diff options
| -rw-r--r-- | arch/x86/entry/entry_64.S | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/spec-ctrl.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/bugs.c | 5 |
3 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index afb805b0148b..6b505d91cac5 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -218,6 +218,8 @@ entry_SYSCALL_64_fastpath: testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) jnz int_ret_from_sys_call_irqs_off /* Go to the slow path */ + call mds_user_clear_buffers + movq RIP(%rsp), %rcx movq EFLAGS(%rsp), %r11 RESTORE_C_REGS_EXCEPT_RCX_R11 diff --git a/arch/x86/include/asm/spec-ctrl.h b/arch/x86/include/asm/spec-ctrl.h index 5393babc0598..4a7acb4adc6b 100644 --- a/arch/x86/include/asm/spec-ctrl.h +++ b/arch/x86/include/asm/spec-ctrl.h @@ -85,4 +85,6 @@ static inline void speculative_store_bypass_ht_init(void) { } extern void speculation_ctrl_update(unsigned long tif); extern void speculation_ctrl_update_current(void); +extern void mds_user_clear_buffers(void); + #endif diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index e9aa50ba4f97..950e6bb21955 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -263,6 +263,11 @@ static int __init mds_cmdline(char *str) } early_param("mds", mds_cmdline); +void mds_user_clear_buffers(void) +{ + mds_user_clear_cpu_buffers(); +} + #undef pr_fmt #define pr_fmt(fmt) "TAA: " fmt |