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Re: [PATCH] hw/intc: cannot clear GICv3 ITS CTLR[Enabled] bit
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From: |
Alex Bennée |
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Subject: |
Re: [PATCH] hw/intc: cannot clear GICv3 ITS CTLR[Enabled] bit |
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Date: |
Thu, 25 Nov 2021 15:18:45 +0000 |
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User-agent: |
mu4e 1.7.5; emacs 28.0.60 |
Shashi Mallela <shashi.mallela@linaro.org> writes:
> When Enabled bit is cleared in GITS_CTLR,ITS feature continues
> to be enabled.This patch fixes the issue.
>
> Signed-off-by: Shashi Mallela <shashi.mallela@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
in so far as it doesn't break the kvm-unit-tests but it also doesn't
solve the:
irq 55: nobody cared (try booting with the "irqpoll" option)
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.15.1-ajb #67
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace+0x0/0x1ac
show_stack+0x18/0x24
dump_stack_lvl+0x68/0x84
dump_stack+0x18/0x34
__report_bad_irq+0x4c/0x168
note_interrupt+0x278/0x420
handle_irq_event+0x84/0x1a0
handle_fasteoi_irq+0x148/0x214
handle_domain_irq+0x60/0x90
gic_handle_irq+0xb0/0x120
call_on_irq_stack+0x2c/0x5c
do_interrupt_handler+0x40/0x58
el1_interrupt+0x30/0x50
el1h_64_irq_handler+0x18/0x24
el1h_64_irq+0x78/0x7c
finish_task_switch.isra.0+0x174/0x290
__schedule+0x5e0/0x674
__cond_resched+0x24/0x50
run_ksoftirqd+0x44/0x5c
smpboot_thread_fn+0x154/0x180
kthread+0x118/0x130
ret_from_fork+0x10/0x20
handlers:
[<0000000050cdc74a>] vring_interrupt
Disabling IRQ #55
that is being seen on newer kernels.
--
Alex Bennée