x86/xen: Get rid of last XEN_LAZY_MMU uses

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There are only very few use cases of XEN_LAZY_MMU left. Get rid of
them in order to avoid having to call enter_lazy(XEN_LAZY_MMU) and
leave_lazy(XEN_LAZY_MMU).

The query in xen_batched_set_pte() can be replaced by using
is_lazy_mmu_mode_active() instead.

As xen_flush_lazy_mmu() will be called only with lazy MMU mode being
active, the test for the lazy mode can just be dropped.

In xen_start_context_switch() and xen_end_context_switch() use
__task_lazy_mmu_mode_pause() and __task_lazy_mmu_mode_resume(),
allowing to drop xen_enter_lazy_mmu() and xen_leave_lazy_mmu()
completely.

Call arch_flush_lazy_mmu_mode() from arch_leave_lazy_mmu_mode(), as
this is the only required action now.

Drop the lazy mmu enter and leave paravirt hooks, leaving the flush
hook as the only needed one.

Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20260526150514.129330-5-jgross@suse.com>

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This commit is contained in:

Juergen Gross 2026-05-26 17:05:13 +02:00

parent 811f0d8caa

commit bec6f41a6f

5 changed files with 11 additions and 50 deletions

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13

arch/x86/include/asm/paravirt.h

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11

arch/x86/include/asm/paravirt_types.h

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6

arch/x86/kernel/paravirt.c

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7

arch/x86/xen/enlighten_pv.c

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28

arch/x86/xen/mmu_pv.c

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