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SubjectRe: Early boot regression from f0551af0213 ("x86/topology: Ignore non-present APIC IDs in a present package")
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On Mon, 2024-05-13 at 16:08 +0200, Thomas Gleixner wrote:
> On Wed, May 08 2024 at 19:21, Lyude Paul wrote:
> > Regarding the test results - I tried possible_cpus all the way up to 17
> > and nothing got the machine to boot. However, possible_cpus=8
> > intremap=off did get the machine to boot successfully
>
> Oh. That's interesting.
>
> Does v6.9 (released yesterday) boot with just 'intremap=off' too?

Yes - it still boots. As well I finally got the serial console adapter in, but
I don't see any additional output:

[ 0.146896] printk: legacy console [tty0] enabled
[ 0.147433] printk: legacy console [ttyS0] enabled
[ 1.951453] ACPI: Core revision 20230628
[ 1.955466] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133484873504 ns
[ 1.964698] APIC: Switch to symmetric I/O mode setup
[ 1.970973] AMD-Vi: Using global IVHD EFR:0xf77ef22294ada, EFR2:0x0
[ 1.978491] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 1.996945] Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC
[ 2.005376] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.9.0Lyude-Test+ #7
[ 2.012248] Hardware name: MSI MS-7A39/A320M GAMING PRO (MS-7A39), BIOS 1.I0 01/22/2019
[ 2.020160] Call Trace:
[ 2.022584] <TASK>
[ 2.024666] dump_stack_lvl+0x5d/0x80
[ 2.028499] panic+0x118/0x2c8
[ 2.031522] ? timer_irq_works+0x54/0xf0
[ 2.035408] panic_if_irq_remap.cold+0x5/0x9
[ 2.039631] setup_IO_APIC+0x398/0x860
[ 2.043475] ? _raw_spin_unlock_irqrestore+0x1d/0x40
[ 2.048393] ? clear_IO_APIC_pin+0x125/0x1e0
[ 2.052617] apic_intr_mode_init+0xcc/0xe0
[ 2.056672] x86_late_time_init+0x24/0x40
[ 2.060820] start_kernel+0x8be/0x960
[ 2.064446] x86_64_start_reservations+0x24/0x30
[ 2.069015] x86_64_start_kernel+0x95/0xa0
[ 2.073069] common_startup_64+0x13e/0x141
[ 2.077280] </TASK>
[ 2.079447] ---[ end Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC ]---


>
> Thanks,
>
> tglx
>

--
Cheers,
Lyude Paul (she/her)
Software Engineer at Red Hat


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