| vmenter.S (a23e1966932464e1c5226cb9ac4ce1d5fc10ba22) | vmenter.S (4440337af4d415c8abf8b9b0e10c79b7518e6e3c) |
|---|---|
| 1/* SPDX-License-Identifier: GPL-2.0 */ 2#include <linux/linkage.h> 3#include <asm/asm.h> 4#include <asm/asm-offsets.h> 5#include <asm/bitsperlong.h> 6#include <asm/frame.h> 7#include <asm/kvm_vcpu_regs.h> 8#include <asm/nospec-branch.h> --- 195 unchanged lines hidden (view full) --- 2045: vmsave %_ASM_AX 2056: 206 207 /* Restores GSBASE among other things, allowing access to percpu data. */ 208 pop %_ASM_AX 2097: vmload %_ASM_AX 2108: 211 | 1/* SPDX-License-Identifier: GPL-2.0 */ 2#include <linux/linkage.h> 3#include <asm/asm.h> 4#include <asm/asm-offsets.h> 5#include <asm/bitsperlong.h> 6#include <asm/frame.h> 7#include <asm/kvm_vcpu_regs.h> 8#include <asm/nospec-branch.h> --- 195 unchanged lines hidden (view full) --- 2045: vmsave %_ASM_AX 2056: 206 207 /* Restores GSBASE among other things, allowing access to percpu data. */ 208 pop %_ASM_AX 2097: vmload %_ASM_AX 2108: 211 |
| 212#ifdef CONFIG_MITIGATION_RETPOLINE | |
| 213 /* IMPORTANT: Stuff the RSB immediately after VM-Exit, before RET! */ | 212 /* IMPORTANT: Stuff the RSB immediately after VM-Exit, before RET! */ |
| 214 FILL_RETURN_BUFFER %_ASM_AX, RSB_CLEAR_LOOPS, X86_FEATURE_RETPOLINE 215#endif | 213 FILL_RETURN_BUFFER %_ASM_AX, RSB_CLEAR_LOOPS, X86_FEATURE_RSB_VMEXIT |
| 216 217 /* Clobbers RAX, RCX, RDX. */ 218 RESTORE_HOST_SPEC_CTRL 219 220 /* 221 * Mitigate RETBleed for AMD/Hygon Zen uarch. RET should be 222 * untrained as soon as we exit the VM and are back to the 223 * kernel. This should be done before re-enabling interrupts --- 119 unchanged lines hidden (view full) --- 343 344 /* Enter guest mode */ 345 sti 346 3471: vmrun %rax 348 3492: cli 350 | 214 215 /* Clobbers RAX, RCX, RDX. */ 216 RESTORE_HOST_SPEC_CTRL 217 218 /* 219 * Mitigate RETBleed for AMD/Hygon Zen uarch. RET should be 220 * untrained as soon as we exit the VM and are back to the 221 * kernel. This should be done before re-enabling interrupts --- 119 unchanged lines hidden (view full) --- 341 342 /* Enter guest mode */ 343 sti 344 3451: vmrun %rax 346 3472: cli 348 |
| 351#ifdef CONFIG_MITIGATION_RETPOLINE | |
| 352 /* IMPORTANT: Stuff the RSB immediately after VM-Exit, before RET! */ | 349 /* IMPORTANT: Stuff the RSB immediately after VM-Exit, before RET! */ |
| 353 FILL_RETURN_BUFFER %rax, RSB_CLEAR_LOOPS, X86_FEATURE_RETPOLINE 354#endif | 350 FILL_RETURN_BUFFER %rax, RSB_CLEAR_LOOPS, X86_FEATURE_RSB_VMEXIT |
| 355 356 /* Clobbers RAX, RCX, RDX, consumes RDI (@svm) and RSI (@spec_ctrl_intercepted). */ 357 RESTORE_HOST_SPEC_CTRL 358 359 /* 360 * Mitigate RETBleed for AMD/Hygon Zen uarch. RET should be 361 * untrained as soon as we exit the VM and are back to the 362 * kernel. This should be done before re-enabling interrupts --- 19 unchanged lines hidden --- | 351 352 /* Clobbers RAX, RCX, RDX, consumes RDI (@svm) and RSI (@spec_ctrl_intercepted). */ 353 RESTORE_HOST_SPEC_CTRL 354 355 /* 356 * Mitigate RETBleed for AMD/Hygon Zen uarch. RET should be 357 * untrained as soon as we exit the VM and are back to the 358 * kernel. This should be done before re-enabling interrupts --- 19 unchanged lines hidden --- |