diff options
| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2015-11-23 10:32:57 +0000 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-12-21 14:40:54 +0000 |
| commit | 02c2433b3aa6b57313c261c9811bbbe49528101c (patch) | |
| tree | 8081453d55ffc7b54560cd99e069a9890ee7ea68 /arch/arm/Kconfig | |
| parent | 1fe7c4ef88bd32e039f5f4126537c3f20c340414 (diff) | |
arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
Introduce CONFIG_PARAVIRT and PARAVIRT_TIME_ACCOUNTING on ARM.
The only paravirt interface supported is pv_time_ops.steal_clock, so no
runtime pvops patching needed.
This allows us to make use of steal_account_process_tick for stolen
ticks accounting.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Christopher Covington <cov@codeaurora.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Russell King <linux@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 34e1569a11ee..1ab9b98d4c6c 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1800,6 +1800,25 @@ config SWIOTLB config IOMMU_HELPER def_bool SWIOTLB +config PARAVIRT + bool "Enable paravirtualization code" + help + This changes the kernel so it can modify itself when it is run + under a hypervisor, potentially improving performance significantly + over full virtualization. + +config PARAVIRT_TIME_ACCOUNTING + bool "Paravirtual steal time accounting" + select PARAVIRT + default n + help + Select this option to enable fine granularity task steal time + accounting. Time spent executing other tasks in parallel with + the current vCPU is discounted from the vCPU power. To account for + that, there can be a small performance impact. + + If in doubt, say N here. + config XEN_DOM0 def_bool y depends on XEN @@ -1813,6 +1832,7 @@ config XEN select ARCH_DMA_ADDR_T_64BIT select ARM_PSCI select SWIOTLB_XEN + select PARAVIRT help Say Y if you want to run Linux in a Virtual Machine on Xen on ARM. |