diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-05-05 12:47:16 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-05 21:20:15 +1000 |
| commit | 4b99412ed6972cc77c1f16009e1d00323fcef9ab (patch) | |
| tree | ba1fc3ffba8334161a03c5dec9c414937d7e199e /arch/powerpc/include/asm/kvm_book3s_64.h | |
| parent | 87013f9c602cfbbc0734fb2f703df9fc884d05d9 (diff) | |
| download | linux-4b99412ed6972cc77c1f16009e1d00323fcef9ab.tar.bz2 | |
powerpc/kvm/book3s: Add helper to walk partition scoped linux page table.
The locking rules for walking partition scoped table is different from process
scoped table. Hence add a helper for secondary linux page table walk and also
add check whether we are holding the right locks.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200505071729.54912-10-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/kvm_book3s_64.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 04b2b927bb5a..2c2635967d6e 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -14,6 +14,7 @@ #include <asm/book3s/64/mmu-hash.h> #include <asm/cpu_has_feature.h> #include <asm/ppc-opcode.h> +#include <asm/pte-walk.h> #ifdef CONFIG_PPC_PSERIES static inline bool kvmhv_on_pseries(void) @@ -634,6 +635,18 @@ extern void kvmhv_remove_nest_rmap_range(struct kvm *kvm, unsigned long gpa, unsigned long hpa, unsigned long nbytes); +static inline pte_t *find_kvm_secondary_pte(struct kvm *kvm, unsigned long ea, + unsigned *hshift) +{ + pte_t *pte; + + VM_WARN(!spin_is_locked(&kvm->mmu_lock), + "%s called with kvm mmu_lock not held \n", __func__); + pte = __find_linux_pte(kvm->arch.pgtable, ea, NULL, hshift); + + return pte; +} + #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ #endif /* __ASM_KVM_BOOK3S_64_H__ */ |