From: Andi Kleen Date: Tue, 26 Sep 2006 08:52:40 +0000 (+0200) Subject: [PATCH] i386/x86-64: Only do MCFG e820 check when type 1 works X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9abd79280bbb9f56049f0168f412c3538cadb6eb;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git [PATCH] i386/x86-64: Only do MCFG e820 check when type 1 works Needs earlier patch to split type 1 probing from use. This patch should fix the x86 macs where type 1 PCI config space access doesn't work, but MCFG does. They also don't have a usable e820 table so the e820 sanity check failed. Instead assume now that if type 1 doesn't work then MCFG must work and don't do the e820 check. Signed-off-by: Andi Kleen --- diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c index 44155c5e85d1..2c4f585510c9 100644 --- a/arch/i386/pci/mmconfig.c +++ b/arch/i386/pci/mmconfig.c @@ -198,7 +198,9 @@ void __init pci_mmcfg_init(int type) (pci_mmcfg_config[0].base_address == 0)) return; - if (!e820_all_mapped(pci_mmcfg_config[0].base_address, + /* Only do this check when type 1 works. If it doesn't work + assume we run on a Mac and always use MCFG */ + if (type == 1 && !e820_all_mapped(pci_mmcfg_config[0].base_address, pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN, E820_RESERVED)) { printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n", diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c index d6b90d08476b..8bea51030d66 100644 --- a/arch/x86_64/pci/mmconfig.c +++ b/arch/x86_64/pci/mmconfig.c @@ -176,7 +176,9 @@ void __init pci_mmcfg_init(int type) (pci_mmcfg_config[0].base_address == 0)) return; - if (!e820_all_mapped(pci_mmcfg_config[0].base_address, + /* Only do this check when type 1 works. If it doesn't work + assume we run on a Mac and always use MCFG */ + if (type == 1 && !e820_all_mapped(pci_mmcfg_config[0].base_address, pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN, E820_RESERVED)) { printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",