mirror of https://gitee.com/openkylin/linux.git
cb171f7abb
Work around BIOSes that don't report the entire Intel MCH area. MCHBAR is not an architected PCI BAR, so MCH space is usually reported as a PNP0C02 resource. The MCH space was once 16KB, but is 32KB in newer parts. Some BIOSes still report a PNP0C02 resource that is only 16KB, which means the rest of the MCH space is consumed but unreported. This can cause resource map sanity check warnings or (theoretically) a device conflict if we assigned the unreported space to another device. The Intel perf event uncore driver tripped over this when it claimed the MCH region: resource map sanity check conflict: 0xfed10000 0xfed15fff 0xfed10000 0xfed13fff pnp 00:01 Info: mapping multiple BARs. Your kernel is fine. To prevent this, if we find a PNP0C02 resource that covers part of the MCH space, extend it to cover the entire space. References: http://lkml.kernel.org/r/20140224162400.GE16457@pd.tnic Reported-and-tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Borislav Petkov <bp@suse.de> Acked-by: Stephane Eranian <eranian@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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| .. | ||
| isapnp | ||
| pnpacpi | ||
| pnpbios | ||
| Kconfig | ||
| Makefile | ||
| base.h | ||
| card.c | ||
| core.c | ||
| driver.c | ||
| interface.c | ||
| manager.c | ||
| quirks.c | ||
| resource.c | ||
| support.c | ||
| system.c | ||