diff options
Diffstat (limited to 'usr/src/uts/i86pc/io/vmm/vmm.c')
| -rw-r--r-- | usr/src/uts/i86pc/io/vmm/vmm.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/usr/src/uts/i86pc/io/vmm/vmm.c b/usr/src/uts/i86pc/io/vmm/vmm.c index bad3ac6317..2e5198310c 100644 --- a/usr/src/uts/i86pc/io/vmm/vmm.c +++ b/usr/src/uts/i86pc/io/vmm/vmm.c @@ -36,7 +36,7 @@ * http://www.illumos.org/license/CDDL. * * Copyright 2015 Pluribus Networks Inc. - * Copyright 2017 Joyent, Inc. + * Copyright 2018 Joyent, Inc. */ #include <sys/cdefs.h> @@ -1735,6 +1735,39 @@ vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip) vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1); } +#ifndef __FreeBSD__ +/* + * Some vmm resources, such as the lapic, may have CPU-specific resources + * allocated to them which would benefit from migration onto the host CPU which + * is processing the vcpu state. When running on a host CPU different from + * previous activity, attempt to localize resources when possible. + */ +static void +vm_localize_resources(struct vm *vm, struct vcpu *vcpu) +{ + if (vcpu->hostcpu == curcpu) + return; + + /* + * The cyclic backing the LAPIC timer is nice to have local as + * reprogramming operations would otherwise require a crosscall. + */ + vlapic_localize_resources(vcpu->vlapic); + + /* + * Localize system-wide resources to the primary boot vCPU. While any + * of the other vCPUs may access them, it keeps the potential interrupt + * footprint constrained to CPUs involved with this instance. + */ + if (vcpu == &vm->vcpu[0]) { + vhpet_localize_resources(vm->vhpet); + vrtc_localize_resources(vm->vrtc); + } + +} +#endif /* __FreeBSD */ + + int vm_run(struct vm *vm, struct vm_run *vmrun) { @@ -1783,6 +1816,8 @@ restart: #endif #ifndef __FreeBSD__ + vm_localize_resources(vm, vcpu); + installctx(curthread, vcpu, save_guest_fpustate, restore_guest_fpustate, NULL, NULL, NULL, NULL); #endif |