diff mbox series

[v2,09/21] target/hppa: Perform access rights before protection id check

Message ID 20241005200600.493604-10-richard.henderson@linaro.org
State Superseded
Headers show
Series accel/tcg: Introduce tlb_fill_align hook | expand

Commit Message

Richard Henderson Oct. 5, 2024, 8:05 p.m. UTC 
In Chapter 5, Interruptions, the group 3 exceptions lists
"Data memory access rights trap" in priority order ahead of
"Data memory protection ID trap".

Swap these checks in hppa_get_physical_address.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/hppa/mem_helper.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Comments

Helge Deller Oct. 7, 2024, 9:15 p.m. UTC | #1 
On 10/5/24 22:05, Richard Henderson wrote:
> In Chapter 5, Interruptions, the group 3 exceptions lists
> "Data memory access rights trap" in priority order ahead of
> "Data memory protection ID trap".
>
> Swap these checks in hppa_get_physical_address.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>


Reviewed-by: Helge Deller <deller@gmx.de>

> ---
>   target/hppa/mem_helper.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c
index a386c80fa4..f027c494e2 100644
--- a/target/hppa/mem_helper.c
+++ b/target/hppa/mem_helper.c
@@ -267,6 +267,12 @@  int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx,
         goto egress;
     }
 
+    if (unlikely(!(prot & type))) {
+        /* Not allowed -- Inst/Data Memory Access Rights Fault. */
+        ret = (type & PAGE_EXEC) ? EXCP_IMP : EXCP_DMAR;
+        goto egress;
+    }
+
     /* access_id == 0 means public page and no check is performed */
     if (ent->access_id && MMU_IDX_TO_P(mmu_idx)) {
         int access_prot = (hppa_is_pa20(env)
@@ -281,12 +287,6 @@  int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx,
         prot &= access_prot;
     }
 
-    if (unlikely(!(prot & type))) {
-        /* Not allowed -- Inst/Data Memory Access Rights Fault. */
-        ret = (type & PAGE_EXEC) ? EXCP_IMP : EXCP_DMAR;
-        goto egress;
-    }
-
     /*
      * In priority order, check for conditions which raise faults.
      * Remove PROT bits that cover the condition we want to check,