* [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment
@ 2017-06-21 17:51 Anatol Pomozov
2020-11-09 17:55 ` [Bug 1699567] " Thomas Huth
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: Anatol Pomozov @ 2017-06-21 17:51 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment. After
adjusting it at my side the OS works fine both with Qemu and KVM.
It would be great if QEMU followed specification more closely and forced
SSE data alignment requirements. It will help to catch alignment issues
early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1699567
Title:
Qemu does not force SSE data alignment
Status in QEMU:
New
Bug description:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment.
After adjusting it at my side the OS works fine both with Qemu and
KVM.
It would be great if QEMU followed specification more closely and
forced SSE data alignment requirements. It will help to catch
alignment issues early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1699567/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 1699567] Re: Qemu does not force SSE data alignment
2017-06-21 17:51 [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment Anatol Pomozov
@ 2020-11-09 17:55 ` Thomas Huth
2020-11-29 5:51 ` Daniel Bokser
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Thomas Huth @ 2020-11-09 17:55 UTC (permalink / raw)
To: qemu-devel
The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1699567
Title:
Qemu does not force SSE data alignment
Status in QEMU:
Incomplete
Bug description:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment.
After adjusting it at my side the OS works fine both with Qemu and
KVM.
It would be great if QEMU followed specification more closely and
forced SSE data alignment requirements. It will help to catch
alignment issues early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1699567/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 1699567] Re: Qemu does not force SSE data alignment
2017-06-21 17:51 [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment Anatol Pomozov
2020-11-09 17:55 ` [Bug 1699567] " Thomas Huth
@ 2020-11-29 5:51 ` Daniel Bokser
2020-11-29 6:00 ` Daniel Bokser
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Daniel Bokser @ 2020-11-29 5:51 UTC (permalink / raw)
To: qemu-devel
I am currently running into this bug on QEMU emulator version 5.1.0.
movaps unaligned access works fine in qemu, when it should throw a GP. Likewise, the same code on physical hardware throws a GP.
--
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https://bugs.launchpad.net/bugs/1699567
Title:
Qemu does not force SSE data alignment
Status in QEMU:
New
Bug description:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment.
After adjusting it at my side the OS works fine both with Qemu and
KVM.
It would be great if QEMU followed specification more closely and
forced SSE data alignment requirements. It will help to catch
alignment issues early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1699567/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 1699567] Re: Qemu does not force SSE data alignment
2017-06-21 17:51 [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment Anatol Pomozov
2020-11-09 17:55 ` [Bug 1699567] " Thomas Huth
2020-11-29 5:51 ` Daniel Bokser
@ 2020-11-29 6:00 ` Daniel Bokser
2020-11-30 15:25 ` Richard Henderson
2021-05-08 5:37 ` Thomas Huth
4 siblings, 0 replies; 6+ messages in thread
From: Daniel Bokser @ 2020-11-29 6:00 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: Incomplete => New
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1699567
Title:
Qemu does not force SSE data alignment
Status in QEMU:
New
Bug description:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment.
After adjusting it at my side the OS works fine both with Qemu and
KVM.
It would be great if QEMU followed specification more closely and
forced SSE data alignment requirements. It will help to catch
alignment issues early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1699567/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 1699567] Re: Qemu does not force SSE data alignment
2017-06-21 17:51 [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment Anatol Pomozov
` (2 preceding siblings ...)
2020-11-29 6:00 ` Daniel Bokser
@ 2020-11-30 15:25 ` Richard Henderson
2021-05-08 5:37 ` Thomas Huth
4 siblings, 0 replies; 6+ messages in thread
From: Richard Henderson @ 2020-11-30 15:25 UTC (permalink / raw)
To: qemu-devel
Yep. Long-standing bug.
** Changed in: qemu
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1699567
Title:
Qemu does not force SSE data alignment
Status in QEMU:
Confirmed
Bug description:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment.
After adjusting it at my side the OS works fine both with Qemu and
KVM.
It would be great if QEMU followed specification more closely and
forced SSE data alignment requirements. It will help to catch
alignment issues early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1699567/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 1699567] Re: Qemu does not force SSE data alignment
2017-06-21 17:51 [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment Anatol Pomozov
` (3 preceding siblings ...)
2020-11-30 15:25 ` Richard Henderson
@ 2021-05-08 5:37 ` Thomas Huth
4 siblings, 0 replies; 6+ messages in thread
From: Thomas Huth @ 2021-05-08 5:37 UTC (permalink / raw)
To: qemu-devel
This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:
https://gitlab.com/qemu-project/qemu/-/issues/217
** Changed in: qemu
Status: Confirmed => Expired
** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #217
https://gitlab.com/qemu-project/qemu/-/issues/217
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1699567
Title:
Qemu does not force SSE data alignment
Status in QEMU:
Expired
Bug description:
I have an OS that tries to use SSE operations. It works fine in qemu.
But it crashes when I try to run the OS at the host cpu using KVM.
The instruction that crahes with #GP(0) is
movaps ADDR,%xmm0
The documentation says ADDR has to be 16-bytes alignment otherwise #GP
is generated. And indeed the problem was with the data alignment.
After adjusting it at my side the OS works fine both with Qemu and
KVM.
It would be great if QEMU followed specification more closely and
forced SSE data alignment requirements. It will help to catch
alignment issues early and debug it easier.
$ qemu-system-x86_64 -version
QEMU emulator version 2.9.50 (v2.9.0-1363-g95eef1c68b)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1699567/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-05-08 5:47 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2017-06-21 17:51 [Qemu-devel] [Bug 1699567] [NEW] Qemu does not force SSE data alignment Anatol Pomozov
2020-11-09 17:55 ` [Bug 1699567] " Thomas Huth
2020-11-29 5:51 ` Daniel Bokser
2020-11-29 6:00 ` Daniel Bokser
2020-11-30 15:25 ` Richard Henderson
2021-05-08 5:37 ` Thomas Huth
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