KVM: PPC: Book3S HV: Use hypercalls for TLB invalidation when nested

Browse source

This adds code to call the H_TLB_INVALIDATE hypercall when running as
a guest, in the cases where we need to invalidate TLBs (or other MMU
caches) as part of managing the mappings for a nested guest.  Calling
H_TLB_INVALIDATE lets the nested hypervisor inform the parent
hypervisor about changes to partition-scoped page tables or the
partition table without needing to do hypervisor-privileged tlbie
instructions.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

...

This commit is contained in:

Paul Mackerras 2018-10-08 16:31:10 +11:00 • committed by Michael Ellerman

parent e3b6b46615

commit 690ed4cad8

3 changed files with 57 additions and 8 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

arch/powerpc/include/asm/kvm_book3s_64.h

View file

30

arch/powerpc/kvm/book3s_64_mmu_radix.c

View file

30

arch/powerpc/kvm/book3s_hv_nested.c

View file