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/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/linkage.h>
#include <asm/asm.h>
.text
/**
* vmx_vmenter - VM-Enter the current loaded VMCS
*
* %RFLAGS.ZF: !VMCS.LAUNCHED, i.e. controls VMLAUNCH vs. VMRESUME
*
* Returns:
* %RFLAGS.CF is set on VM-Fail Invalid
* %RFLAGS.ZF is set on VM-Fail Valid
* %RFLAGS.{CF,ZF} are cleared on VM-Success, i.e. VM-Exit
*
* Note that VMRESUME/VMLAUNCH fall-through and return directly if
* they VM-Fail, whereas a successful VM-Enter + VM-Exit will jump
* to vmx_vmexit.
*/
ENTRY(vmx_vmenter)
/* EFLAGS.ZF is set if VMCS.LAUNCHED == 0 */
je 2f
1: vmresume
ret
2: vmlaunch
ret
3: cmpb $0, kvm_rebooting
jne 4f
call kvm_spurious_fault
4: ret
.pushsection .fixup, "ax"
5: jmp 3b
.popsection
_ASM_EXTABLE(1b, 5b)
_ASM_EXTABLE(2b, 5b)
ENDPROC(vmx_vmenter)
/**
* vmx_vmexit - Handle a VMX VM-Exit
*
* Returns:
* %RFLAGS.{CF,ZF} are cleared on VM-Success, i.e. VM-Exit
*
* This is vmx_vmenter's partner in crime. On a VM-Exit, control will jump
* here after hardware loads the host's state, i.e. this is the destination
* referred to by VMCS.HOST_RIP.
*/
ENTRY(vmx_vmexit)
ret
ENDPROC(vmx_vmexit)
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