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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
..
alpha/include
arc/include/uapi/asm
arm/include KVM: arm64: nv: Allow userland to set VGIC maintenance IRQ 2025-03-03 14:57:10 -08:00
arm64 tools kvm headers arm64: Update KVM header from the kernel sources 2025-06-16 14:05:10 -03:00
csky/include/uapi/asm
hexagon/include/uapi/asm tools arch: Remove uapi bitsperlong.h of hexagon and microblaze 2023-06-22 17:04:37 +02:00
loongarch/include LoongArch: Replace __ASSEMBLY__ with __ASSEMBLER__ in headers 2025-06-26 20:07:10 +08:00
microblaze/include/uapi/asm tools arch: Remove uapi bitsperlong.h of hexagon and microblaze 2023-06-22 17:04:37 +02:00
mips/include perf tools: Copy uapi/asm/perf_regs.h from the kernel for MIPS 2021-06-01 10:07:46 -03:00
parisc/include/uapi/asm parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes 2023-11-25 09:43:18 +01:00
powerpc/include selftests: vDSO: unconditionally build chacha test 2024-10-08 15:21:29 -06:00
riscv/include tools: Add riscv barrier implementation 2024-09-20 01:46:46 -07:00
s390/include - second part of the ucontrol selftest 2024-11-12 13:17:55 -05:00
sh/include
sparc/include
x86 x86/rdrand: Disable RDSEED on AMD Cyan Skillfish 2025-07-08 21:33:26 +02:00
xtensa/include