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authorVitaly Kuznetsov <vkuznets@redhat.com>2016-06-30 18:56:39 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2016-07-25 15:33:40 +0300
commite15a8621935cac527b4e0ed4078d24c3e5ef73a6 (patch)
tree0a0e40f71d1f5154eec12a07a9979430aa5b5a71 /arch/x86/xen
parentad5475f9faf5186b7f59de2c6481ee3e211f1ed7 (diff)
downloadlinux-e15a8621935cac527b4e0ed4078d24c3e5ef73a6.tar.xz
x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info
shared_info page has space for 32 vcpu info slots for first 32 vCPUs but these are the first 32 vCPUs from Xen's perspective and we should map them accordingly with the newly introduced xen_vcpu_id mapping. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/enlighten.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 46f3399aee2c..5ca92e600a69 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -207,8 +207,9 @@ static void xen_vcpu_setup(int cpu)
if (per_cpu(xen_vcpu, cpu) == &per_cpu(xen_vcpu_info, cpu))
return;
}
- if (cpu < MAX_VIRT_CPUS)
- per_cpu(xen_vcpu,cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
+ if (xen_vcpu_nr(cpu) < MAX_VIRT_CPUS)
+ per_cpu(xen_vcpu, cpu) =
+ &HYPERVISOR_shared_info->vcpu_info[xen_vcpu_nr(cpu)];
if (!have_vcpu_info_placement) {
if (cpu >= MAX_VIRT_CPUS)
@@ -1783,9 +1784,10 @@ void __ref xen_hvm_init_shared_info(void)
* in that case multiple vcpus might be online. */
for_each_online_cpu(cpu) {
/* Leave it to be NULL. */
- if (cpu >= MAX_VIRT_CPUS)
+ if (xen_vcpu_nr(cpu) >= MAX_VIRT_CPUS)
continue;
- per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
+ per_cpu(xen_vcpu, cpu) =
+ &HYPERVISOR_shared_info->vcpu_info[xen_vcpu_nr(cpu)];
}
}