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RAS/AMD/ATL: Fix MI300 bank hash

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Apply the SID bits to the correct offset in the Bank value. Do this in
the temporary value so they don't need to be masked off later.

Fixes: 87a6123753 ("RAS/AMD/ATL: Add MI300 DRAM to normalized address translation support")
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/20240607-mi300-dram-xl-fix-v1-1-2f11547a178c@amd.com
This commit is contained in:
Yazen Ghannam 2024-06-07 16:32:59 -05:00 committed by Borislav Petkov (AMD)
parent 83a7eefedc
commit fe8a08973a
1 changed files with 2 additions and 7 deletions
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9
drivers/ras/amd/atl/umc.c
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@ -189,16 +189,11 @@ static unsigned long convert_dram_to_norm_addr_mi300(unsigned long addr)
/* Calculate hash for PC bit. */
if (addr_hash.pc.xor_enable) {
/* Bits SID[1:0] act as Bank[6:5] for PC hash, so apply them here. */
bank |= sid << 5;
temp = bitwise_xor_bits(col & addr_hash.pc.col_xor);
temp ^= bitwise_xor_bits(row & addr_hash.pc.row_xor);
temp ^= bitwise_xor_bits(bank & addr_hash.bank_xor);
/* Bits SID[1:0] act as Bank[5:4] for PC hash, so apply them here. */
temp ^= bitwise_xor_bits((bank | sid << NUM_BANK_BITS) & addr_hash.bank_xor);
pc ^= temp;
/* Drop SID bits for the sake of debug printing later. */
bank &= 0x1F;
}
/* Reconstruct the normalized address starting with NA[4:0] = 0 */