From: Shahab Vahedi <shahab.vahedi@gmail.com>
Date: Sat, 20 Apr 2019 07:22:37 +0000 (+0200)
Subject: cputlb: Fix io_readx() to respect the access_type
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ef5dae6805cce7b59d129d801bdc5db71bcbd60d;p=qemu.git

cputlb: Fix io_readx() to respect the access_type

This change adapts io_readx() to its input access_type. Currently
io_readx() treats any memory access as a read, although it has an
input argument "MMUAccessType access_type". This results in:

1) Calling the tlb_fill() only with MMU_DATA_LOAD
2) Considering only entry->addr_read as the tlb_addr

Buglink: https://bugs.launchpad.net/qemu/+bug/1825359
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Shahab Vahedi <shahab.vahedi@gmail.com>
Message-Id: <20190420072236.12347-1-shahab.vahedi@gmail.com>
[rth: Remove assert; fix expression formatting.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---

diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index 88cc8389e9..f2f618217d 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -878,10 +878,11 @@ static uint64_t io_readx(CPUArchState *env, CPUIOTLBEntry *iotlbentry,
         CPUTLBEntry *entry;
         target_ulong tlb_addr;
 
-        tlb_fill(cpu, addr, size, MMU_DATA_LOAD, mmu_idx, retaddr);
+        tlb_fill(cpu, addr, size, access_type, mmu_idx, retaddr);
 
         entry = tlb_entry(env, mmu_idx, addr);
-        tlb_addr = entry->addr_read;
+        tlb_addr = (access_type == MMU_DATA_LOAD ?
+                    entry->addr_read : entry->addr_code);
         if (!(tlb_addr & ~(TARGET_PAGE_MASK | TLB_RECHECK))) {
             /* RAM access */
             uintptr_t haddr = addr + entry->addend;