KVM: VMX: Don't intercept MSR_KERNEL_GS_BASE

Browse source

Windows 2008 accesses this MSR often on context switch intensive workloads;
since we run in guest context with the guest MSR value loaded (so swapgs can
work correctly), we can simply disable interception of rdmsr/wrmsr for this
MSR.

A complication occurs since in legacy mode, we run with the host MSR value
loaded. In this case we enable interception.  This means we need two MSR
bitmaps, one for legacy mode and one for long mode.

Signed-off-by: Avi Kivity <avi@redhat.com>

...

This commit is contained in:

Avi Kivity 2009-02-24 22:26:47 +02:00

parent 3e7c73e9b1

commit 5897297bc2

1 changed files with 43 additions and 14 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

57

arch/x86/kvm/vmx.c

View file