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Diffstat (limited to 'arch/arm64/kvm/mmu.c')
-rw-r--r--arch/arm64/kvm/mmu.c49
1 files changed, 25 insertions, 24 deletions
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index d87c8fcc4c24..d14504821b79 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -223,12 +223,12 @@ static void stage2_free_unlinked_table_rcu_cb(struct rcu_head *head)
{
struct page *page = container_of(head, struct page, rcu_head);
void *pgtable = page_to_virt(page);
- u32 level = page_private(page);
+ s8 level = page_private(page);
kvm_pgtable_stage2_free_unlinked(&kvm_s2_mm_ops, pgtable, level);
}
-static void stage2_free_unlinked_table(void *addr, u32 level)
+static void stage2_free_unlinked_table(void *addr, s8 level)
{
struct page *page = virt_to_page(addr);
@@ -804,13 +804,13 @@ static int get_user_mapping_size(struct kvm *kvm, u64 addr)
struct kvm_pgtable pgt = {
.pgd = (kvm_pteref_t)kvm->mm->pgd,
.ia_bits = vabits_actual,
- .start_level = (KVM_PGTABLE_MAX_LEVELS -
- CONFIG_PGTABLE_LEVELS),
+ .start_level = (KVM_PGTABLE_LAST_LEVEL -
+ CONFIG_PGTABLE_LEVELS + 1),
.mm_ops = &kvm_user_mm_ops,
};
unsigned long flags;
kvm_pte_t pte = 0; /* Keep GCC quiet... */
- u32 level = ~0;
+ s8 level = S8_MAX;
int ret;
/*
@@ -829,7 +829,9 @@ static int get_user_mapping_size(struct kvm *kvm, u64 addr)
* Not seeing an error, but not updating level? Something went
* deeply wrong...
*/
- if (WARN_ON(level >= KVM_PGTABLE_MAX_LEVELS))
+ if (WARN_ON(level > KVM_PGTABLE_LAST_LEVEL))
+ return -EFAULT;
+ if (WARN_ON(level < KVM_PGTABLE_FIRST_LEVEL))
return -EFAULT;
/* Oops, the userspace PTs are gone... Replay the fault */
@@ -1374,7 +1376,7 @@ static bool kvm_vma_mte_allowed(struct vm_area_struct *vma)
static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
struct kvm_memory_slot *memslot, unsigned long hva,
- unsigned long fault_status)
+ bool fault_is_perm)
{
int ret = 0;
bool write_fault, writable, force_pte = false;
@@ -1388,17 +1390,17 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
gfn_t gfn;
kvm_pfn_t pfn;
bool logging_active = memslot_is_logging(memslot);
- unsigned long fault_level = kvm_vcpu_trap_get_fault_level(vcpu);
long vma_pagesize, fault_granule;
enum kvm_pgtable_prot prot = KVM_PGTABLE_PROT_R;
struct kvm_pgtable *pgt;
- fault_granule = 1UL << ARM64_HW_PGTABLE_LEVEL_SHIFT(fault_level);
+ if (fault_is_perm)
+ fault_granule = kvm_vcpu_trap_get_perm_fault_granule(vcpu);
write_fault = kvm_is_write_fault(vcpu);
exec_fault = kvm_vcpu_trap_is_exec_fault(vcpu);
VM_BUG_ON(write_fault && exec_fault);
- if (fault_status == ESR_ELx_FSC_PERM && !write_fault && !exec_fault) {
+ if (fault_is_perm && !write_fault && !exec_fault) {
kvm_err("Unexpected L2 read permission error\n");
return -EFAULT;
}
@@ -1409,8 +1411,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
* only exception to this is when dirty logging is enabled at runtime
* and a write fault needs to collapse a block entry into a table.
*/
- if (fault_status != ESR_ELx_FSC_PERM ||
- (logging_active && write_fault)) {
+ if (!fault_is_perm || (logging_active && write_fault)) {
ret = kvm_mmu_topup_memory_cache(memcache,
kvm_mmu_cache_min_pages(vcpu->arch.hw_mmu));
if (ret)
@@ -1527,8 +1528,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
* backed by a THP and thus use block mapping if possible.
