| commit | 99d09dd32820f5702031e3c08c81f8c209dc2220 | |
| author | Igor Mammedov <imammedo@redhat.com> | |
| Mon, 3 Feb 2014 10:44:59 +0000 (3 11:44 +0100) | ||
| committer | Michael S. Tsirkin <mst@redhat.com> | |
| Wed, 5 Feb 2014 14:55:49 +0000 (5 16:55 +0200) | ||
| tree | fdc0505a6f922b9cf8a614ad552eadc05a1f2080 | treesnapshot (tar.gz zip) |
| parent | a7b613cf68b65d04ef2b1b601bb18f31e8ca0c11 | commitdiff |
pcihp: make pci_read() mmio calback compatible with legacy ACPI hotplug
due to recent change introduced by:
"pcihp: reduce number of device check events"
'up' field is cleared right after it's read.
This is incompatible with legacy BIOS ACPI code
where PCNF ACPI method reads this field 32 times.
To make pci_read mmio callback compatible with legacy
'up' behavior, pcihp code will need to know in which
mode it runs add 'legacy_piix' field to AcpiPciHpState
structure and alter register behavior accordingly.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
due to recent change introduced by:
"pcihp: reduce number of device check events"
'up' field is cleared right after it's read.
This is incompatible with legacy BIOS ACPI code
where PCNF ACPI method reads this field 32 times.
To make pci_read mmio callback compatible with legacy
'up' behavior, pcihp code will need to know in which
mode it runs add 'legacy_piix' field to AcpiPciHpState
structure and alter register behavior accordingly.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| hw/acpi/pcihp.c | diffblobblamehistory | |
| hw/acpi/piix4.c | diffblobblamehistory | |
| include/hw/acpi/pcihp.h | diffblobblamehistory |