diff options
| -rw-r--r-- | arch/s390/kvm/vsie.c | 50 | ||||
| -rw-r--r-- | include/linux/kvm_host.h | 1 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 4 |
3 files changed, 21 insertions, 34 deletions
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index b18b5652e5c5..a311938b63b3 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -443,22 +443,14 @@ static int map_prefix(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) * * Returns: - 0 on success * - -EINVAL if the gpa is not valid guest storage - * - -ENOMEM if out of memory */ static int pin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t *hpa) { struct page *page; - hva_t hva; - int rc; - hva = gfn_to_hva(kvm, gpa_to_gfn(gpa)); - if (kvm_is_error_hva(hva)) + page = gfn_to_page(kvm, gpa_to_gfn(gpa)); + if (is_error_page(page)) return -EINVAL; - rc = get_user_pages_fast(hva, 1, 1, &page); - if (rc < 0) - return rc; - else if (rc != 1) - return -ENOMEM; *hpa = (hpa_t) page_to_virt(page) + (gpa & ~PAGE_MASK); return 0; } @@ -466,11 +458,7 @@ static int pin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t *hpa) /* Unpins a page previously pinned via pin_guest_page, marking it as dirty. */ static void unpin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t hpa) { - struct page *page; - - page = virt_to_page(hpa); - set_page_dirty_lock(page); - put_page(page); + kvm_release_pfn_dirty(hpa >> PAGE_SHIFT); /* mark the page always as dirty for migration */ mark_page_dirty(kvm, gpa_to_gfn(gpa)); } @@ -557,7 +545,7 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) rc = set_validity_icpt(scb_s, 0x003bU); if (!rc) { rc = pin_guest_page(vcpu->kvm, gpa, &hpa); - if (rc == -EINVAL) + if (rc) rc = set_validity_icpt(scb_s, 0x0034U); } if (rc) @@ -574,10 +562,10 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) } /* 256 bytes cannot cross page boundaries */ rc = pin_guest_page(vcpu->kvm, gpa, &hpa); - if (rc == -EINVAL) + if (rc) { rc = set_validity_icpt(scb_s, 0x0080U); - if (rc) goto unpin; + } scb_s->itdba = hpa; } @@ -592,10 +580,10 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) * if this block gets bigger, we have to shadow it. */ rc = pin_guest_page(vcpu->kvm, gpa, &hpa); - if (rc == -EINVAL) + if (rc) { rc = set_validity_icpt(scb_s, 0x1310U); - if (rc) goto unpin; + } scb_s->gvrd = hpa; } @@ -607,11 +595,11 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) } /* 64 bytes cannot cross page boundaries */ rc = pin_guest_page(vcpu->kvm, gpa, &hpa); - if (rc == -EINVAL) + if (rc) { rc = set_validity_icpt(scb_s, 0x0043U); - /* Validity 0x0044 will be checked by SIE */ - if (rc) goto unpin; + } + /* Validity 0x0044 will be checked by SIE */ scb_s->riccbd = hpa; } if ((scb_s->ecb & ECB_GS) && !(scb_s->ecd & ECD_HOSTREGMGMT)) { @@ -635,10 +623,10 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) * cross page boundaries */ rc = pin_guest_page(vcpu->kvm, gpa, &hpa); - if (rc == -EINVAL) + if (rc) { rc = set_validity_icpt(scb_s, 0x10b0U); - if (rc) goto unpin; + } scb_s->sdnxo = hpa | sdnxc; } return 0; @@ -663,7 +651,6 @@ static void unpin_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, * * Returns: - 0 if the scb was pinned. * - > 0 if control has to be given to guest 2 - * - -ENOMEM if out of memory */ static int pin_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, gpa_t gpa) @@ -672,14 +659,13 @@ static int pin_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, int rc; rc = pin_guest_page(vcpu->kvm, gpa, &hpa); - if (rc == -EINVAL) { + if (rc) { rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); - if (!rc) - rc = 1; + WARN_ON_ONCE(rc); + return 1; } - if (!rc) - vsie_page->scb_o = (struct kvm_s390_sie_block *) hpa; - return rc; + vsie_page->scb_o = (struct kvm_s390_sie_block *) hpa; + return 0; } /* diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 6882538eda32..2e754b7c282c 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -667,6 +667,7 @@ kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool *writable); void kvm_release_pfn_clean(kvm_pfn_t pfn); +void kvm_release_pfn_dirty(kvm_pfn_t pfn); void kvm_set_pfn_dirty(kvm_pfn_t pfn); void kvm_set_pfn_accessed(kvm_pfn_t pfn); void kvm_get_pfn(kvm_pfn_t pfn); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 9deb5a245b83..37731f661be5 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -122,7 +122,6 @@ static void hardware_disable_all(void); static void kvm_io_bus_destroy(struct kvm_io_bus *bus); -static void kvm_release_pfn_dirty(kvm_pfn_t pfn); static void mark_page_dirty_in_slot(struct kvm_memory_slot *memslot, gfn_t gfn); __visible bool kvm_rebooting; @@ -1679,11 +1678,12 @@ void kvm_release_page_dirty(struct page *page) } EXPORT_SYMBOL_GPL(kvm_release_page_dirty); -static void kvm_release_pfn_dirty(kvm_pfn_t pfn) +void kvm_release_pfn_dirty(kvm_pfn_t pfn) { kvm_set_pfn_dirty(pfn); kvm_release_pfn_clean(pfn); } +EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); void kvm_set_pfn_dirty(kvm_pfn_t pfn) { |