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Fri, 7 May 2021 19:01:57 +0000 From: Yazen Ghannam To: linux-edac@vger.kernel.org Cc: Yazen Ghannam , linux-kernel@vger.kernel.org, tony.luck@intel.com, x86@kernel.org, Smita.KoralahalliChannabasappa@amd.com Subject: [PATCH 05/25] x86/MCE/AMD: Define function to find interleaving mode Date: Fri, 7 May 2021 15:01:20 -0400 Message-Id: <20210507190140.18854-6-Yazen.Ghannam@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210507190140.18854-1-Yazen.Ghannam@amd.com> References: <20210507190140.18854-1-Yazen.Ghannam@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [165.204.25.250] X-ClientProxiedBy: BN6PR21CA0010.namprd21.prod.outlook.com (2603:10b6:404:8e::20) To BN8PR12MB3108.namprd12.prod.outlook.com (2603:10b6:408:40::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from aus-x-yghannam.amd.com (165.204.25.250) by BN6PR21CA0010.namprd21.prod.outlook.com (2603:10b6:404:8e::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4129.3 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?UxYkoDvDTTyqPBYautrbA6z9Gy6kPQDs3sltm9icspW5ZiNg59iN70kWYhG3?= =?us-ascii?Q?PDNChmlA8xC0STL6TYxGmHiTSQRYciG+dq2xQ3+J4/s2OeBGzmXDq5LP3glZ?= =?us-ascii?Q?DOQqXG/WkMY9f3OfruhB+c3EeqMJFBpet0BSUFWT1FZpSfeXqJKMme+hXOHp?= =?us-ascii?Q?a0bp2q+HwZCFfUCOwLy/u2pegv0lSC+jt0tBdbHxVsbKvCgFbEk/UuRqgMCQ?= =?us-ascii?Q?HzNiTMtdpzl1crdD7JJLxb5HizJcWwR1Wdqv9QFwJqjKRVGnRyiG/qEsLllT?= =?us-ascii?Q?pNeIX0FPseeWA7lcO3Sijl6N+OzWsr1Nwijp4s0gIUbLSoHxZatsic1qXV2E?= =?us-ascii?Q?H3gwH4EIKLgJeBbNDnGC1mIh/aPTKzoiCh3vIYSaLYnFF5Qpw6Qsvx3oQ7tW?= =?us-ascii?Q?jbaz2AYrN6H3FWCxQZETgnxoF9qKHn3qwAHdLBANf1YbKjY2OxI8uV3mZ+Ze?= =?us-ascii?Q?8bpMx0t0iTqmDqwnx/+Yc8JZ8rwSn+PoKanwmrxIfqJYkufUMuCzk/oQr4bp?= =?us-ascii?Q?b+wM6cp2sJ7JE9edF6xc93wUl1CEUT3QQ0B4EmfHtPQxYTEgBp9pb1fmfPPO?= =?us-ascii?Q?fvS9YW9SnwbcbciJrds6iYXOBkVhytnszRZkwHydmISnO0loTjm/XsmGWsgE?= =?us-ascii?Q?nVDGqHG9FaMz3hHcpfwGPA/YjAwKydZ+1VIqKn4boyTIlkEBzJO4fFWbY5hy?= =?us-ascii?Q?ldKlp3RQOB+ZcrRrIykOipwueCLfqP3/8hjr1M2brIWEDEdP92YJavLKlwRR?= =?us-ascii?Q?95jFFkeR2mYJtd9PLwBATFdRjAMuWpvpTm1cLnLGTv691su9mf6jWYggBcs+?= =?us-ascii?Q?3OtamXZSk8z1CgbyEtOUUaE04sNQamcaEhPgLrD8V0ddqITbFphWQXFgZ+fx?= =?us-ascii?Q?b36MXRc6GaooK76TwCM8SD6nhie87JaoqiSuydZFd0kri9vcYvZz1PeI/Vwp?= =?us-ascii?Q?z8TTsY9chwtpz+ZDRGMnM5ucDiEtPM+K8M5nJScjMYASdnHZxRbDi4jOyQWF?= =?us-ascii?Q?ePmDUULYqKs6kgUDHenHsGdtAT8w2wV9UqKFcbnD7NP2U069rKTv/1aFteoj?= =?us-ascii?Q?NSaBFF3Ege0Y9iEn9CqqbGvvkqXnyqWKVJQ0+deI8enCenluU8XVT8bzU86u?= =?us-ascii?Q?r7n3C/sj+wTAvCJ3imSc6yqwsVCSt5bijAYt2Acaf8KXTwCYsCR337vG5ZhW?= =?us-ascii?Q?2nfukGpODcf47vx1P1ZWW+T9DFqeeWVqLHnRwKXVHXQkQ51BTckxFpUHoNlH?= =?us-ascii?Q?YKdPrYpHD6Z/jzNBdVjnAvF4QpI5VpnVKkrhfv5m3tqItETu/ZK2RRQfvUwr?= =?us-ascii?Q?B/Cx9Xz++cIDGLhk88g9fqNV?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 54ac9515-cc80-4f8a-9ece-08d9118a9666 X-MS-Exchange-CrossTenant-AuthSource: BN8PR12MB3108.