qemu/target-arm-Set-ISSIs16Bit-in-make_issinf.patch

From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 17 Jan 2020 14:09:31 +0000
Subject: target/arm: Set ISSIs16Bit in make_issinfo

Git-commit: 1a1fbc6cbb34c26d43d8360c66c1d21681af14a9

During the conversion to decodetree, the setting of
ISSIs16Bit got lost.  This causes the guest os to
incorrectly adjust trapping memory operations.

Cc: qemu-stable@nongnu.org
Fixes: 46beb58efbb8a2a32 ("target/arm: Convert T16, load (literal)")
Reported-by: Jeff Kubascik <jeff.kubascik@dornerworks.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200117004618.2742-3-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 target/arm/translate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 4d5d4bd8886c138196cec746f0e7..24e3d6619b202c78835dc068a2ce 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -8552,6 +8552,9 @@ static ISSInfo make_issinfo(DisasContext *s, int rd, bool p, bool w)
     /* ISS not valid if writeback */
     if (p && !w) {
         ret = rd;
+        if (s->base.pc_next - s->pc_curr == 2) {
+            ret |= ISSIs16Bit;
+        }
     } else {
         ret = ISSInvalid;
     }