Paolo Bonzini f3b65bbaed KVM: delete .change_pte MMU notifier callback ... The .change_pte() MMU notifier callback was intended as an optimization. The original point of it was that KSM could tell KVM to flip its secondary PTE to a new location without having to first zap it. At the time there was also an .invalidate_page() callback; both of them were *not* bracketed by calls to mmu_notifier_invalidate_range_{start,end}(), and .invalidate_page() also doubled as a fallback implementation of .change_pte(). Later on, however, both callbacks were changed to occur within an invalidate_range_start/end() block. In the case of .change_pte(), commit 6bdb913f0a ("mm: wrap calls to set_pte_at_notify with invalidate_range_start and invalidate_range_end", 2012-10-09) did so to remove the fallback from .invalidate_page() to .change_pte() and allow sleepable .invalidate_page() hooks. This however made KVM's usage of the .change_pte() callback completely moot, because KVM unmaps the sPTEs during .invalidate_range_start() and therefore .change_pte() has no hope of finding a sPTE to change. Drop the generic KVM code that dispatches to kvm_set_spte_gfn(), as well as all the architecture specific implementations. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Anup Patel <anup@brainfault.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Bibo Mao <maobibo@loongson.cn> Message-ID: <20240405115815.3226315-2-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2024-04-11 13:18:27 -04:00
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Kconfig	Merge branch 'kvm-kconfig'	2024-02-08 08:47:51 -05:00
Makefile	…
emulate.c	MIPS: Fix typos	2024-01-08 10:39:12 +01:00
entry.c	MIPS: kvm/entry: Use GPR number macros	2024-02-20 12:41:52 +01:00
fpu.S	…
hypcall.c	…
interrupt.c	…
interrupt.h	…
loongson_ipi.c	…
mips.c	…
mmu.c	KVM: delete .change_pte MMU notifier callback	2024-04-11 13:18:27 -04:00
msa.S	…
stats.c	…
tlb.c	…
trace.h	…
vz.c	…