diff options
| author | Matthew Garrett <mjg@redhat.com> | 2012-06-19 14:18:58 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-06-20 14:31:20 -0700 |
| commit | 7fbdda7f35592b3f4132999f5ffe87c4d7804049 (patch) | |
| tree | 980cde17dbc1ee4639edb9d0b915591e01041e6e /drivers/pci | |
| parent | afdea81a3395e0e7a85b0711d2a612f14d52d333 (diff) | |
PCI: pcie: Add support for setting default ASPM policy
Distributions may wish to provide different defaults for PCIE ASPM
depending on their target audience. Provide a configuration option for
choosing the default policy.
Bug 815499
(cherry picked from commit ad71c96213a68dfe6d761e3ff7ac7ac267fd612a
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;
a=commitdiff;h=ad71c96213a68dfe6d761e3ff7ac7ac267fd612a)
Change-Id: I36bd72517af0cf8d637552e66b18afe576e72c20
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-on: http://git-master/r/109739
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pcie/Kconfig | 25 | ||||
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 8 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/pci/pcie/Kconfig b/drivers/pci/pcie/Kconfig index dc29348264c6..c3706246a3b7 100644 --- a/drivers/pci/pcie/Kconfig +++ b/drivers/pci/pcie/Kconfig @@ -55,6 +55,31 @@ config PCIEASPM_DEBUG This enables PCI Express ASPM debug support. It will add per-device interface to control ASPM. +choice + prompt "Default ASPM policy" + default PCIEASPM_DEFAULT + depends on PCIEASPM + +config PCIEASPM_DEFAULT + bool "BIOS default" + depends on PCIEASPM + help + Use the BIOS defaults for PCI Express ASPM. + +config PCIEASPM_POWERSAVE + bool "Powersave" + depends on PCIEASPM + help + Enable PCI Express ASPM L0s and L1 where possible, even if the + BIOS did not. + +config PCIEASPM_PERFORMANCE + bool "Performance" + depends on PCIEASPM + help + Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them. +endchoice + config PCIE_PME def_bool y depends on PCIEPORTBUS && PM_RUNTIME && EXPERIMENTAL && ACPI diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index cbfbab18be91..d65b56893506 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -76,7 +76,15 @@ static LIST_HEAD(link_list); #define POLICY_DEFAULT 0 /* BIOS default setting */ #define POLICY_PERFORMANCE 1 /* high performance */ #define POLICY_POWERSAVE 2 /* high power saving */ + +#ifdef CONFIG_PCIEASPM_PERFORMANCE +static int aspm_policy = POLICY_PERFORMANCE; +#elif defined CONFIG_PCIEASPM_POWERSAVE +static int aspm_policy = POLICY_POWERSAVE; +#else static int aspm_policy; +#endif + static const char *policy_str[] = { [POLICY_DEFAULT] = "default", [POLICY_PERFORMANCE] = "performance", |