target/linux/layerscape/patches-5.4/811-kvm-0002-arm-arm64-KVM-allow-specifying-s2-prot-bits-when-map.patch

   1 From 7a291e75b7793f1fbd0ad9ad39ae35a2b091d84b Mon Sep 17 00:00:00 2001
   2 From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
   3 Date: Tue, 26 Jul 2016 16:12:30 +0300
   4 Subject: [PATCH] arm/arm64 KVM: allow specifying s2 prot bits when mapping i/o
   5
   6 Add parameter allowing to specify s2 page table
   7 protection and type bits and update the callers
   8 accordingly.
   9 The parameter will be used in a forthcoming patch.
  10
  11 Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
  12 ---
  13  arch/arm/include/asm/kvm_mmu.h   | 3 ++-
  14  arch/arm64/include/asm/kvm_mmu.h | 3 ++-
  15  virt/kvm/arm/mmu.c               | 8 +++++---
  16  virt/kvm/arm/vgic/vgic-v2.c      | 3 ++-
  17  4 files changed, 11 insertions(+), 6 deletions(-)
  18
  19 --- a/arch/arm/include/asm/kvm_mmu.h
  20 +++ b/arch/arm/include/asm/kvm_mmu.h
  21 @@ -55,7 +55,8 @@ void stage2_unmap_vm(struct kvm *kvm);
  22  int kvm_alloc_stage2_pgd(struct kvm *kvm);
  23  void kvm_free_stage2_pgd(struct kvm *kvm);
  24  int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
  25 -                         phys_addr_t pa, unsigned long size, bool writable);
  26 +                         phys_addr_t pa, unsigned long size, bool writable,
  27 +                         pgprot_t prot);
  28
  29  int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run);
  30
  31 --- a/arch/arm64/include/asm/kvm_mmu.h
  32 +++ b/arch/arm64/include/asm/kvm_mmu.h
  33 @@ -156,7 +156,8 @@ void stage2_unmap_vm(struct kvm *kvm);
  34  int kvm_alloc_stage2_pgd(struct kvm *kvm);
  35  void kvm_free_stage2_pgd(struct kvm *kvm);
  36  int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
  37 -                         phys_addr_t pa, unsigned long size, bool writable);
  38 +                         phys_addr_t pa, unsigned long size, bool writable,
  39 +                         pgprot_t prot);
  40
  41  int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run);
  42
  43 --- a/virt/kvm/arm/mmu.c
  44 +++ b/virt/kvm/arm/mmu.c
  45 @@ -1335,9 +1335,11 @@ static int stage2_pudp_test_and_clear_yo
  46   * @guest_ipa: The IPA at which to insert the mapping
  47   * @pa:                The physical address of the device
  48   * @size:      The size of the mapping
  49 + * @prot:      S2 page translation bits
  50   */
  51  int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
  52 -                         phys_addr_t pa, unsigned long size, bool writable)
  53 +                         phys_addr_t pa, unsigned long size, bool writable,
  54 +                         pgprot_t prot)
  55  {
  56         phys_addr_t addr, end;
  57         int ret = 0;
  58 @@ -1348,7 +1350,7 @@ int kvm_phys_addr_ioremap(struct kvm *kv
  59         pfn = __phys_to_pfn(pa);
  60
  61         for (addr = guest_ipa; addr < end; addr += PAGE_SIZE) {
  62 -               pte_t pte = kvm_pfn_pte(pfn, PAGE_S2_DEVICE);
  63 +               pte_t pte = kvm_pfn_pte(pfn, prot);
  64
  65                 if (writable)
  66                         pte = kvm_s2pte_mkwrite(pte);
  67 @@ -2346,7 +2348,7 @@ int kvm_arch_prepare_memory_region(struc
  68
  69                         ret = kvm_phys_addr_ioremap(kvm, gpa, pa,
  70                                                     vm_end - vm_start,
  71 -                                                   writable);
  72 +                                                   writable, PAGE_S2_DEVICE);
  73                         if (ret)
  74                                 break;
  75                 }
  76 --- a/virt/kvm/arm/vgic/vgic-v2.c
  77 +++ b/virt/kvm/arm/vgic/vgic-v2.c
  78 @@ -341,7 +341,8 @@ int vgic_v2_map_resources(struct kvm *kv
  79         if (!static_branch_unlikely(&vgic_v2_cpuif_trap)) {
  80                 ret = kvm_phys_addr_ioremap(kvm, dist->vgic_cpu_base,
  81                                             kvm_vgic_global_state.vcpu_base,
  82 -                                           KVM_VGIC_V2_CPU_SIZE, true);
  83 +                                           KVM_VGIC_V2_CPU_SIZE, true,
  84 +                                           PAGE_S2_DEVICE);
  85                 if (ret) {
  86                         kvm_err("Unable to remap VGIC CPU to VCPU\n");
  87                         goto out;