On Sun, Mar 18, 2012 at 07:06:23PM +0200, Michael S. Tsirkin wrote:
> acpi currently clears up/down registers on each hotplug
> request. This loses events if they are done quickly.
> It's easy to clear down on ej write.
> To detect that guest was notified of device addition,
> we track configuration accesses since system reset.
>
This is hack. This is not how real HW works, why do we needed it?
If up/down thing is so broken that this is required lets move to how
cpu hot-plug works and maintain slot status bit map instead. BTW
we discussed that with Alex last week. Have you followed that thread.
> Michael S. Tsirkin (2):
> pci: track function accesses
> acpi: don't clear up/down on each host change
>
> hw/acpi_piix4.c | 32 +++++++++++++++++++++++++++-----
> hw/pci.c | 26 ++++++++++++++++++++++++++
> hw/pci.h | 3 +++
> hw/pci_host.c | 2 ++
> 4 files changed, 58 insertions(+), 5 deletions(-)
>
> --
> 1.7.9.111.gf3fb0
--
Gleb.
