cleanup swiotlb initialization
Boris Ostrovsky
boris.ostrovsky at oracle.com
Thu Feb 24 08:18:33 PST 2022
On 2/24/22 10:58 AM, Christoph Hellwig wrote:
> Thanks.
>
> This looks really strange as early_amd_iommu_init should not interact much
> with the changes. I'll see if I can find a AMD system to test on.
Just to be clear: this crashes only as dom0. Boots fine as baremetal.
-boris
>
> On Wed, Feb 23, 2022 at 07:57:49PM -0500, Boris Ostrovsky wrote:
>> [ 37.377313] BUG: unable to handle page fault for address: ffffc90042880018
>> [ 37.378219] #PF: supervisor read access in kernel mode
>> [ 37.378219] #PF: error_code(0x0000) - not-present page
>> [ 37.378219] PGD 7c2f2ee067 P4D 7c2f2ee067 PUD 7bf019b067 PMD 105a30067 PTE 0
>> [ 37.378219] Oops: 0000 [#1] PREEMPT SMP NOPTI
>> [ 37.378219] CPU: 14 PID: 1 Comm: swapper/0 Not tainted 5.17.0-rc5swiotlb #9
>> [ 37.378219] Hardware name: Oracle Corporation ORACLE SERVER E1-2c/ASY,Generic,SM,E1-2c, BIOS 49004900 12/23/2020
>> [ 37.378219] RIP: e030:init_iommu_one+0x248/0x2f0
>> [ 37.378219] Code: 48 89 43 68 48 85 c0 74 c4 be 00 20 00 00 48 89 df e8 ea ee ff ff 48 89 43 78 48 85 c0 74 ae c6 83 98 00 00 00 00 48 8b 43 38 <48> 8b 40 18 a8 01 74 07 83 8b a8 04 00 00 01 f6 83 a8 04 00 00 01
>> [ 37.378219] RSP: e02b:ffffc9004044bd18 EFLAGS: 00010286
>> [ 37.378219] RAX: ffffc90042880000 RBX: ffff888107260800 RCX: 0000000000000000
>> [ 37.378219] RDX: 0000000080000000 RSI: ffffea00041cab80 RDI: 00000000ffffffff
>> [ 37.378219] RBP: ffffc9004044bd38 R08: 0000000000000901 R09: ffffea00041cab00
>> [ 37.378219] R10: 0000000000000002 R11: 0000000000000000 R12: ffffc90040435008
>> [ 37.378219] R13: 0000000000080000 R14: 00000000efa00000 R15: 0000000000000000
>> [ 37.378219] FS: 0000000000000000(0000) GS:ffff88fef4180000(0000) knlGS:0000000000000000
>> [ 37.378219] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [ 37.378219] CR2: ffffc90042880018 CR3: 000000000260a000 CR4: 0000000000050660
>> [ 37.378219] Call Trace:
>> [ 37.378219] <TASK>
>> [ 37.378219] early_amd_iommu_init+0x3c5/0x72d
>> [ 37.378219] ? iommu_setup+0x284/0x284
>> [ 37.378219] state_next+0x158/0x68f
>> [ 37.378219] ? iommu_setup+0x284/0x284
>> [ 37.378219] iommu_go_to_state+0x28/0x2d
>> [ 37.378219] amd_iommu_init+0x15/0x4b
>> [ 37.378219] ? iommu_setup+0x284/0x284
>> [ 37.378219] pci_iommu_init+0x12/0x37
>> [ 37.378219] do_one_initcall+0x48/0x210
>> [ 37.378219] kernel_init_freeable+0x229/0x28c
>> [ 37.378219] ? rest_init+0xe0/0xe0
>> [ 37.963966] kernel_init+0x1a/0x130
>> [ 37.979415] ret_from_fork+0x22/0x30
>> [ 37.991436] </TASK>
>> [ 37.999465] Modules linked in:
>> [ 38.007413] CR2: ffffc90042880018
>> [ 38.019416] ---[ end trace 0000000000000000 ]---
>> [ 38.023418] RIP: e030:init_iommu_one+0x248/0x2f0
>> [ 38.023418] Code: 48 89 43 68 48 85 c0 74 c4 be 00 20 00 00 48 89 df e8 ea ee ff ff 48 89 43 78 48 85 c0 74 ae c6 83 98 00 00 00 00 48 8b 43 38 <48> 8b 40 18 a8 01 74 07 83 8b a8 04 00 00 01 f6 83 a8 04 00 00 01
>> [ 38.023418] RSP: e02b:ffffc9004044bd18 EFLAGS: 00010286
>> [ 38.023418] RAX: ffffc90042880000 RBX: ffff888107260800 RCX: 0000000000000000
>> [ 38.155413] RDX: 0000000080000000 RSI: ffffea00041cab80 RDI: 00000000ffffffff
>> [ 38.175965] Freeing initrd memory: 62640K
>> [ 38.155413] RBP: ffffc9004044bd38 R08: 0000000000000901 R09: ffffea00041cab00
>> [ 38.155413] R10: 0000000000000002 R11: 0000000000000000 R12: ffffc90040435008
>> [ 38.155413] R13: 0000000000080000 R14: 00000000efa00000 R15: 0000000000000000
>> [ 38.155413] FS: 0000000000000000(0000) GS:ffff88fef4180000(0000) knlGS:0000000000000000
>> [ 38.287414] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [ 38.309557] CR2: ffffc90042880018 CR3: 000000000260a000 CR4: 0000000000050660
>> [ 38.332403] Kernel panic - not syncing: Fatal exception
>> [ 38.351414] Rebooting in 20 seconds..
>>
>>
>>
>> -boris
> ---end quoted text---
>
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