From: Wei, G. <gan...@in...> - 2011-12-21 11:23:04
|
Without this delay, Xen could not bring APs up while working with TXT/tboot, because tboot need some time in APs to handle INIT before becoming ready for receiving SIPIs. (this delay was removed as part of c/s 23724 by Tim Deegan) Signed-off-by: Gang Wei <gan...@in...> diff -r d1aefee43af1 xen/arch/x86/smpboot.c --- a/xen/arch/x86/smpboot.c Wed Dec 21 18:51:31 2011 +0800 +++ b/xen/arch/x86/smpboot.c Wed Dec 21 19:08:57 2011 +0800 @@ -463,6 +463,10 @@ static int wakeup_secondary_cpu(int phys send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY; } while ( send_status && (timeout++ < 1000) ); } + else + { + mdelay(10); + } /* * Should we send STARTUP IPIs ? |