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Mon, 22 Aug 2016 23:25:17 +0000 Subject: [RFC PATCH v1 08/28] Access BOOT related data encrypted with SEV active From: Brijesh Singh To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Date: Mon, 22 Aug 2016 19:25:14 -0400 Message-ID: <147190831414.9523.1885664762210149209.stgit@brijesh-build-machine> In-Reply-To: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> References: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: CY1PR14CA0005.namprd14.prod.outlook.com (10.163.13.143) To SN1PR12MB0669.namprd12.prod.outlook.com (10.163.208.27) X-MS-Office365-Filtering-Correlation-Id: c359a8a1-5646-4f4d-868b-08d3cae39583 X-Microsoft-Exchange-Diagnostics: 1; SN1PR12MB0669; 2:irYDPQm/TXyRQLwfUNZw+ULlm4Yc8HlTthi0MdAug8Rmj5M0ohY8PBZP7AowltcBeWkFv+pskZZPO/k7gd3XJ4n2Ly6WEa7yE67NjLz8a8wGBgFOuVk8u2zVV36OpHyulVHJhHkSfkn3bkKyk/9v3l/VDIVEiipvVLmecheAAZug0IWNIrCtbnCNLlq/gEP8; 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Update the architecture override in early_memremap to keep the encryption attribute when mapping this data. Signed-off-by: Tom Lendacky --- arch/x86/mm/ioremap.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index e3bdc5a..2ea6deb 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -429,10 +429,11 @@ pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr, pgprot_t prot) { /* - * If memory encryption is enabled and BOOT_DATA is being mapped - * then remove the encryption bit. + * If memory encryption is enabled, we are not running with + * SEV active and BOOT_DATA is being mapped then remove the + * encryption bit */ - if (_PAGE_ENC && (owner == BOOT_DATA)) + if (_PAGE_ENC && !sev_active && (owner == BOOT_DATA)) prot = __pgprot(pgprot_val(prot) & ~_PAGE_ENC); return prot;