linux/arch
Alexander Graf 10474ae894 KVM: Activate Virtualization On Demand
X86 CPUs need to have some magic happening to enable the virtualization
extensions on them. This magic can result in unpleasant results for
users, like blocking other VMMs from working (vmx) or using invalid TLB
entries (svm).

Currently KVM activates virtualization when the respective kernel module
is loaded. This blocks us from autoloading KVM modules without breaking
other VMMs.

To circumvent this problem at least a bit, this patch introduces on
demand activation of virtualization. This means, that instead
virtualization is enabled on creation of the first virtual machine
and disabled on destruction of the last one.

So using this, KVM can be easily autoloaded, while keeping other
hypervisors usable.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03 09:32:10 +02:00
..
alpha alpha: Fixup last users of irq_chip->typename 2009-11-30 22:51:31 -05:00
arm Merge branch 'mach-types' 2009-11-25 22:17:55 +00:00
avr32 at91: at91sam9g45 family: identify several chip versions 2009-11-03 18:42:31 +01:00
blackfin Blackfin: fix SMP build error in start_thread() 2009-11-25 02:38:01 -05:00
cris const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
frv frv: fix check on unsigned in do_signal() 2009-10-29 07:39:32 -07:00
h8300 h8300: Cleanup linker script using new linker script macros. 2009-09-24 17:16:22 -07:00
ia64 KVM: Activate Virtualization On Demand 2009-12-03 09:32:10 +02:00
m32r m32r: fix arch/m32r/boot/compressed/Makefile 2009-11-09 09:00:50 +09:00
m68k tty: Mark generic_serial users as BROKEN 2009-10-30 14:43:12 -07:00
m68knommu m68knommu: fix rename of pt_regs offset defines breakage 2009-09-30 10:06:07 +10:00
microblaze microblaze: Clear sticky FSR register after saving it to func parametr 2009-10-05 11:37:47 +02:00
mips MIPS: RB532: Fix devices.c compilation. 2009-12-02 18:09:51 +00:00
mn10300 mn10300: fix kernel build failures when using gcc-4.x 2009-10-01 16:11:12 -07:00
parisc parisc: fix unwind with recent gcc versions 2009-11-30 08:20:24 -08:00
powerpc KVM: Activate Virtualization On Demand 2009-12-03 09:32:10 +02:00
s390 KVM: Activate Virtualization On Demand 2009-12-03 09:32:10 +02:00
score Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next 2009-09-23 15:37:02 -07:00
sh sh: Fixup last users of irq_chip->typename 2009-11-18 10:50:22 +09:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6 2009-11-30 14:02:23 -08:00
um headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
x86 KVM: Activate Virtualization On Demand 2009-12-03 09:32:10 +02:00
xtensa headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
.gitignore
Kconfig core, x86: Add user return notifiers 2009-10-01 12:12:18 -07:00