6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: John Allen john.allen@amd.com
[ Upstream commit d5811a165caf63a69cd8ae11156b8587cc57d1d1 ]
Validate address maps at the time the information is gathered as the address map will not change during translation.
Signed-off-by: John Allen john.allen@amd.com Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Reviewed-by: Yazen Ghannam yazen.ghannam@amd.com Link: https://lore.kernel.org/r/20240606203313.51197-5-john.allen@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/ras/amd/atl/dehash.c | 43 -------------------- drivers/ras/amd/atl/map.c | 77 ++++++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+), 43 deletions(-)
diff --git a/drivers/ras/amd/atl/dehash.c b/drivers/ras/amd/atl/dehash.c index 4ea46262c4f5..d4ee7ecabaee 100644 --- a/drivers/ras/amd/atl/dehash.c +++ b/drivers/ras/amd/atl/dehash.c @@ -12,41 +12,10 @@
#include "internal.h"
-/* - * Verify the interleave bits are correct in the different interleaving - * settings. - * - * If @num_intlv_dies and/or @num_intlv_sockets are 1, it means the - * respective interleaving is disabled. - */ -static inline bool map_bits_valid(struct addr_ctx *ctx, u8 bit1, u8 bit2, - u8 num_intlv_dies, u8 num_intlv_sockets) -{ - if (!(ctx->map.intlv_bit_pos == bit1 || ctx->map.intlv_bit_pos == bit2)) { - pr_debug("Invalid interleave bit: %u", ctx->map.intlv_bit_pos); - return false; - } - - if (ctx->map.num_intlv_dies > num_intlv_dies) { - pr_debug("Invalid number of interleave dies: %u", ctx->map.num_intlv_dies); - return false; - } - - if (ctx->map.num_intlv_sockets > num_intlv_sockets) { - pr_debug("Invalid number of interleave sockets: %u", ctx->map.num_intlv_sockets); - return false; - } - - return true; -} - static int df2_dehash_addr(struct addr_ctx *ctx) { u8 hashed_bit, intlv_bit, intlv_bit_pos;
- if (!map_bits_valid(ctx, 8, 9, 1, 1)) - return -EINVAL; - intlv_bit_pos = ctx->map.intlv_bit_pos; intlv_bit = !!(BIT_ULL(intlv_bit_pos) & ctx->ret_addr);
@@ -67,9 +36,6 @@ static int df3_dehash_addr(struct addr_ctx *ctx) bool hash_ctl_64k, hash_ctl_2M, hash_ctl_1G; u8 hashed_bit, intlv_bit, intlv_bit_pos;
- if (!map_bits_valid(ctx, 8, 9, 1, 1)) - return -EINVAL; - hash_ctl_64k = FIELD_GET(DF3_HASH_CTL_64K, ctx->map.ctl); hash_ctl_2M = FIELD_GET(DF3_HASH_CTL_2M, ctx->map.ctl); hash_ctl_1G = FIELD_GET(DF3_HASH_CTL_1G, ctx->map.ctl); @@ -171,9 +137,6 @@ static int df4_dehash_addr(struct addr_ctx *ctx) bool hash_ctl_64k, hash_ctl_2M, hash_ctl_1G; u8 hashed_bit, intlv_bit;
- if (!map_bits_valid(ctx, 8, 8, 1, 2)) - return -EINVAL; - hash_ctl_64k = FIELD_GET(DF4_HASH_CTL_64K, ctx->map.ctl); hash_ctl_2M = FIELD_GET(DF4_HASH_CTL_2M, ctx->map.ctl); hash_ctl_1G = FIELD_GET(DF4_HASH_CTL_1G, ctx->map.ctl); @@ -247,9 +210,6 @@ static int df4p5_dehash_addr(struct addr_ctx *ctx) u8 hashed_bit, intlv_bit; u64 rehash_vector;
