diff options
| author | Oliver Upton <oliver.upton@linux.dev> | 2022-11-08 01:00:33 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-11-10 17:43:47 +0300 |
| commit | 1577cb5823cefdff4416f272a88143ee933d97f5 (patch) | |
| tree | 632abd3cbc68471a272dba04a3d6c391f916b3d8 /arch/arm64/include/asm/kvm_pgtable.h | |
| parent | af87fc03cfdf6893011df419588d27acdfb9c197 (diff) | |
| download | linux-1577cb5823cefdff4416f272a88143ee933d97f5.tar.xz | |
KVM: arm64: Handle stage-2 faults in parallel
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
Diffstat (limited to 'arch/arm64/include/asm/kvm_pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_pgtable.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h index 7634b6964779..a874ce0ce7b5 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -412,6 +412,7 @@ void kvm_pgtable_stage2_free_removed(struct kvm_pgtable_mm_ops *mm_ops, void *pg * @prot: Permissions and attributes for the mapping. * @mc: Cache of pre-allocated and zeroed memory from which to allocate * page-table pages. + * @flags: Flags to control the page-table walk (ex. a shared walk) * * The offset of @addr within a page is ignored, @size is rounded-up to * the next page boundary and @phys is rounded-down to the previous page @@ -433,7 +434,7 @@ void kvm_pgtable_stage2_free_removed(struct kvm_pgtable_mm_ops *mm_ops, void *pg */ int kvm_pgtable_stage2_map(struct kvm_pgtable *pgt, u64 addr, u64 size, u64 phys, enum kvm_pgtable_prot prot, - void *mc); + void *mc, enum kvm_pgtable_walk_flags flags); /** * kvm_pgtable_stage2_set_owner() - Unmap and annotate pages in the IPA space to |