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