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authorMichael S. Tsirkin <mst@redhat.com>2014-01-26 12:31:27 +0200
committerMichael S. Tsirkin <mst@redhat.com>2014-02-05 16:55:49 +0200
commit5a2223ca26b1a34e131b5b9a63599d9426d2c25c (patch)
tree7d5c543c94afdaab0cc4e3abef828bb4ac51fe99 /include
parent2b2449f7e467957778ca006904471b231dc0ac8e (diff)
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 <mst@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/hw/acpi/pcihp.h2
1 files changed, 1 insertions, 1 deletions
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;