Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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 <alex.williamson@redhat.com>
Signed-off-by: default avatarSean O. Stalley <sean.stalley@intel.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent c20e1280

drivers/pci/pci.c

+1 −1
Original line number Diff line number Diff line
@@ -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:

include/linux/ioport.h

+4 −0
Original line number Diff line number Diff line
@@ -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