWVGFhBvj0Leq9dER0TovMw== X-Received: by 2002:a05:6a00:2d0b:b0:6de:2f30:9aa5 with SMTP id fa11-20020a056a002d0b00b006de2f309aa5mr10452219pfb.23.1706897235504; Fri, 02 Feb 2024 10:07:15 -0800 (PST) X-Forwarded-Encrypted: i=0; AJvYcCUwNs/zU8/SXHjEg5qUkWY+fJgs2JKC5h3bIMxiFY66H4USskIUSM3fOxkdHpyh6sQ4e2yYOdz45C57EARz86REEZiCOCXWbA5Gm0Sypq6v9RBEWN+/mx4GuYvD6I1trxf3wKO1ukvU3hoffX9eTbINn/OcE3cSok4CavXG2l66S+no2C6S9fhUfvsxLFKbFDXcy3TWbq5Aq6sHseHObZF/cMmyc0nLCh8CIDSfRN4magWGtl7jSipLlkKKq5yv2ltHVt83sqeCYfeM Received: from abrestic.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id s26-20020aa78d5a000000b006ddd31a701esm1989267pfe.19.2024.02.02.10.07.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Feb 2024 10:07:15 -0800 (PST) From: Andrew Bresticker To: Ard Biesheuvel Cc: Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Andrew Bresticker Subject: [PATCH v2 2/2] efi: Don't add memblocks for soft-reserved memory Date: Fri, 2 Feb 2024 10:07:04 -0800 Message-Id: <20240202180704.808766-3-abrestic@rivosinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240202180704.808766-1-abrestic@rivosinc.com> References: <20240202180704.808766-1-abrestic@rivosinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Adding memblocks for soft-reserved regions prevents them from later being hotplugged in by dax_kmem. Signed-off-by: Andrew Bresticker Acked-by: Palmer Dabbelt --- v2: only skip adding memblocks for soft-reserved mem --- drivers/firmware/efi/efi-init.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/firmware/efi/efi-init.c b/drivers/firmware/efi/efi-ini= t.c index d4987d013080..a00e07b853f2 100644 --- a/drivers/firmware/efi/efi-init.c +++ b/drivers/firmware/efi/efi-init.c @@ -143,15 +143,6 @@ static __init int is_usable_memory(efi_memory_desc_t *= md) case EFI_BOOT_SERVICES_DATA: case EFI_CONVENTIONAL_MEMORY: case EFI_PERSISTENT_MEMORY: - /* - * Special purpose memory is 'soft reserved', which means it - * is set aside initially, but can be hotplugged back in or - * be assigned to the dax driver after boot. - */ - if (efi_soft_reserve_enabled() && - (md->attribute & EFI_MEMORY_SP)) - return false; - /* * According to the spec, these regions are no longer reserved * after calling ExitBootServices(). However, we can only use @@ -196,6 +187,16 @@ static __init void reserve_regions(void) size =3D npages << PAGE_SHIFT; =20 if (is_memory(md)) { + /* + * Special purpose memory is 'soft reserved', which + * means it is set aside initially. Don't add a memblock + * for it now so that it can be hotplugged back in or + * be assigned to the dax driver after boot. + */ + if (efi_soft_reserve_enabled() && + (md->attribute & EFI_MEMORY_SP)) + continue; + early_init_dt_add_memory_arch(paddr, size); =20 if (!is_usable_memory(md)) --=20 2.34.1