On Fri, Apr 20, 2018 at 03:54:07PM +0100, Punit Agrawal wrote: > Introduce helpers to abstract architectural handling of the conversion > of pfn to page table entries and marking a PMD page table entry as a > block entry. > > The helpers are introduced in preparation for supporting PUD hugepages > at stage 2 - which are supported on arm64 but do not exist on arm. > > Signed-off-by: Punit Agrawal <[email protected]> > Cc: Christoffer Dall <[email protected]> > Cc: Marc Zyngier <[email protected]> > Cc: Russell King <[email protected]> > Cc: Catalin Marinas <[email protected]> > Cc: Will Deacon <[email protected]>
Acked-by: Christoffer Dall <[email protected]> > --- > arch/arm/include/asm/kvm_mmu.h | 5 +++++ > arch/arm64/include/asm/kvm_mmu.h | 5 +++++ > virt/kvm/arm/mmu.c | 7 ++++--- > 3 files changed, 14 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h > index 707a1f06dc5d..5907a81ad5c1 100644 > --- a/arch/arm/include/asm/kvm_mmu.h > +++ b/arch/arm/include/asm/kvm_mmu.h > @@ -75,6 +75,11 @@ phys_addr_t kvm_get_idmap_vector(void); > int kvm_mmu_init(void); > void kvm_clear_hyp_idmap(void); > > +#define kvm_pfn_pte(pfn, prot) pfn_pte(pfn, prot) > +#define kvm_pfn_pmd(pfn, prot) pfn_pmd(pfn, prot) > + > +#define kvm_pmd_mkhuge(pmd) pmd_mkhuge(pmd) > + > static inline void kvm_set_pmd(pmd_t *pmd, pmd_t new_pmd) > { > *pmd = new_pmd; > diff --git a/arch/arm64/include/asm/kvm_mmu.h > b/arch/arm64/include/asm/kvm_mmu.h > index 082110993647..d962508ce4b3 100644 > --- a/arch/arm64/include/asm/kvm_mmu.h > +++ b/arch/arm64/include/asm/kvm_mmu.h > @@ -173,6 +173,11 @@ void kvm_clear_hyp_idmap(void); > #define kvm_set_pte(ptep, pte) set_pte(ptep, pte) > #define kvm_set_pmd(pmdp, pmd) set_pmd(pmdp, pmd) > > +#define kvm_pfn_pte(pfn, prot) pfn_pte(pfn, prot) > +#define kvm_pfn_pmd(pfn, prot) pfn_pmd(pfn, prot) > + > +#define kvm_pmd_mkhuge(pmd) pmd_mkhuge(pmd) > + > static inline pte_t kvm_s2pte_mkwrite(pte_t pte) > { > pte_val(pte) |= PTE_S2_RDWR; > diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c > index db382c7c7cd7..f72ae7a6dea0 100644 > --- a/virt/kvm/arm/mmu.c > +++ b/virt/kvm/arm/mmu.c > @@ -1538,8 +1538,9 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, > phys_addr_t fault_ipa, > invalidate_icache_guest_page(pfn, vma_pagesize); > > if (hugetlb) { > - pmd_t new_pmd = pfn_pmd(pfn, mem_type); > - new_pmd = pmd_mkhuge(new_pmd); > + pmd_t new_pmd = kvm_pfn_pmd(pfn, mem_type); > + > + new_pmd = kvm_pmd_mkhuge(new_pmd); > if (writable) > new_pmd = kvm_s2pmd_mkwrite(new_pmd); > > @@ -1553,7 +1554,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, > phys_addr_t fault_ipa, > > ret = stage2_set_pmd_huge(kvm, memcache, fault_ipa, &new_pmd); > } else { > - pte_t new_pte = pfn_pte(pfn, mem_type); > + pte_t new_pte = kvm_pfn_pte(pfn, mem_type); > > if (writable) { > new_pte = kvm_s2pte_mkwrite(new_pte); > -- > 2.17.0 >
