[Qemu-ppc] [RFC NO-MERGE 12/12] target/ppc: Set ISA 3.00 radix and hash bits in OV5

[Suraj Jitindar Singh]

The OV5 vector (option vector 5) of the chosen node is used by the host
to tell the guest about which features it supports from those which were
requested during CAS (client architecture support - the features the guest
claims support for).

Byte 24 of OV5 is used to show support for in memory tables (radix and/or
hash), segmentation (SLB or segment tables) and guest translation shoot
down (the ability of the guest to invalidate translation caches via either
H_CALLS or by using the appropriate instructions directly).

We (tcg at least) have support for H_REGISTER_PROC_TBL and thus can
support new hash and radix (bits 0 and 1 in byte 24 respectively), we don't
support segment tables and so don't set bit 2 or 3 to indicate that
segmentation must be via the SLB, and set bit 4 to indicate that the guest
can use shootdown instructions directly.

Signed-off-by: Suraj Jitindar Singh <address@hidden>
---
 hw/ppc/spapr.c              | 3 +++
 include/hw/ppc/spapr_ovec.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 55e8c81..3ef9dc4 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1951,6 +1951,9 @@ static void ppc_spapr_init(MachineState *machine)
     }
 
     spapr_ovec_set(spapr->ov5, OV5_FORM1_AFFINITY);
+    spapr_ovec_set(spapr->ov5, OV5_MMU_RADIX); /* We Support ISAv3 Radix Mode 
*/
+    spapr_ovec_set(spapr->ov5, OV5_MMU_HASH);  /* We Support ISAv3 Hash Mode */
+    spapr_ovec_set(spapr->ov5, OV5_SHOOTDOWN); /* We Support GTSE */
 
     /* advertise support for dedicated HP event source to guests */
     if (spapr->use_hotplug_event_source) {
diff --git a/include/hw/ppc/spapr_ovec.h b/include/hw/ppc/spapr_ovec.h
index 355a344..e414568 100644
--- a/include/hw/ppc/spapr_ovec.h
+++ b/include/hw/ppc/spapr_ovec.h
@@ -47,6 +47,9 @@ typedef struct sPAPROptionVector sPAPROptionVector;
 #define OV5_DRCONF_MEMORY       OV_BIT(2, 2)
 #define OV5_FORM1_AFFINITY      OV_BIT(5, 0)
 #define OV5_HP_EVT              OV_BIT(6, 5)
+#define OV5_MMU_RADIX           OV_BIT(24, 0)
+#define OV5_MMU_HASH            OV_BIT(24, 1)
+#define OV5_SHOOTDOWN           OV_BIT(24, 4)
 
 /* interfaces */
 sPAPROptionVector *spapr_ovec_new(void);
-- 
2.5.5