system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-07-22 03:01:14 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

KVM: Convert KVM_ARCH_WANT_MMU_NOTIFIER to CONFIG_KVM_GENERIC_MMU_NOTIFIER

Browse source 
Convert KVM_ARCH_WANT_MMU_NOTIFIER into a Kconfig and select it where
appropriate to effectively maintain existing behavior.  Using a proper
Kconfig will simplify building more functionality on top of KVM's
mmu_notifier infrastructure.

Add a forward declaration of kvm_gfn_range to kvm_types.h so that
including arch/powerpc/include/asm/kvm_ppc.h's with CONFIG_KVM=n doesn't
generate warnings due to kvm_gfn_range being undeclared.  PPC defines
hooks for PR vs. HV without guarding them via #ifdeffery, e.g.

  bool (*unmap_gfn_range)(struct kvm *kvm, struct kvm_gfn_range *range);
  bool (*age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
  bool (*test_age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
  bool (*set_spte_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);

Alternatively, PPC could forward declare kvm_gfn_range, but there's no
good reason not to define it in common KVM.

Acked-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Message-Id: <20231027182217.3615211-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2023-10-27 11:21:49 -07:00 committed by Paolo Bonzini
parent 4a2e993faa
commit f128cf8cfb
17 changed files with 23 additions and 31 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/arm64/include/asm/kvm_host.h
View file

@ -954,8 +954,6 @@ int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
struct kvm_vcpu_events *events);
#define KVM_ARCH_WANT_MMU_NOTIFIER
void kvm_arm_halt_guest(struct kvm *kvm);
void kvm_arm_resume_guest(struct kvm *kvm);

2
arch/arm64/kvm/Kconfig
View file

@ -22,7 +22,7 @@ menuconfig KVM
bool "Kernel-based Virtual Machine (KVM) support"
depends on HAVE_KVM
select KVM_GENERIC_HARDWARE_ENABLING
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
select PREEMPT_NOTIFIERS
select HAVE_KVM_CPU_RELAX_INTERCEPT
select KVM_MMIO

1
arch/loongarch/include/asm/kvm_host.h
View file

@ -183,7 +183,6 @@ void kvm_flush_tlb_all(void);
void kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa);
int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long badv, bool write);
#define KVM_ARCH_WANT_MMU_NOTIFIER
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, bool blockable);
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);

2
arch/loongarch/kvm/Kconfig
View file

@ -26,9 +26,9 @@ config KVM
select HAVE_KVM_VCPU_ASYNC_IOCTL
select KVM_GENERIC_DIRTYLOG_READ_PROTECT
select KVM_GENERIC_HARDWARE_ENABLING
select KVM_GENERIC_MMU_NOTIFIER
select KVM_MMIO
select KVM_XFER_TO_GUEST_WORK
select MMU_NOTIFIER
select PREEMPT_NOTIFIERS
help
Support hosting virtualized guest machines using

2
arch/mips/include/asm/kvm_host.h
View file

@ -810,8 +810,6 @@ int kvm_mips_mkclean_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn);
pgd_t *kvm_pgd_alloc(void);
void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu);
#define KVM_ARCH_WANT_MMU_NOTIFIER
/* Emulation */
enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause);
int kvm_get_badinstr(u32 *opc, struct kvm_vcpu *vcpu, u32 *out);

2
arch/mips/kvm/Kconfig
View file

@ -25,7 +25,7 @@ config KVM
select HAVE_KVM_EVENTFD
select HAVE_KVM_VCPU_ASYNC_IOCTL
select KVM_MMIO
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
select INTERVAL_TREE
select KVM_GENERIC_HARDWARE_ENABLING
help

2
arch/powerpc/include/asm/kvm_host.h
View file

@ -62,8 +62,6 @@
#include <linux/mmu_notifier.h>
#define KVM_ARCH_WANT_MMU_NOTIFIER
#define HPTEG_CACHE_NUM (1 << 15)
#define HPTEG_HASH_BITS_PTE 13
#define HPTEG_HASH_BITS_PTE_LONG 12

8
arch/powerpc/kvm/Kconfig
View file

@ -42,7 +42,7 @@ config KVM_BOOK3S_64_HANDLER
config KVM_BOOK3S_PR_POSSIBLE
bool
select KVM_MMIO
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
config KVM_BOOK3S_HV_POSSIBLE
bool
@ -85,7 +85,7 @@ config KVM_BOOK3S_64_HV
tristate "KVM for POWER7 and later using hypervisor mode in host"
depends on KVM_BOOK3S_64 && PPC_POWERNV
select KVM_BOOK3S_HV_POSSIBLE
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
select CMA
help
Support running unmodified book3s_64 guest kernels in
@ -194,7 +194,7 @@ config KVM_E500V2
depends on !CONTEXT_TRACKING_USER
select KVM
select KVM_MMIO
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
help
Support running unmodified E500 guest kernels in virtual machines on
E500v2 host processors.
@ -211,7 +211,7 @@ config KVM_E500MC
select KVM
select KVM_MMIO
select KVM_BOOKE_HV
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
help
Support running unmodified E500MC/E5500/E6500 guest kernels in
virtual machines on E500MC/E5500/E6500 host processors.

