[RFC PATCH v6 22/92] kvm: x86: provide all page tracking hooks with the guest virtual address
From: Adalbert Lazăr <hidden>
Date: 2019-08-09 16:02:00
Also in:
kvm, linux-mm
Subsystem:
drm drivers, intel drm i915 driver (meteor lake, dg2 and older excluding poulsbo, moorestown and derivative), intel gvt-g drivers (intel gpu virtualization), kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
David Airlie, Simona Vetter, Jani Nikula, Joonas Lahtinen, Rodrigo Vivi, Tvrtko Ursulin, Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Mihai Donțu <redacted> This is needed because the emulator calls the page tracking code irrespective of the current VMEXIT reason or available information. Signed-off-by: Mihai Donțu <redacted> Signed-off-by: Adalbert Lazăr <redacted> --- arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/include/asm/kvm_page_track.h | 9 +++++---- arch/x86/kvm/mmu.c | 2 +- arch/x86/kvm/page_track.c | 6 +++--- arch/x86/kvm/x86.c | 16 ++++++++-------- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- 6 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 67ed934ca124..2d6bde6fa59f 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h@@ -1263,7 +1263,7 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); bool pdptrs_changed(struct kvm_vcpu *vcpu); -int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, +int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, const void *val, int bytes); struct kvm_irq_mask_notifier {
diff --git a/arch/x86/include/asm/kvm_page_track.h b/arch/x86/include/asm/kvm_page_track.h
index 18a94d180485..0492a85f3a44 100644
--- a/arch/x86/include/asm/kvm_page_track.h
+++ b/arch/x86/include/asm/kvm_page_track.h@@ -32,8 +32,9 @@ struct kvm_page_track_notifier_node { * @bytes: the written length. * @node: this node */ - void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, - int bytes, struct kvm_page_track_notifier_node *node); + void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, + const u8 *new, int bytes, + struct kvm_page_track_notifier_node *node); void (*track_create_slot)(struct kvm *kvm, struct kvm_memory_slot *slot, unsigned long npages, struct kvm_page_track_notifier_node *node);
@@ -72,7 +73,7 @@ kvm_page_track_register_notifier(struct kvm *kvm, void kvm_page_track_unregister_notifier(struct kvm *kvm, struct kvm_page_track_notifier_node *n); -void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, - int bytes); +void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, + const u8 *new, int bytes); void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot); #endif
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f2d1d230d5b8..9898d863b6b6 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c@@ -5222,7 +5222,7 @@ static u64 *get_written_sptes(struct kvm_mmu_page *sp, gpa_t gpa, int *nspte) return spte; } -static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, +static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, const u8 *new, int bytes, struct kvm_page_track_notifier_node *node) {
diff --git a/arch/x86/kvm/page_track.c b/arch/x86/kvm/page_track.c
index db5b906876bb..ff7defb4a1d2 100644
--- a/arch/x86/kvm/page_track.c
+++ b/arch/x86/kvm/page_track.c@@ -236,8 +236,8 @@ EXPORT_SYMBOL_GPL(kvm_page_track_unregister_notifier); * The node should figure out if the written page is the one that node is * interested in by itself. */ -void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, - int bytes) +void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, + const u8 *new, int bytes) { struct kvm_page_track_notifier_head *head; struct kvm_page_track_notifier_node *n;
@@ -251,7 +251,7 @@ void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, idx = srcu_read_lock(&head->track_srcu); hlist_for_each_entry_rcu(n, &head->track_notifier_list, node) if (n->track_write) - n->track_write(vcpu, gpa, new, bytes, n); + n->track_write(vcpu, gpa, gva, new, bytes, n); srcu_read_unlock(&head->track_srcu, idx); }
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f66db9473ea3..d3d159986243 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c@@ -5281,7 +5281,7 @@ static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write); } -int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, +int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, const void *val, int bytes) { int ret;
@@ -5289,14 +5289,14 @@ int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); if (ret < 0) return 0; - kvm_page_track_write(vcpu, gpa, val, bytes); + kvm_page_track_write(vcpu, gpa, gva, val, bytes); return 1; } struct read_write_emulator_ops { int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, int bytes); - int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, + int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, void *val, int bytes); int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val);
@@ -5317,16 +5317,16 @@ static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) return 0; } -static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, +static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, void *val, int bytes) { return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); } -static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, +static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, void *val, int bytes) { - return emulator_write_phys(vcpu, gpa, val, bytes); + return emulator_write_phys(vcpu, gpa, gva, val, bytes); } static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val)
@@ -5395,7 +5395,7 @@ static int emulator_read_write_onepage(unsigned long addr, void *val, return X86EMUL_PROPAGATE_FAULT; } - if (!ret && ops->read_write_emulate(vcpu, gpa, val, bytes)) + if (!ret && ops->read_write_emulate(vcpu, gpa, addr, val, bytes)) return X86EMUL_CONTINUE; /*
@@ -5556,7 +5556,7 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, return X86EMUL_CMPXCHG_FAILED; kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); - kvm_page_track_write(vcpu, gpa, new, bytes); + kvm_page_track_write(vcpu, gpa, addr, new, bytes); return X86EMUL_CONTINUE;
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index dd3dfd00f4e6..4bd2cdf79f86 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c@@ -1550,7 +1550,7 @@ static int kvmgt_page_track_remove(unsigned long handle, u64 gfn) return 0; } -static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, +static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, gva_t gva, const u8 *val, int len, struct kvm_page_track_notifier_node *node) {
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