forked from KolibriOS/kolibrios
r4619
git-svn-id: svn://kolibrios.org@4619 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -821,8 +821,11 @@ endp
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; Let's hope he would report it to developers...
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proc mtrr_validate
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; 1. If MTRRs are not supported, they cannot be configured improperly.
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bt [cpu_caps], CAPS_MTRR
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jnc .exit
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; Note: VirtualBox claims MTRR support in cpuid, but emulates MTRRCAP=0,
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; which is efficiently equivalent to absent MTRRs.
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; So check [num_variable_mtrrs] instead of CAPS_MTRR in [cpu_caps].
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cmp [num_variable_mtrrs], 0
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jz .exit
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; 2. If variable-range MTRRs are not configured, this is a problem.
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mov ecx, 0x2FF
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rdmsr
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