diff options
| author | Paul Mackerras <paulus@ozlabs.org> | 2018-10-08 16:31:10 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-09 16:04:27 +1100 |
| commit | 690ed4cad87a34781a7f3c34a6cebda6cc2cc06c (patch) | |
| tree | d745c47da3014ea5566ca3b33ec782a6b8c81432 /arch/powerpc/include | |
| parent | e3b6b4661527e821ffbe3db83952fdb1e6e47c49 (diff) | |
KVM: PPC: Book3S HV: Use hypercalls for TLB invalidation when nested
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>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index c2a9146ee016..719b31723567 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -24,6 +24,7 @@ #include <asm/bitops.h> #include <asm/book3s/64/mmu-hash.h> #include <asm/cpu_has_feature.h> +#include <asm/ppc-opcode.h> #ifdef CONFIG_PPC_PSERIES static inline bool kvmhv_on_pseries(void) @@ -117,6 +118,10 @@ struct kvm_nested_guest *kvmhv_get_nested(struct kvm *kvm, int l1_lpid, bool create); void kvmhv_put_nested(struct kvm_nested_guest *gp); +/* Encoding of first parameter for H_TLB_INVALIDATE */ +#define H_TLBIE_P1_ENC(ric, prs, r) (___PPC_RIC(ric) | ___PPC_PRS(prs) | \ + ___PPC_R(r)) + /* Power architecture requires HPT is at least 256kiB, at most 64TiB */ #define PPC_MIN_HPT_ORDER 18 #define PPC_MAX_HPT_ORDER 46 |