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authorThomas Gleixner <tglx@linutronix.de>2022-09-15 13:10:50 +0200
committerPeter Zijlstra <peterz@infradead.org>2022-10-17 16:40:59 +0200
commit1d293758e548aa6ff65e4dd3f5a9bc2a34b38ce3 (patch)
treeb11599591dda098388b26fe07291e5cef69064f8 /arch
parent1934dc9a8a92fda36ab80cfd55edab1708dcdf9a (diff)
x86/paravirt: Properly align PV functions
Ensure inline asm functions are consistently aligned with compiler generated and SYM_FUNC_START*() functions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20220915111144.038540008@infradead.org
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/paravirt.h1
-rw-r--r--arch/x86/include/asm/qspinlock_paravirt.h2
-rw-r--r--arch/x86/kernel/kvm.c1
-rw-r--r--arch/x86/kernel/paravirt.c2
4 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 2a0b8dd4ec33..1be66c15ecbd 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -665,6 +665,7 @@ bool __raw_callee_save___native_vcpu_is_preempted(long cpu);
asm(".pushsection " section ", \"ax\";" \
".globl " PV_THUNK_NAME(func) ";" \
".type " PV_THUNK_NAME(func) ", @function;" \
+ ASM_FUNC_ALIGN \
PV_THUNK_NAME(func) ":" \
ASM_ENDBR \
FRAME_BEGIN \
diff --git a/arch/x86/include/asm/qspinlock_paravirt.h b/arch/x86/include/asm/qspinlock_paravirt.h
index 60ece592b220..082551b3c75e 100644
--- a/arch/x86/include/asm/qspinlock_paravirt.h
+++ b/arch/x86/include/asm/qspinlock_paravirt.h
@@ -40,7 +40,7 @@ __PV_CALLEE_SAVE_REGS_THUNK(__pv_queued_spin_unlock_slowpath, ".spinlock.text");
asm (".pushsection .spinlock.text;"
".globl " PV_UNLOCK ";"
".type " PV_UNLOCK ", @function;"
- ".align 4,0x90;"
+ ASM_FUNC_ALIGN
PV_UNLOCK ": "
ASM_ENDBR
FRAME_BEGIN
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index d4e48b4a438b..95fb85bea111 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -802,6 +802,7 @@ asm(
".pushsection .text;"
".global __raw_callee_save___kvm_vcpu_is_preempted;"
".type __raw_callee_save___kvm_vcpu_is_preempted, @function;"
+ASM_FUNC_ALIGN
"__raw_callee_save___kvm_vcpu_is_preempted:"
ASM_ENDBR
"movq __per_cpu_offset(,%rdi,8), %rax;"
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 7ca2d46c08cc..e244c49b52d7 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -40,6 +40,7 @@
extern void _paravirt_nop(void);
asm (".pushsection .entry.text, \"ax\"\n"
".global _paravirt_nop\n"
+ ASM_FUNC_ALIGN
"_paravirt_nop:\n\t"
ASM_ENDBR
ASM_RET
@@ -50,6 +51,7 @@ asm (".pushsection .entry.text, \"ax\"\n"
/* stub always returning 0. */
asm (".pushsection .entry.text, \"ax\"\n"
".global paravirt_ret0\n"
+ ASM_FUNC_ALIGN
"paravirt_ret0:\n\t"
ASM_ENDBR
"xor %" _ASM_AX ", %" _ASM_AX ";\n\t"