x86/svm: Drop wrappers of SVM instructions

The new toolchain baseline knows the SVM instructions.

Resolves: xen-project/xen#204

Signed-off-by: "Alexander M. Merritt" <alexander@edera.dev>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

xen/arch/x86/hvm/svm/svm.h

@@ -23,25 +23,17 @@ void __update_guest_eip(struct cpu_user_regs *regs, unsigned int inst_len);
 
 static inline void svm_vmload_pa(paddr_t vmcb)
 {
-    asm volatile (
-        ".byte 0x0f,0x01,0xda" /* vmload */
-        : : "a" (vmcb) : "memory" );
+    asm volatile ( "vmload" :: "a" (vmcb) : "memory" );
 }
 
 static inline void svm_vmsave_pa(paddr_t vmcb)
 {
-    asm volatile (
-        ".byte 0x0f,0x01,0xdb" /* vmsave */
-        : : "a" (vmcb) : "memory" );
+    asm volatile ( "vmsave" :: "a" (vmcb) : "memory" );
 }
 
 static inline void svm_invlpga(unsigned long linear, uint32_t asid)
 {
-    asm volatile (
-        ".byte 0x0f,0x01,0xdf"
-        : /* output */
-        : /* input */
-        "a" (linear), "c" (asid) );
+    asm volatile ( "invlpga" :: "a" (linear), "c" (asid) );
 }
 
 /*

xen/arch/x86/include/asm/asm-defns.h

@@ -1,17 +1,5 @@
 #include <asm/page-bits.h>
 
-.macro vmrun
-    .byte 0x0f, 0x01, 0xd8
-.endm
-
-.macro stgi
-    .byte 0x0f, 0x01, 0xdc
-.endm
-
-.macro clgi
-    .byte 0x0f, 0x01, 0xdd
-.endm
-
 /*
  * Call a noreturn function.  This could be JMP, but CALL results in a more
  * helpful backtrace.  BUG is to catch functions which do decide to return...