* [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
@ 2019-09-19 1:42 Nathan Chancellor
2019-09-20 15:16 ` [Bug 1844597] " Peter Maydell
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: Nathan Chancellor @ 2019-09-19 1:42 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script available
[4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top of
4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
** Affects: qemu
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
New
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
@ 2019-09-20 15:16 ` Peter Maydell
2019-09-20 17:12 ` Nathan Chancellor
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2019-09-20 15:16 UTC (permalink / raw)
To: qemu-devel
Hi; could you attach all the binaries needed to repro this (zImage, dtb,
etc) to the bug please?
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
New
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
2019-09-20 15:16 ` [Bug 1844597] " Peter Maydell
@ 2019-09-20 17:12 ` Nathan Chancellor
2019-09-20 17:13 ` Nathan Chancellor
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Nathan Chancellor @ 2019-09-20 17:12 UTC (permalink / raw)
To: qemu-devel
Ugh, sorry, I forget that I can actually upload files to these platforms
:(
Done, let me know if you need anything else!
** Attachment added: "zImage"
https://bugs.launchpad.net/qemu/+bug/1844597/+attachment/5290032/+files/zImage
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
New
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
2019-09-20 15:16 ` [Bug 1844597] " Peter Maydell
2019-09-20 17:12 ` Nathan Chancellor
@ 2019-09-20 17:13 ` Nathan Chancellor
2019-09-20 17:37 ` Peter Maydell
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Nathan Chancellor @ 2019-09-20 17:13 UTC (permalink / raw)
To: qemu-devel
** Attachment added: "aspeed-bmc-opp-romulus.dtb"
https://bugs.launchpad.net/qemu/+bug/1844597/+attachment/5290033/+files/aspeed-bmc-opp-romulus.dtb
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
New
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
` (2 preceding siblings ...)
2019-09-20 17:13 ` Nathan Chancellor
@ 2019-09-20 17:37 ` Peter Maydell
2019-09-20 17:49 ` Peter Maydell
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2019-09-20 17:37 UTC (permalink / raw)
To: qemu-devel
Thanks. I've diagnosed the problem -- when we boot a kernel directly
into non-secure state on an AArch32 CPU which implements EL3, we need to
set the NSACR.{CP11,CP10} bits so that Non-Secure is allowed to use the
FPU, but we weren't doing that. The omission didn't matter until commit
fc1120a7f5 because before that point we were ignoring the NSACR trap
bits entirely... Patch coming up shortly.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
New
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
` (3 preceding siblings ...)
2019-09-20 17:37 ` Peter Maydell
@ 2019-09-20 17:49 ` Peter Maydell
2019-09-20 18:00 ` Nathan Chancellor
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2019-09-20 17:49 UTC (permalink / raw)
To: qemu-devel
Should be fixed by:
https://patchew.org/QEMU/20190920174039.3916-1-peter.maydell@linaro.org/
(which allows me to boot the kernel you attached at least as far as "didn't find a root filesystem").
** Changed in: qemu
Status: New => In Progress
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
In Progress
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
` (4 preceding siblings ...)
2019-09-20 17:49 ` Peter Maydell
@ 2019-09-20 18:00 ` Nathan Chancellor
2019-10-01 13:43 ` Peter Maydell
2020-01-09 13:35 ` Thomas Huth
7 siblings, 0 replies; 9+ messages in thread
From: Nathan Chancellor @ 2019-09-20 18:00 UTC (permalink / raw)
To: qemu-devel
I pulled down the fix, built locally, and can confirm that this resolves
the issue. Thank you for the quick patch!
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
In Progress
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
` (5 preceding siblings ...)
2019-09-20 18:00 ` Nathan Chancellor
@ 2019-10-01 13:43 ` Peter Maydell
2020-01-09 13:35 ` Thomas Huth
7 siblings, 0 replies; 9+ messages in thread
From: Peter Maydell @ 2019-10-01 13:43 UTC (permalink / raw)
To: qemu-devel
Fixed in master in commit ece628fcf69cbbd, which will be in the 4.2
release (also tagged for stable so will end up on the 4.1.x branch at
some point).
** Changed in: qemu
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/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
Fix Committed
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug 1844597] Re: fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
` (6 preceding siblings ...)
2019-10-01 13:43 ` Peter Maydell
@ 2020-01-09 13:35 ` Thomas Huth
7 siblings, 0 replies; 9+ messages in thread
From: Thomas Huth @ 2020-01-09 13:35 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/1844597
Title:
fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in
vfp_init on a clang built kernel
Status in QEMU:
Fix Released
Bug description:
Commit 4cdabee7d6d2 ("ARM: configs: aspeed_g5: Enable AST2600") [1] in
the Linux kernel enabled CONFIG_VFP. When building this config with
Clang, the resulting kernel does not boot after commit fc1120a7f5
("target/arm: Implement NSACR gating of floating point") [2] (present
since the 4.1.0 release).
The QEMU command:
qemu-system-arm -m 512m \
-machine romulus-bmc \
-no-reboot \
-dtb out/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb \
-initrd rootfs.cpio \
-display none \
-serial mon:stdio \
-kernel ${KBF}/arch/arm/boot/zImage
If it is needed, the rootfs we are using is provided at a link below
[3].