- if (!map_bits_valid(ctx, 8, 8, 1, 2)) - return -EINVAL; - hash_ctl_64k = FIELD_GET(DF4_HASH_CTL_64K, ctx->map.ctl); hash_ctl_2M = FIELD_GET(DF4_HASH_CTL_2M, ctx->map.ctl); hash_ctl_1G = FIELD_GET(DF4_HASH_CTL_1G, ctx->map.ctl); @@ -360,9 +320,6 @@ static int mi300_dehash_addr(struct addr_ctx *ctx) bool hashed_bit, intlv_bit, test_bit; u8 num_intlv_bits, base_bit, i;
- if (!map_bits_valid(ctx, 8, 8, 4, 1)) - return -EINVAL; - hash_ctl_4k = FIELD_GET(DF4p5_HASH_CTL_4K, ctx->map.ctl); hash_ctl_64k = FIELD_GET(DF4_HASH_CTL_64K, ctx->map.ctl); hash_ctl_2M = FIELD_GET(DF4_HASH_CTL_2M, ctx->map.ctl); diff --git a/drivers/ras/amd/atl/map.c b/drivers/ras/amd/atl/map.c index 8b908e8d7495..04419923f088 100644 --- a/drivers/ras/amd/atl/map.c +++ b/drivers/ras/amd/atl/map.c @@ -642,6 +642,79 @@ static int get_global_map_data(struct addr_ctx *ctx) return 0; }
+/* + * Verify the interleave bits are correct in the different interleaving + * settings. + * + * If @num_intlv_dies and/or @num_intlv_sockets are 1, it means the + * respective interleaving is disabled. + */ +static inline bool map_bits_valid(struct addr_ctx *ctx, u8 bit1, u8 bit2, + u8 num_intlv_dies, u8 num_intlv_sockets) +{ + if (!(ctx->map.intlv_bit_pos == bit1 || ctx->map.intlv_bit_pos == bit2)) { + pr_debug("Invalid interleave bit: %u", ctx->map.intlv_bit_pos); + return false; + } + + if (ctx->map.num_intlv_dies > num_intlv_dies) { + pr_debug("Invalid number of interleave dies: %u", ctx->map.num_intlv_dies); + return false; + } + + if (ctx->map.num_intlv_sockets > num_intlv_sockets) { + pr_debug("Invalid number of interleave sockets: %u", ctx->map.num_intlv_sockets); + return false; + } + + return true; +} + +static int validate_address_map(struct addr_ctx *ctx) +{ + switch (ctx->map.intlv_mode) { + case DF2_2CHAN_HASH: + case DF3_COD4_2CHAN_HASH: + case DF3_COD2_4CHAN_HASH: + case DF3_COD1_8CHAN_HASH: + if (!map_bits_valid(ctx, 8, 9, 1, 1)) + goto err; + break; + + case DF4_NPS4_2CHAN_HASH: + case DF4_NPS2_4CHAN_HASH: + case DF4_NPS1_8CHAN_HASH: + case DF4p5_NPS4_2CHAN_1K_HASH: + case DF4p5_NPS4_2CHAN_2K_HASH: + case DF4p5_NPS2_4CHAN_1K_HASH: + case DF4p5_NPS2_4CHAN_2K_HASH: + case DF4p5_NPS1_8CHAN_1K_HASH: + case DF4p5_NPS1_8CHAN_2K_HASH: + case DF4p5_NPS1_16CHAN_1K_HASH: + case DF4p5_NPS1_16CHAN_2K_HASH: + if (!map_bits_valid(ctx, 8, 8, 1, 2)) + goto err; + break; + + case MI3_HASH_8CHAN: + case MI3_HASH_16CHAN: + case MI3_HASH_32CHAN: + if (!map_bits_valid(ctx, 8, 8, 4, 1)) + goto err; + break; + + /* Nothing to do for modes that don't need special validation checks. */ + default: + break; + } + + return 0; + +err: + atl_debug(ctx, "Inconsistent address map"); + return -EINVAL; +} + static void dump_address_map(struct dram_addr_map *map) { u8 i; @@ -678,5 +751,9 @@ int get_address_map(struct addr_ctx *ctx)
dump_address_map(&ctx->map);
+ ret = validate_address_map(ctx); + if (ret) + return ret; + return ret; }