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Mikhail Paulyshka 5b937a1ed6 x86/rdrand: Disable RDSEED on AMD Cyan Skillfish 
AMD Cyan Skillfish (Family 17h, Model 47h, Stepping 0h) has an error that
causes RDSEED to always return 0xffffffff, while RDRAND works correctly.

Mask the RDSEED cap for this CPU so that both /proc/cpuinfo and direct CPUID
read report RDSEED as unavailable.

  [ bp: Move to amd.c, massage. ]

Signed-off-by: Mikhail Paulyshka <me@mixaill.net>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/20250524145319.209075-1-me@mixaill.net
2025-07-08 21:33:26 +02:00
..
amd tools arch amd ibs: Sync ibs.h with the kernel sources 2025-06-17 16:53:22 -03:00
asm.h x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers 2025-03-19 11:47:30 +01:00
atomic.h
barrier.h
cmpxchg.h
cpufeatures.h tools headers x86 cpufeatures: Sync with the kernel sources 2025-06-17 18:29:42 -03:00
emulate_prefix.h
inat.h x86/insn: Stop decoding i64 instructions in x86-64 mode at opcode 2025-05-06 12:03:16 +02:00
inat_types.h
insn.h x86/insn: Add support for APX EVEX to the instruction decoder logic 2024-05-02 13:13:45 +02:00
msr-index.h x86/rdrand: Disable RDSEED on AMD Cyan Skillfish 2025-07-08 21:33:26 +02:00
nops.h x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers 2025-03-19 11:47:30 +01:00
orc_types.h x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers 2025-03-19 11:47:30 +01:00
pvclock-abi.h x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers 2025-03-19 11:47:30 +01:00
pvclock.h
rmwcc.h work around gcc bugs with 'asm goto' with outputs 2024-02-09 15:57:48 -08:00