KVM: arm64: Handle stage-2 faults in parallel

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The stage-2 map walker has been made parallel-aware, and as such can be
called while only holding the read side of the MMU lock. Rip out the
conditional locking in user_mem_abort() and instead grab the read lock.
Continue to take the write lock from other callsites to
kvm_pgtable_stage2_map().

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221107220033.1895655-1-oliver.upton@linux.dev

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Oliver Upton 2022-11-07 22:00:33 +00:00 • committed by Marc Zyngier

parent af87fc03cf

commit 1577cb5823

4 changed files with 13 additions and 28 deletions

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3

arch/arm64/include/asm/kvm_pgtable.h

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2

arch/arm64/kvm/hyp/nvhe/mem_protect.c

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5

arch/arm64/kvm/hyp/pgtable.c

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31

arch/arm64/kvm/mmu.c

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