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Message-ID: <20220919101521.609602902@infradead.org>
Date: Mon, 19 Sep 2022 11:59:58 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: peterz@...radead.org
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Subject: [PATCH v2 19/44] cpuidle,intel_idle: Fix CPUIDLE_FLAG_INIT_XSTATE
vmlinux.o: warning: objtool: intel_idle_s2idle+0xd5: call to fpu_idle_fpregs() leaves .noinstr.text section
vmlinux.o: warning: objtool: intel_idle_xstate+0x11: call to fpu_idle_fpregs() leaves .noinstr.text section
vmlinux.o: warning: objtool: fpu_idle_fpregs+0x9: call to xfeatures_in_use() leaves .noinstr.text section
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
arch/x86/include/asm/fpu/xcr.h | 4 ++--
arch/x86/include/asm/special_insns.h | 2 +-
arch/x86/kernel/fpu/core.c | 4 ++--
3 files changed, 5 insertions(+), 5 deletions(-)
--- a/arch/x86/include/asm/fpu/xcr.h
+++ b/arch/x86/include/asm/fpu/xcr.h
@@ -5,7 +5,7 @@
#define XCR_XFEATURE_ENABLED_MASK 0x00000000
#define XCR_XFEATURE_IN_USE_MASK 0x00000001
-static inline u64 xgetbv(u32 index)
+static __always_inline u64 xgetbv(u32 index)
{
u32 eax, edx;
@@ -27,7 +27,7 @@ static inline void xsetbv(u32 index, u64
*
* Callers should check X86_FEATURE_XGETBV1.
*/
-static inline u64 xfeatures_in_use(void)
+static __always_inline u64 xfeatures_in_use(void)
{
return xgetbv(XCR_XFEATURE_IN_USE_MASK);
}
--- a/arch/x86/include/asm/special_insns.h
+++ b/arch/x86/include/asm/special_insns.h
@@ -295,7 +295,7 @@ static inline int enqcmds(void __iomem *
return 0;
}
-static inline void tile_release(void)
+static __always_inline void tile_release(void)
{
/*
* Instruction opcode for TILERELEASE; supported in binutils
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -856,12 +856,12 @@ int fpu__exception_code(struct fpu *fpu,
* Initialize register state that may prevent from entering low-power idle.
* This function will be invoked from the cpuidle driver only when needed.
*/
-void fpu_idle_fpregs(void)
+noinstr void fpu_idle_fpregs(void)
{
/* Note: AMX_TILE being enabled implies XGETBV1 support */
if (cpu_feature_enabled(X86_FEATURE_AMX_TILE) &&
(xfeatures_in_use() & XFEATURE_MASK_XTILE)) {
tile_release();
- fpregs_deactivate(¤t->thread.fpu);
+ __this_cpu_write(fpu_fpregs_owner_ctx, NULL);
}
}
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