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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by CH1PEPF0000A348.mail.protection.outlook.com (10.167.244.4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9846.18 via Frontend Transport; Thu, 23 Apr 2026 12:57:24 +0000 Received: from satlexmb07.amd.com (10.181.42.216) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Thu, 23 Apr 2026 07:57:24 -0500 Received: from [10.85.40.149] (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.17 via Frontend Transport; Thu, 23 Apr 2026 07:57:22 -0500 Message-ID: <8254e1b7-936c-4c36-9ead-9856f5f59d03@amd.com> Date: Thu, 23 Apr 2026 18:27:21 +0530 Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] iommu/amd: Use MAX buffer size when SNP is enabled on Family 0x19 To: Vasant Hegde , , CC: , , , , Joerg Roedel References: <20260420084204.12263-1-vasant.hegde@amd.com> Content-Language: en-US From: "Srivastava, Dheeraj Kumar" In-Reply-To: <20260420084204.12263-1-vasant.hegde@amd.com> Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: viVYsozMMZb+n2xooTemBdeWGxAbNjITjArnMnDq3vjt7nWZfN2LV/tHjbSWAD2JlRNw6ruaPxbt/qIMRKRrVHFJhnr1cA1/bFkhzr7f4oSo0j7PxxEpR4T8cK7IkiEMunypH//3IEx/PqSafazUiuY3WJ4orFmxQLQtNnCsIiD+WX9vwIrEJE6/KsLyd3BSbEWqtoepZ82277zATZN3b8UfB+RjOT76yH9yWXSNsoPTsxkU204muLwEH0fwJOsMY+fbKa+KM7USVVVWplwlzZ6/54qvaXnm580c0hROnL0XWmPddp6ybcvf1LG9lfaSfB8bmpkLIgt7HtgDtZJPRFtJc8jIJy5JGhrh0DAWnPoazIqT73XoKVRO6Bm78nmpKcbVtemXSO/KaZp0YpIKOz1M8/FzNM7+2zOa3ydascD+u4oMVHkhI1Dm+XsgKK7G X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Apr 2026 12:57:24.8327 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 461f310b-ebfa-4be2-22fb-08dea137ddc1 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000A348.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6260 On 4/20/2026 2:12 PM, Vasant Hegde wrote: > This series addresses CVE-2023-20585 [1] by increasing the AMD IOMMU > Event log and PPR log buffer sizes to the maximum supported value (512K) > on affected CPU families when SNP is enabled. > > Use MAX buffer size when SNP is enabled on Milan/Genoa. Impacted buffers: > - Milan : Event log (PPR/GALog is not supported when SNP is enabled) > - Genoa : Event and PPR log (GALog is not supported when SNP is enabled) > > [1] https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3016.html > > Cc: Borislav Petkov > Cc: Suravee Suthikulpanit > Cc: Joerg Roedel > > Vasant Hegde (2): > iommu/amd: Use maximum Event log buffer size when SNP is enabled on Family 0x19 > iommu/amd: Use maximum PPR log buffer size when SNP is enabled on Family 0x19 > > drivers/iommu/amd/amd_iommu.h | 3 + > drivers/iommu/amd/amd_iommu_types.h | 21 +++-- > drivers/iommu/amd/init.c | 123 ++++++++++++++++++++-------- > drivers/iommu/amd/iommu.c | 2 +- > drivers/iommu/amd/ppr.c | 8 +- > 5 files changed, 110 insertions(+), 47 deletions(-) > Tested-by: Dheeraj Kumar Srivastava Thanks Dheeraj