KVM: x86: Fully defer to vendor code to decide how to force immediate exit

Browse source

Now that vmx->req_immediate_exit is used only in the scope of
vmx_vcpu_run(), use force_immediate_exit to detect that KVM should usurp
the VMX preemption to force a VM-Exit and let vendor code fully handle
forcing a VM-Exit.

Opportunsitically drop __kvm_request_immediate_exit() and just have
vendor code call smp_send_reschedule() directly.  SVM already does this
when injecting an event while also trying to single-step an IRET, i.e.
it's not exactly secret knowledge that KVM uses a reschedule IPI to force
an exit.

Link: https://lore.kernel.org/r/20240110012705.506918-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Sean Christopherson 2024-01-09 17:27:05 -08:00

parent 7b3d1bbf8d

commit 0ec3d6d1f1

6 changed files with 19 additions and 36 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/x86/include/asm/kvm-x86-ops.h

View file

3

arch/x86/include/asm/kvm_host.h

View file

7

arch/x86/kvm/svm/svm.c

View file

32

arch/x86/kvm/vmx/vmx.c

View file

2

arch/x86/kvm/vmx/vmx.h

View file

10

arch/x86/kvm/x86.c

View file