tree 6b277abdcd5c8801a1c29c849cda0011e9b77c9b
parent 6a49f85c7ac83c1918d138d40492a5cef40b5ff8
author Xiao Guangrong <guangrong.xiao@linux.intel.com> 1431499339 +0800
committer Paolo Bonzini <pbonzini@redhat.com> 1432061562 +0200

KVM: MMU: fix decoding cache type from MTRR

There are some bugs in current get_mtrr_type();
1: bit 1 of mtrr_state->enabled is corresponding bit 11 of
   IA32_MTRR_DEF_TYPE MSR which completely control MTRR's enablement
   that means other bits are ignored if it is cleared

2: the fixed MTRR ranges are controlled by bit 0 of
   mtrr_state->enabled (bit 10 of IA32_MTRR_DEF_TYPE)

3: if MTRR is disabled, UC is applied to all of physical memory rather
   than mtrr_state->def_type

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>