linux/arch/x86/kvm/vmx
Sean Christopherson 491c1ad1ac KVM: VMX: Optimize vmx_set_rflags() for unrestricted guest
Rework vmx_set_rflags() to avoid the extra code need to handle emulation
of real mode and invalid state when unrestricted guest is disabled.  The
primary reason for doing so is to avoid the call to vmx_get_rflags(),
which will incur a VMREAD when RFLAGS is not already available.  When
running nested VMs, the majority of calls to vmx_set_rflags() will occur
without an associated vmx_get_rflags(), i.e. when stuffing GUEST_RFLAGS
during transitions between vmcs01 and vmcs02.

Note, vmx_get_rflags() guarantees RFLAGS is marked available.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
[Replace "else" with early "return" in the unrestricted guest branch. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-10-22 13:34:12 +02:00
..
capabilities.h KVM: x86: Add support for user wait instructions 2019-09-24 14:34:20 +02:00
evmcs.c x86/kvm/nVMX: fix VMCLEAR when Enlightened VMCS is in use 2019-07-02 18:56:00 +02:00
evmcs.h KVM/Hyper-V/VMX: Add direct tlb flush support 2019-09-24 13:37:14 +02:00
nested.c KVM: nVMX: Always write vmcs02.GUEST_CR3 during nested VM-Enter 2019-10-22 13:34:07 +02:00
nested.h KVM: nVMX: Use descriptive names for VMCS sync functions and flags 2019-06-18 11:46:06 +02:00
ops.h KVM: VMX: Add error handling to VMREAD helper 2019-09-25 15:30:09 +02:00
pmu_intel.c kvm: vmx: Limit guest PMCs to those supported on the host 2019-10-01 15:15:06 +02:00
vmcs12.c
vmcs12.h KVM/arm updates for 5.3 2019-07-11 15:14:16 +02:00
vmcs_shadow_fields.h KVM: nVMX: shadow pin based execution controls 2019-06-18 17:10:50 +02:00
vmcs.h KVM: VMX: Leave preemption timer running when it's disabled 2019-06-18 17:10:46 +02:00
vmenter.S KVM: VMX: Fix and tweak the comments for VM-Enter 2019-08-22 10:09:27 +02:00
vmx.c KVM: VMX: Optimize vmx_set_rflags() for unrestricted guest 2019-10-22 13:34:12 +02:00
vmx.h KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL 2019-09-24 14:34:36 +02:00