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KVM: Fix hotplug of CPUs

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Both VMX and SVM require per-cpu memory allocation, which is done at module
init time, for only online cpus.

Backend was not allocating enough structure for all possible CPUs, so
new CPUs coming online could not be hardware enabled.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Zachary Amsden 2009-09-29 11:38:37 -10:00 committed by Avi Kivity
parent e6732a5af9
commit 3230bb4707
2 changed files with 6 additions and 4 deletions
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4
arch/x86/kvm/svm.c
View file

@ -482,7 +482,7 @@ static __init int svm_hardware_setup(void)
kvm_enable_efer_bits(EFER_SVME);
}
for_each_online_cpu(cpu) {
for_each_possible_cpu(cpu) {
r = svm_cpu_init(cpu);
if (r)
goto err;
@ -516,7 +516,7 @@ static __exit void svm_hardware_unsetup(void)
{
int cpu;
for_each_online_cpu(cpu)
for_each_possible_cpu(cpu)
svm_cpu_uninit(cpu);
__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);

6
arch/x86/kvm/vmx.c
View file

@ -1350,15 +1350,17 @@ static void free_kvm_area(void)
{
int cpu;
for_each_online_cpu(cpu)
for_each_possible_cpu(cpu) {
free_vmcs(per_cpu(vmxarea, cpu));
per_cpu(vmxarea, cpu) = NULL;
}
}
static __init int alloc_kvm_area(void)
{
int cpu;
for_each_online_cpu(cpu) {
for_each_possible_cpu(cpu) {
struct vmcs *vmcs;
vmcs = alloc_vmcs_cpu(cpu);