kernel/tools/arch/x86/include/asm/nops.h, branch linux-rolling-stableHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-rolling-stable2025-05-29T09:12:33Zx86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers2025-05-29T09:12:33ZThomas Huththuth@redhat.com2025-03-19T10:30:57Zurn:sha1:ffcc53a52918738a65e5ba92b8f95c15c38fe19f
[ Upstream commit 24a295e4ef1ca8e97d8b7015e1887b6e83e1c8be ]
While the GCC and Clang compilers already define __ASSEMBLER__
automatically when compiling assembly code, __ASSEMBLY__ is a
macro that only gets defined by the Makefiles in the kernel.
This can be very confusing when switching between userspace
and kernelspace coding, or when dealing with UAPI headers that
rather should use __ASSEMBLER__ instead. So let's standardize on
the __ASSEMBLER__ macro that is provided by the compilers now.
This is mostly a mechanical patch (done with a simple "sed -i"
statement), with some manual tweaks in <asm/frame.h>, <asm/hw_irq.h>
and <asm/setup.h> that mentioned this macro in comments with some
missing underscores.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250314071013.1575167-38-thuth@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
x86/alternatives: Add longer 64-bit NOPs2023-05-31T08:21:21ZPeter Zijlstrapeterz@infradead.org2023-05-15T09:28:05Zurn:sha1:df25edbac31ea87b488789d44a362063542b5967
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
x86/asm: Use _ASM_BYTES() in <asm/nops.h>2021-05-10T10:33:28ZH. Peter Anvin (Intel)hpa@zytor.com2021-05-10T09:09:40Zurn:sha1:eef23e72b78b36924aea8be5ec7c54e628c442ef
Use the new generalized _ASM_BYTES() macro from <asm/asm.h> instead of
the "home grown" _ASM_MK_NOP() in <asm/nops.h>.
Add <asm/asm.h> and update <asm/nops.h> in the tools directory...
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210510090940.924953-4-hpa@zytor.com
objtool/x86: Use asm/nops.h2021-03-15T15:37:37ZPeter Zijlstrapeterz@infradead.org2021-03-12T11:32:55Zurn:sha1:301cddc21a157a3072d789a3097857202e550a24
Since the kernel will rely on a single canonical set of NOPs, make sure
objtool uses the exact same ones.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210312115749.136357911@infradead.org