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authorVitaly Kuznetsov <vkuznets@redhat.com>2016-06-30 17:56:43 +0200
committerDavid Vrabel <david.vrabel@citrix.com>2016-07-25 13:34:23 +0100
commitee42d665d3f5db975caf87baf101a57235ddb566 (patch)
tree340d28824d43040956c1cb17b95d29722d12eab3 /arch/x86
parentcbbb4682394c45986a34d8c77a02e7a066e30235 (diff)
downloadlinux-ee42d665d3f5db975caf87baf101a57235ddb566.tar.bz2
xen/pvhvm: run xen_vcpu_setup() for the boot CPU
Historically we didn't call VCPUOP_register_vcpu_info for CPU0 for PVHVM guests (while we had it for PV and ARM guests). This is usually fine as we can use vcpu info in the shared_info page but when we try booting on a vCPU with Xen's vCPU id > 31 (e.g. when we try to kdump after crashing on this CPU) we're not able to boot. Switch to always doing VCPUOP_register_vcpu_info for the boot CPU. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/xen/enlighten.c2
-rw-r--r--arch/x86/xen/smp.c7
-rw-r--r--arch/x86/xen/xen-ops.h1
3 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 5ca92e600a69..85ef4c0442e0 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -184,7 +184,7 @@ static void clamp_max_cpus(void)
#endif
}
-static void xen_vcpu_setup(int cpu)
+void xen_vcpu_setup(int cpu)
{
struct vcpu_register_vcpu_info info;
int err;
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index a3118f250416..0b4d04c8ab4d 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -322,6 +322,13 @@ static void __init xen_smp_prepare_boot_cpu(void)
xen_filter_cpu_maps();
xen_setup_vcpu_info_placement();
}
+
+ /*
+ * Setup vcpu_info for boot CPU.
+ */
+ if (xen_hvm_domain())
+ xen_vcpu_setup(0);
+
/*
* The alternative logic (which patches the unlock/lock) runs before
* the smp bootup up code is activated. Hence we need to set this up
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 4140b070f2e9..3cbce3b085e7 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -76,6 +76,7 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
bool xen_vcpu_stolen(int vcpu);
+void xen_vcpu_setup(int cpu);
void xen_setup_vcpu_info_placement(void);
#ifdef CONFIG_SMP