From 5a2223ca26b1a34e131b5b9a63599d9426d2c25c Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Sun, 26 Jan 2014 12:31:27 +0200 Subject: pcihp: reduce number of device check events PIIX created a made-up value for the UP register since it was read by guest 32 times for each interrupt. There's no reason to do this for the new PCIHP: register is only read once for each interrupt, so clean up code by making read act as an interrupt acknowledgement: the new UP register clear on read. In this way we cut down the number of bus rescans by a factor of 32, and drop a bunch of code that's now unused. Signed-off-by: Michael S. Tsirkin --- include/hw/acpi/pcihp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/hw') diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h index 6230e60954..aa297c2450 100644 --- a/include/hw/acpi/pcihp.h +++ b/include/hw/acpi/pcihp.h @@ -32,7 +32,7 @@ #include "hw/pci/pci.h" /* for PCIHotplugState */ typedef struct AcpiPciHpPciStatus { - uint32_t up; /* deprecated, maintained for migration compatibility */ + uint32_t up; uint32_t down; uint32_t hotplug_enable; uint32_t device_present; -- cgit 1.4.1