Intermitted EFI firmware splats on SoftIron

[Mark Brown]

Hi,

We've been seeing some intermittent splats from EFI on SoftIron in our
internal testing at Arm - they're not really reproducible but we figured
it was worth mentioning them.  The two examples below are from commit
bc1bb2a49bae915107fd58705ed (just a random commit from Linus' tree):

[    9.195519] [Firmware Bug]: Unable to handle write to read-only memory in EFI runtime service
[    9.204059] ------------[ cut here ]------------
[    9.208664] WARNING: CPU: 1 PID: 122 at drivers/firmware/efi/runtime-wrappers.c:113 efi_call_virt_check_flags+0x40/0xa4
[    9.219443] Modules linked in: ip_tables x_tables ipv6
[    9.224577] CPU: 1 PID: 122 Comm: kworker/u16:14 Tainted: G        W I        6.3.0 #1
[    9.232483] Hardware name: AMD Overdrive/Supercharger/To be filled by O.E.M., BIOS ROD1002C 04/08/2016
[    9.241776] Workqueue: efi_rts_wq efi_call_rts
[    9.246211] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[    9.253163] pc : efi_call_virt_check_flags+0x40/0xa4
[    9.258118] lr : efi_call_rts+0x1c0/0x4a0
[    9.262118] sp : ffff80000c163d30
[    9.265420] x29: ffff80000c163d30 x28: ffff000004010000 x27: ffff80000a367000
[    9.272547] x26: 0000000000000000 x25: ffff80000a781e48 x24: ffff80000c2a3d88
[    9.279674] x23: ffff80000c2a3d40 x22: ffff80000c2a3d4c x21: 00000000000000c0
[    9.286800] x20: ffff800009aa0190 x19: 0000000000000000 x18: 000000000000001c
[    9.293926] x17: 000000003d29a4bd x16: ffff80000a88c000 x15: 0000000000000003
[    9.301052] x14: 0000000000000118 x13: 0000000000000000 x12: 0000000000000004
[    9.308178] x11: 0000000000000000 x10: 0000000000000118 x9 : ffff80000a88bb78
[    9.315304] x8 : ffff0003fd2cae80 x7 : 0000000000000000 x6 : 0000000000000000
[    9.322430] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 00000083ffe25248
[    9.329556] x2 : 0000000000000001 x1 : ffff800009aa0190 x0 : 00000000000000c0
[    9.336682] Call trace:
[    9.339116]  efi_call_virt_check_flags+0x40/0xa4
[    9.343724]  efi_call_rts+0x1c0/0x4a0
[    9.347377]  process_one_work+0x1d4/0x320
[    9.351379]  worker_thread+0x6c/0x438
[    9.355031]  kthread+0x118/0x11c
[    9.358248]  ret_from_fork+0x10/0x20
[    9.361814] ---[ end trace 0000000000000000 ]---

    9.371717] efi: [Firmware Bug]: IRQ flags corrupted (0x00000000=>0x000000c0) by EFI set_variable
[    9.380606] ------------[ cut here ]------------
[    9.385212] WARNING: CPU: 7 PID: 128 at drivers/firmware/efi/runtime-wrappers.c:341 virt_efi_set_variable+0x194/0x1a4
[    9.391187] systemd[1]: Created slice system-getty.slice.
[    9.395814] Modules linked in: ip_tables x_tables ipv6
[    9.395822] CPU: 7 PID: 128 Comm: kworker/7:1 Tainted: G        W I        6.3.0 #1
[    9.395827] Hardware name: AMD Overdrive/Supercharger/To be filled by O.E.M., BIOS ROD1002C 04/08/2016
[    9.395830] Workqueue: events refresh_nv_rng_seed
[    9.423272] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[    9.423277] pc : virt_efi_set_variable+0x194/0x1a4
[[0;32m  OK  [0m] Created slice[    9.439692] lr : virt_efi_set_variable+0x178/0x1a4
 [0;1;39msystem-getty.slice[0m[    9.447337] sp : ffff80000c2a3cf0
.
[    9.453415] x29: ffff80000c2a3cf0 x28: 0000000000000000 x27: ffff80000a367000
[    9.460794] x26: 0000000000000000 x25: ffff80000a802e68 x24: ffff80000a802000
[    9.461248] systemd[1]: Created slice system-modprobe.slice.
[    9.467920] x23: ffff800009a9e458 x22: ffff80000c2a3d78 x21: 8000000000000015
[    9.467926] x20: ffff80000a6cc140 x19: ffff80000a802df0 x18: 0000000000000014
[    9.480696] x17: 00000000fac1626a x16: 00000000aed5a9c4 x15: 00000000aaaef9db
[    9.480702] x14: 00000000000001b8 x13: 0000000000000000 x12: 00000000000001b8
[[0;32m  OK  [0m] Created slice[    9.502065] x11: 0000000000000007 x10: 0000000000000a20 x9 : ffff80000c2a3b60
 [0;1;39msystem-modprobe.slice[[    9.512053] x8 : ffff000005641900 x7 : ffff0003fd2cae00 x6 : ffff8003f35b9000
0m.
[    9.522036] x5 : 00000000410fd070 x4 : 0000000000000000 x3 : ffff80000a802e50
[    9.529589] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 8000000000000015
[    9.536715] Call trace:
[    9.539149]  virt_efi_set_variable+0x194/0x1a4
[    9.543583]  refresh_nv_rng_seed+0x78/0xac
[    9.547669]  process_one_work+0x1d4/0x320
[    9.551670]  worker_thread+0x6c/0x438
[    9.555322]  kthread+0x118/0x11c
[    9.558539]  ret_from_fork+0x10/0x20
[    9.562104] ---[ end trace 0000000000000000 ]---

Thanks,
Mark
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20230427/ef9ce74c/attachment.sig>