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authorAnthony Liguori <anthony@codemonkey.ws>2013-09-23 11:52:49 -0500
committerAnthony Liguori <anthony@codemonkey.ws>2013-09-23 11:52:49 -0500
commit3e4be9c29784df09c364b52a55e826a0b05b950e (patch)
tree7e897ca9337076c2e32f8fdbb03a135b52129eb5 /kvm-all.c
parentf3ca508f00fa1cc295334fe8f8010cd6ea45bacd (diff)
parentf010bc643a2759e87e989c3e4e85f15ec71ae98f (diff)
Merge remote-tracking branch 'qemu-kvm/uq/master' into staging
# By Alexey Kardashevskiy (3) and others # Via Paolo Bonzini * qemu-kvm/uq/master: target-i386: add feature kvm_pv_unhalt linux-headers: update to 3.12-rc1 target-i386: forward CPUID cache leaves when -cpu host is used linux-headers: update to 3.11 kvm: fix traces to use %x instead of %d kvmvapic: Clear also physical ROM address when entering INACTIVE state kvmvapic: Enter inactive state on hardware reset kvmvapic: Catch invalid ROM size kvm irqfd: support direct msimessage to irq translation fix steal time MSR vmsd callback to proper opaque type kvm: warn if num cpus is greater than num recommended cpu: Move cpu state syncs up into cpu_dump_state() exec: always use MADV_DONTFORK Message-id: 1379694292-1601-1-git-send-email-pbonzini@redhat.com
Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c82
1 files changed, 53 insertions, 29 deletions
diff --git a/kvm-all.c b/kvm-all.c
index b87215c10f..4478969ed2 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -111,6 +111,7 @@ bool kvm_halt_in_kernel_allowed;
bool kvm_irqfds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
+bool kvm_gsi_direct_mapping;
bool kvm_allowed;
bool kvm_readonly_mem_allowed;
@@ -1069,6 +1070,10 @@ void kvm_irqchip_release_virq(KVMState *s, int virq)
struct kvm_irq_routing_entry *e;
int i;
+ if (kvm_gsi_direct_mapping()) {
+ return;
+ }
+
for (i = 0; i < s->irq_routes->nr; i++) {
e = &s->irq_routes->entries[i];
if (e->gsi == virq) {
@@ -1190,6 +1195,10 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
struct kvm_irq_routing_entry kroute = {};
int virq;
+ if (kvm_gsi_direct_mapping()) {
+ return msg.data & 0xffff;
+ }
+
if (!kvm_gsi_routing_enabled()) {
return -ENOSYS;
}
@@ -1216,6 +1225,10 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
{
struct kvm_irq_routing_entry kroute = {};
+ if (kvm_gsi_direct_mapping()) {
+ return 0;
+ }
+
if (!kvm_irqchip_in_kernel()) {
return -ENOSYS;
}
@@ -1322,24 +1335,20 @@ static int kvm_irqchip_create(KVMState *s)
return 0;
}
-static int kvm_max_vcpus(KVMState *s)
+/* Find number of supported CPUs using the recommended
+ * procedure from the kernel API documentation to cope with
+ * older kernels that may be missing capabilities.
+ */
+static int kvm_recommended_vcpus(KVMState *s)
{
- int ret;
-
- /* Find number of supported CPUs using the recommended
- * procedure from the kernel API documentation to cope with
- * older kernels that may be missing capabilities.
- */
- ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
- if (ret) {
- return ret;
- }
- ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
- if (ret) {
- return ret;
- }
+ int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
+ return (ret) ? ret : 4;
+}
- return 4;
+static int kvm_max_vcpus(KVMState *s)
+{
+ int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
+ return (ret) ? ret : kvm_recommended_vcpus(s);
}
int kvm_init(void)
@@ -1347,11 +1356,19 @@ int kvm_init(void)
static const char upgrade_note[] =
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
"(see http://sourceforge.net/projects/kvm).\n";
+ struct {
+ const char *name;
+ int num;
+ } num_cpus[] = {
+ { "SMP", smp_cpus },
+ { "hotpluggable", max_cpus },
+ { NULL, }
+ }, *nc = num_cpus;
+ int soft_vcpus_limit, hard_vcpus_limit;
KVMState *s;
const KVMCapabilityInfo *missing_cap;
int ret;
int i;
- int max_vcpus;
s = g_malloc0(sizeof(KVMState));
@@ -1392,19 +1409,26 @@ int kvm_init(void)
goto err;
}
- max_vcpus = kvm_max_vcpus(s);
- if (smp_cpus > max_vcpus) {
- ret = -EINVAL;
- fprintf(stderr, "Number of SMP cpus requested (%d) exceeds max cpus "
- "supported by KVM (%d)\n", smp_cpus, max_vcpus);
- goto err;
- }
+ /* check the vcpu limits */
+ soft_vcpus_limit = kvm_recommended_vcpus(s);
+ hard_vcpus_limit = kvm_max_vcpus(s);
- if (max_cpus > max_vcpus) {
- ret = -EINVAL;
- fprintf(stderr, "Number of hotpluggable cpus requested (%d) exceeds max cpus "
- "supported by KVM (%d)\n", max_cpus, max_vcpus);
- goto err;
+ while (nc->name) {
+ if (nc->num > soft_vcpus_limit) {
+ fprintf(stderr,
+ "Warning: Number of %s cpus requested (%d) exceeds "
+ "the recommended cpus supported by KVM (%d)\n",
+ nc->name, nc->num, soft_vcpus_limit);
+
+ if (nc->num > hard_vcpus_limit) {
+ ret = -EINVAL;
+ fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
+ "the maximum cpus supported by KVM (%d)\n",
+ nc->name, nc->num, hard_vcpus_limit);
+ goto err;
+ }
+ }
+ nc++;
}
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);