[PATCH 7/7] target/ppc: Enforce that the root page directory size must be at least 5

[Cédric Le Goater]

From: Suraj Jitindar Singh <address@hidden>

According to the ISA the root page directory size of a radix tree for
either process or partition scoped translation must be >= 5.

Thus add this to the list of conditions checked when validating the
partition table entry in validate_pate();

Signed-off-by: Suraj Jitindar Singh <address@hidden>
Reviewed-by: David Gibson <address@hidden>
[clg: - checkpatch fixes ]
Signed-off-by: Cédric Le Goater <address@hidden>
---
 target/ppc/mmu-radix64.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c
index 066e324464db..b8ecb8fa1d51 100644
--- a/target/ppc/mmu-radix64.c
+++ b/target/ppc/mmu-radix64.c
@@ -212,6 +212,9 @@ static bool validate_pate(PowerPCCPU *cpu, uint64_t lpid, 
ppc_v3_pate_t *pate)
     if (lpid == 0 && !msr_hv) {
         return false;
     }
+    if ((pate->dw0 & PATE1_R_PRTS) < 5) {
+        return false;
+    }
     /* More checks ... */
     return true;
 }
-- 
2.21.0