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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-13 15:47:02 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-13 15:47:02 -0800 |
commit | 93173b5bf2841da7e3a9b0cb1312ef5c87251524 (patch) | |
tree | 629de2735f465ce0437f8dba85a00f766bbec31c /virt/kvm/kvm_main.c | |
parent | 1c59e1edb13d60b97b7b03b332ceed5d967d4227 (diff) | |
parent | f673b5b2a66332da5358def524dbfb3305c76d8c (diff) | |
download | op-kernel-dev-93173b5bf2841da7e3a9b0cb1312ef5c87251524.zip op-kernel-dev-93173b5bf2841da7e3a9b0cb1312ef5c87251524.tar.gz |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"Small release, the most interesting stuff is x86 nested virt
improvements.
x86:
- userspace can now hide nested VMX features from guests
- nested VMX can now run Hyper-V in a guest
- support for AVX512_4VNNIW and AVX512_FMAPS in KVM
- infrastructure support for virtual Intel GPUs.
PPC:
- support for KVM guests on POWER9
- improved support for interrupt polling
- optimizations and cleanups.
s390:
- two small optimizations, more stuff is in flight and will be in
4.11.
ARM:
- support for the GICv3 ITS on 32bit platforms"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (94 commits)
arm64: KVM: pmu: Reset PMSELR_EL0.SEL to a sane value before entering the guest
KVM: arm/arm64: timer: Check for properly initialized timer on init
KVM: arm/arm64: vgic-v2: Limit ITARGETSR bits to number of VCPUs
KVM: x86: Handle the kthread worker using the new API
KVM: nVMX: invvpid handling improvements
KVM: nVMX: check host CR3 on vmentry and vmexit
KVM: nVMX: introduce nested_vmx_load_cr3 and call it on vmentry
KVM: nVMX: propagate errors from prepare_vmcs02
KVM: nVMX: fix CR3 load if L2 uses PAE paging and EPT
KVM: nVMX: load GUEST_EFER after GUEST_CR0 during emulated VM-entry
KVM: nVMX: generate MSR_IA32_CR{0,4}_FIXED1 from guest CPUID
KVM: nVMX: fix checks on CR{0,4} during virtual VMX operation
KVM: nVMX: support restore of VMX capability MSRs
KVM: nVMX: generate non-true VMX MSRs based on true versions
KVM: x86: Do not clear RFLAGS.TF when a singlestep trap occurs.
KVM: x86: Add kvm_skip_emulated_instruction and use it.
KVM: VMX: Move skip_emulated_instruction out of nested_vmx_check_vmcs12
KVM: VMX: Reorder some skip_emulated_instruction calls
KVM: x86: Add a return value to kvm_emulate_cpuid
KVM: PPC: Book3S: Move prototypes for KVM functions into kvm_ppc.h
...
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r-- | virt/kvm/kvm_main.c | 87 |
1 files changed, 78 insertions, 9 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index c55f5d6..823544c 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -70,16 +70,19 @@ MODULE_AUTHOR("Qumranet"); MODULE_LICENSE("GPL"); /* Architectures should define their poll value according to the halt latency */ -static unsigned int halt_poll_ns = KVM_HALT_POLL_NS_DEFAULT; +unsigned int halt_poll_ns = KVM_HALT_POLL_NS_DEFAULT; module_param(halt_poll_ns, uint, S_IRUGO | S_IWUSR); +EXPORT_SYMBOL_GPL(halt_poll_ns); /* Default doubles per-vcpu halt_poll_ns. */ -static unsigned int halt_poll_ns_grow = 2; +unsigned int halt_poll_ns_grow = 2; module_param(halt_poll_ns_grow, uint, S_IRUGO | S_IWUSR); +EXPORT_SYMBOL_GPL(halt_poll_ns_grow); /* Default resets per-vcpu halt_poll_ns . */ -static unsigned int halt_poll_ns_shrink; +unsigned int halt_poll_ns_shrink; module_param(halt_poll_ns_shrink, uint, S_IRUGO | S_IWUSR); +EXPORT_SYMBOL_GPL(halt_poll_ns_shrink); /* * Ordering of locks: @@ -595,7 +598,7 @@ static int kvm_create_vm_debugfs(struct kvm *kvm, int fd) stat_data->kvm = kvm; stat_data->offset = p->offset; kvm->debugfs_stat_data[p - debugfs_entries] = stat_data; - if (!debugfs_create_file(p->name, 0444, + if (!debugfs_create_file(p->name, 0644, kvm->debugfs_dentry, stat_data, stat_fops_per_vm[p->kind])) @@ -3669,11 +3672,23 @@ static int vm_stat_get_per_vm(void *data, u64 *val) return 0; } +static int vm_stat_clear_per_vm(void *data, u64 val) +{ + struct kvm_stat_data *stat_data = (struct kvm_stat_data *)data; + + if (val) + return -EINVAL; + + *(ulong *)((void *)stat_data->kvm + stat_data->offset) = 0; + + return 0; +} + static int vm_stat_get_per_vm_open(struct inode *inode, struct file *file) { __simple_attr_check_format("%llu\n", 0ull); return kvm_debugfs_open(inode, file, vm_stat_get_per_vm, - NULL, "%llu\n"); + vm_stat_clear_per_vm, "%llu\n"); } static const struct file_operations vm_stat_get_per_vm_fops = { @@ -3699,11 +3714,26 @@ static int vcpu_stat_get_per_vm(void *data, u64 *val) return 0; } +static int vcpu_stat_clear_per_vm(void *data, u64 val) +{ + int i; + struct kvm_stat_data *stat_data = (struct kvm_stat_data *)data; + struct kvm_vcpu *vcpu; + + if (val) + return -EINVAL; + + kvm_for_each_vcpu(i, vcpu, stat_data->kvm) + *(u64 *)((void *)vcpu + stat_data->offset) = 0; + + return 0; +} + static int vcpu_stat_get_per_vm_open(struct inode *inode, struct file *file) { __simple_attr_check_format("%llu\n", 0ull); return kvm_debugfs_open(inode, file, vcpu_stat_get_per_vm, - NULL, "%llu\n"); + vcpu_stat_clear_per_vm, "%llu\n"); } static const struct file_operations vcpu_stat_get_per_vm_fops = { @@ -3738,7 +3768,26 @@ static int vm_stat_get(void *_offset, u64 *val) return 0; } -DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); +static int vm_stat_clear(void *_offset, u64 val) +{ + unsigned offset = (long)_offset; + struct kvm *kvm; + struct kvm_stat_data stat_tmp = {.offset = offset}; + + if (val) + return -EINVAL; + + spin_lock(&kvm_lock); + list_for_each_entry(kvm, &vm_list, vm_list) { + stat_tmp.kvm = kvm; + vm_stat_clear_per_vm((void *)&stat_tmp, 0); + } + spin_unlock(&kvm_lock); + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, vm_stat_clear, "%llu\n"); static int vcpu_stat_get(void *_offset, u64 *val) { @@ -3758,7 +3807,27 @@ static int vcpu_stat_get(void *_offset, u64 *val) return 0; } -DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); +static int vcpu_stat_clear(void *_offset, u64 val) +{ + unsigned offset = (long)_offset; + struct kvm *kvm; + struct kvm_stat_data stat_tmp = {.offset = offset}; + + if (val) + return -EINVAL; + + spin_lock(&kvm_lock); + list_for_each_entry(kvm, &vm_list, vm_list) { + stat_tmp.kvm = kvm; + vcpu_stat_clear_per_vm((void *)&stat_tmp, 0); + } + spin_unlock(&kvm_lock); + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, vcpu_stat_clear, + "%llu\n"); static const struct file_operations *stat_fops[] = { [KVM_STAT_VCPU] = &vcpu_stat_fops, @@ -3776,7 +3845,7 @@ static int kvm_init_debug(void) kvm_debugfs_num_entries = 0; for (p = debugfs_entries; p->name; ++p, kvm_debugfs_num_entries++) { - if (!debugfs_create_file(p->name, 0444, kvm_debugfs_dir, + if (!debugfs_create_file(p->name, 0644, kvm_debugfs_dir, (void *)(long)p->offset, stat_fops[p->kind])) goto out_dir; |