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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 /arch/s390 | |
parent | 1c59e1edb13d60b97b7b03b332ceed5d967d4227 (diff) | |
parent | f673b5b2a66332da5358def524dbfb3305c76d8c (diff) | |
download | linux-93173b5bf2841da7e3a9b0cb1312ef5c87251524.tar.gz linux-93173b5bf2841da7e3a9b0cb1312ef5c87251524.tar.bz2 linux-93173b5bf2841da7e3a9b0cb1312ef5c87251524.zip |
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 'arch/s390')
-rw-r--r-- | arch/s390/kvm/interrupt.c | 2 | ||||
-rw-r--r-- | arch/s390/kvm/kvm-s390.c | 57 |
2 files changed, 27 insertions, 32 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index be4db07f70d3..af13f1a135b6 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -415,7 +415,7 @@ static int __write_machine_check(struct kvm_vcpu *vcpu, int rc; mci.val = mchk->mcic; - /* take care of lazy register loading via vcpu load/put */ + /* take care of lazy register loading */ save_fpu_regs(); save_access_regs(vcpu->run->s.regs.acrs); diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 9c7a1ecfe6bd..bec71e902be3 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1812,22 +1812,7 @@ __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { - /* Save host register state */ - save_fpu_regs(); - vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; - vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; - - if (MACHINE_HAS_VX) - current->thread.fpu.regs = vcpu->run->s.regs.vrs; - else - current->thread.fpu.regs = vcpu->run->s.regs.fprs; - current->thread.fpu.fpc = vcpu->run->s.regs.fpc; - if (test_fp_ctl(current->thread.fpu.fpc)) - /* User space provided an invalid FPC, let's clear it */ - current->thread.fpu.fpc = 0; - save_access_regs(vcpu->arch.host_acrs); - restore_access_regs(vcpu->run->s.regs.acrs); gmap_enable(vcpu->arch.enabled_gmap); atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) @@ -1844,16 +1829,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) vcpu->arch.enabled_gmap = gmap_get_enabled(); gmap_disable(vcpu->arch.enabled_gmap); - /* Save guest register state */ - save_fpu_regs(); - vcpu->run->s.regs.fpc = current->thread.fpu.fpc; - - /* Restore host register state */ - current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; - current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; - - save_access_regs(vcpu->run->s.regs.acrs); - restore_access_regs(vcpu->arch.host_acrs); } static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) @@ -2243,7 +2218,6 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, { memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); - restore_access_regs(vcpu->run->s.regs.acrs); return 0; } @@ -2257,11 +2231,9 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) { - /* make sure the new values will be lazily loaded */ - save_fpu_regs(); if (test_fp_ctl(fpu->fpc)) return -EINVAL; - current->thread.fpu.fpc = fpu->fpc; + vcpu->run->s.regs.fpc = fpu->fpc; if (MACHINE_HAS_VX) convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs, (freg_t *) fpu->fprs); @@ -2279,7 +2251,7 @@ int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) (__vector128 *) vcpu->run->s.regs.vrs); else memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs)); - fpu->fpc = current->thread.fpu.fpc; + fpu->fpc = vcpu->run->s.regs.fpc; return 0; } @@ -2740,6 +2712,20 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) if (riccb->valid) vcpu->arch.sie_block->ecb3 |= 0x01; } + save_access_regs(vcpu->arch.host_acrs); + restore_access_regs(vcpu->run->s.regs.acrs); + /* save host (userspace) fprs/vrs */ + save_fpu_regs(); + vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; + vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; + if (MACHINE_HAS_VX) + current->thread.fpu.regs = vcpu->run->s.regs.vrs; + else + current->thread.fpu.regs = vcpu->run->s.regs.fprs; + current->thread.fpu.fpc = vcpu->run->s.regs.fpc; + if (test_fp_ctl(current->thread.fpu.fpc)) + /* User space provided an invalid FPC, let's clear it */ + current->thread.fpu.fpc = 0; kvm_run->kvm_dirty_regs = 0; } @@ -2758,6 +2744,15 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) kvm_run->s.regs.pft = vcpu->arch.pfault_token; kvm_run->s.regs.pfs = vcpu->arch.pfault_select; kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; + save_access_regs(vcpu->run->s.regs.acrs); + restore_access_regs(vcpu->arch.host_acrs); + /* Save guest register state */ + save_fpu_regs(); + vcpu->run->s.regs.fpc = current->thread.fpu.fpc; + /* Restore will be done lazily at return */ + current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; + current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; + } int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) @@ -2874,7 +2869,7 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) { /* * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy - * copying in vcpu load/put. Lets update our copies before we save + * switch in the run ioctl. Let's update our copies before we save * it into the save area */ save_fpu_regs(); |