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Re: [PATCH] x86/setup: delay setting SYS_STATE_smp_boot
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Mon, 16 May 2022 16:35:51 +0200
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Mon, 16 May 2022 14:36:10 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, May 16, 2022 at 01:12:03PM +0200, Roger Pau Monne wrote:
> Booting with Shadow Stacks leads to the following assert on a debug
> hypervisor:
>
> (XEN) [ 11.625166] Assertion 'local_irq_is_enabled()' failed at
> arch/x86/smp.c:265
> (XEN) [ 11.629410] ----[ Xen-4.17.0-10.24-d x86_64 debug=y Not tainted
> ]----
> (XEN) [ 11.633679] CPU: 0
> (XEN) [ 11.637834] RIP: e008:[<ffff82d040345300>]
> flush_area_mask+0x40/0x13e
> [...]
> (XEN) [ 11.806158] Xen call trace:
> (XEN) [ 11.811255] [<ffff82d040345300>] R flush_area_mask+0x40/0x13e
> (XEN) [ 11.816459] [<ffff82d040338a40>] F modify_xen_mappings+0xc5/0x958
> (XEN) [ 11.821689] [<ffff82d0404474f9>] F
> arch/x86/alternative.c#_alternative_instructions+0xb7/0xb9
> (XEN) [ 11.827053] [<ffff82d0404476cc>] F alternative_branches+0xf/0x12
> (XEN) [ 11.832416] [<ffff82d04044e37d>] F __start_xen+0x1ef4/0x2776
> (XEN) [ 11.837809] [<ffff82d040203344>] F __high_start+0x94/0xa0
>
> Fix this by switching to state SYS_STATE_smp_boot after alternatives
> have been applied.
Consider this patch superseded by:
https://lore.kernel.org/xen-devel/20220516143116.28602-1-roger.pau@xxxxxxxxxx
Thanks, Roger.
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