diff options
Diffstat (limited to 'target-ppc/kvm.c')
| -rw-r--r-- | target-ppc/kvm.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 6c7ca6fc50..fd17d23d2e 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -55,6 +55,7 @@ static int cap_interrupt_level = false; static int cap_segstate; static int cap_booke_sregs; static int cap_ppc_smt; +static int cap_ppc_rma; /* XXX We have a race condition where we actually have a level triggered * interrupt, but the infrastructure can't expose that yet, so the guest @@ -79,6 +80,7 @@ int kvm_arch_init(KVMState *s) cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE); cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS); cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT); + cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA); if (!cap_interrupt_level) { fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the " @@ -758,6 +760,48 @@ int kvmppc_smt_threads(void) return cap_ppc_smt ? cap_ppc_smt : 1; } +off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem) +{ + void *rma; + off_t size; + int fd; + struct kvm_allocate_rma ret; + MemoryRegion *rma_region; + + /* If cap_ppc_rma == 0, contiguous RMA allocation is not supported + * if cap_ppc_rma == 1, contiguous RMA allocation is supported, but + * not necessary on this hardware + * if cap_ppc_rma == 2, contiguous RMA allocation is needed on this hardware + * + * FIXME: We should allow the user to force contiguous RMA + * allocation in the cap_ppc_rma==1 case. + */ + if (cap_ppc_rma < 2) { + return 0; + } + + fd = kvm_vm_ioctl(kvm_state, KVM_ALLOCATE_RMA, &ret); + if (fd < 0) { + fprintf(stderr, "KVM: Error on KVM_ALLOCATE_RMA: %s\n", + strerror(errno)); + return -1; + } + + size = MIN(ret.rma_size, 256ul << 20); + + rma = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (rma == MAP_FAILED) { + fprintf(stderr, "KVM: Error mapping RMA: %s\n", strerror(errno)); + return -1; + }; + + rma_region = g_new(MemoryRegion, 1); + memory_region_init_ram_ptr(rma_region, NULL, name, size, rma); + memory_region_add_subregion(sysmem, 0, rma_region); + + return size; +} + bool kvm_arch_stop_on_emulation_error(CPUState *env) { return true; |