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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-06-30 17:56:43 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-07-25 13:34:23 +0100 |
| commit | ee42d665d3f5db975caf87baf101a57235ddb566 (patch) | |
| tree | 340d28824d43040956c1cb17b95d29722d12eab3 /arch | |
| parent | cbbb4682394c45986a34d8c77a02e7a066e30235 (diff) | |
| download | linux-stable-ee42d665d3f5db975caf87baf101a57235ddb566.tar.gz linux-stable-ee42d665d3f5db975caf87baf101a57235ddb566.tar.bz2 linux-stable-ee42d665d3f5db975caf87baf101a57235ddb566.zip | |
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')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/smp.c | 7 | ||||
| -rw-r--r-- | arch/x86/xen/xen-ops.h | 1 |
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 |