From 90a18a9e2e585413eba96ab96df4a878f6c405be Mon Sep 17 00:00:00 2001 From: Ani Sinha Date: Thu, 8 Aug 2024 17:08:38 +0530 Subject: [PATCH 3/9] kvm: refactor core virtual machine creation into its own function RH-Author: Peter Xu RH-MergeRequest: 284: KVM: Dynamic sized kvm memslots array RH-Jira: RHEL-57682 RH-Acked-by: Juraj Marcin RH-Commit: [2/7] 3db75ee31b109048ef2de5c7f193116ab8c185a7 (peterx/qemu-kvm) Refactoring the core logic around KVM_CREATE_VM into its own separate function so that it can be called from other functions in subsequent patches. There is no functional change in this patch. CC: pbonzini@redhat.com CC: zhao1.liu@intel.com Signed-off-by: Ani Sinha Link: https://lore.kernel.org/r/20240808113838.1697366-1-anisinha@redhat.com Signed-off-by: Paolo Bonzini (cherry picked from commit 67388078da1cf6dac89e5a7c748cca3444d49690) Signed-off-by: Peter Xu --- accel/kvm/kvm-all.c | 89 ++++++++++++++++++++++++++++----------------- 1 file changed, 56 insertions(+), 33 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index b51441523d..4f96d8b45e 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -2385,6 +2385,60 @@ uint32_t kvm_dirty_ring_size(void) return kvm_state->kvm_dirty_ring_size; } +static int do_kvm_create_vm(MachineState *ms, int type) +{ + KVMState *s; + int ret; + + s = KVM_STATE(ms->accelerator); + + do { + ret = kvm_ioctl(s, KVM_CREATE_VM, type); + } while (ret == -EINTR); + + if (ret < 0) { + error_report("ioctl(KVM_CREATE_VM) failed: %s", strerror(-ret)); + +#ifdef TARGET_S390X + if (ret == -EINVAL) { + error_printf("Host kernel setup problem detected." + " Please verify:\n"); + error_printf("- for kernels supporting the" + " switch_amode or user_mode parameters, whether"); + error_printf(" user space is running in primary address space\n"); + error_printf("- for kernels supporting the vm.allocate_pgste" + " sysctl, whether it is enabled\n"); + } +#elif defined(TARGET_PPC) + if (ret == -EINVAL) { + error_printf("PPC KVM module is not loaded. Try modprobe kvm_%s.\n", + (type == 2) ? "pr" : "hv"); + } +#endif + } + + return ret; +} + +static int find_kvm_machine_type(MachineState *ms) +{ + MachineClass *mc = MACHINE_GET_CLASS(ms); + int type; + + if (object_property_find(OBJECT(current_machine), "kvm-type")) { + g_autofree char *kvm_type; + kvm_type = object_property_get_str(OBJECT(current_machine), + "kvm-type", + &error_abort); + type = mc->kvm_type(ms, kvm_type); + } else if (mc->kvm_type) { + type = mc->kvm_type(ms, NULL); + } else { + type = kvm_arch_get_default_type(ms); + } + return type; +} + static int kvm_init(MachineState *ms) { MachineClass *mc = MACHINE_GET_CLASS(ms); @@ -2467,45 +2521,14 @@ static int kvm_init(MachineState *ms) } s->as = g_new0(struct KVMAs, s->nr_as); - if (object_property_find(OBJECT(current_machine), "kvm-type")) { - g_autofree char *kvm_type = object_property_get_str(OBJECT(current_machine), - "kvm-type", - &error_abort); - type = mc->kvm_type(ms, kvm_type); - } else if (mc->kvm_type) { - type = mc->kvm_type(ms, NULL); - } else { - type = kvm_arch_get_default_type(ms); - } - + type = find_kvm_machine_type(ms); if (type < 0) { ret = -EINVAL; goto err; } - do { - ret = kvm_ioctl(s, KVM_CREATE_VM, type); - } while (ret == -EINTR); - + ret = do_kvm_create_vm(ms, type); if (ret < 0) { - error_report("ioctl(KVM_CREATE_VM) failed: %s", strerror(-ret)); - -#ifdef TARGET_S390X - if (ret == -EINVAL) { - error_printf("Host kernel setup problem detected." - " Please verify:\n"); - error_printf("- for kernels supporting the" - " switch_amode or user_mode parameters, whether"); - error_printf(" user space is running in primary address space\n"); - error_printf("- for kernels supporting the vm.allocate_pgste" - " sysctl, whether it is enabled\n"); - } -#elif defined(TARGET_PPC) - if (ret == -EINVAL) { - error_printf("PPC KVM module is not loaded. Try modprobe kvm_%s.\n", - (type == 2) ? "pr" : "hv"); - } -#endif goto err; } -- 2.39.3