Debugging with QEMU reveals that the kernel panics in vfp_init,
specifically at the line:
vfpsid = fmrx(FPSID);
in arch/arm/vfp/vfpmodule.c because of an illegal instruction:
[ 0.058685] VFP support v0.3:
[ 0.059159] Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
[ 0.059525] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.0-next-20190918-dirty #1
[ 0.059547] Hardware name: Generic DT based system
[ 0.059702] PC is at vfp_init+0x50/0x1f4
[ 0.059721] LR is at vfp_init+0x4c/0x1f4
[ 0.059738] pc : [<80b0383c>] lr : [<80b03838>] psr: 60000153
[ 0.059756] sp : 9e497ec0 ip : 00000020 fp : 9e497ed8
[ 0.059773] r10: 00000000 r9 : ffffe000 r8 : 80c06048
[ 0.059792] r7 : 00000000 r6 : 80c0caac r5 : 80c6c418 r4 : 80b037ec
[ 0.059811] r3 : 00000000 r2 : 339aa372 r1 : 00000000 r0 : 00000012
[ 0.059859] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.059883] Control: 00c5387d Table: 80004008 DAC: 00000051
[ 0.059997] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 0.060048] Stack: (0x9e497ec0 to 0x9e498000)
[ 0.060205] 7ec0: 80b037ec 80b6bf0c 80b037ec ffffffff 00000000 00000000 9e497f48 80b01100
[ 0.060310] 7ee0: 00000000 9eeff9e0 80a85734 809eb9be 00000000 8014b7f4 9eeff9e0 80a85734
[ 0.060408] 7f00: 9e497f48 8014b7f4 000000a4 00000001 00000001 00000000 80b0133c 9e497f38
[ 0.060509] 7f20: 00000000 9eeff9d5 339aa372 80b6be80 80b6bf0c 00000000 00000000 00000000
[ 0.060606] 7f40: 00000000 00000000 9e497f70 80b01864 00000001 00000001 00000000 80b0133c
[ 0.060703] 7f60: 00000001 8085d268 00000000 00000000 9e497f80 80b01758 00000000 00000000
[ 0.060800] 7f80: 9e497f90 80b015e4 00000000 8085d268 9e497fa8 8085d27c 00000000 8085d268
[ 0.060897] 7fa0: 00000000 00000000 00000000 801010e8 00000000 00000000 00000000 00000000
[ 0.060993] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.061090] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 0.061625] [<80b0383c>] (vfp_init) from [<80b01100>] (do_one_initcall+0xa8/0x1e0)
[ 0.061722] [<80b01100>] (do_one_initcall) from [<80b01864>] (do_initcall_level+0xfc/0x12c)
[ 0.061742] [<80b01864>] (do_initcall_level) from [<80b01758>] (do_basic_setup+0x2c/0x3c)
[ 0.061759] [<80b01758>] (do_basic_setup) from [<80b015e4>] (kernel_init_freeable+0x68/0x104)
[ 0.061777] [<80b015e4>] (kernel_init_freeable) from [<8085d27c>] (kernel_init+0x14/0x26c)
[ 0.061798] [<8085d27c>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[ 0.061835] Exception stack(0x9e497fb0 to 0x9e497ff8)
[ 0.061896] 7fa0: 00000000 00000000 00000000 00000000
[ 0.061998] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 0.062080] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 0.062263] Code: e5860000 e59f0174 ebd9d8fc e59f5170 (eef04a10)
[ 0.062679] ---[ end trace 2d338c91e4e74562 ]---
Before fc1120a7f5:
[ 0.069418] VFP support v0.3: implementor 41 architecture 1 part 20
variant b rev 5
Should you need to reproduce this locally:
* clang 9.0.0 or later is needed to build this config. If you do not
have easy access to such a build, we have a clang build script
available [4] that can help with this:
% ./build-llvm.py --branch llvmorg-9.0.0-rc6 \
--build-stage1-only \
--projects clang \
--targets ARM
* Because of an unrelated build issue, linux-next needs to be used (or
the singular patch that resolves it needs to be cherry-picked on top
of 4cdabee7d6d2 [5]). The kernel make command used:
% make -j$(nproc) -s \
ARCH=arm \
CC=clang \
CROSS_COMPILE=arm-linux-gnueabi- \
O=out \
distclean aspeed_g5_defconfig all
[1]: https://git.kernel.org/linus/4cdabee7d6d2e439fea726a101e448c4ca6837f4
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=fc1120a7f5f2d4b601003205c598077d3eb11ad2
[3]: https://github.com/ClangBuiltLinux/continuous-integration/blob/800d84bf8c55ee04c50ed4c78144a96d889a91c5/images/arm/rootfs.cpio
[4]: https://github.com/ClangBuiltLinux/tc-build
[5]: http://git.armlinux.org.uk/cgit/linux-arm.git/commit/?id=7b3948597372e5a6b314208ac320362c204b7f0f
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1844597/+subscriptions
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2020-01-09 13:41 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-19 1:42 [Qemu-devel] [Bug 1844597] [NEW] fc1120a7f5f2d4b601003205c598077d3eb11ad2 causes a kernel panic in vfp_init on a clang built kernel Nathan Chancellor
2019-09-20 15:16 ` [Bug 1844597] " Peter Maydell
2019-09-20 17:12 ` Nathan Chancellor
2019-09-20 17:13 ` Nathan Chancellor
2019-09-20 17:37 ` Peter Maydell
2019-09-20 17:49 ` Peter Maydell
2019-09-20 18:00 ` Nathan Chancellor
2019-10-01 13:43 ` Peter Maydell
2020-01-09 13:35 ` Thomas Huth
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