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[Qemu-commits] [COMMIT a139aa1] target-ppc: permit linux-user to read PV
From: |
Anthony Liguori |
Subject: |
[Qemu-commits] [COMMIT a139aa1] target-ppc: permit linux-user to read PVR |
Date: |
Tue, 23 Jun 2009 17:17:27 -0000 |
From: Nathan Froyd <address@hidden>
Access to the PVR SPR is normally forbidden from userspace apps. The
Linux kernel, however, fixes up reads in the appropriate trap handler.
To permit applications that read PVR to run on QEMU, then, we need to
implement the same handling of PVR reads.
Signed-off-by: Nathan Froyd <address@hidden>
Signed-off-by: malc <address@hidden>
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 8708364..04225e5 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -8903,7 +8903,13 @@ static void init_ppc_proc (CPUPPCState *env, const
ppc_def_t *def)
/* Register SPR common to all PowerPC implementations */
gen_spr_generic(env);
spr_register(env, SPR_PVR, "PVR",
- SPR_NOACCESS, SPR_NOACCESS,
+ /* Linux permits userspace to read PVR */
+#if defined(CONFIG_LINUX_USER)
+ &spr_read_generic,
+#else
+ SPR_NOACCESS,
+#endif
+ SPR_NOACCESS,
&spr_read_generic, SPR_NOACCESS,
def->pvr);
/* Register SVR if it's defined to anything else than POWERPC_SVR_NONE */
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