From 92efb1bd9bcbdf83cc0e6cfead752d0c82f63677 Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Mon, 16 May 2016 15:12:02 -0500 Subject: [PATCH] PCI: Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs Resource flags are exposed to userspace via the sysfs "resource" file. lspci reads the sysfs file to determine resource properties. Add a "BAR Equivalent Indicator" flag so lspci can distinguish between [virtual] and [enhanced] resources. Signed-off-by: Alex Williamson Signed-off-by: Sean O. Stalley Signed-off-by: Bjorn Helgaas --- drivers/pci/pci.c | 2 +- include/linux/ioport.h | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 25e0327..7b008c7 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2228,7 +2228,7 @@ void pci_pm_init(struct pci_dev *dev) static unsigned long pci_ea_flags(struct pci_dev *dev, u8 prop) { - unsigned long flags = IORESOURCE_PCI_FIXED; + unsigned long flags = IORESOURCE_PCI_FIXED | IORESOURCE_PCI_EA_BEI; switch (prop) { case PCI_EA_P_MEM: diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 0b65543..6230064 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -26,6 +26,9 @@ struct resource { /* * IO resources have these defined flags. + * + * PCI devices expose these flags to userspace in the "resource" sysfs file, + * so don't move them. */ #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ @@ -110,6 +113,7 @@ struct resource { /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ +#define IORESOURCE_PCI_EA_BEI (1<<5) /* BAR Equivalent Indicator */ /* * I/O Resource Descriptors -- 2.7.4