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[V3,3/7] cputlb: fix the way get_page_addr_code fills the tlb

Message ID 1493391576-29401-4-git-send-email-fred.konrad@greensocs.com (mailing list archive)
State New, archived
Headers show

Commit Message

KONRAD Frédéric April 28, 2017, 2:59 p.m. UTC 
From: KONRAD Frederic <fred.konrad@greensocs.com>

get_page_addr_code(..) does a cpu_ldub_code to fill the tlb:
This can lead to some side effects if a device is mapped at this address.

So this patch replaces the cpu_memory_ld by a tlb_fill.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
---
 cputlb.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/cputlb.c b/cputlb.c
index ad1d983..5f6757e 100644
--- a/cputlb.c
+++ b/cputlb.c
@@ -849,8 +849,10 @@  tb_page_addr_t get_page_addr_code(CPUArchState *env, target_ulong addr)
     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
     mmu_idx = cpu_mmu_index(env, true);
     if (unlikely(env->tlb_table[mmu_idx][index].addr_code !=
-                 (addr & TARGET_PAGE_MASK))) {
-        cpu_ldub_code(env, addr);
+                 (addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK)))) {
+        if (!VICTIM_TLB_HIT(addr_read, addr)) {
+            tlb_fill(ENV_GET_CPU(env), addr, MMU_INST_FETCH, mmu_idx, 0);
+        }
     }
     iotlbentry = &env->iotlb[mmu_idx][index];
     pd = iotlbentry->addr & ~TARGET_PAGE_MASK;