diff options
| author | Chegu Vinod <chegu_vinod@hp.com> | 2013-04-28 03:31:04 +0200 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-28 12:17:48 +0200 |
| commit | cbf64358588ae45dcf0207dbc97fba783577d64a (patch) | |
| tree | 569dc33d28fe0f275847d1e5f1343bd045a27c31 /arch/x86 | |
| parent | kvm: Allow build-time configuration of KVM device assignment (diff) | |
| download | linux-cbf64358588ae45dcf0207dbc97fba783577d64a.tar.xz linux-cbf64358588ae45dcf0207dbc97fba783577d64a.zip | |
KVM: x86: Increase the "hard" max VCPU limit
KVM guests today use 8bit APIC ids allowing for 256 ID's. Reserving one
ID for Broadcast interrupts should leave 255 ID's. In case of KVM there
is no need for reserving another ID for IO-APIC so the hard max limit for
VCPUS can be increased from 254 to 255. (This was confirmed by Gleb Natapov
http://article.gmane.org/gmane.comp.emulators.kvm.devel/99713 )
Signed-off-by: Chegu Vinod <chegu_vinod@hp.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 38f2cc0a5a23..ec14b7245a4e 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -31,7 +31,7 @@ #include <asm/msr-index.h> #include <asm/asm.h> -#define KVM_MAX_VCPUS 254 +#define KVM_MAX_VCPUS 255 #define KVM_SOFT_MAX_VCPUS 160 #define KVM_USER_MEM_SLOTS 125 /* memory slots that are not exposed to userspace */ |