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-rw-r--r--Documentation/virt/kvm/api.rst16
-rw-r--r--Documentation/virt/kvm/locking.rst2
-rw-r--r--arch/riscv/kvm/aia_imsic.c8
-rw-r--r--arch/x86/include/asm/reboot.h4
-rw-r--r--arch/x86/kernel/kvm.c4
-rw-r--r--arch/x86/kernel/reboot.c4
-rw-r--r--arch/x86/kvm/Kconfig9
-rw-r--r--arch/x86/kvm/Makefile2
-rw-r--r--arch/x86/kvm/mmu/mmu.c63
-rw-r--r--arch/x86/kvm/svm/nested.c6
-rw-r--r--arch/x86/kvm/vmx/vmx.c6
-rw-r--r--include/linux/kvm_host.h2
-rw-r--r--tools/testing/selftests/kvm/Makefile1
-rw-r--r--tools/testing/selftests/kvm/memslot_modification_stress_test.c2
-rw-r--r--tools/testing/selftests/kvm/memslot_perf_test.c6
-rw-r--r--tools/testing/selftests/kvm/x86_64/cpuid_test.c2
-rw-r--r--virt/kvm/kvm_main.c12
17 files changed, 98 insertions, 51 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index e32471977d0a..edc070c6e19b 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -8098,13 +8098,15 @@ KVM_X86_QUIRK_MWAIT_NEVER_UD_FAULTS By default, KVM emulates MONITOR/MWAIT (if
KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT is
disabled.
-KVM_X86_QUIRK_SLOT_ZAP_ALL By default, KVM invalidates all SPTEs in
- fast way for memslot deletion when VM type
- is KVM_X86_DEFAULT_VM.
- When this quirk is disabled or when VM type
- is other than KVM_X86_DEFAULT_VM, KVM zaps
- only leaf SPTEs that are within the range of
- the memslot being deleted.
+KVM_X86_QUIRK_SLOT_ZAP_ALL By default, for KVM_X86_DEFAULT_VM VMs, KVM
+ invalidates all SPTEs in all memslots and
+ address spaces when a memslot is deleted or
+ moved. When this quirk is disabled (or the
+ VM type isn't KVM_X86_DEFAULT_VM), KVM only
+ ensures the backing memory of the deleted
+ or moved memslot isn't reachable, i.e KVM
+ _may_ invalidate only SPTEs related to the
+ memslot.
=================================== ============================================
7.32 KVM_CAP_MAX_VCPU_ID
diff --git a/Documentation/virt/kvm/locking.rst b/Documentation/virt/kvm/locking.rst
index 20a9a37d1cdd..1bedd56e2fe3 100644
--- a/Documentation/virt/kvm/locking.rst
+++ b/Documentation/virt/kvm/locking.rst
@@ -136,7 +136,7 @@ For direct sp, we can easily avoid it since the spte of direct sp is fixed
to gfn. For indirect sp, we disabled fast page fault for simplicity.
A solution for indirect sp could be to pin the gfn, for example via
-kvm_vcpu_gfn_to_pfn_atomic, before the cmpxchg. After the pinning:
+gfn_to_pfn_memslot_atomic, before the cmpxchg. After the pinning:
- We have held the refcount of pfn; that means the pfn can not be freed and
be reused for another gfn.
diff --git a/arch/riscv/kvm/aia_imsic.c b/arch/riscv/kvm/aia_imsic.c
index 0a1e859323b4..a8085cd8215e 100644
--- a/arch/riscv/kvm/aia_imsic.c
+++ b/arch/riscv/kvm/aia_imsic.c
@@ -55,7 +55,7 @@ struct imsic {
/* IMSIC SW-file */
struct imsic_mrif *swfile;
phys_addr_t swfile_pa;
- spinlock_t swfile_extirq_lock;
+ raw_spinlock_t swfile_extirq_lock;
};
#define imsic_vs_csr_read(__c) \
@@ -622,7 +622,7 @@ static void imsic_swfile_extirq_update(struct kvm_vcpu *vcpu)
* interruptions between reading topei and updating pending status.
