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[PULL 02/16] target/s390x: Fix CLM with M3=0
From: |
Thomas Huth |
Subject: |
[PULL 02/16] target/s390x: Fix CLM with M3=0 |
Date: |
Mon, 24 Jul 2023 18:53:35 +0200 |
From: Ilya Leoshkevich <iii@linux.ibm.com>
When the mask is zero, access exceptions should still be recognized for
1 byte at the second-operand address. CC should be set to 0.
Cc: qemu-stable@nongnu.org
Fixes: defb0e3157af ("s390x: Implement opcode helpers")
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230724082032.66864-3-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
target/s390x/tcg/mem_helper.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c
index f417fb1183..84103251b9 100644
--- a/target/s390x/tcg/mem_helper.c
+++ b/target/s390x/tcg/mem_helper.c
@@ -667,6 +667,11 @@ uint32_t HELPER(clm)(CPUS390XState *env, uint32_t r1,
uint32_t mask,
HELPER_LOG("%s: r1 0x%x mask 0x%x addr 0x%" PRIx64 "\n", __func__, r1,
mask, addr);
+ if (!mask) {
+ /* Recognize access exceptions for the first byte */
+ probe_read(env, addr, 1, cpu_mmu_index(env, false), ra);
+ }
+
while (mask) {
if (mask & 8) {
uint8_t d = cpu_ldub_data_ra(env, addr, ra);
--
2.39.3
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