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s390x/tcg: ASI/ASGI/ALSI/ALSGI are atomic with Interlocked-acccess facility 1
authorDavid Hildenbrand <david@redhat.com>
Fri, 8 Dec 2017 16:01:59 +0000 (17:01 +0100)
committerCornelia Huck <cohuck@redhat.com>
Thu, 14 Dec 2017 16:56:54 +0000 (17:56 +0100)
commit0e9383bca8b92c4b457a46af0e351b7712984622
tree8a86d4da698b3a6e81173919deaa8f96b0967840tree | snapshot
parent5a59bc1de21921996545574822e92004629dbd37commit | diff
s390x/tcg: ASI/ASGI/ALSI/ALSGI are atomic with Interlocked-acccess facility 1

The semantics of ASI/ASGI/ALSI/ALSGI changed. Let's implement them just
like LOAD AND ADD, so they are atomic. Emulate old behavior.

This fixes random crashes when booting a Linux kernel compiled for
z196+ with SMP + MTTCG.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171208160207.26494-7-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
target/s390x/insn-data.def diff | blob | history
target/s390x/translate.c diff | blob | history
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