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authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2015-04-01 17:12:14 +0300
committerIngo Molnar <mingo@kernel.org>2015-04-02 13:06:41 +0300
commit3f85483bd80ef1de8cbbf0361be59f6a069b59d4 (patch)
tree9cc52f70fcd1181a562735f44c222cca3276ffc1 /arch/x86/xen/smp.c
parent40e4f2d177f748a83e7639554ea7d11568a9fa1f (diff)
downloadlinux-3f85483bd80ef1de8cbbf0361be59f6a069b59d4.tar.xz
x86/cpu: Factor out common CPU initialization code, fix 32-bit Xen PV guests
Some of x86 bare-metal and Xen CPU initialization code is common between the two and therefore can be factored out to avoid code duplication. As a side effect, doing so will also extend the fix provided by commit a7fcf28d431e ("x86/asm/entry: Replace this_cpu_sp0() with current_top_of_stack() to x86_32") to 32-bit Xen PV guests. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: konrad.wilk@oracle.com Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1427897534-5086-1-git-send-email-boris.ostrovsky@oracle.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/xen/smp.c')
-rw-r--r--arch/x86/xen/smp.c13
1 files changed, 1 insertions, 12 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 765b7684f858..7413ee3706d0 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -445,14 +445,7 @@ static int xen_cpu_up(unsigned int cpu, struct task_struct *idle)
{
int rc;
- per_cpu(current_task, cpu) = idle;
-#ifdef CONFIG_X86_32
- irq_ctx_init(cpu);
-#else
- clear_tsk_thread_flag(idle, TIF_FORK);
-#endif
- per_cpu(kernel_stack, cpu) =
- (unsigned long)task_stack_page(idle) + THREAD_SIZE;
+ common_cpu_up(cpu, idle);
xen_setup_runstate_info(cpu);
xen_setup_timer(cpu);
@@ -467,10 +460,6 @@ static int xen_cpu_up(unsigned int cpu, struct task_struct *idle)
if (rc)
return rc;
- if (num_online_cpus() == 1)
- /* Just in case we booted with a single CPU. */
- alternatives_enable_smp();
-
rc = xen_smp_intr_init(cpu);
if (rc)
return rc;