diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-05-28 16:13:52 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-18 15:47:01 +0200 |
| commit | 6758034e4d6a7f0e26b748789ab1f83f3116d1b9 (patch) | |
| tree | fcaaccf48964fa4f0a63bf54ccb1b9ec3d902fd7 /arch/x86/include/asm/processor.h | |
| parent | 58edfd2e0a93c9adc2f29902a0335af0584041a0 (diff) | |
x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
save_fsgs_for_kvm() is invoked via
vcpu_enter_guest()
kvm_x86_ops.prepare_guest_switch(vcpu)
vmx_prepare_switch_to_guest()
save_fsgs_for_kvm()
with preemption disabled, but interrupts enabled.
The upcoming FSGSBASE based GS safe needs interrupts to be disabled. This
could be done in the helper function, but that function is also called from
switch_to() which has interrupts disabled already.
Disable interrupts inside save_fsgs_for_kvm() and rename the function to
current_save_fsgs() so it can be invoked from other places.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200528201402.1708239-7-sashal@kernel.org
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index f66202d6121a..7c2ecdf7e064 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -457,10 +457,8 @@ static inline unsigned long cpu_kernelmode_gs_base(int cpu) DECLARE_PER_CPU(unsigned int, irq_count); extern asmlinkage void ignore_sysret(void); -#if IS_ENABLED(CONFIG_KVM) /* Save actual FS/GS selectors and bases to current->thread */ -void save_fsgs_for_kvm(void); -#endif +void current_save_fsgs(void); #else /* X86_64 */ #ifdef CONFIG_STACKPROTECTOR /* |