From 4b99412ed6972cc77c1f16009e1d00323fcef9ab Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Tue, 5 May 2020 12:47:16 +0530 Subject: 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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200505071729.54912-10-aneesh.kumar@linux.ibm.com --- arch/powerpc/include/asm/kvm_book3s_64.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/powerpc/include/asm/kvm_book3s_64.h') 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 #include #include +#include #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__ */ -- cgit v1.2.3