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Commit 6aa07a0d authored by Eduardo Habkost's avatar Eduardo Habkost Committed by Avi Kivity
Browse files

x86: cpu_emergency_vmxoff() function 



Add cpu_emergency_vmxoff() and its friends: cpu_vmx_enabled() and
__cpu_emergency_vmxoff().

Signed-off-by: default avatarEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 710ff4a8

arch/x86/include/asm/virtext.h

+23 −0
Original line number Original line Diff line number Diff line
@@ -43,4 +43,27 @@ static inline void cpu_vmxoff(void) 
	write_cr4(read_cr4() & ~X86_CR4_VMXE);

	write_cr4(read_cr4() & ~X86_CR4_VMXE);

}

}





static inline int cpu_vmx_enabled(void)

{

	return read_cr4() & X86_CR4_VMXE;

}



/** Disable VMX if it is enabled on the current CPU

 *

 * You shouldn't call this if cpu_has_vmx() returns 0.

 */

static inline void __cpu_emergency_vmxoff(void)

{

	if (cpu_vmx_enabled())

		cpu_vmxoff();

}



/** Disable VMX if it is supported and enabled on the current CPU

 */

static inline void cpu_emergency_vmxoff(void)

{

	if (cpu_has_vmx())

		__cpu_emergency_vmxoff();

}



#endif /* _ASM_X86_VIRTEX_H */
 
#endif /* _ASM_X86_VIRTEX_H */