diff options
Diffstat (limited to 'drivers/ptp/Kconfig')
| -rw-r--r-- | drivers/ptp/Kconfig | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig index 604541dcb320..07bf7f9aae01 100644 --- a/drivers/ptp/Kconfig +++ b/drivers/ptp/Kconfig @@ -131,6 +131,23 @@ config PTP_1588_CLOCK_KVM To compile this driver as a module, choose M here: the module will be called ptp_kvm. +config PTP_1588_CLOCK_VMCLOCK + tristate "Virtual machine PTP clock" + depends on X86_TSC || ARM_ARCH_TIMER + depends on PTP_1588_CLOCK && ACPI && ARCH_SUPPORTS_INT128 + default PTP_1588_CLOCK_KVM + help + This driver adds support for using a virtual precision clock + advertised by the hypervisor. This clock is only useful in virtual + machines where such a device is present. + + Unlike the KVM virtual PTP clock, the VMCLOCK device offers support + for reliable timekeeping even across live migration. So this driver + is enabled by default whenever the KVM PTP clock is. + + To compile this driver as a module, choose M here: the module + will be called ptp_vmclock. + config PTP_1588_CLOCK_IDT82P33 tristate "IDT 82P33xxx PTP clock" depends on PTP_1588_CLOCK && I2C @@ -224,4 +241,15 @@ config PTP_DFL_TOD To compile this driver as a module, choose M here: the module will be called ptp_dfl_tod. +config PTP_S390 + tristate "S390 PTP driver" + depends on PTP_1588_CLOCK + depends on S390 + help + This driver adds support for S390 time steering via the PtP + interface. This works by adding a in-kernel clock delta value, + which is always added to time values used in the kernel. The PtP + driver provides the raw clock value without the delta to + userspace. That way userspace programs like chrony could steer + the kernel clock. endmenu |