[SPARC64]: Add initial code to twiddle %gl on trap entry/exit.
Instead of setting/clearing PSTATE_AG we have to change
the %gl register value on sun4v.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index 4f28a85..8666440 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -73,6 +73,11 @@
extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
#endif
+struct gl_1insn_patch_entry {
+ unsigned int addr;
+ unsigned int insn;
+};
+extern struct gl_1insn_patch_entry __gl_1insn_patch, __gl_1insn_patch_end;
#endif /* !(__ASSEMBLY__) */
#define TRAP_PER_CPU_THREAD 0x00
diff --git a/include/asm-sparc64/head.h b/include/asm-sparc64/head.h
index 731c842..ff76c09 100644
--- a/include/asm-sparc64/head.h
+++ b/include/asm-sparc64/head.h
@@ -4,6 +4,10 @@
#include <asm/pstate.h>
+ /* wrpr %g0, val, %gl */
+#define SET_GL(val) \
+ .word 0xa1902000 | val
+
#define KERNBASE 0x400000
#define PTREGS_OFF (STACK_BIAS + STACKFRAME_SZ)