kernel_optimize_test/arch
Konrad Rzeszutek Wilk 6efa20e49b xen: Support 64-bit PV guest receiving NMIs
This is based on a patch that Zhenzhong Duan had sent - which
was missing some of the remaining pieces. The kernel has the
logic to handle Xen-type-exceptions using the paravirt interface
in the assembler code (see PARAVIRT_ADJUST_EXCEPTION_FRAME -
pv_irq_ops.adjust_exception_frame and and INTERRUPT_RETURN -
pv_cpu_ops.iret).

That means the nmi handler (and other exception handlers) use
the hypervisor iret.

The other changes that would be neccessary for this would
be to translate the NMI_VECTOR to one of the entries on the
ipi_vector and make xen_send_IPI_mask_allbutself use different
events.

Fortunately for us commit 1db01b4903
(xen: Clean up apic ipi interface) implemented this and we piggyback
on the cleanup such that the apic IPI interface will pass the right
vector value for NMI.

With this patch we can trigger NMIs within a PV guest (only tested
x86_64).

For this to work with normal PV guests (not initial domain)
we need the domain to be able to use the APIC ops - they are
already implemented to use the Xen event channels. For that
to be turned on in a PV domU we need to remove the masking
of X86_FEATURE_APIC.

Incidentally that means kgdb will also now work within
a PV guest without using the 'nokgdbroundup' workaround.

Note that the 32-bit version is different and this patch
does not enable that.

CC: Lisa Nguyen <lisa@xenapiadmin.com>
CC: Ben Guthro <benjamin.guthro@citrix.com>
CC: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
[v1: Fixed up per David Vrabel comments]
Reviewed-by: Ben Guthro <benjamin.guthro@citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
2013-08-09 10:55:47 -04:00
..
alpha alpha: Use handle_percpu_irq for the timer interrupt 2013-07-19 13:54:26 -07:00
arc ARC: SMP build breakage 2013-07-26 15:34:22 -07:00
arm Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-08-03 11:12:09 -07:00
arm64 arm64: Change kernel stack size to 16K 2013-07-26 13:37:29 +01:00
avr32 net: rename busy poll socket op and globals 2013-07-10 17:08:27 -07:00
blackfin Merge branch 'cpuinit_phase2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2013-07-18 10:50:26 -07:00
c6x
cris cris: delete __cpuinit usage from all cris files 2013-07-14 19:36:54 -04:00
frv frv: delete __cpuinit usage from all frv files 2013-07-14 19:36:55 -04:00
h8300 net: rename busy poll socket op and globals 2013-07-10 17:08:27 -07:00
hexagon hexagon: delete __cpuinit usage from all hexagon files 2013-07-14 19:36:55 -04:00
ia64 PCI: hotplug: Convert to be builtin only, not modular 2013-07-25 14:11:06 -06:00
m32r m32r: delete __cpuinit usage from all m32r files 2013-07-14 19:36:55 -04:00
m68k
metag metag: delete __cpuinit usage from all metag files 2013-07-14 19:36:54 -04:00
microblaze Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze 2013-07-10 10:16:07 -07:00
mips MIPS: BMIPS: fix slave CPU booting when physical CPU is not 0 2013-07-30 18:54:29 +02:00
mn10300 net: rename busy poll socket op and globals 2013-07-10 17:08:27 -07:00
openrisc openrisc: delete __cpuinit usage from all openrisc files 2013-07-14 19:36:55 -04:00
parisc parisc: Fix interrupt routing for C8000 serial ports 2013-07-31 23:42:32 +02:00
powerpc Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-08-02 14:39:49 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-07-19 15:08:12 -07:00
score score: delete __cpuinit usage from all score files 2013-07-14 19:36:56 -04:00
sh PCI: hotplug: Convert to be builtin only, not modular 2013-07-25 14:11:06 -06:00
sparc sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
tile tile: delete __cpuinit usage from all tile files 2013-07-14 19:36:54 -04:00
um um: siginfo cleanup 2013-07-19 11:31:36 +02:00
unicore32
x86 xen: Support 64-bit PV guest receiving NMIs 2013-08-09 10:55:47 -04:00
xtensa xtensa: delete __cpuinit usage from all xtensa files 2013-07-14 19:36:56 -04:00
.gitignore
Kconfig