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Mikhail Paulyshka 5603448f10 x86/rdrand: Disable RDSEED on AMD Cyan Skillfish 
commit 5b937a1ed64ebeba8876e398110a5790ad77407c upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit ee21fbcb87a0f2623e02c5af639196efd398d61e)
 		2025-07-22 16:16:43 +08:00
..
alpha/include
…
arc/include/uapi/asm
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arm/include tools headers kvm: Sync kvm headers with the kernel sources 2019-12-02 12:54:13 -03:00
arm64/include tools headers arm64: Sync arm64's cputype.h with the kernel sources 2024-12-10 20:40:30 +08:00
csky/include/uapi/asm csky: Add support for libdw 2019-05-15 16:36:46 -03:00
hexagon/include/uapi/asm tools arch: Remove uapi bitsperlong.h of hexagon and microblaze 2023-06-22 17:04:37 +02:00
ia64/include ia64: tools: remove duplicate definition of ia64_mf() on ia64 2021-04-16 16:10:37 -07:00
loongarch/include Reapply "objtool/LoongArch: Enable orc to be built" 2024-12-10 20:39:13 +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 2023-12-08 08:52:20 +01:00
powerpc/include perf powerpc: Add support to expose instruction and data address registers as part of extended regs 2021-10-25 13:47:42 -03:00
riscv/include/uapi/asm asm-generic: partially revert "Unify uapi bitsperlong.h for arm64, riscv and loongarch" 2023-08-17 14:51:20 +02:00
s390/include selftests/bpf: Remove not used headers 2023-02-22 13:01:34 -08:00
sh/include sh: remove sh5 support 2020-06-01 14:48:52 -04:00
sparc/include tools headers UAPI: Update tools's copy of mman.h headers 2019-07-29 09:02:58 -03:00
sw_64/include sw64 bpf: Add missing uapi header for BPF_PROG_TYPE_PERF_EVENT programs 2025-05-28 18:31:06 +08:00
x86 x86/rdrand: Disable RDSEED on AMD Cyan Skillfish 2025-07-22 16:16:43 +08:00
xtensa/include
…