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authorLinus Torvalds <torvalds@linux-foundation.org>2013-08-21 16:38:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-08-21 16:38:33 -0700
commitd936d2d452ca1848cc4b397bdfb96d4278b9f934 (patch)
tree205a6d386d363d94208a3340f911009d74d2aa29 /arch/x86/xen/smp.c
parent0903391acbc1b509a60a6cb682344c748a69821a (diff)
parentfc78d343fa74514f6fd117b5ef4cd27e4ac30236 (diff)
downloadop-kernel-dev-d936d2d452ca1848cc4b397bdfb96d4278b9f934.zip
op-kernel-dev-d936d2d452ca1848cc4b397bdfb96d4278b9f934.tar.gz
Merge tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen bug-fixes from Konrad Rzeszutek Wilk: - On ARM did not have balanced calls to get/put_cpu. - Fix to make tboot + Xen + Linux correctly. - Fix events VCPU binding issues. - Fix a vCPU online race where IPIs are sent to not-yet-online vCPU. * tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/smp: initialize IPI vectors before marking CPU online xen/events: mask events when changing their VCPU binding xen/events: initialize local per-cpu mask for all possible events x86/xen: do not identity map UNUSABLE regions in the machine E820 xen/arm: missing put_cpu in xen_percpu_init
Diffstat (limited to 'arch/x86/xen/smp.c')
-rw-r--r--arch/x86/xen/smp.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index ca92754..b81c88e 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -694,8 +694,15 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
static int xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle)
{
int rc;
- rc = native_cpu_up(cpu, tidle);
- WARN_ON (xen_smp_intr_init(cpu));
+ /*
+ * xen_smp_intr_init() needs to run before native_cpu_up()
+ * so that IPI vectors are set up on the booting CPU before
+ * it is marked online in native_cpu_up().
+ */
+ rc = xen_smp_intr_init(cpu);
+ WARN_ON(rc);
+ if (!rc)
+ rc = native_cpu_up(cpu, tidle);
return rc;
}
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