UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

KVM: VMX: cleanup rmode_segment_valid() 

Set segment fields explicitly instead of using  binary operations.

No behaviour changes.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Gleb Natapov 2012-12-12 19:10:49 +02:00
parent 116c14c019
commit 07f42f5f25
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kvm/vmx.c
View File

@ -3380,13 +3380,16 @@ static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
u32 ar;
vmx_get_segment(vcpu, &var, seg);
var.dpl = 0x3;
var.g = 0;
var.db = 0;
ar = vmx_segment_access_rights(&var);
if (var.base != (var.selector << 4))
return false;
if (var.limit < 0xffff)
return false;
if (((ar | (3 << AR_DPL_SHIFT)) & ~(AR_G_MASK | AR_DB_MASK)) != 0xf3)
if (ar != 0xf3)
return false;
return true;