On 05/01/2018 16:43, Paolo Bonzini wrote: > KVM has a small optimization where it doesn't save/restore > MSR_KERNEL_GS_BASE if the guest is in 32-bit mode. However, > this complicates the code noticeably by doubling the number of > possible MSR bitmaps. In addition, pt_disable_intercept_for_msr > was only updating the "basic" MSR bitmap, because x2apic and > x2apic_apicv are memcpy'd just once in hardware_setup. > > Remove the long-mode bitmaps set, and touch all the three remaining > bitmaps in vmx_disable_intercept_for_msr and vmx_enable_intercept_for_msr. > > Fixes: 3bd1f85e893daec4f3982d1d45b6bfc0683442c4 > Cc: Luwei Kang <luwei.kang@xxxxxxxxx> > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> > --- > arch/x86/kvm/vmx.c | 126 ++++++++++++++++++++--------------------------------- > 1 file changed, 48 insertions(+), 78 deletions(-) Scratch it, this patch is wrong. You cannot change the MSR bitmaps, they are shared across all VCPUs. Paolo
