From: Peter Zijlstra <peterz@infradead.org>
To: bpf@vger.kernel.org
Subject: [PATCH bpf-next 09/17] x86/retpoline: Move the retpoline thunk declarations to nospec-branch.h
Date: Wed, 27 Oct 2021 10:52:52 +0200 [thread overview]
Message-ID: <20211027085520.613752336@infradead.org> (raw)
In-Reply-To: 20211027085243.008677168@infradead.org
Because it makes no sense to split the retpoline gunk over multiple
headers.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/include/asm/asm-prototypes.h | 8 --------
arch/x86/include/asm/nospec-branch.h | 7 +++++++
arch/x86/net/bpf_jit_comp.c | 1 -
3 files changed, 7 insertions(+), 9 deletions(-)
--- a/arch/x86/include/asm/asm-prototypes.h
+++ b/arch/x86/include/asm/asm-prototypes.h
@@ -17,11 +17,3 @@
extern void cmpxchg8b_emu(void);
#endif
-#ifdef CONFIG_RETPOLINE
-
-#define GEN(reg) \
- extern asmlinkage void __x86_indirect_thunk_ ## reg (void);
-#include <asm/GEN-for-each-reg.h>
-#undef GEN
-
-#endif /* CONFIG_RETPOLINE */
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -5,6 +5,7 @@
#include <linux/static_key.h>
#include <linux/objtool.h>
+#include <linux/linkage.h>
#include <asm/alternative.h>
#include <asm/cpufeatures.h>
@@ -118,6 +119,12 @@
".popsection\n\t"
#ifdef CONFIG_RETPOLINE
+
+#define GEN(reg) \
+ extern asmlinkage void __x86_indirect_thunk_ ## reg (void);
+#include <asm/GEN-for-each-reg.h>
+#undef GEN
+
#ifdef CONFIG_X86_64
/*
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -15,7 +15,6 @@
#include <asm/set_memory.h>
#include <asm/nospec-branch.h>
#include <asm/text-patching.h>
-#include <asm/asm-prototypes.h>
static u8 *emit_code(u8 *ptr, u32 bytes, unsigned int len)
{
next prev parent reply other threads:[~2021-10-27 8:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-27 8:52 [PATCH bpf-next 00/17] x86: Rewrite the retpoline rewrite logic Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 01/17] objtool: Handle __sanitize_cov*() tail calls Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 02/17] objtool: Classify symbols Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 03/17] objtool: Explicitly avoid self modifying code in .altinstr_replacement Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 04/17] objtool: Shrink struct instruction Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 05/17] objtool,x86: Replace alternatives with .retpoline_sites Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 06/17] x86/retpoline: Remove unused replacement symbols Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 07/17] x86/asm: Fix register order Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 08/17] x86/asm: Fixup odd GEN-for-each-reg.h usage Peter Zijlstra
2021-10-27 8:52 ` Peter Zijlstra [this message]
2021-10-27 8:52 ` [PATCH bpf-next 10/17] x86/retpoline: Create a retpoline thunk array Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 11/17] x86/alternative: Implement .retpoline_sites support Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 12/17] x86/alternative: Handle Jcc __x86_indirect_thunk_\reg Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 13/17] x86/alternative: Try inline spectre_v2=retpoline,amd Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 14/17] x86/alternative: Add debug prints to apply_retpolines() Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 15/17] x86,bugs: Unconditionally allow spectre_v2=retpoline,amd Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 16/17] bpf, x86: Simplify computing label offsets Peter Zijlstra
2021-10-27 8:53 ` [PATCH bpf-next 17/17] bpf,x86: Respect X86_FEATURE_RETPOLINE* Peter Zijlstra
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