Andrew Cooper b0563468ee x86/CPU/AMD: Disable XSAVES on AMD family 0x17
AMD Erratum 1386 is summarised as:

  XSAVES Instruction May Fail to Save XMM Registers to the Provided
  State Save Area

This piece of accidental chronomancy causes the %xmm registers to
occasionally reset back to an older value.

Ignore the XSAVES feature on all AMD Zen1/2 hardware.  The XSAVEC
instruction (which works fine) is equivalent on affected parts.

  [ bp: Typos, move it into the F17h-specific function. ]

Reported-by: Tavis Ormandy <taviso@gmail.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/20230307174643.1240184-1-andrew.cooper3@citrix.com
2023-03-08 16:56:08 +01:00
..
2023-02-20 18:32:55 -08:00
2023-02-20 18:50:02 -08:00
2023-02-23 13:03:08 -08:00
2023-02-25 09:11:30 -08:00
2022-09-26 10:13:16 -07:00
2022-04-19 17:14:09 -07:00
2022-12-17 14:06:53 -06:00
2022-12-02 14:06:34 +01:00
2022-04-07 08:27:51 -07:00
2022-08-02 15:21:18 -07:00
2022-12-15 11:12:21 -08:00
2023-02-23 14:00:10 -08:00
2023-02-25 11:30:21 -08:00
2023-02-21 12:13:58 -08:00
2021-12-01 00:06:43 +01:00
2022-12-10 10:33:11 -06:00
2023-01-06 04:22:34 +01:00
2022-02-25 09:36:05 +01:00
2022-09-26 19:46:16 -07:00
2022-04-14 14:09:43 +02:00