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Kernel: Add helpers for rdrand and rdseed

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This commit is contained in:
Idan Horowitz 2022-03-21 22:59:07 +02:00 • committed by Andreas Kling
parent 8ab25f8d8c
commit a9764dabee
1 changed files with 22 additions and 0 deletions
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22
Kernel/Arch/x86/ASM_wrapper.h
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@ -160,6 +160,28 @@ ALWAYS_INLINE u64 read_tsc()
return ((u64)msw << 32) | lsw;
}
ALWAYS_INLINE u32 rdrand()
{
u32 value;
asm volatile(
"1:\n"
"rdrand %0\n"
"jnc 1b\n"
: "=r"(value)::"cc");
return value;
}
ALWAYS_INLINE u32 rdseed()
{
u32 value;
asm volatile(
"1:\n"
"rdseed %0\n"
"jnc 1b\n"
: "=r"(value)::"cc");
return value;
}
void stac();
void clac();