powerpc: Add NAP mode support on Power7 in HV mode

Wakeup comes from the system reset handler with a potential loss of
the non-hypervisor CPU state. We save the non-volatile state on the
stack and a pointer to it in the PACA, which the system reset handler
uses to restore things

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 1255569387b6..384a96db794a 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -56,6 +56,9 @@
 #define PPC_INST_TLBSRX_DOT             0x7c0006a5
 #define PPC_INST_XXLOR                  0xf0000510
 
+#define PPC_INST_NAP                    0x4c000364
+#define PPC_INST_SLEEP                  0x4c0003a4
+
 /* macros to insert fields into opcodes */
 #define __PPC_RA(a)     (((a) & 0x1f) << 16)
 #define __PPC_RB(b)     (((b) & 0x1f) << 11)
@@ -126,4 +129,7 @@
 #define XXLOR(t, a, b)          stringify_in_c(.long PPC_INST_XXLOR | \
                                                VSX_XX3((t), (a), (b)))
 
+#define PPC_NAP                 stringify_in_c(.long PPC_INST_NAP)
+#define PPC_SLEEP               stringify_in_c(.long PPC_INST_SLEEP)
+
 #endif /* _ASM_POWERPC_PPC_OPCODE_H */