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[Qemu-ppc] [PATCH v2] spapr: Add ibm, purr property on power7 and newer

From: Alexey Kardashevskiy
Subject: [Qemu-ppc] [PATCH v2] spapr: Add ibm, purr property on power7 and newer
Date: Fri, 27 Sep 2013 18:11:51 +1000

PAPR+ says that no "ibm,purr" tells the guest that H_PURR is not
supported. However some guests still try calling H_PURR on POWER7 unless
the property is present and equal to 0. This adds the property for CPUs
supporting the PURR special register.

Signed-off-by: Benjamin Herrenschmidt <address@hidden>
Signed-off-by: Alexey Kardashevskiy <address@hidden>
* the property is set now if PURR register is supported by QEMU
(at the moment it is POWER7, POWER7+, POWER8)
 hw/ppc/spapr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index bca91d9..07ff4cf 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -485,6 +485,10 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
                            gservers_prop, sizeof(gservers_prop))));
+        if (env->spr_cb[SPR_PURR].oea_read) {
+            _FDT((fdt_property(fdt, "ibm,purr", NULL, 0)));
+        }
         if (env->mmu_model & POWERPC_MMU_1TSEG) {
             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
                                segs, sizeof(segs))));

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