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Message-ID: <20200910182901.GK8357@zn.tnic>
Date: Thu, 10 Sep 2020 20:29:19 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: x86-ml <x86@...nel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] x86/mce: Make mce_rdmsrl() do a plain RDMSR only
Ok, with all those changes, I don't think the following nice and juicy
message can be overlooked:
[ 32.267830] mce: MSR access error: RDMSR from 0x1234 at rIP: 0xffffffff8102ed62 (mce_rdmsrl+0x12/0x50)
[ 32.267838] Call Trace:
[ 32.267838] <#MC>
[ 32.267838] do_machine_check+0xbd/0x9f0
[ 32.267839] ? trigger_mce+0x7/0x10
[ 32.267839] exc_machine_check+0x77/0xd0
[ 32.267840] asm_exc_machine_check+0x19/0x30
[ 32.267840] RIP: 0010:trigger_mce+0x7/0x10
[ 32.267841] Code: c0 c3 90 0f 1f 44 00 00 48 8b 47 58 48 89 06 31 c0 c3 90 0f 1f 44 00 00 8b 47 44 48 89 06 31 c0 c3 66 90 0f 1f 44 00 00 cd 12 <c3> 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 cd f4 c3 0f 1f 84 00 00
[ 32.267841] RSP: 0018:ffffc90000003fc0 EFLAGS: 00000002
[ 32.267842] RAX: ffffffff81032940 RBX: 0000000000000000 RCX: ffff88807dce9e80
[ 32.267843] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 32.267843] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 32.267844] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 32.267844] R13: ffff88807dce9e80 R14: 0000000000000000 R15: 0000000000000000
[ 32.267845] ? inj_extcpu_get+0x10/0x10
[ 32.267845] </#MC>
[ 32.267845] <IRQ>
[ 32.267846] flush_smp_call_function_queue+0xce/0x1b0
[ 32.267846] __sysvec_call_function_single+0x2c/0xd0
[ 32.267846] asm_call_on_stack+0x12/0x20
[ 32.267847] </IRQ>
[ 32.267847] sysvec_call_function_single+0x6e/0x80
[ 32.267847] asm_sysvec_call_function_single+0x12/0x20
[ 32.267848] RIP: 0010:default_idle+0x13/0x20
[ 32.267849] Code: 0f ae 38 0f ae f0 eb b9 fb eb e3 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 e9 07 00 00 00 0f 00 2d c1 9c 5e 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 0f 1f 44 00 00 65 8b 15 04
[ 32.267849] RSP: 0018:ffffffff82203ec0 EFLAGS: 00000212
[ 32.267850] RAX: ffffffff81819730 RBX: 0000000000000000 RCX: 0000000000029d00
[ 32.267851] RDX: 000000000007de7e RSI: 7ffffff880b4b40b RDI: ffffffff8220f880
[ 32.267851] RBP: ffffffff8220f880 R08: 0000000473333333 R09: 00000049ae089af4
[ 32.267852] R10: 000000000006fecd R11: 0000000000006f96 R12: ffffffff8220f880
[ 32.267852] R13: ffffffff8220f880 R14: 0000000000000000 R15: 0000000000000000
[ 32.267852] ? mwait_idle+0x80/0x80
[ 32.267853] default_idle_call+0x34/0xf0
[ 32.267853] do_idle+0x1ba/0x210
[ 32.267853] cpu_startup_entry+0x19/0x20
[ 32.267854] start_kernel+0x4f5/0x502
[ 32.267854] secondary_startup_64+0xa4/0xb0
[ 32.267855] Kernel panic - not syncing: MCA architectural violation!
