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Re: [PATCH] libacpi: Remove CPU hotplug and GPE handling from PVH DSDTs
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 10 Sep 2025 17:02:05 +0200
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- Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>, Grygorii Strashko <grygorii_strashko@xxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 10 Sep 2025 15:02:16 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 10.09.2025 16:49, Alejandro Vallejo wrote:
> CPU hotplug relies on the guest having access to the legacy online CPU
> bitmap that QEMU provides at PIO 0xAF00. But PVH guests have no DM, so
> this causes the MADT to get corrupted due to spurious modifications of
> the "online" flag in MADT entries and the table checksum during the
> initial acpica passes.
I don't understand this MADT corruption aspect, which - aiui - is why
there's a Fixes: tag here. The code change itself looks plausible.
Jan
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