Hi,
On 6/19/19 8:28 AM, Jan Beulich wrote:
On 19.06.19 at 09:06, <osstest-ad...@xenproject.org> wrote:
branch xen-4.10-testing
xenbranch xen-4.10-testing
job test-armhf-armhf-xl-arndale
testid debian-install
Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git
Tree: qemuu git://xenbits.xen.org/qemu-xen.git
Tree: xen git://xenbits.xen.org/xen.git
*** Found and reproduced problem changeset ***
Bug is in tree: xen git://xenbits.xen.org/xen.git
Bug introduced: 702c9146c00d65d1e9c5955335ba002505e97e09
Bug not present: 52220b5f437a8d03ba108e127e7d717657edf99c
Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/138005/
commit 702c9146c00d65d1e9c5955335ba002505e97e09
Author: Julien Grall <julien.gr...@arm.com>
Date: Mon Apr 29 15:05:16 2019 +0100
xen/arm: Add an isb() before reading CNTPCT_EL0 to prevent re-ordering
Per D8.2.1 in ARM DDI 0487C.a, "a read to CNTPCT_EL0 can occur
speculatively and out of order relative to other instructions executed
on the same PE."
Add an instruction barrier to get accurate number of cycles when
requested in get_cycles(). For the other users of CNPCT_EL0, replace by
a call to get_cycles().
This is part of XSA-295.
Signed-off-by: Julien Grall <julien.gr...@arm.com>
Acked-by: Stefano Stabellini <sstabell...@kernel.org>
Just in case you didn't notice this coming in.
I saw it this morning. But I fail to understand how the instruction
barrier will result in a timeout during the guest installation...
The more this only doesn't seem to appear on staging-4.12.
Cheers,
--
Julien Grall
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