From fd50b7c3d75bd3889cfa1f16e7b93c7ed1a3451c Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Fri, 2 Mar 2018 14:47:11 -0800 Subject: soc/intel: Fix MCFG end bus number The ACPI MCFG table is generated with a static end bus number of 255, which expects that the reserved range in E820 is 256MB. However the actual MCFG range is configurable with Kconfig, so these two values may not match when the OS tries to determine the range: PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000) PCI: MMCONFIG 0000 [bus 00-3f] at [mem 0xe0000000-0xe3ffffff] (base 0xe0000000) (size reduced!) acpi PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge Instead of forcing the end bus number to be 255 use the Kconfig value to set it based on the current configuration. Tested on a fizz device to ensure that the kernel no longer complains: PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xe0000000-0xe3ffffff] (base 0xe0000000) Change-Id: I999ea9b72b9deba5f27dd692faa0408427a0bf89 Signed-off-by: Duncan Laurie Reviewed-on: https://review.coreboot.org/24974 Reviewed-by: Paul Menzel Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) --- src/soc/intel/common/block/acpi/acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/soc/intel/common/block') diff --git a/src/soc/intel/common/block/acpi/acpi.c b/src/soc/intel/common/block/acpi/acpi.c index 3db96a030d..bf4003d575 100644 --- a/src/soc/intel/common/block/acpi/acpi.c +++ b/src/soc/intel/common/block/acpi/acpi.c @@ -36,7 +36,7 @@ unsigned long acpi_fill_mcfg(unsigned long current) /* PCI Segment Group 0, Start Bus Number 0, End Bus Number is 255 */ current += acpi_create_mcfg_mmconfig((void *)current, CONFIG_MMCONF_BASE_ADDRESS, 0, 0, - 255); + (CONFIG_SA_PCIEX_LENGTH >> 20) - 1); return current; } -- cgit v1.2.3