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From: Halil Pasic <pasic@linux.ibm.com>
To: Matthew Rosato <mjrosato@linux.ibm.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	qemu-s390x@nongnu.org, qemu-devel@nongnu.org
Cc: Halil Pasic <pasic@linux.ibm.com>, Thomas Huth <thuth@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Richard Henderson <rth@twiddle.net>
Subject: [PATCH 0/2] two atomic_cmpxchg() related fixes
Date: Tue, 16 Jun 2020 06:50:33 +0200
Message-ID: <20200616045035.51641-1-pasic@linux.ibm.com> (raw)

The story short: compiler can generate code that does two
distinct fetches of *ind_addr for old and _old. If that happens we can
not figure out if we had the desired xchg or not.

Halil Pasic (2):
  virtio-ccw: fix virtio_set_ind_atomic
  s390x/pci: fix set_ind_atomic

 hw/s390x/s390-pci-bus.c | 16 +++++++++-------
 hw/s390x/virtio-ccw.c   | 18 ++++++++++--------
 2 files changed, 19 insertions(+), 15 deletions(-)


base-commit: 7d3660e79830a069f1848bb4fa1cdf8f666424fb
-- 
2.17.1



             reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-16  4:50 Halil Pasic [this message]
2020-06-16  4:50 ` [PATCH 1/2] virtio-ccw: fix virtio_set_ind_atomic Halil Pasic
2020-06-16  5:58   ` Christian Borntraeger
2020-06-16  6:33     ` Cornelia Huck
2020-06-16  6:45       ` Christian Borntraeger
2020-06-19  7:14         ` Cornelia Huck
2020-06-17 23:56       ` Halil Pasic
2020-06-19  7:33         ` David Hildenbrand
2020-06-19  8:17           ` Halil Pasic
2020-06-16  9:31     ` Halil Pasic
2020-07-01 13:13   ` Christian Borntraeger
2020-07-04 18:34   ` Michael S. Tsirkin
2020-07-06  5:44     ` Christian Borntraeger
2020-07-06 11:19     ` Halil Pasic
2020-06-16  4:50 ` [PATCH 2/2] s390x/pci: fix set_ind_atomic Halil Pasic
2020-07-01 13:14   ` Christian Borntraeger
2020-07-01 12:01 ` [PATCH 0/2] two atomic_cmpxchg() related fixes Cornelia Huck
2020-07-01 12:06   ` Christian Borntraeger
2020-07-01 13:10     ` Cornelia Huck
2020-07-03 13:37     ` Halil Pasic
2020-07-03 14:03       ` Cornelia Huck
2020-07-02 11:18 ` Cornelia Huck

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