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[v3,32/45] target/hppa: Only use EXCP_DTLB_MISS

Message ID 20180124232625.30105-33-richard.henderson@linaro.org
State Superseded
Headers show
Series hppa-softmmu | expand

Commit Message

Richard Henderson Jan. 24, 2018, 11:26 p.m. UTC 
Unknown why this works, but if we return EXCP_ITLB_MISS we
will triple-fault the first userland instruction fetch.
Is it something to do with having a combined I/DTLB?

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 target/hppa/mem_helper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

-- 
2.14.3
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Patch

diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c
index c14317ebef..81bcbe45db 100644
--- a/target/hppa/mem_helper.c
+++ b/target/hppa/mem_helper.c
@@ -97,7 +97,9 @@  int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx,
     if (ent == NULL || !ent->entry_valid) {
         phys = 0;
         prot = 0;
-        ret = (ifetch ? EXCP_ITLB_MISS : EXCP_DTLB_MISS);
+        /* ??? Unconditionally report data tlb miss,
+           even if this is an instruction fetch.  */
+        ret = EXCP_DTLB_MISS;
         goto egress;
     }