*/
- spin_lock_irqsave(&imsic->swfile_extirq_lock, flags);
+ raw_spin_lock_irqsave(&imsic->swfile_extirq_lock, flags);
if (imsic_mrif_atomic_read(mrif, &mrif->eidelivery) &&
imsic_mrif_topei(mrif, imsic->nr_eix, imsic->nr_msis))
@@ -630,7 +630,7 @@ static void imsic_swfile_extirq_update(struct kvm_vcpu *vcpu)
else
kvm_riscv_vcpu_unset_interrupt(vcpu, IRQ_VS_EXT);
- spin_unlock_irqrestore(&imsic->swfile_extirq_lock, flags);
+ raw_spin_unlock_irqrestore(&imsic->swfile_extirq_lock, flags);
}
static void imsic_swfile_read(struct kvm_vcpu *vcpu, bool clear,
@@ -1051,7 +1051,7 @@ int kvm_riscv_vcpu_aia_imsic_init(struct kvm_vcpu *vcpu)
}
imsic->swfile = page_to_virt(swfile_page);
imsic->swfile_pa = page_to_phys(swfile_page);
- spin_lock_init(&imsic->swfile_extirq_lock);
+ raw_spin_lock_init(&imsic->swfile_extirq_lock);
/* Setup IO device */
kvm_iodevice_init(&imsic->iodev, &imsic_iodoev_ops);
diff --git a/arch/x86/include/asm/reboot.h b/arch/x86/include/asm/reboot.h
index c02183d3cdd7..ecd58ea9a837 100644
--- a/arch/x86/include/asm/reboot.h
+++ b/arch/x86/include/asm/reboot.h
@@ -26,7 +26,7 @@ void __noreturn machine_real_restart(unsigned int type);
#define MRR_APM 1
typedef void (cpu_emergency_virt_cb)(void);
-#if IS_ENABLED(CONFIG_KVM_INTEL) || IS_ENABLED(CONFIG_KVM_AMD)
+#if IS_ENABLED(CONFIG_KVM_X86)
void cpu_emergency_register_virt_callback(cpu_emergency_virt_cb *callback);
void cpu_emergency_unregister_virt_callback(cpu_emergency_virt_cb *callback);
void cpu_emergency_disable_virtualization(void);
@@ -34,7 +34,7 @@ void cpu_emergency_disable_virtualization(void);
static inline void cpu_emergency_register_virt_callback(cpu_emergency_virt_cb *callback) {}
static inline void cpu_emergency_unregister_virt_callback(cpu_emergency_virt_cb *callback) {}
static inline void cpu_emergency_disable_virtualization(void) {}
-#endif /* CONFIG_KVM_INTEL || CONFIG_KVM_AMD */
+#endif /* CONFIG_KVM_X86 */
typedef void (*nmi_shootdown_cb)(int, struct pt_regs*);
void nmi_shootdown_cpus(nmi_shootdown_cb callback);
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 263f8aed4e2c..21e9e4845354 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -37,6 +37,7 @@
#include <asm/apic.h>
#include <asm/apicdef.h>
#include <asm/hypervisor.h>
+#include <asm/mtrr.h>
#include <asm/tlb.h>
#include <asm/cpuidle_haltpoll.h>
#include <asm/ptrace.h>
@@ -980,6 +981,9 @@ static void __init kvm_init_platform(void)
}
kvmclock_init();
x86_platform.apic_post_init = kvm_apic_init;
+
+ /* Set WB as the default cache mode for SEV-SNP and TDX */
+ mtrr_overwrite_state(NULL, 0, MTRR_TYPE_WRBACK);
}
#if defined(CONFIG_AMD_MEM_ENCRYPT)
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 0e0a4cf6b5eb..615922838c51 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -530,7 +530,7 @@ static inline void kb_wait(void)
static inline void nmi_shootdown_cpus_on_restart(void);
-#if IS_ENABLED(CONFIG_KVM_INTEL) || IS_ENABLED(CONFIG_KVM_AMD)
+#if IS_ENABLED(CONFIG_KVM_X86)
/* RCU-protected callback to disable virtualization prior to reboot. */
static cpu_emergency_virt_cb __rcu *cpu_emergency_virt_callback;
@@ -600,7 +600,7 @@ static void emergency_reboot_disable_virtualization(void)
}
#else
static void emergency_reboot_disable_virtualization(void) { }
-#endif /* CONFIG_KVM_INTEL || CONFIG_KVM_AMD */
+#endif /* CONFIG_KVM_X86 */
