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hv: check vmx unrestricted guest capability

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Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Xu, Anthony <anthony.xu@intel.com>
This commit is contained in:
Binbin Wu 2018-05-22 13:59:06 +08:00 committed by lijinxia
parent 37db817c03
commit 417cff5049
2 changed files with 12 additions and 1 deletions
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5
hypervisor/arch/x86/cpu.c
View File

@ -211,6 +211,11 @@ static int hardware_detect_support(void)
return -ENODEV;
}
if (!cpu_has_vmx_unrestricted_guest_cap()) {
pr_fatal("%s, unrestricted guest not supported\n", __func__);
return -ENODEV;
}
ret = check_vmx_mmu_cap();
if (ret)
return ret;

8
hypervisor/include/arch/x86/vmx.h
View File

@ -390,6 +390,8 @@
/* CR4 bits hv want to trap to track status change */
#define CR4_TRAP_MASK (CR4_PSE | CR4_PAE)
#define VMX_SUPPORT_UNRESTRICTED_GUEST (1<<5)
/* External Interfaces */
int exec_vmxon_instr(void);
uint64_t exec_vmread(uint32_t field);
@ -410,11 +412,15 @@ static inline uint8_t get_vcpu_mode(struct vcpu *vcpu)
return vcpu->arch_vcpu.cpu_mode;
}
static inline bool cpu_has_vmx_unrestricted_guest_cap(void)
{
return !!(msr_read(MSR_IA32_VMX_MISC) & VMX_SUPPORT_UNRESTRICTED_GUEST);
}
typedef struct _descriptor_table_{
uint16_t limit;
uint64_t base;
}__attribute__((packed)) descriptor_table;
#endif /* ASSEMBLER */
#endif /* VMX_H_ */