x86/paravirt: Move thunk macros to paravirt_types.h

The macros for generating PV-thunks are part of the generic paravirt
infrastructure, so they should be in paravirt_types.h.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260105110520.21356-5-jgross@suse.com

Author: jgross1

arch/x86/include/asm/paravirt.h

@@ -581,74 +581,6 @@ bool __raw_callee_save___native_vcpu_is_preempted(long cpu);
 
 #endif /* SMP && PARAVIRT_SPINLOCKS */
 
-#ifdef CONFIG_X86_32
-/* save and restore all caller-save registers, except return value */
-#define PV_SAVE_ALL_CALLER_REGS		"pushl %ecx;"
-#define PV_RESTORE_ALL_CALLER_REGS	"popl  %ecx;"
-#else
-/* save and restore all caller-save registers, except return value */
-#define PV_SAVE_ALL_CALLER_REGS						\
-	"push %rcx;"							\
-	"push %rdx;"							\
-	"push %rsi;"							\
-	"push %rdi;"							\
-	"push %r8;"							\
-	"push %r9;"							\
-	"push %r10;"							\
-	"push %r11;"
-#define PV_RESTORE_ALL_CALLER_REGS					\
-	"pop %r11;"							\
-	"pop %r10;"							\
-	"pop %r9;"							\
-	"pop %r8;"							\
-	"pop %rdi;"							\
-	"pop %rsi;"							\
-	"pop %rdx;"							\
-	"pop %rcx;"
-#endif
-
-/*
- * Generate a thunk around a function which saves all caller-save
- * registers except for the return value.  This allows C functions to
- * be called from assembler code where fewer than normal registers are
- * available.  It may also help code generation around calls from C
- * code if the common case doesn't use many registers.
- *
- * When a callee is wrapped in a thunk, the caller can assume that all
- * arg regs and all scratch registers are preserved across the
- * call. The return value in rax/eax will not be saved, even for void
- * functions.
- */
-#define PV_THUNK_NAME(func) "__raw_callee_save_" #func
-#define __PV_CALLEE_SAVE_REGS_THUNK(func, section)			\
-	extern typeof(func) __raw_callee_save_##func;			\
-									\
-	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							\
-	    PV_SAVE_ALL_CALLER_REGS					\
-	    "call " #func ";"						\
-	    PV_RESTORE_ALL_CALLER_REGS					\
-	    FRAME_END							\
-	    ASM_RET							\
-	    ".size " PV_THUNK_NAME(func) ", .-" PV_THUNK_NAME(func) ";"	\
-	    ".popsection")
-
-#define PV_CALLEE_SAVE_REGS_THUNK(func)			\
-	__PV_CALLEE_SAVE_REGS_THUNK(func, ".text")
-
-/* Get a reference to a callee-save function */
-#define PV_CALLEE_SAVE(func)						\
-	((struct paravirt_callee_save) { __raw_callee_save_##func })
-
-/* Promise that "func" already uses the right calling convention */
-#define __PV_IS_CALLEE_SAVE(func)			\
-	((struct paravirt_callee_save) { func })
-
 #ifdef CONFIG_PARAVIRT_XXL
 static __always_inline unsigned long arch_local_save_flags(void)
 {

arch/x86/include/asm/paravirt_types.h

@@ -512,5 +512,73 @@ unsigned long pv_native_read_cr2(void);
 
 #define ALT_NOT_XEN	ALT_NOT(X86_FEATURE_XENPV)
 
+#ifdef CONFIG_X86_32
+/* save and restore all caller-save registers, except return value */
+#define PV_SAVE_ALL_CALLER_REGS		"pushl %ecx;"
+#define PV_RESTORE_ALL_CALLER_REGS	"popl  %ecx;"
+#else
+/* save and restore all caller-save registers, except return value */
+#define PV_SAVE_ALL_CALLER_REGS						\
+	"push %rcx;"							\
+	"push %rdx;"							\
+	"push %rsi;"							\
+	"push %rdi;"							\
+	"push %r8;"							\
+	"push %r9;"							\
+	"push %r10;"							\
+	"push %r11;"
+#define PV_RESTORE_ALL_CALLER_REGS					\
+	"pop %r11;"							\
+	"pop %r10;"							\
+	"pop %r9;"							\
+	"pop %r8;"							\
+	"pop %rdi;"							\
+	"pop %rsi;"							\
+	"pop %rdx;"							\
+	"pop %rcx;"
+#endif
+
+/*
+ * Generate a thunk around a function which saves all caller-save
+ * registers except for the return value.  This allows C functions to
+ * be called from assembler code where fewer than normal registers are
+ * available.  It may also help code generation around calls from C
+ * code if the common case doesn't use many registers.
+ *
+ * When a callee is wrapped in a thunk, the caller can assume that all
+ * arg regs and all scratch registers are preserved across the
+ * call. The return value in rax/eax will not be saved, even for void
+ * functions.
+ */
+#define PV_THUNK_NAME(func) "__raw_callee_save_" #func
+#define __PV_CALLEE_SAVE_REGS_THUNK(func, section)			\
+	extern typeof(func) __raw_callee_save_##func;			\
+									\
+	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							\
+	    PV_SAVE_ALL_CALLER_REGS					\
+	    "call " #func ";"						\
+	    PV_RESTORE_ALL_CALLER_REGS					\
+	    FRAME_END							\
+	    ASM_RET							\
+	    ".size " PV_THUNK_NAME(func) ", .-" PV_THUNK_NAME(func) ";"	\
+	    ".popsection")
+
+#define PV_CALLEE_SAVE_REGS_THUNK(func)			\
+	__PV_CALLEE_SAVE_REGS_THUNK(func, ".text")
+
+/* Get a reference to a callee-save function */
+#define PV_CALLEE_SAVE(func)						\
+	((struct paravirt_callee_save) { __raw_callee_save_##func })
+
+/* Promise that "func" already uses the right calling convention */
+#define __PV_IS_CALLEE_SAVE(func)			\
+	((struct paravirt_callee_save) { func })
+
 #endif  /* CONFIG_PARAVIRT */
 #endif	/* _ASM_X86_PARAVIRT_TYPES_H */