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 May 2021 19:01:57.7891 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 8FvfNSmR7a4PpsoAXXJyedz2V47L4botTALWFaN/Y+z00pfCq2qvqXYFgs5mA/OyvJIsJKQHGjhfx+waidR/IQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR12MB3073 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org From: Yazen Ghannam Define a helper function to find the interleaving mode. Define a DF2-specific function now. Future DF versions will have their own functions. Use an enumeration for the interleaving modes to give a human-readable value. Save the interleaving mode in the context struct, since this will be used in multiple functions. Multiple interleaving modes support hashing, so save a boolean in the context struct to check if hashing is enabled. Signed-off-by: Yazen Ghannam --- arch/x86/kernel/cpu/mce/amd.c | 38 ++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index 0957f11a4c84..f1a467cb74e6 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -710,9 +710,17 @@ enum df_types { DF2, }; +/* These are mapped 1:1 to the hardware values. Special cases are set at > 0x20. */ +enum intlv_modes { + NONE = 0x00, + NOHASH_2CH = 0x01, + DF2_HASH_2CH = 0x21, +}; + /* Use "reg_" prefix for raw register values. */ struct addr_ctx { enum df_types df_type; + enum intlv_modes intlv_mode; u64 ret_addr; u32 reg_dram_offset; u32 reg_base_addr; @@ -720,6 +728,7 @@ struct addr_ctx { u16 nid; u8 umc; u8 map_num; + bool hash_enabled; }; static enum df_types get_df_type(struct addr_ctx *ctx) @@ -727,6 +736,28 @@ static enum df_types get_df_type(struct addr_ctx *ctx) return DF2; } +static int get_intlv_mode_df2(struct addr_ctx *ctx) +{ + ctx->intlv_mode = (ctx->reg_base_addr >> 4) & 0xF; + + if (ctx->intlv_mode == 8) { + ctx->intlv_mode = DF2_HASH_2CH; + ctx->hash_enabled = true; + } + + if (ctx->intlv_mode != NONE && + ctx->intlv_mode != NOHASH_2CH && + ctx->intlv_mode != DF2_HASH_2CH) + return -EINVAL; + + return 0; +} + +static int get_intlv_mode(struct addr_ctx *ctx) +{ + return get_intlv_mode_df2(ctx); +} + static int get_dram_offset_reg(struct addr_ctx *ctx) { if (amd_df_indirect_read(ctx->nid, df_regs[DRAM_OFFSET], ctx->umc, &ctx->reg_dram_offset)) @@ -792,7 +823,6 @@ int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) u8 num_intlv_bits, hashed_bit; u8 lgcy_mmio_hole_en; u8 cs_mask, cs_id = 0; - bool hash_enabled = false; struct addr_ctx ctx; @@ -812,6 +842,9 @@ int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) if (get_dram_addr_map(&ctx)) goto out_err; + if (get_intlv_mode(&ctx)) + goto out_err; + lgcy_mmio_hole_en = ctx.reg_base_addr & BIT(1); intlv_num_chan = (ctx.reg_base_addr >> 4) & 0xF; intlv_addr_sel = (ctx.reg_base_addr >> 8) & 0x7; @@ -839,7 +872,6 @@ int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) case 7: intlv_num_chan = 4; break; case 8: intlv_num_chan = 1; - hash_enabled = true; break; default: pr_err("%s: Invalid number of interleaved channels %d.\n", @@ -940,7 +972,7 @@ int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) ctx.ret_addr += (BIT_ULL(32) - dram_hole_base); } - if (hash_enabled) { + if (ctx.hash_enabled) { /* Save some parentheses and grab ls-bit at the end. */ hashed_bit = (ctx.ret_addr >> 12) ^ (ctx.ret_addr >> 18) ^ -- 2.25.1