void __attribute__((weak)) mach_reboot_fixups(void)
{
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 730c2f34d347..f09f13c01c6b 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -17,8 +17,8 @@ menuconfig VIRTUALIZATION
if VIRTUALIZATION
-config KVM
- tristate "Kernel-based Virtual Machine (KVM) support"
+config KVM_X86
+ def_tristate KVM if KVM_INTEL || KVM_AMD
depends on X86_LOCAL_APIC
select KVM_COMMON
select KVM_GENERIC_MMU_NOTIFIER
@@ -44,7 +44,11 @@ config KVM
select HAVE_KVM_PM_NOTIFIER if PM
select KVM_GENERIC_HARDWARE_ENABLING
select KVM_GENERIC_PRE_FAULT_MEMORY
+ select KVM_GENERIC_PRIVATE_MEM if KVM_SW_PROTECTED_VM
select KVM_WERROR if WERROR
+
+config KVM
+ tristate "Kernel-based Virtual Machine (KVM) support"
help
Support hosting fully virtualized guest machines using hardware
virtualization extensions. You will need a fairly recent
@@ -77,7 +81,6 @@ config KVM_SW_PROTECTED_VM
bool "Enable support for KVM software-protected VMs"
depends on EXPERT
depends on KVM && X86_64
- select KVM_GENERIC_PRIVATE_MEM
help
Enable support for KVM software-protected VMs. Currently, software-
protected VMs are purely a development and testing vehicle for
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 5494669a055a..f9dddb8cb466 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -32,7 +32,7 @@ kvm-intel-y += vmx/vmx_onhyperv.o vmx/hyperv_evmcs.o
kvm-amd-y += svm/svm_onhyperv.o
endif
-obj-$(CONFIG_KVM) += kvm.o
+obj-$(CONFIG_KVM_X86) += kvm.o
obj-$(CONFIG_KVM_INTEL) += kvm-intel.o
obj-$(CONFIG_KVM_AMD) += kvm-amd.o
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index e52f990548df..8e853a5fc867 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1556,6 +1556,17 @@ bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
{
bool flush = false;
+ /*
+ * To prevent races with vCPUs faulting in a gfn using stale data,
+ * zapping a gfn range must be protected by mmu_invalidate_in_progress
+ * (and mmu_invalidate_seq). The only exception is memslot deletion;
+ * in that case, SRCU synchronization ensures that SPTEs are zapped
+ * after all vCPUs have unlocked SRCU, guaranteeing that vCPUs see the
+ * invalid slot.
+ */
+ lockdep_assert_once(kvm->mmu_invalidate_in_progress ||
+ lockdep_is_held(&kvm->slots_lock));
+
if (kvm_memslots_have_rmaps(kvm))
flush = __kvm_rmap_zap_gfn_range(kvm, range->slot,
range->start, range->end,
@@ -7047,14 +7058,42 @@ void kvm_arch_flush_shadow_all(struct kvm *kvm)
kvm_mmu_zap_all(kvm);
}
-/*
- * Zapping leaf SPTEs with memslot range when a memslot is moved/deleted.
- *
- * Zapping non-leaf SPTEs, a.k.a. not-last SPTEs, isn't required, worst
- * case scenario we'll have unused shadow pages lying around until they
- * are recycled due to age or when the VM is destroyed.
- */
-static void kvm_mmu_zap_memslot_leafs(struct kvm *kvm, struct kvm_memory_slot *slot)
+static void kvm_mmu_zap_memslot_pages_and_flush(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ bool flush)
+{
+ LIST_HEAD(invalid_list);
+ unsigned long i;
+
+ if (list_empty(&kvm->arch.active_mmu_pages))
+ goto out_flush;
+
+ /*
+ * Since accounting information is stored in struct kvm_arch_memory_slot,
+ * all MMU pages that are shadowing guest PTEs must be zapped before the
+ * memslot is deleted, as freeing such pages after the memslot is freed
+ * will result in use-after-free, e.g. in unaccount_shadowed().
