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| author | Matthew Garrett <mjg@redhat.com> | 2012-02-03 16:18:13 +0100 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-02-17 18:22:03 +0100 |
| commit | ad71c96213a68dfe6d761e3ff7ac7ac267fd612a (patch) | |
| tree | e1586751c7249035c128de60a5721aafa997e2d5 | |
| parent | PCI: Add quirk for still enabled interrupts on Intel Sandy Bridge GPUs (diff) | |
| download | linux-ad71c96213a68dfe6d761e3ff7ac7ac267fd612a.tar.xz linux-ad71c96213a68dfe6d761e3ff7ac7ac267fd612a.zip | |
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.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -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 72962cc92e0a..6c8bc5809787 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 1cfbf228fbb1..a0de5e123046 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", |