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implement -mindirect-branch-cs-prefix #1665

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nickdesaulniers opened this issue Jul 15, 2022 · 8 comments
Closed

implement -mindirect-branch-cs-prefix #1665

nickdesaulniers opened this issue Jul 15, 2022 · 8 comments
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[ARCH] x86_64 This bug impacts ARCH=x86_64 [BUG] llvm A bug that should be fixed in upstream LLVM feature-request Not a bug per-se [FIXED][LINUX] 6.2 This bug was fixed in Linux 6.2 [FIXED][LLVM] 16 This bug was fixed in LLVM 16.0

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@nickdesaulniers
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via https://lore.kernel.org/lkml/YtEs9H+JEDUq6NNm@worktop.programming.kicks-ass.net/
@nickdesaulniers nickdesaulniers added feature-request Not a bug per-se [ARCH] x86_64 This bug impacts ARCH=x86_64 labels Jul 15, 2022
@nickdesaulniers
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https://reviews.llvm.org/D130754

@nickdesaulniers nickdesaulniers added [PATCH] Submitted A patch has been submitted for review [BUG] llvm A bug that should be fixed in upstream LLVM [PATCH] Accepted A submitted patch has been accepted upstream and removed [PATCH] Submitted A patch has been submitted for review labels Aug 1, 2022
@nathanchance
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We'll need to submit a patch to the kernel to move that flag out of the GCC block:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/Makefile?h=v5.19#n17

phoebewang added a commit to llvm/llvm-project that referenced this issue Aug 4, 2022
@phoebewang
[X86] Support -mindirect-branch-cs-prefix for call and jmp to ind…
6f867f9 
…irect thunk

This is to address feature request from ClangBuiltLinux/linux#1665

Reviewed By: nickdesaulniers, MaskRay

Differential Revision: https://reviews.llvm.org/D130754
@nickdesaulniers nickdesaulniers added [FIXED][LLVM] 16 This bug was fixed in LLVM 16.0 and removed [PATCH] Accepted A submitted patch has been accepted upstream labels Aug 10, 2022
@nathanchance
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https://lore.kernel.org/20220817185410.1174782-1-nathan@kernel.org/

@nathanchance nathanchance self-assigned this Aug 17, 2022
@nickdesaulniers
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https://reviews.llvm.org/D134915 is tangentially related. clang-16.

@nathanchance
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Resent: https://lore.kernel.org/20230120165826.2469302-1-nathan@kernel.org/

@nathanchance nathanchance added the [PATCH] Submitted A patch has been submitted for review label Jan 20, 2023
@dileks
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dileks commented Jan 20, 2023

Missing link in the resend?

commit eac3e5c3fb7c
"[X86] Do not emit JCC to __x86_indirect_thunk"

BTW, what commid-id is a good choice for LLVM-16?

[1] llvm/llvm-project@eac3e5c3fb7c

ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Jan 22, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
27b5de6 
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
@nathanchance
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Kernel patch accepted: https://git.kernel.org/tip/27b5de622ea3fe0ad5a31a0ebd9f7a0a276932d1

@nickdesaulniers nickdesaulniers added [PATCH] Accepted A submitted patch has been accepted upstream and removed [PATCH] Submitted A patch has been submitted for review labels Jan 23, 2023
sirlucjan pushed a commit to CachyOS/linux that referenced this issue Jan 24, 2023
@nathanchance @sirlucjan
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
1bddf15 
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
sirlucjan pushed a commit to CachyOS/linux that referenced this issue Jan 24, 2023
@nathanchance @sirlucjan
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
c77e53f 
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
solbjorn pushed a commit to solbjorn/linux that referenced this issue Jan 28, 2023
@nathanchance @solbjorn
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
f5b9bd9 
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
@nathanchance
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In mainline: https://git.kernel.org/linus/27b5de622ea3fe0ad5a31a0ebd9f7a0a276932d1

@nathanchance nathanchance added [FIXED][LINUX] 6.2 This bug was fixed in Linux 6.2 and removed [PATCH] Accepted A submitted patch has been accepted upstream labels Jan 30, 2023
@nathanchance nathanchance removed their assignment Jan 30, 2023
ptr1337 pushed a commit to CachyOS/linux that referenced this issue Feb 1, 2023
@nathanchance @ptr1337
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
086a76f 
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
damien-lemoal pushed a commit to damien-lemoal/linux that referenced this issue Feb 5, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
c0c4824 
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 6, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
576ba1e 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
a2daa36 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
94eaa8c 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
f656b19 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
527a9d4 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
f0f2cff 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
f9461c6 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
717c583 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
f77fa0e 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
935b1a0 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
aed94f5 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
55f431c 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance @gregkh
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
0f58deb 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
f2b95d5 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
fd62a92 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
dd5ec55 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
be3f813 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
23a1a2c 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 7, 2023
@nathanchance @gregkh
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
0958c47 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 9, 2023
@nathanchance @gregkh
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
19e2f49 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
ammarfaizi2 pushed a commit to ammarfaizi2/linux-block that referenced this issue Feb 9, 2023
@nathanchance
x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
882de09 
[ Upstream commit 27b5de6 ]

LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: ClangBuiltLinux/linux#1665
Link: llvm/llvm-project@6f867f9
Link: https://lore.kernel.org/r/20230120165826.2469302-1-nathan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ARCH] x86_64 This bug impacts ARCH=x86_64 [BUG] llvm A bug that should be fixed in upstream LLVM feature-request Not a bug per-se [FIXED][LINUX] 6.2 This bug was fixed in Linux 6.2 [FIXED][LLVM] 16 This bug was fixed in LLVM 16.0
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@dileks @nickdesaulniers @phoebewang @nathanchance