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helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C From: Michal Orzel To: CC: Michal Orzel , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk Subject: [PATCH v2 1/3] xen/arm64: Fix incorrect DIRECTMAP_SIZE calculation Date: Tue, 17 Jan 2023 12:43:30 +0100 Message-ID: <20230117114332.25863-2-michal.orzel@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230117114332.25863-1-michal.orzel@amd.com> References: <20230117114332.25863-1-michal.orzel@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0000E62F:EE_|BL1PR12MB5192:EE_ X-MS-Office365-Filtering-Correlation-Id: 5244ce5b-9571-4ca8-8ef8-08daf8801279 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2023 11:43:37.5023 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5244ce5b-9571-4ca8-8ef8-08daf8801279 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0000E62F.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5192 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1673955854076100002 Content-Type: text/plain; charset="utf-8" The direct mapped area occupies L0 slots from 256 to 265 included (i.e. 10 slots), resulting in 5TB (512GB * 10) of virtual address space. However, due to incorrect slot subtraction (we take 9 slots into account) we set DIRECTMAP_SIZE to 4.5TB instead. Fix it. Note that we only support up to 2TB of physical memory so this is a latent issue. Fixes: 5263507b1b4a ("xen: arm: Use a direct mapping of RAM on arm64") Signed-off-by: Michal Orzel Reviewed-by: Julien Grall --- Changes in v2: - update commit msg making it clear that this is a latent issue=20 --- xen/arch/arm/include/asm/config.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/arm/include/asm/config.h b/xen/arch/arm/include/asm/c= onfig.h index 0fefed1b8aa9..16213c8b677f 100644 --- a/xen/arch/arm/include/asm/config.h +++ b/xen/arch/arm/include/asm/config.h @@ -157,7 +157,7 @@ #define FRAMETABLE_NR (FRAMETABLE_SIZE / sizeof(*frame_table)) =20 #define DIRECTMAP_VIRT_START SLOT0(256) -#define DIRECTMAP_SIZE (SLOT0_ENTRY_SIZE * (265-256)) +#define DIRECTMAP_SIZE (SLOT0_ENTRY_SIZE * (266 - 256)) #define DIRECTMAP_VIRT_END (DIRECTMAP_VIRT_START + DIRECTMAP_SIZE - 1) =20 #define XENHEAP_VIRT_START directmap_virt_start --=20 2.25.1 From nobody Fri May 17 04:59:57 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C From: Michal Orzel To: CC: Michal Orzel , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk Subject: [PATCH v2 2/3] xen/arm32: Remove unused macro FRAMETABLE_VIRT_END Date: Tue, 17 Jan 2023 12:43:31 +0100 Message-ID: <20230117114332.25863-3-michal.orzel@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230117114332.25863-1-michal.orzel@amd.com> References: <20230117114332.25863-1-michal.orzel@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0000E62F:EE_|BY5PR12MB4082:EE_ X-MS-Office365-Filtering-Correlation-Id: 4fd8a623-83ad-4af9-fa16-08daf8801367 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2023 11:43:39.0648 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4fd8a623-83ad-4af9-fa16-08daf8801367 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0000E62F.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4082 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1673955854098100003 Content-Type: text/plain; charset="utf-8" This macro is unused and the corresponding one for arm64 has already been removed as part of the commit 6dc9a1fe982f ("xen/arm: Remove most of the *_VIRT_END defines"). Signed-off-by: Michal Orzel Reviewed-by: Julien Grall --- Changes in v2: - move a change to a separate patch --- xen/arch/arm/include/asm/config.h | 1 - 1 file changed, 1 deletion(-) diff --git a/xen/arch/arm/include/asm/config.h b/xen/arch/arm/include/asm/c= onfig.h index 16213c8b677f..6661a41583c6 100644 --- a/xen/arch/arm/include/asm/config.h +++ b/xen/arch/arm/include/asm/config.h @@ -127,7 +127,6 @@ #define FRAMETABLE_VIRT_START _AT(vaddr_t,0x02000000) #define FRAMETABLE_SIZE MB(128-32) #define FRAMETABLE_NR (FRAMETABLE_SIZE / sizeof(*frame_table)) -#define FRAMETABLE_VIRT_END (FRAMETABLE_VIRT_START + FRAMETABLE_SIZE - = 1) =20 #define VMAP_VIRT_START _AT(vaddr_t,0x10000000) #define VMAP_VIRT_SIZE _AT(vaddr_t, GB(1) - MB(256)) --=20 2.25.1 From nobody Fri May 17 04:59:57 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2023 11:43:40.3433 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cab52fef-2382-48fd-479b-08daf8801426 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT056.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7870 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1673955854287100007 Content-Type: text/plain; charset="utf-8" The amount of supported physical memory depends on the frametable size and the number of struct page_info entries that can fit into it. Define a macro PAGE_INFO_SIZE to store the current size of the struct page_info (i.e. 56B for arm64 and 32B for arm32) and add a sanity check in setup_frametable_mappings to be notified whenever the size of the structure changes. Also call a panic if the calculated frametable_size exceeds the limit defined by FRAMETABLE_SIZE macro. Update the comments regarding the frametable in asm/config.h. Signed-off-by: Michal Orzel Reviewed-by: Julien Grall --- Changes in v2: - refactor panic message - move removal of FRAMETABLE_VIRT_END to a separate patch --- xen/arch/arm/include/asm/config.h | 4 ++-- xen/arch/arm/include/asm/mm.h | 11 +++++++++++ xen/arch/arm/mm.c | 6 ++++++ 3 files changed, 19 insertions(+), 2 deletions(-) diff --git a/xen/arch/arm/include/asm/config.h b/xen/arch/arm/include/asm/c= onfig.h index 6661a41583c6..d8f99776986f 100644 --- a/xen/arch/arm/include/asm/config.h +++ b/xen/arch/arm/include/asm/config.h @@ -82,7 +82,7 @@ * ARM32 layout: * 0 - 12M * - * 32M - 128M Frametable: 24 bytes per page for 16GB of RAM + * 32M - 128M Frametable: 32 bytes per page for 12GB of RAM * 256M - 1G VMAP: ioremap and early_ioremap use this virtual address * space * @@ -95,7 +95,7 @@ * * 1G - 2G VMAP: ioremap and early_ioremap * - * 32G - 64G Frametable: 24 bytes per page for 5.3TB of RAM + * 32G - 64G Frametable: 56 bytes per page for 2TB of RAM * * 0x0000008000000000 - 0x00007fffffffffff (127.5TB, L0 slots [1..255]) * Unused diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h index 68adcac9fa8d..23dec574eb31 100644 --- a/xen/arch/arm/include/asm/mm.h +++ b/xen/arch/arm/include/asm/mm.h @@ -26,6 +26,17 @@ */ #define PFN_ORDER(_pfn) ((_pfn)->v.free.order) =20 +/* + * The size of struct page_info impacts the number of entries that can fit + * into the frametable area and thus it affects the amount of physical mem= ory + * we claim to support. Define PAGE_INFO_SIZE to be used for sanity checki= ng. +*/ +#ifdef CONFIG_ARM_64 +#define PAGE_INFO_SIZE 56 +#else +#define PAGE_INFO_SIZE 32 +#endif + struct page_info { /* Each frame can be threaded onto a doubly-linked list. */ diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index 0fc6f2992dd1..1a94b52cce7e 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -676,6 +676,12 @@ void __init setup_frametable_mappings(paddr_t ps, padd= r_t pe) const unsigned long mapping_size =3D frametable_size < MB(32) ? MB(2) = : MB(32); int rc; =20 + BUILD_BUG_ON(sizeof(struct page_info) !=3D PAGE_INFO_SIZE); + + if ( frametable_size > FRAMETABLE_SIZE ) + panic("The frametable cannot cover the physical region %#"PRIpaddr= " - %#"PRIpaddr"\n", + ps, pe); + frametable_base_pdx =3D mfn_to_pdx(maddr_to_mfn(ps)); /* Round up to 2M or 32M boundary, as appropriate. */ frametable_size =3D ROUNDUP(frametable_size, mapping_size); --=20 2.25.1