[PULL,08/18] target/ppc: Enforce that the root page directory size must be at least 5

Commit Message

David Gibson May 7, 2020, 5:02 a.m. UTC

From: Suraj Jitindar Singh <[e-mail]>

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 <[e-mail]>
Reviewed-by: David Gibson <[e-mail]>
Signed-off-by: Cédric Le Goater <[e-mail]>
Message-Id: <[e-mail]>
Reviewed-by: Greg Kurz <[e-mail]>
Signed-off-by: David Gibson <[e-mail]>
---
 target/ppc/mmu-radix64.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c
index 224e646c50..9967857058 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;
 }