[v1] s390x and qtest patches

[PULL 1/7] target/s390x: Define TARGET_HAS_PRECISE_SMC

Thomas Huth posted 7 patches 2 years, 5 months ago

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Maintainers: Richard Henderson <richard.henderson@linaro.org>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Thomas Huth <thuth@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <anisinha@redhat.com>, Laurent Vivier <lvivier@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>

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[PULL 1/7] target/s390x: Define TARGET_HAS_PRECISE_SMC

Posted by Thomas Huth 2 years, 5 months ago

From: Ilya Leoshkevich <iii@linux.ibm.com>

PoP (Sequence of Storage References -> Instruction Fetching) says:

    ... if a store that is conceptually earlier is
    made by the same CPU using the same effective
    address as that by which the instruction is subse-
    quently fetched, the updated information is obtained ...

QEMU already has support for this in the common code; enable it for
s390x.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230807114921.438881-1-iii@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 target/s390x/cpu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index eb5b65b7d3..304029e57c 100644
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -36,6 +36,8 @@
 /* The z/Architecture has a strong memory model with some store-after-load re-ordering */
 #define TCG_GUEST_DEFAULT_MO      (TCG_MO_ALL & ~TCG_MO_ST_LD)
 
+#define TARGET_HAS_PRECISE_SMC
+
 #define TARGET_INSN_START_EXTRA_WORDS 2
 
 #define MMU_USER_IDX 0
-- 
2.39.3