linux-kernel - Re: [EXTERNAL] [tip: x86/apic] x86/io_apic: Cleanup trigger/polarity helpers

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Message-ID: <3aec44983d0ca0b57bb03dfa677a2a695f1e707b.camel@infradead.org>
Date:   Wed, 18 Nov 2020 10:52:32 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>
Cc:     linux-kernel@...r.kernel.org, x86 <x86@...nel.org>,
        Qian Cai <cai@...hat.com>, Joerg Roedel <joro@...tes.org>
Subject: Re: [EXTERNAL] [tip: x86/apic] x86/io_apic: Cleanup
 trigger/polarity helpers

On Wed, 2020-11-18 at 17:29 +0700, Suravee Suthikulpanit wrote:
> I might need your help debugging this issue. I'm seeing the following error:
> 
> [   14.005937] irq 29, desc: 00000000d200500b, depth: 0, count: 0, unhandled: 0
> [   14.006234] ->handle_irq():  00000000eab4b6eb, handle_bad_irq+0x0/0x230

Where's that line coming from?

> [   14.006234] ->irq_data.chip(): 000000001cce6d6b, intcapxt_controller+0x0/0x120
> [   14.006234] ->action(): 0000000083bfd734
> [   14.006234] ->action->handler(): 0000000094806345, amd_iommu_int_handler+0x0/0x10
> [   14.006234] unexpected IRQ trap at vector 1d
> 
> Do you have any idea what might have gone wrong here?

Hm, vector 0x1d is vector 29. It's also IRQ 29. I wonder if that's a coincidence.

Can you make intcapxt_irqdomain_activate() print the 64-bit value that
it's writing to the intcapxt registers?

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