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| author | Thomas Gleixner <tglx@linutronix.de> | 2024-09-10 14:49:53 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-09-10 14:49:53 +0300 |
| commit | 2f7eedca6cecbfad52d5b52c1550066d9252c947 (patch) | |
| tree | ffce8be3ceee2c845a951d11b99578ca468639a4 /arch/x86/include/asm/qspinlock.h | |
| parent | bd7c8ff9fef4b21a97f9b30a7364845ee6eaaf23 (diff) | |
| parent | da3ea35007d0af457a0afc87e84fddaebc4e0b63 (diff) | |
| download | linux-2f7eedca6cecbfad52d5b52c1550066d9252c947.tar.xz | |
Merge branch 'linus' into timers/core
To update with the latest fixes.
Diffstat (limited to 'arch/x86/include/asm/qspinlock.h')
| -rw-r--r-- | arch/x86/include/asm/qspinlock.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h index a053c1293975..68da67df304d 100644 --- a/arch/x86/include/asm/qspinlock.h +++ b/arch/x86/include/asm/qspinlock.h @@ -66,13 +66,15 @@ static inline bool vcpu_is_preempted(long cpu) #ifdef CONFIG_PARAVIRT /* - * virt_spin_lock_key - enables (by default) the virt_spin_lock() hijack. + * virt_spin_lock_key - disables by default the virt_spin_lock() hijack. * - * Native (and PV wanting native due to vCPU pinning) should disable this key. - * It is done in this backwards fashion to only have a single direction change, - * which removes ordering between native_pv_spin_init() and HV setup. + * Native (and PV wanting native due to vCPU pinning) should keep this key + * disabled. Native does not touch the key. + * + * When in a guest then native_pv_lock_init() enables the key first and + * KVM/XEN might conditionally disable it later in the boot process again. */ -DECLARE_STATIC_KEY_TRUE(virt_spin_lock_key); +DECLARE_STATIC_KEY_FALSE(virt_spin_lock_key); /* * Shortcut for the queued_spin_lock_slowpath() function that allows |