4
arch/powerpc/kvm/powerpc.c
View file

@ -632,9 +632,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
break;
#endif
case KVM_CAP_SYNC_MMU:
#if !defined(CONFIG_MMU_NOTIFIER) || !defined(KVM_ARCH_WANT_MMU_NOTIFIER)
BUILD_BUG();
#endif
BUILD_BUG_ON(!IS_ENABLED(CONFIG_KVM_GENERIC_MMU_NOTIFIER));
r = 1;
break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE

2
arch/riscv/include/asm/kvm_host.h
View file

@ -267,8 +267,6 @@ struct kvm_vcpu_arch {
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
#define KVM_ARCH_WANT_MMU_NOTIFIER
#define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12
void kvm_riscv_local_hfence_gvma_vmid_gpa(unsigned long vmid,

2
arch/riscv/kvm/Kconfig
View file

@ -30,7 +30,7 @@ config KVM
select KVM_GENERIC_HARDWARE_ENABLING
select KVM_MMIO
select KVM_XFER_TO_GUEST_WORK
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
select PREEMPT_NOTIFIERS
help
Support hosting virtualized guest machines.

2
arch/x86/include/asm/kvm_host.h
View file

@ -2141,8 +2141,6 @@ enum {
# define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, 0)
#endif
#define KVM_ARCH_WANT_MMU_NOTIFIER
int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v);
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
int kvm_cpu_has_extint(struct kvm_vcpu *v);

2
arch/x86/kvm/Kconfig
View file

@ -24,7 +24,7 @@ config KVM
depends on HIGH_RES_TIMERS
depends on X86_LOCAL_APIC
select PREEMPT_NOTIFIERS
select MMU_NOTIFIER
select KVM_GENERIC_MMU_NOTIFIER
select HAVE_KVM_IRQCHIP
select HAVE_KVM_PFNCACHE
select HAVE_KVM_IRQFD

6
include/linux/kvm_host.h
View file

@ -253,7 +253,7 @@ bool kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
#endif
#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER
union kvm_mmu_notifier_arg {
pte_t pte;
};
@ -783,7 +783,7 @@ struct kvm {
struct hlist_head irq_ack_notifier_list;
#endif
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER
struct mmu_notifier mmu_notifier;
unsigned long mmu_invalidate_seq;
long mmu_invalidate_in_progress;
@ -1946,7 +1946,7 @@ extern const struct _kvm_stats_desc kvm_vm_stats_desc[];
extern const struct kvm_stats_header kvm_vcpu_stats_header;
extern const struct _kvm_stats_desc kvm_vcpu_stats_desc[];
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER
static inline int mmu_invalidate_retry(struct kvm *kvm, unsigned long mmu_seq)
{
if (unlikely(kvm->mmu_invalidate_in_progress))

1
include/linux/kvm_types.h
View file

@ -6,6 +6,7 @@
struct kvm;
struct kvm_async_pf;
struct kvm_device_ops;
struct kvm_gfn_range;
struct kvm_interrupt;
struct kvm_irq_routing_table;
struct kvm_memory_slot;

4
virt/kvm/Kconfig
View file

@ -92,3 +92,7 @@ config HAVE_KVM_PM_NOTIFIER
config KVM_GENERIC_HARDWARE_ENABLING
bool
config KVM_GENERIC_MMU_NOTIFIER
select MMU_NOTIFIER
bool

10
virt/kvm/kvm_main.c
View file

@ -535,7 +535,7 @@ void kvm_destroy_vcpus(struct kvm *kvm)
}
EXPORT_SYMBOL_GPL(kvm_destroy_vcpus);
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER
static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn)
{
return container_of(mn, struct kvm, mmu_notifier);
@ -962,14 +962,14 @@ static int kvm_init_mmu_notifier(struct kvm *kvm)
return mmu_notifier_register(&kvm->mmu_notifier, current->mm);
}
#else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */
#else /* !CONFIG_KVM_GENERIC_MMU_NOTIFIER */
static int kvm_init_mmu_notifier(struct kvm *kvm)
{
return 0;
}
#endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */
#endif /* CONFIG_KVM_GENERIC_MMU_NOTIFIER */
#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
static int kvm_pm_notifier_call(struct notifier_block *bl,
@ -1289,7 +1289,7 @@ static struct kvm *kvm_create_vm(unsigned long type, const char *fdname)
out_err_no_debugfs:
kvm_coalesced_mmio_free(kvm);
out_no_coalesced_mmio:
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER
if (kvm->mmu_notifier.ops)
mmu_notifier_unregister(&kvm->mmu_notifier, current->mm);
#endif
@ -1349,7 +1349,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
kvm->buses[i] = NULL;
}
kvm_coalesced_mmio_free(kvm);
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER
mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm);
/*
* At this point, pending calls to invalidate_range_start()