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Fri, 7 May 2021 19:02:16 +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 22/25] x86/MCE/AMD: Define function to find shift and mask values Date: Fri, 7 May 2021 15:01:37 -0400 Message-Id: <20210507190140.18854-23-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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These will be expanded for future DF versions. Also, move reading of the System Fabric ID Mask register into a helper function and call this early. This will be expanded for future DF versions and will be used to determine DF version levels. Signed-off-by: Yazen Ghannam --- arch/x86/kernel/cpu/mce/amd.c | 56 +++++++++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 13 deletions(-) diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index 6980c5c62f49..01931f98c6d9 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -725,6 +725,7 @@ struct addr_ctx { u32 reg_dram_offset; u32 reg_base_addr; u32 reg_limit_addr; + u32 reg_fab_id_mask0; u16 nid; u8 umc; u8 map_num; @@ -734,6 +735,8 @@ struct addr_ctx { u8 intlv_num_sockets; u8 cs_id; u8 cs_fabric_id; + u8 die_id_mask; + u8 socket_id_mask; bool hash_enabled; }; @@ -905,15 +908,31 @@ static int get_cs_fabric_id(struct addr_ctx *ctx) return 0; } +static void get_masks(struct addr_ctx *ctx) +{ + ctx->die_id_mask = (ctx->reg_fab_id_mask0 >> 8) & 0xFF; + ctx->socket_id_mask = (ctx->reg_fab_id_mask0 >> 16) & 0xFF; +} + +static u8 get_die_id_shift(struct addr_ctx *ctx) +{ + return (ctx->reg_fab_id_mask0 >> 24) & 0xF; +} + +static u8 get_socket_id_shift(struct addr_ctx *ctx) +{ + return (ctx->reg_fab_id_mask0 >> 28) & 0xF; +} + static int calculate_cs_id(struct addr_ctx *ctx) { - u8 die_id_shift, die_id_mask, socket_id_shift, socket_id_mask; u8 die_id_bit, sock_id_bit, cs_mask = 0; - u32 tmp; if (get_cs_fabric_id(ctx)) return -EINVAL; + get_masks(ctx); + die_id_bit = 0; /* If interleaved over more than 1 channel: */ @@ -923,27 +942,26 @@ static int calculate_cs_id(struct addr_ctx *ctx) ctx->cs_id = ctx->cs_fabric_id & cs_mask; } - sock_id_bit = die_id_bit; + /* Return early if no die interleaving and no socket interleaving. */ + if (!(ctx->intlv_num_dies || ctx->intlv_num_sockets)) + return 0; - if (ctx->intlv_num_dies || ctx->intlv_num_sockets) - if (amd_df_indirect_read(ctx->nid, df_regs[SYS_FAB_ID_MASK], ctx->umc, &tmp)) - return -EINVAL; + sock_id_bit = die_id_bit; /* If interleaved over more than 1 die: */ if (ctx->intlv_num_dies) { - sock_id_bit = die_id_bit + ctx->intlv_num_dies; - die_id_shift = (tmp >> 24) & 0xF; - die_id_mask = (tmp >> 8) & 0xFF; + u8 die_id_shift = get_die_id_shift(ctx); - ctx->cs_id |= ((ctx->cs_fabric_id & die_id_mask) >> die_id_shift) << die_id_bit; + sock_id_bit = die_id_bit + ctx->intlv_num_dies; + ctx->cs_id |= ((ctx->cs_fabric_id & ctx->die_id_mask) + >> die_id_shift) << die_id_bit; } /* If interleaved over more than 1 socket: */ if (ctx->intlv_num_sockets) { - socket_id_shift = (tmp >> 28) & 0xF; - socket_id_mask = (tmp >> 16) & 0xFF; + u8 socket_id_shift = get_socket_id_shift(ctx); - ctx->cs_id |= ((ctx->cs_fabric_id & socket_id_mask) + ctx->cs_id |= ((ctx->cs_fabric_id & ctx->socket_id_mask) >> socket_id_shift) << sock_id_bit; } @@ -1037,6 +1055,15 @@ static int addr_over_limit(struct addr_ctx *ctx) return 0; } +static int get_fabric_id_mask_reg(struct addr_ctx *ctx) +{ + if (amd_df_indirect_read(ctx->nid, df_regs[SYS_FAB_ID_MASK], + ctx->umc, &ctx->reg_fab_id_mask0)) + return -EINVAL; + + return 0; +} + int umc_normaddr_to_sysaddr(u64 *addr, u16 nid, u8 umc) { struct addr_ctx ctx; @@ -1049,6 +1076,9 @@ int umc_normaddr_to_sysaddr(u64 *addr, u16 nid, u8 umc) ctx.nid = nid; ctx.umc = umc; + if (get_fabric_id_mask_reg(&ctx)) + return -EINVAL; + ctx.df_type = get_df_type(&ctx); if (remove_dram_offset(&ctx)) -- 2.25.1