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| author | Marc Orr <marcorr@google.com> | 2018-05-15 04:37:37 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-06-01 19:18:26 +0200 |
| commit | d1e5b0e98ea27b4f17871dc4e8ea4b0447e35221 (patch) | |
| tree | b0e6a402dc55ae6809456f40b690360cc8b687ca /arch/arm | |
| parent | 1499fa809e9e6713952ef84a7e9d51606881681f (diff) | |
| download | linux-d1e5b0e98ea27b4f17871dc4e8ea4b0447e35221.tar.gz linux-d1e5b0e98ea27b4f17871dc4e8ea4b0447e35221.tar.bz2 linux-d1e5b0e98ea27b4f17871dc4e8ea4b0447e35221.zip | |
kvm: Make VM ioctl do valloc for some archs
The kvm struct has been bloating. For example, it's tens of kilo-bytes
for x86, which turns out to be a large amount of memory to allocate
contiguously via kzalloc. Thus, this patch does the following:
1. Uses architecture-specific routines to allocate the kvm struct via
vzalloc for x86.
2. Switches arm to __KVM_HAVE_ARCH_VM_ALLOC so that it can use vzalloc
when has_vhe() is true.
Other architectures continue to default to kalloc, as they have a
dependency on kalloc or have a small-enough struct kvm.
Signed-off-by: Marc Orr <marcorr@google.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index f079a2039c8a..4b12f32f540c 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -324,4 +324,8 @@ static inline bool kvm_arm_harden_branch_predictor(void) static inline void kvm_vcpu_load_sysregs(struct kvm_vcpu *vcpu) {} static inline void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu) {} +#define __KVM_HAVE_ARCH_VM_ALLOC +struct kvm *kvm_arch_alloc_vm(void); +void kvm_arch_free_vm(struct kvm *kvm); + #endif /* __ARM_KVM_HOST_H__ */ |