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hv: mmu: add some API for guest page mode check

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add is_long_mode to check whether the processor is operating in IA-32e mode
add is_paging_enabled to check whether paging is enabled
add is_pae to check whether physical address extension is enabled.

Tracked-On: #1379
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1
2018-09-29 14:08:51 +08:00
committed by wenlingz
parent 9fd8781242
commit 2b24b3780f
4 changed files with 20 additions and 5 deletions
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4
hypervisor/arch/x86/guest/guest.c
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@@ -59,10 +59,10 @@ enum vm_paging_mode get_vcpu_paging_mode(struct vcpu *vcpu)
return PAGING_MODE_0_LEVEL;
}
else if (cpu_mode == CPU_MODE_PROTECTED) {
if ((vcpu_get_cr4(vcpu) & CR4_PAE) != 0U) {
if (is_pae(vcpu)) {
return PAGING_MODE_3_LEVEL;
}
else if ((vcpu_get_cr0(vcpu) & CR0_PG) != 0U) {
else if (is_paging_enabled(vcpu)) {
return PAGING_MODE_2_LEVEL;
}
return PAGING_MODE_0_LEVEL;