[ 32.267855] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc4+ #4
[ 32.267856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1 04/01/2014
[ 32.267856] Call Trace:
[ 32.267856] <#MC>
[ 32.267856] dump_stack+0x57/0x6a
[ 32.267857] panic+0xf2/0x2c2
[ 32.267857] ? secondary_startup_64+0xa3/0xb0
[ 32.267857] ex_handler_rdmsr_fault+0x36/0x36
[ 32.267858] fixup_exception+0x56/0x80
[ 32.267858] exc_general_protection+0xb6/0x2d0
[ 32.267858] asm_exc_general_protection+0x1e/0x30
[ 32.267859] RIP: 0010:mce_rdmsrl+0x12/0x50
[ 32.267860] Code: 54 b9 15 82 48 c7 c1 20 e4 02 81 48 c7 c2 00 e4 02 81 e9 01 17 20 00 90 0f 1f 44 00 00 65 8a 05 07 81 fe 7e 84 c0 75 10 89 f9 <0f> 32 48 89 d7 48 c1 e7 20 48 09 f8 f3 c3 e8 7b f5 ff ff 48 63 d0
[ 32.267860] RSP: 0018:fffffe000000fe30 EFLAGS: 00010046
[ 32.267861] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000001234
[ 32.267861] RDX: 0000001d39aa4ebc RSI: fffffe000000ff08 RDI: 0000000000001234
[ 32.267862] RBP: fffffe000000fe88 R08: 0000000000000000 R09: 0000000000000000
[ 32.267862] R10: 0000000000000000 R11: 0000000000000000 R12: fffffe000000ff58
[ 32.267863] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 32.267863] do_machine_check+0xbd/0x9f0
[ 32.267864] ? trigger_mce+0x7/0x10
[ 32.267864] exc_machine_check+0x77/0xd0
[ 32.267864] asm_exc_machine_check+0x19/0x30
[ 32.267865] RIP: 0010:trigger_mce+0x7/0x10
[ 32.267866] Code: c0 c3 90 0f 1f 44 00 00 48 8b 47 58 48 89 06 31 c0 c3 90 0f 1f 44 00 00 8b 47 44 48 89 06 31 c0 c3 66 90 0f 1f 44 00 00 cd 12 <c3> 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 cd f4 c3 0f 1f 84 00 00
[ 32.267866] RSP: 0018:ffffc90000003fc0 EFLAGS: 00000002
[ 32.267867] RAX: ffffffff81032940 RBX: 0000000000000000 RCX: ffff88807dce9e80
[ 32.267867] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 32.267868] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 32.267868] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 32.267869] R13: ffff88807dce9e80 R14: 0000000000000000 R15: 0000000000000000
[ 32.267869] ? inj_extcpu_get+0x10/0x10
[ 32.267869] </#MC>
[ 32.267870] <IRQ>
[ 32.267870] flush_smp_call_function_queue+0xce/0x1b0
[ 32.267870] __sysvec_call_function_single+0x2c/0xd0
[ 32.267871] asm_call_on_stack+0x12/0x20
[ 32.267871] </IRQ>
[ 32.267871] sysvec_call_function_single+0x6e/0x80
[ 32.267872] asm_sysvec_call_function_single+0x12/0x20
[ 32.267872] RIP: 0010:default_idle+0x13/0x20
[ 32.267873] Code: 0f ae 38 0f ae f0 eb b9 fb eb e3 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 e9 07 00 00 00 0f 00 2d c1 9c 5e 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 0f 1f 44 00 00 65 8b 15 04
[ 32.267874] RSP: 0018:ffffffff82203ec0 EFLAGS: 00000212
[ 32.267874] RAX: ffffffff81819730 RBX: 0000000000000000 RCX: 0000000000029d00
[ 32.267875] RDX: 000000000007de7e RSI: 7ffffff880b4b40b RDI: ffffffff8220f880
[ 32.267875] RBP: ffffffff8220f880 R08: 0000000473333333 R09: 00000049ae089af4
[ 32.267876] R10: 000000000006fecd R11: 0000000000006f96 R12: ffffffff8220f880
[ 32.267876] R13: ffffffff8220f880 R14: 0000000000000000 R15: 0000000000000000
[ 32.267877] ? mwait_idle+0x80/0x80
[ 32.267877] default_idle_call+0x34/0xf0
[ 32.267877] do_idle+0x1ba/0x210
[ 32.267878] cpu_startup_entry+0x19/0x20
[ 32.267878] start_kernel+0x4f5/0x502
[ 32.267878] secondary_startup_64+0xa4/0xb0
[ 32.268204] Kernel Offset: disabled
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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