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[PATCH 30 of 31] xen: no need for domU to worry about MCE/MCA

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From: Jeremy Fitzhardinge
Subject: [PATCH 30 of 31] xen: no need for domU to worry about MCE/MCA
Date: Monday, March 17, 2008 - 4:37 pm

Mask MCE/MCA out of cpu caps.  Its harmless to leave them there, but
it does prevent the kernel from starting an unnecessary thread.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 arch/x86/xen/enlighten.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -155,6 +155,8 @@
 	if (*ax == 1)
 		maskedx = ~((1 << X86_FEATURE_APIC) |  /* disable APIC */
 			    (1 << X86_FEATURE_ACPI) |  /* disable ACPI */
+			    (1 << X86_FEATURE_MCE)  |  /* disable MCE */
+			    (1 << X86_FEATURE_MCA)  |  /* disable MCA */
 			    (1 << X86_FEATURE_ACC));   /* thermal monitoring */
 
 	asm(XEN_EMULATE_PREFIX "cpuid"


--
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Messages in current thread:
[PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 01 of 31] xen: fix RMW when unmasking events, Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 02 of 31] xen: fix UP setup of shared_info, Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 03 of 31] x86: convert pgalloc_64.h from macros to ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 04 of 31] x86: add common mm/pgtable.c, Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 05 of 31] x86: put paravirt stubs into common asm/p ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 06 of 31] x86: move pte functions into common asm/p ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 07 of 31] x86: move pmd functions into common asm/p ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 08 of 31] x86: move pgalloc pud and pgd operations ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:36 pm)
[PATCH 09 of 31] x86: move all the pgd_list handling to on ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 10 of 31] x86: rename paravirt_alloc_pt etc after t ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 11 of 31] x86: add pud_alloc for 4-level pagetables, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 12 of 31] x86/pgtable.h: demacro ptep_set_access_flags, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 13 of 31] x86/pgtable.h: demacro ptep_test_and_clea ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 14 of 31] x86/pgtable.h: demacro ptep_clear_flush_young, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 15 of 31] x86: demacro pgalloc paravirt stubs, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 16 of 31] xen: use appropriate pte types, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 17 of 31] xen: make use of pte_t union, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 18 of 31] xen: unify pte operations, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 19 of 31] xen: use phys_addr_t when referring to ph ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 20 of 31] xen: unify pte operations on machine frames, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 21 of 31] xen: make sure iret faults are trapped, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 22 of 31] x86: unify KERNEL_PGD_PTRS, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 23 of 31] x86: unify pgd ctor/dtor, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 24 of 31] xen: add support for callbackops hypercall, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 25 of 31] x86: only enable interrupts when kernel s ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 26 of 31] xen: support sysenter/sysexit if hypervis ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 27 of 31] xen: implement a debug-interrupt handler, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 28 of 31] xen: make sure retriggered events are set ..., Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 29 of 31] xen: short-cut for recursive event handling, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 30 of 31] xen: no need for domU to worry about MCE/MCA, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
[PATCH 31 of 31] xen: jump to iret fixup, Jeremy Fitzhardinge, (Mon Mar 17, 4:37 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Zachary Amsden, (Tue Mar 18, 2:33 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Tue Mar 18, 2:37 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ian Campbell, (Wed Mar 19, 2:22 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 8:11 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ian Campbell, (Wed Mar 19, 9:50 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 11:45 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 12:05 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 12:07 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 12:19 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 12:46 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 1:02 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 1:09 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 2:12 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 2:33 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 2:54 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 2:58 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 3:00 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 3:04 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Wed Mar 19, 3:15 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Wed Mar 19, 4:52 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Thu Mar 20, 1:24 pm)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Fri Mar 21, 6:17 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Fri Mar 21, 7:35 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Fri Mar 21, 8:15 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Ingo Molnar, (Fri Mar 21, 8:25 am)
Re: [PATCH 00 of 31] x86: unification and xen updates, Jeremy Fitzhardinge, (Fri Mar 21, 7:34 pm)