Messages in this thread | | | Date | Sat, 11 Mar 2023 00:19:49 +0800 | Subject | Re: [RFC PATCH V3 00/16] x86/hyperv/sev: Add AMD sev-snp enlightened guest support on hyperv | From | Tianyu Lan <> |
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On 3/10/2023 11:35 PM, Gupta, Pankaj wrote: > > > Hi Tianyu, > > While testing the guest patches on KVM host, My guest kernel is stuck > at early bootup. As it did not seem a hang but sort of loop where > interrupts are getting processed from "pv_native_irq_enable" path > repeatedly and prevent boot process to make progress IIUC. Did you face > any such scenario in your testing? > > It seems to me "native_irq_enable" enable interrupts and > "check_hv_pending_irq_enable" starts handling the interrupts (after > disabling irqs). But "check_hv_pending_irq_enable=>do_exc_hv" can again > call "pv_native_irq_enable" in interrupt handling path and execute the > same loop?
I don't meet the issue. Thanks for report. I will double check and report back.
> Also pasting below the stack dump [1]. > > Thanks, > Pankaj > > [1] > [ 20.530786] Call Trace:^M > [ 20.531099] <IRQ>^M > [ 20.531360] dump_stack_lvl+0x4d/0x67^M > [ 20.531820] dump_stack+0x14/0x1a^M > [ 20.532235] do_exc_hv.cold+0x11/0xec^M > [ 20.532792] check_hv_pending_irq_enable+0x64/0x80^M > [ 20.533390] pv_native_irq_enable+0xe/0x20^M ====> here > [ 20.533902] __do_softirq+0x89/0x2f3^M > [ 20.534352] __irq_exit_rcu+0x9f/0x110^M > [ 20.534825] irq_exit_rcu+0x12/0x20^M > [ 20.535267] common_interrupt+0xca/0xf0^M > [ 20.535745] </IRQ>^M > [ 20.536014] <TASK>^M > [ 20.536286] do_exc_hv.cold+0xda/0xec^M > [ 20.536826] check_hv_pending_irq_enable+0x64/0x80^M > [ 20.537429] pv_native_irq_enable+0xe/0x20^M ====> here > [ 20.537942] _raw_spin_unlock_irqrestore+0x21/0x50^M > [ 20.538539] __setup_irq+0x3be/0x740^M > [ 20.538990] request_threaded_irq+0x116/0x180^M > [ 20.539533] hpet_time_init+0x35/0x56^M > [ 20.539994] x86_late_time_init+0x1f/0x3d^M > [ 20.540556] start_kernel+0x8af/0x970^M > [ 20.541033] x86_64_start_reservations+0x28/0x2e^M > [ 20.541607] x86_64_start_kernel+0x96/0xa0^M > [ 20.542126] secondary_startup_64_no_verify+0xe5/0xeb^M > [ 20.542757] </TASK>^M
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