selftests/powerpc: Use mfspr/mtspr macros

No need to write inline asm for mtspr/mfspr, we have macros for this
in reg.h
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221128041948.58339-2-bgray@linux.ibm.com

tools/testing/selftests/powerpc/dscr/dscr.h

@@ -23,6 +23,7 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 
+#include "reg.h"
 #include "utils.h"
 
 #define THREADS		100	/* Max threads */
@@ -41,31 +42,23 @@
 /* Prilvilege state DSCR access */
 inline unsigned long get_dscr(void)
 {
-	unsigned long ret;
-
-	asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR_PRIV));
-
-	return ret;
+	return mfspr(SPRN_DSCR_PRIV);
 }
 
 inline void set_dscr(unsigned long val)
 {
-	asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR_PRIV));
+	mtspr(SPRN_DSCR_PRIV, val);
 }
 
 /* Problem state DSCR access */
 inline unsigned long get_dscr_usr(void)
 {
-	unsigned long ret;
-
-	asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR));
-
-	return ret;
+	return mfspr(SPRN_DSCR);
 }
 
 inline void set_dscr_usr(unsigned long val)
 {
-	asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
+	mtspr(SPRN_DSCR, val);
 }
 
 /* Default DSCR access */

tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c

@@ -23,6 +23,7 @@
 #include <sys/syscall.h>
 #include <linux/limits.h>
 #include "ptrace.h"
+#include "reg.h"
 
 #define SPRN_PVR	0x11F
 #define PVR_8xx		0x00500000
@@ -620,10 +621,7 @@ static int ptrace_hwbreak(void)
 
 int main(int argc, char **argv, char **envp)
 {
-	int pvr = 0;
-	asm __volatile__ ("mfspr %0,%1" : "=r"(pvr) : "i"(SPRN_PVR));
-	if (pvr == PVR_8xx)
-		is_8xx = true;
+	is_8xx = mfspr(SPRN_PVR) == PVR_8xx;
 
 	return test_harness(ptrace_hwbreak, "ptrace-hwbreak");
 }

tools/testing/selftests/powerpc/ptrace/ptrace.h

@@ -745,10 +745,7 @@ int show_tm_spr(pid_t child, struct tm_spr_regs *out)
 /* Analyse TEXASR after TM failure */
 inline unsigned long get_tfiar(void)
 {
-	unsigned long ret;
-
-	asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_TFIAR));
-	return ret;
+	return mfspr(SPRN_TFIAR);
 }
 
 void analyse_texasr(unsigned long texasr)

tools/testing/selftests/powerpc/security/flush_utils.c

@@ -14,6 +14,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <sys/utsname.h>
+#include "reg.h"
 #include "utils.h"
 #include "flush_utils.h"
 
@@ -79,5 +80,5 @@ void set_dscr(unsigned long val)
 		init = 1;
 	}
 
-	asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
+	mtspr(SPRN_DSCR, val);
 }