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-rw-r--r--sevstep/kvm.c205
1 files changed, 0 insertions, 205 deletions
diff --git a/sevstep/kvm.c b/sevstep/kvm.c
deleted file mode 100644
index b6b0d49..0000000
--- a/sevstep/kvm.c
+++ /dev/null
@@ -1,205 +0,0 @@
-#include "kvm.h"
-
-#include <linux/types.h>
-
-bool
-__untrack_single_page(struct kvm_vcpu *vcpu, gfn_t gfn,
- enum kvm_page_track_mode mode)
-{
- int idx;
- bool ret;
- struct kvm_memory_slot *slot;
-
- ret = false;
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- if (mode == KVM_PAGE_TRACK_ACCESS) {
- //printk("Removing gfn: %016llx from acess page track pool\n", gfn);
- }
- if (mode == KVM_PAGE_TRACK_WRITE) {
- //printk("Removing gfn: %016llx from write page track pool\n", gfn);
- }
- slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn);
-
- if (slot != NULL && kvm_slot_page_track_is_active(vcpu->kvm, slot, gfn, mode)) {
- write_lock(&vcpu->kvm->mmu_lock);
- kvm_slot_page_track_remove_page(vcpu->kvm, slot, gfn, mode);
- write_unlock(&vcpu->kvm->mmu_lock);
- ret = true;
- } else {
- printk("Failed to untrack %016llx because ", gfn);
- if (slot == NULL) {
- printk(KERN_CONT "slot was null");
- } else if (!kvm_slot_page_track_is_active(vcpu->kvm, slot, gfn, mode)) {
- printk(KERN_CONT "page track was not active");
- }
- printk(KERN_CONT "\n");
- }
- srcu_read_unlock(&vcpu->kvm->srcu, idx);
- return ret;
-}
-EXPORT_SYMBOL(__untrack_single_page);
-
-bool
-__reset_accessed_on_page(struct kvm_vcpu *vcpu, gfn_t gfn)
-{
- int idx;
- bool ret;
- struct kvm_memory_slot *slot;
-
- ret = false;
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn);
- if( slot != NULL ) {
- write_lock(&vcpu->kvm->mmu_lock);
- //Vincent: The kvm mmu function now requires min_level
- //We want all pages to protected so we do PG_LEVEL_4K
- //https://patchwork.kernel.org/project/kvm/patch/20210416082511.2856-2-zhukeqian1@huawei.com/
- sevstep_kvm_mmu_slot_gfn_protect(vcpu->kvm,slot,gfn,PG_LEVEL_4K,KVM_PAGE_TRACK_RESET_ACCESSED);
- write_unlock(&vcpu->kvm->mmu_lock);
- ret = true;
- }
- srcu_read_unlock(&vcpu->kvm->srcu, idx);
- return ret;
-}
-EXPORT_SYMBOL(__reset_accessed_on_page);
-
-bool
-__clear_nx_on_page(struct kvm_vcpu *vcpu, gfn_t gfn)
-{
- int idx;
- bool ret;
- struct kvm_memory_slot *slot;
-
- ret = false;
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn);
- if( slot != NULL ) {
- write_lock(&vcpu->kvm->mmu_lock);
- //Vincent: The kvm mmu function now requires min_level
- //We want all pages to protected so we do PG_LEVEL_4K
- //https://patchwork.kernel.org/project/kvm/patch/20210416082511.2856-2-zhukeqian1@huawei.com/
- sevstep_kvm_mmu_slot_gfn_protect(vcpu->kvm, slot, gfn,
- PG_LEVEL_4K, KVM_PAGE_TRACK_RESET_EXEC);
- write_unlock(&vcpu->kvm->mmu_lock);
- ret = true;
- }
- srcu_read_unlock(&vcpu->kvm->srcu, idx);
- return ret;
-}
-EXPORT_SYMBOL(__clear_nx_on_page);
-
-bool
-__track_single_page(struct kvm_vcpu *vcpu, gfn_t gfn,
- enum kvm_page_track_mode mode)
-{
- int idx;
- bool ret;
- struct kvm_memory_slot *slot;
-
- ret = false;
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- if (mode == KVM_PAGE_TRACK_ACCESS) {
- //printk_ratelimited("Adding gfn: %016llx to acess page track pool\n", gfn);
- //printk("Adding gfn: %016llx to acess page track pool\n", gfn);
- }
- if (mode == KVM_PAGE_TRACK_WRITE) {
- //printk_ratelimited("Adding gfn: %016llx to write page track pool\n", gfn);
- }
- slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn);
- if (slot != NULL && !kvm_slot_page_track_is_active(vcpu->kvm,slot, gfn, mode)) {
-
- write_lock(&vcpu->kvm->mmu_lock);
- kvm_slot_page_track_add_page(vcpu->kvm, slot, gfn, mode);
- write_unlock(&vcpu->kvm->mmu_lock);
- ret = true;
-
- } else {
-
- printk("Failed to track %016llx because ", gfn);
- if (slot == NULL) {
- printk(KERN_CONT "slot was null");
- }
- if (kvm_slot_page_track_is_active(vcpu->kvm, slot, gfn, mode)) {
- printk(KERN_CONT "page is already tracked");
- }
- printk(KERN_CONT "\n");
- }
- srcu_read_unlock(&vcpu->kvm->srcu, idx);
- return ret;
-}
-EXPORT_SYMBOL(__track_single_page);
-
-long
-kvm_start_tracking(struct kvm_vcpu *vcpu,enum kvm_page_track_mode mode )
-{
- long count = 0;
- u64 iterator, iterat_max;
- struct kvm_memory_slot *slot;
- int idx;
-
- //Vincent: Memslots interface changed into a rb tree, see
- //here: https://lwn.net/Articles/856392/
- //and here: https://lore.kernel.org/all/cover.1632171478.git.maciej.szmigiero@oracle.com/T/#u
- //Thus we use instead of
- //iterat_max = vcpu->kvm->memslots[0]->memslots[0].base_gfn
- // + vcpu->kvm->memslots[0]->memslots[0].npages;
- struct rb_node *node;
- struct kvm_memory_slot *first_memslot;
- node = rb_last(&(vcpu->kvm->memslots[0]->gfn_tree));
- first_memslot = container_of(node, struct kvm_memory_slot, gfn_node[0]);
- iterat_max = first_memslot->base_gfn + first_memslot->npages;
- for (iterator=0; iterator < iterat_max; iterator++)
- {
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- slot = kvm_vcpu_gfn_to_memslot(vcpu, iterator);
- if ( slot != NULL && !kvm_slot_page_track_is_active(vcpu->kvm, slot, iterator, mode)) {
- write_lock(&vcpu->kvm->mmu_lock);
- kvm_slot_page_track_add_page(vcpu->kvm, slot, iterator, mode);
- write_unlock(&vcpu->kvm->mmu_lock);
- count++;
- }
- srcu_read_unlock(&vcpu->kvm->srcu, idx);
- }
-
- return count;
-}
-EXPORT_SYMBOL(kvm_start_tracking);
-
-long
-kvm_stop_tracking(struct kvm_vcpu *vcpu,enum kvm_page_track_mode mode)
-{
- long count = 0;
- u64 iterator, iterat_max;
- struct kvm_memory_slot *slot;
- int idx;
-
-
- //Vincent: Memslots interface changed into a rb tree, see
- //here: https://lwn.net/Articles/856392/
- //and here: https://lore.kernel.org/all/cover.1632171478.git.maciej.szmigiero@oracle.com/T/#u
- //Thus we use instead of
- //iterat_max = vcpu->kvm->memslots[0]->memslots[0].base_gfn
- // + vcpu->kvm->memslots[0]->memslots[0].npages;
- struct rb_node *node;
- struct kvm_memory_slot *first_memslot;
- node = rb_last(&(vcpu->kvm->memslots[0]->gfn_tree));
- first_memslot = container_of(node, struct kvm_memory_slot, gfn_node[0]);
- iterat_max = first_memslot->base_gfn + first_memslot->npages;
- for (iterator=0; iterator < iterat_max; iterator++)
- {
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- slot = kvm_vcpu_gfn_to_memslot(vcpu, iterator);
- //Vincent: I think see here https://patchwork.kernel.org/project/kvm/patch/20210924163152.289027-22-pbonzini@redhat.com/
- if ( slot != NULL && kvm_slot_page_track_is_active(vcpu->kvm, slot, iterator, mode)) {
- write_lock(&vcpu->kvm->mmu_lock);
- kvm_slot_page_track_remove_page(vcpu->kvm, slot, iterator, mode);
- write_unlock(&vcpu->kvm->mmu_lock);
- count++;
- }
- srcu_read_unlock(&vcpu->kvm->srcu, idx);
- }
-
- return count;
-}
-EXPORT_SYMBOL(kvm_stop_tracking);
-
generated by cgit v1.2.3-71-gd317 (git 2.46.0) at 2025-12-05 15:23:10 +0000