Searched hist:df25edba (Results 1 – 3 of 3) sorted by relevance
/openbmc/linux/tools/arch/x86/include/asm/ |
H A D | nops.h | df25edba Mon May 15 04:28:05 CDT 2023 Peter Zijlstra <peterz@infradead.org> x86/alternatives: Add longer 64-bit NOPs
By adding support for longer NOPs there are a few more alternatives that can turn into a single instruction.
Add up to NOP11, the same limit where GNU as .nops also stops generating longer nops. This is because a number of uarchs have severe decode penalties for more than 3 prefixes.
[ bp: Sync up with the version in tools/ while at it. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20230515093020.661756940@infradead.org
|
/openbmc/linux/arch/x86/include/asm/ |
H A D | nops.h | df25edba Mon May 15 04:28:05 CDT 2023 Peter Zijlstra <peterz@infradead.org> x86/alternatives: Add longer 64-bit NOPs
By adding support for longer NOPs there are a few more alternatives that can turn into a single instruction.
Add up to NOP11, the same limit where GNU as .nops also stops generating longer nops. This is because a number of uarchs have severe decode penalties for more than 3 prefixes.
[ bp: Sync up with the version in tools/ while at it. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20230515093020.661756940@infradead.org
|
/openbmc/linux/arch/x86/kernel/ |
H A D | alternative.c | df25edba Mon May 15 04:28:05 CDT 2023 Peter Zijlstra <peterz@infradead.org> x86/alternatives: Add longer 64-bit NOPs
By adding support for longer NOPs there are a few more alternatives that can turn into a single instruction.
Add up to NOP11, the same limit where GNU as .nops also stops generating longer nops. This is because a number of uarchs have severe decode penalties for more than 3 prefixes.
[ bp: Sync up with the version in tools/ while at it. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20230515093020.661756940@infradead.org
|