Commit 92efb1bd authored by Alex Williamson's avatar Alex Williamson Committed by Bjorn Helgaas

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: default avatarAlex Williamson <>
Signed-off-by: default avatarSean O. Stalley <>
Signed-off-by: default avatarBjorn Helgaas <>
parent c20e1280
......@@ -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;
switch (prop) {
case PCI_EA_P_MEM:
......@@ -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
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