From e15a8621935cac527b4e0ed4078d24c3e5ef73a6 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Thu, 30 Jun 2016 17:56:39 +0200 Subject: [PATCH] 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 Signed-off-by: David Vrabel --- arch/x86/xen/enlighten.c | 10 ++++++---- 1 file 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)]; } } -- 2.20.1