* Re: [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
@ 2014-07-30 5:24 ` Edgar E. Iglesias
2014-12-04 19:02 ` [Qemu-devel] [Bug 1349277] " Andy Whitcroft
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Edgar E. Iglesias @ 2014-07-30 5:24 UTC (permalink / raw)
To: Bug 1349277; +Cc: qemu-devel
On Mon, Jul 28, 2014 at 07:40:56AM -0000, T McIntosh wrote:
> Public bug reported:
>
> The AArch64 emulation ignores SPSel=0 when:
>
> (1) taking an interrupt from an exception level greater than EL0 (e.g.,
> EL1t),
>
> (2) returning from an exception (via ERET) to an exception level greater
> than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
>
> The attached patch fixes the problem in my application.
Hi,
Patches 1-3 in the following series fix the this problem.
http://lists.gnu.org/archive/html/qemu-devel/2014-06/msg03675.html
Cheers,
Edgar
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
2014-07-30 5:24 ` Edgar E. Iglesias
@ 2014-12-04 19:02 ` Andy Whitcroft
2014-12-04 20:11 ` Chris J Arges
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Andy Whitcroft @ 2014-12-04 19:02 UTC (permalink / raw)
To: qemu-devel
** Also affects: qemu (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
New
Status in qemu package in Ubuntu:
New
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
2014-07-30 5:24 ` Edgar E. Iglesias
2014-12-04 19:02 ` [Qemu-devel] [Bug 1349277] " Andy Whitcroft
@ 2014-12-04 20:11 ` Chris J Arges
2014-12-04 20:21 ` Ubuntu Foundations Team Bug Bot
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Chris J Arges @ 2014-12-04 20:11 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu (Ubuntu)
Assignee: (unassigned) => Chris J Arges (arges)
** Changed in: qemu (Ubuntu)
Status: New => In Progress
** Changed in: qemu (Ubuntu)
Importance: Undecided => Medium
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
New
Status in qemu package in Ubuntu:
In Progress
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
` (2 preceding siblings ...)
2014-12-04 20:11 ` Chris J Arges
@ 2014-12-04 20:21 ` Ubuntu Foundations Team Bug Bot
2014-12-04 20:51 ` Chris J Arges
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Ubuntu Foundations Team Bug Bot @ 2014-12-04 20:21 UTC (permalink / raw)
To: qemu-devel
The attachment "Proposed fix" seems to be a patch. If it isn't, please
remove the "patch" flag from the attachment, remove the "patch" tag, and
if you are a member of the ~ubuntu-reviewers, unsubscribe the team.
[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]
** Tags added: patch
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https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
New
Status in qemu package in Ubuntu:
In Progress
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
` (3 preceding siblings ...)
2014-12-04 20:21 ` Ubuntu Foundations Team Bug Bot
@ 2014-12-04 20:51 ` Chris J Arges
2014-12-04 22:01 ` Peter Maydell
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Chris J Arges @ 2014-12-04 20:51 UTC (permalink / raw)
To: qemu-devel
Uploaded fixed package for Vivid:
https://launchpad.net/ubuntu/+source/qemu/2.1+dfsg-7ubuntu3
Please let me know if this fixes the issue.
** Changed in: qemu (Ubuntu)
Status: In Progress => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
New
Status in qemu package in Ubuntu:
Fix Committed
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
` (4 preceding siblings ...)
2014-12-04 20:51 ` Chris J Arges
@ 2014-12-04 22:01 ` Peter Maydell
2014-12-05 17:44 ` Launchpad Bug Tracker
2016-06-28 14:51 ` T. Huth
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2014-12-04 22:01 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: New => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
Fix Committed
Status in qemu package in Ubuntu:
Fix Committed
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
` (5 preceding siblings ...)
2014-12-04 22:01 ` Peter Maydell
@ 2014-12-05 17:44 ` Launchpad Bug Tracker
2016-06-28 14:51 ` T. Huth
7 siblings, 0 replies; 9+ messages in thread
From: Launchpad Bug Tracker @ 2014-12-05 17:44 UTC (permalink / raw)
To: qemu-devel
This bug was fixed in the package qemu - 2.1+dfsg-7ubuntu3
---------------
qemu (2.1+dfsg-7ubuntu3) vivid; urgency=medium
* d/p/target-arm-A64-Break-out-aarch64_save-restore_sp.patch
d/p/target-arm-A64-Respect-SPSEL-in-ERET-SP-restore.patch
d/p/target-arm-A64-Respect-SPSEL-when-taking-exceptions.patch:
Cherry-pick of upstream patches in order to fix AArch64 emulation ignoring
SPSel=0 in certain conditions. (LP: #1349277)
-- Chris J Arges <chris.j.arges@canonical.com> Thu, 04 Dec 2014 14:17:01 -0600
** Changed in: qemu (Ubuntu)
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
Fix Committed
Status in qemu package in Ubuntu:
Fix Released
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread* [Qemu-devel] [Bug 1349277] Re: AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater
2014-07-28 7:40 [Qemu-devel] [Bug 1349277] [NEW] AArch64 emulation ignores SPSel=0 when taking (or returning from) an exception at EL1 or greater T McIntosh
` (6 preceding siblings ...)
2014-12-05 17:44 ` Launchpad Bug Tracker
@ 2016-06-28 14:51 ` T. Huth
7 siblings, 0 replies; 9+ messages in thread
From: T. Huth @ 2016-06-28 14:51 UTC (permalink / raw)
To: qemu-devel
** Changed in: qemu
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning from) an
exception at EL1 or greater
Status in QEMU:
Fix Released
Status in qemu package in Ubuntu:
Fix Released
Bug description:
The AArch64 emulation ignores SPSel=0 when:
(1) taking an interrupt from an exception level greater than EL0
(e.g., EL1t),
(2) returning from an exception (via ERET) to an exception level
greater than EL0 (e.g., EL1t), with SPSR_ELx[SPSel]=0.
The attached patch fixes the problem in my application.
Background:
I'm running a standalone application (toy OS) that is performing
preemptive multithreading between threads running at EL1t, with
exception handling / context switching occurring at EL1h. This bug
causes the stack pointer to be corrupted in the threads running at
EL1t (they end up with a version of the EL1h stack pointer (SP_EL1)).
Occurs in:
qemu-2.1.0-rc1 (found in)
commit c60a57ff497667780132a3fcdc1500c83af5d5c0 (current master)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1349277/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread