projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 453eafbe SC |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #include <linux/linkage.h> | |
| 3 | #include <asm/asm.h> | |
| 4 | ||
| 5 | .text | |
| 6 | ||
| 7 | /** | |
| 8 | * vmx_vmenter - VM-Enter the current loaded VMCS | |
| 9 | * | |
| 10 | * %RFLAGS.ZF: !VMCS.LAUNCHED, i.e. controls VMLAUNCH vs. VMRESUME | |
| 11 | * | |
| 12 | * Returns: | |
| 13 | * %RFLAGS.CF is set on VM-Fail Invalid | |
| 14 | * %RFLAGS.ZF is set on VM-Fail Valid | |
| 15 | * %RFLAGS.{CF,ZF} are cleared on VM-Success, i.e. VM-Exit | |
| 16 | * | |
| 17 | * Note that VMRESUME/VMLAUNCH fall-through and return directly if | |
| 18 | * they VM-Fail, whereas a successful VM-Enter + VM-Exit will jump | |
| 19 | * to vmx_vmexit. | |
| 20 | */ | |
| 21 | ENTRY(vmx_vmenter) | |
| 22 | /* EFLAGS.ZF is set if VMCS.LAUNCHED == 0 */ | |
| 23 | je 2f | |
| 24 | ||
| 25 | 1: vmresume | |
| 26 | ret | |
| 27 | ||
| 28 | 2: vmlaunch | |
| 29 | ret | |
| 30 | ||
| 31 | 3: cmpb $0, kvm_rebooting | |
| 32 | jne 4f | |
| 33 | call kvm_spurious_fault | |
| 34 | 4: ret | |
| 35 | ||
| 36 | .pushsection .fixup, "ax" | |
| 37 | 5: jmp 3b | |
| 38 | .popsection | |
| 39 | ||
| 40 | _ASM_EXTABLE(1b, 5b) | |
| 41 | _ASM_EXTABLE(2b, 5b) | |
| 42 | ||
| 43 | ENDPROC(vmx_vmenter) | |
| 44 | ||
| 45 | /** | |
| 46 | * vmx_vmexit - Handle a VMX VM-Exit | |
| 47 | * | |
| 48 | * Returns: | |
| 49 | * %RFLAGS.{CF,ZF} are cleared on VM-Success, i.e. VM-Exit | |
| 50 | * | |
| 51 | * This is vmx_vmenter's partner in crime. On a VM-Exit, control will jump | |
| 52 | * here after hardware loads the host's state, i.e. this is the destination | |
| 53 | * referred to by VMCS.HOST_RIP. | |
| 54 | */ | |
| 55 | ENTRY(vmx_vmexit) | |
| 56 | ret | |
| 57 | ENDPROC(vmx_vmexit) |