diff options
| author | Will Deacon <will@kernel.org> | 2020-09-11 14:25:15 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-11 15:51:13 +0100 |
| commit | 02bbd374ce4a8aad36c022fd1203cb9f11b52ee3 (patch) | |
| tree | b6c6770a36ecca82c89c3931ddde19e3efdaa29c /arch/arm64/kvm/mmu.c | |
| parent | 6d9d2115c48027132a69477c98d812be669f5b9b (diff) | |
| download | linux-02bbd374ce4a8aad36c022fd1203cb9f11b52ee3.tar.bz2 | |
KVM: arm64: Convert kvm_phys_addr_ioremap() to generic page-table API
Convert kvm_phys_addr_ioremap() to use kvm_pgtable_stage2_map() instead
of stage2_set_pte().
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20200911132529.19844-8-will@kernel.org
Diffstat (limited to 'arch/arm64/kvm/mmu.c')
| -rw-r--r-- | arch/arm64/kvm/mmu.c | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 4607e9ca60a2..32e93f42aed0 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1154,35 +1154,33 @@ static int stage2_pudp_test_and_clear_young(pud_t *pud) int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, phys_addr_t pa, unsigned long size, bool writable) { - phys_addr_t addr, end; + phys_addr_t addr; int ret = 0; - unsigned long pfn; struct kvm_mmu_memory_cache cache = { 0, __GFP_ZERO, NULL, }; + struct kvm_pgtable *pgt = kvm->arch.mmu.pgt; + enum kvm_pgtable_prot prot = KVM_PGTABLE_PROT_DEVICE | + KVM_PGTABLE_PROT_R | + (writable ? KVM_PGTABLE_PROT_W : 0); - end = (guest_ipa + size + PAGE_SIZE - 1) & PAGE_MASK; - pfn = __phys_to_pfn(pa); - - for (addr = guest_ipa; addr < end; addr += PAGE_SIZE) { - pte_t pte = kvm_pfn_pte(pfn, PAGE_S2_DEVICE); - - if (writable) - pte = kvm_s2pte_mkwrite(pte); + size += offset_in_page(guest_ipa); + guest_ipa &= PAGE_MASK; + for (addr = guest_ipa; addr < guest_ipa + size; addr += PAGE_SIZE) { ret = kvm_mmu_topup_memory_cache(&cache, kvm_mmu_cache_min_pages(kvm)); if (ret) - goto out; + break; + spin_lock(&kvm->mmu_lock); - ret = stage2_set_pte(&kvm->arch.mmu, &cache, addr, &pte, - KVM_S2PTE_FLAG_IS_IOMAP); + ret = kvm_pgtable_stage2_map(pgt, addr, PAGE_SIZE, pa, prot, + &cache); spin_unlock(&kvm->mmu_lock); if (ret) - goto out; + break; - pfn++; + pa += PAGE_SIZE; } -out: kvm_mmu_free_memory_cache(&cache); return ret; } |