*/
if (vma_pagesize == PAGE_SIZE && !(force_pte || device)) {
- if (fault_status == ESR_ELx_FSC_PERM &&
- fault_granule > PAGE_SIZE)
+ if (fault_is_perm && fault_granule > PAGE_SIZE)
vma_pagesize = fault_granule;
else
vma_pagesize = transparent_hugepage_adjust(kvm, memslot,
@@ -1541,7 +1541,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
}
}
- if (fault_status != ESR_ELx_FSC_PERM && !device && kvm_has_mte(kvm)) {
+ if (!fault_is_perm && !device && kvm_has_mte(kvm)) {
/* Check the VMM hasn't introduced a new disallowed VMA */
if (mte_allowed) {
sanitise_mte_tags(kvm, pfn, vma_pagesize);
@@ -1567,7 +1567,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
* permissions only if vma_pagesize equals fault_granule. Otherwise,
* kvm_pgtable_stage2_map() should be called to change block size.
*/
- if (fault_status == ESR_ELx_FSC_PERM && vma_pagesize == fault_granule)
+ if (fault_is_perm && vma_pagesize == fault_granule)
ret = kvm_pgtable_stage2_relax_perms(pgt, fault_ipa, prot);
else
ret = kvm_pgtable_stage2_map(pgt, fault_ipa, vma_pagesize,
@@ -1618,7 +1618,7 @@ static void handle_access_fault(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
*/
int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
{
- unsigned long fault_status;
+ unsigned long esr;
phys_addr_t fault_ipa;
struct kvm_memory_slot *memslot;
unsigned long hva;
@@ -1626,12 +1626,12 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
gfn_t gfn;
int ret, idx;
- fault_status = kvm_vcpu_trap_get_fault_type(vcpu);
+ esr = kvm_vcpu_get_esr(vcpu);
fault_ipa = kvm_vcpu_get_fault_ipa(vcpu);
is_iabt = kvm_vcpu_trap_is_iabt(vcpu);
- if (fault_status == ESR_ELx_FSC_FAULT) {
+ if (esr_fsc_is_permission_fault(esr)) {
/* Beyond sanitised PARange (which is the IPA limit) */
if (fault_ipa >= BIT_ULL(get_kvm_ipa_limit())) {
kvm_inject_size_fault(vcpu);
@@ -1666,9 +1666,9 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
kvm_vcpu_get_hfar(vcpu), fault_ipa);
/* Check the stage-2 fault is trans. fault or write fault */
- if (fault_status != ESR_ELx_FSC_FAULT &&
- fault_status != ESR_ELx_FSC_PERM &&
- fault_status != ESR_ELx_FSC_ACCESS) {
+ if (!esr_fsc_is_translation_fault(esr) &&
+ !esr_fsc_is_permission_fault(esr) &&
+ !esr_fsc_is_access_flag_fault(esr)) {
kvm_err("Unsupported FSC: EC=%#x xFSC=%#lx ESR_EL2=%#lx\n",
kvm_vcpu_trap_get_class(vcpu),
(unsigned long)kvm_vcpu_trap_get_fault(vcpu),
@@ -1730,13 +1730,14 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
/* Userspace should not be able to register out-of-bounds IPAs */
VM_BUG_ON(fault_ipa >= kvm_phys_size(vcpu->arch.hw_mmu));
- if (fault_status == ESR_ELx_FSC_ACCESS) {
+ if (esr_fsc_is_access_flag_fault(esr)) {
handle_access_fault(vcpu, fault_ipa);
ret = 1;
goto out_unlock;
}
- ret = user_mem_abort(vcpu, fault_ipa, memslot, hva, fault_status);
+ ret = user_mem_abort(vcpu, fault_ipa, memslot, hva,
+ esr_fsc_is_permission_fault(esr));
if (ret == 0)
ret = 1;
out:
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-26 13:08:43 +0000