+ */
+ for (i = 0; i < slot->npages; i++) {
+ struct kvm_mmu_page *sp;
+ gfn_t gfn = slot->base_gfn + i;
+
+ for_each_gfn_valid_sp_with_gptes(kvm, sp, gfn)
+ kvm_mmu_prepare_zap_page(kvm, sp, &invalid_list);
+
+ if (need_resched() || rwlock_needbreak(&kvm->mmu_lock)) {
+ kvm_mmu_remote_flush_or_zap(kvm, &invalid_list, flush);
+ flush = false;
+ cond_resched_rwlock_write(&kvm->mmu_lock);
+ }
+ }
+
+out_flush:
+ kvm_mmu_remote_flush_or_zap(kvm, &invalid_list, flush);
+}
+
+static void kvm_mmu_zap_memslot(struct kvm *kvm,
+ struct kvm_memory_slot *slot)
{
struct kvm_gfn_range range = {
.slot = slot,
@@ -7062,11 +7101,11 @@ static void kvm_mmu_zap_memslot_leafs(struct kvm *kvm, struct kvm_memory_slot *s
.end = slot->base_gfn + slot->npages,
.may_block = true,
};
+ bool flush;
write_lock(&kvm->mmu_lock);
- if (kvm_unmap_gfn_range(kvm, &range))
- kvm_flush_remote_tlbs_memslot(kvm, slot);
-
+ flush = kvm_unmap_gfn_range(kvm, &range);
+ kvm_mmu_zap_memslot_pages_and_flush(kvm, slot, flush);
write_unlock(&kvm->mmu_lock);
}
@@ -7082,7 +7121,7 @@ void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
if (kvm_memslot_flush_zap_all(kvm))
kvm_mmu_zap_all_fast(kvm);
else
- kvm_mmu_zap_memslot_leafs(kvm, slot);
+ kvm_mmu_zap_memslot(kvm, slot);
}
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index d5314cb7dff4..cf84103ce38b 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -63,8 +63,12 @@ static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
u64 pdpte;
int ret;
+ /*
+ * Note, nCR3 is "assumed" to be 32-byte aligned, i.e. the CPU ignores
+ * nCR3[4:0] when loading PDPTEs from memory.
+ */
ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(cr3), &pdpte,
- offset_in_page(cr3) + index * 8, 8);
+ (cr3 & GENMASK(11, 5)) + index * 8, 8);
if (ret)
return 0;
return pdpte;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 1a4438358c5e..81ed596e4454 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4888,9 +4888,6 @@ void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
vmx->hv_deadline_tsc = -1;
kvm_set_cr8(vcpu, 0);
- vmx_segment_cache_clear(vmx);
- kvm_register_mark_available(vcpu, VCPU_EXREG_SEGMENTS);
-
seg_setup(VCPU_SREG_CS);
vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
vmcs_writel(GUEST_CS_BASE, 0xffff0000ul);
@@ -4917,6 +4914,9 @@ void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
vmcs_writel(GUEST_IDTR_BASE, 0);
vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
+ vmx_segment_cache_clear(vmx);
+ kvm_register_mark_available(vcpu, VCPU_EXREG_SEGMENTS);
+
vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, 0);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index db567d26f7b9..45be36e5285f 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1313,8 +1313,6 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
-kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
-kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map);
void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty);
unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 960cf6a77198..e6b7e01d5708 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -244,6 +244,7 @@ CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
-I$(<D) -Iinclude/$(ARCH_DIR) -I ../rseq -I.. $(EXTRA_CFLAGS) \
+ -march=x86-64-v2 \
$(KHDR_INCLUDES)
ifeq ($(ARCH),s390)
CFLAGS += -march=z10
