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xen/setup: Route halt operations to safe_halt pvop.

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With this patch, the cpuidle driver does not load and
does not issue the mwait operations. Instead the hypervisor
is doing them (b/c we call the safe_halt pvops call).

This fixes quite a lot of bootup issues wherein the user had
to force interrupts for the continuation of the bootup.

Details are discussed in:

http://lists.xensource.com/archives/html/xen-devel/2011-01/msg00535.html

[v2: Wrote the commit description]

Reported-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Tested-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Stefano Stabellini 2011-01-26 17:07:27 +00:00 committed by Konrad Rzeszutek Wilk
parent 7cb31b752c
commit 23febeddbe
1 changed files with 1 additions and 0 deletions
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arch/x86/xen/setup.c
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@ -355,6 +355,7 @@ void __init xen_arch_setup(void)
boot_cpu_data.hlt_works_ok = 1; boot_cpu_data.hlt_works_ok = 1;
#endif #endif
pm_idle = default_idle; pm_idle = default_idle;
boot_option_idle_override = IDLE_HALT;
fiddle_vdso(); fiddle_vdso();
} }