KVM: VMX: Implement PCID/INVPCID for guests with EPT
authorMao, Junjie <junjie.mao@intel.com>
Mon, 2 Jul 2012 01:18:48 +0000 (01:18 +0000)
committerAvi Kivity <avi@redhat.com>
Thu, 12 Jul 2012 10:07:34 +0000 (13:07 +0300)
commitad756a1603c5fac207758faaac7f01c34c9d0b7b
tree0b01513f1e3434362ab9faf8394cbd158b31386d
parentfc73373b33f5f965f2f82bfbc40ef8e6072e986d
KVM: VMX: Implement PCID/INVPCID for guests with EPT

This patch handles PCID/INVPCID for guests.

Process-context identifiers (PCIDs) are a facility by which a logical processor
may cache information for multiple linear-address spaces so that the processor
may retain cached information when software switches to a different linear
address space. Refer to section 4.10.1 in IA32 Intel Software Developer's Manual
Volume 3A for details.

For guests with EPT, the PCID feature is enabled and INVPCID behaves as running
natively.
For guests without EPT, the PCID feature is disabled and INVPCID triggers #UD.

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/include/asm/kvm_host.h
arch/x86/include/asm/processor-flags.h
arch/x86/include/asm/vmx.h
arch/x86/kvm/cpuid.c
arch/x86/kvm/cpuid.h
arch/x86/kvm/svm.c
arch/x86/kvm/vmx.c
arch/x86/kvm/x86.c