diff --git a/tools/testing/selftests/kvm/memslot_modification_stress_test.c b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
index e3343f0df9e1..c81a84990eab 100644
--- a/tools/testing/selftests/kvm/memslot_modification_stress_test.c
+++ b/tools/testing/selftests/kvm/memslot_modification_stress_test.c
@@ -169,12 +169,14 @@ int main(int argc, char *argv[])
case 'i':
p.nr_iterations = atoi_positive("Number of iterations", optarg);
break;
+#ifdef __x86_64__
case 'q':
p.disable_slot_zap_quirk = true;
TEST_REQUIRE(kvm_check_cap(KVM_CAP_DISABLE_QUIRKS2) &
KVM_X86_QUIRK_SLOT_ZAP_ALL);
break;
+#endif
case 'h':
default:
help(argv[0]);
diff --git a/tools/testing/selftests/kvm/memslot_perf_test.c b/tools/testing/selftests/kvm/memslot_perf_test.c
index 893366982f77..989ffe0d047f 100644
--- a/tools/testing/selftests/kvm/memslot_perf_test.c
+++ b/tools/testing/selftests/kvm/memslot_perf_test.c
@@ -113,7 +113,9 @@ static_assert(ATOMIC_BOOL_LOCK_FREE == 2, "atomic bool is not lockless");
static sem_t vcpu_ready;
static bool map_unmap_verify;
+#ifdef __x86_64__
static bool disable_slot_zap_quirk;
+#endif
static bool verbose;
#define pr_info_v(...) \
@@ -579,8 +581,10 @@ static bool test_memslot_move_prepare(struct vm_data *data,
uint32_t guest_page_size = data->vm->page_size;
uint64_t movesrcgpa, movetestgpa;
+#ifdef __x86_64__
if (disable_slot_zap_quirk)
vm_enable_cap(data->vm, KVM_CAP_DISABLE_QUIRKS2, KVM_X86_QUIRK_SLOT_ZAP_ALL);
+#endif
movesrcgpa = vm_slot2gpa(data, data->nslots - 1);
@@ -971,11 +975,13 @@ static bool parse_args(int argc, char *argv[],
case 'd':
map_unmap_verify = true;
break;
+#ifdef __x86_64__
case 'q':
disable_slot_zap_quirk = true;
TEST_REQUIRE(kvm_check_cap(KVM_CAP_DISABLE_QUIRKS2) &
KVM_X86_QUIRK_SLOT_ZAP_ALL);
break;
+#endif
case 's':
targs->nslots = atoi_paranoid(optarg);
if (targs->nslots <= 1 && targs->nslots != -1) {
diff --git a/tools/testing/selftests/kvm/x86_64/cpuid_test.c b/tools/testing/selftests/kvm/x86_64/cpuid_test.c
index 8c579ce714e9..fec03b11b059 100644
--- a/tools/testing/selftests/kvm/x86_64/cpuid_test.c
+++ b/tools/testing/selftests/kvm/x86_64/cpuid_test.c
@@ -60,7 +60,7 @@ static bool is_cpuid_mangled(const struct kvm_cpuid_entry2 *entrie)
{
int i;
- for (i = 0; i < sizeof(mangled_cpuids); i++) {
+ for (i = 0; i < ARRAY_SIZE(mangled_cpuids); i++) {
if (mangled_cpuids[i].function == entrie->function &&
mangled_cpuids[i].index == entrie->index)
return true;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 05cbb2548d99..141db5b79cd4 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3035,24 +3035,12 @@ kvm_pfn_t gfn_to_pfn_memslot_atomic(const struct kvm_memory_slot *slot, gfn_t gf
}
EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic);
-kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn)
-{
- return gfn_to_pfn_memslot_atomic(kvm_vcpu_gfn_to_memslot(vcpu, gfn), gfn);
-}
-EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_pfn_atomic);
-
kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
{
return gfn_to_pfn_memslot(gfn_to_memslot(kvm, gfn), gfn);
}
EXPORT_SYMBOL_GPL(gfn_to_pfn);
-kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
-{
- return gfn_to_pfn_memslot(kvm_vcpu_gfn_to_memslot(vcpu, gfn), gfn);
-}
-EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_pfn);
-
int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
struct page **pages, int nr_pages)
{
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