[Qemu-devel] [PATCH] PPC: Add PIR register to POWER7 CPU

[Nathan Whitehorn <nwhitehorn@freebsd.org>]

The POWER7 emulation is missing the Processor Identification Register, 
mandatory in recent POWER CPUs, that is required for SMP on at least 
some operating systems (e.g. FreeBSD) to function properly. This patch 
copies the existing PIR code from the other CPUs that implement it.

Signed-off-by: Nathan Whitehorn <nwhitehorn@freebsd.org>
---
  target-ppc/translate_init.c |    5 +++++
  1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 8a7233f..01f4030 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -6537,6 +6537,11 @@ static void init_proc_POWER7 (CPUPPCState *env)
      /* Time base */
      gen_tbl(env);
  #if !defined(CONFIG_USER_ONLY)
+    /* Processor identification */
+    spr_register(env, SPR_PIR, "PIR",
+                 SPR_NOACCESS, SPR_NOACCESS,
+ &spr_read_generic, &spr_write_pir,
+                 0x00000000);
      /* PURR & SPURR: Hack - treat these as aliases for the TB for now */
      spr_register(env, SPR_PURR,   "PURR",
&spr_read_purr, SPR_NOACCESS,
--
1.7.9