Re: [Qemu-devel] [PATCH 5/9] pc: PIIX DSDT: exclude CPU/PCI hotplug & GPE0 IO range from PCI bus resources

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Jan 09, 2014 at 11:34:05AM +0100, Igor Mammedov wrote:
> On Wed, 8 Jan 2014 19:00:55 +0200
> "Michael S. Tsirkin" <mst@redhat.com> wrote:
> 
> > On Sat, Dec 28, 2013 at 11:30:48PM +0100, Igor Mammedov wrote:
> > > .. so that they might not be used by PCI devices.
> > > 
> > > Note:
> > > Resort to concatenating templates with preprocessor help,
> > > because 1.0b spec isn't supporting ConcatenateResTemplate,
> > > as result Windows XP fails to execute PCI0._CRS method if
> > > ConcatenateResTemplate() is used.
> > > 
> > > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > 
> > Interesting. Could be worth getting rid of ConcatenateResTemplate in other places
> > too so XP works on more systems ...
> I guess they aren't used if there is no complains,

I think the workaround is simple - don't have so much memory,
that's why people don't complain.

> anyway it's topic for another time/patch.

Absolutely.

> > 
> > > ---
> > > Follow up patch will expose them as motherboard resources
> > > ---
> > >  hw/i386/acpi-dsdt-pci-crs.dsl |  8 +-------
> > >  hw/i386/acpi-dsdt.dsl         | 29 +++++++++++++++++++++++++++++
> > >  hw/i386/q35-acpi-dsdt.dsl     |  8 ++++++++
> > >  3 files changed, 38 insertions(+), 7 deletions(-)
> > > 
> > > diff --git a/hw/i386/acpi-dsdt-pci-crs.dsl b/hw/i386/acpi-dsdt-pci-crs.dsl
> > > index b375a19..8b631d1 100644
> > > --- a/hw/i386/acpi-dsdt-pci-crs.dsl
> > > +++ b/hw/i386/acpi-dsdt-pci-crs.dsl
> > > @@ -37,13 +37,7 @@ Scope(\_SB.PCI0) {
> > >              0x0000,             // Address Translation Offset
> > >              0x0CF8,             // Address Length
> > >              ,, , TypeStatic)
> > > -        WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
> > > -            0x0000,             // Address Space Granularity
> > > -            0x0D00,             // Address Range Minimum
> > > -            0xFFFF,             // Address Range Maximum
> > > -            0x0000,             // Address Translation Offset
> > > -            0xF300,             // Address Length
> > > -            ,, , TypeStatic)
> > > +        BOARD_SPECIFIC_PCI_RESOURSES
> > >          DWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed, Cacheable, ReadWrite,
> > >              0x00000000,         // Address Space Granularity
> > >              0x000A0000,         // Address Range Minimum
> > > diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
> > > index 3dc4789..55b4794 100644
> > > --- a/hw/i386/acpi-dsdt.dsl
> > > +++ b/hw/i386/acpi-dsdt.dsl
> > > @@ -35,6 +35,35 @@ DefinitionBlock (
> > >  /****************************************************************
> > >   * PCI Bus definition
> > >   ****************************************************************/
> > > +#define BOARD_SPECIFIC_PCI_RESOURSES \
> > > +     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
> > > +         0x0000, \
> > > +         0x0D00, \
> > > +         0xADFF, \
> > > +         0x0000, \
> > > +         0xA100, \
> > > +         ,, , TypeStatic) \
> > > +     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
> > > +         0x0000, \
> > > +         0xAE14, \
> > > +         0xAEFF, \
> > > +         0x0000, \
> > > +         0x00EC, \
> > > +         ,, , TypeStatic) \
> > > +     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
> > > +         0x0000, \
> > > +         0xAF20, \
> > > +         0xAFDF, \
> > > +         0x0000, \
> > > +         0x00C0, \
> > > +         ,, , TypeStatic) \
> > > +     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
> > > +         0x0000, \
> > > +         0xAFE4, \
> > > +         0xFFFF, \
> > > +         0x0000, \
> > > +         0x501C, \
> > > +         ,, , TypeStatic)
> > >  
> > >      Scope(\_SB) {
> > >          Device(PCI0) {
> > 
> > Could you add some comments here to document where
> > does each number comes from please?
> > E.g. /* PIIX4_PROC_BASE + 0x100 */ or something.
> done
> 
> > 
> > Ideally we'd generate this based on defines used
> > by host, but that does not have to block merging
> > this patch.
> > 
> > > diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
> > > index 9a43947..f3e5921 100644
> > > --- a/hw/i386/q35-acpi-dsdt.dsl
> > > +++ b/hw/i386/q35-acpi-dsdt.dsl
> > > @@ -48,6 +48,14 @@ DefinitionBlock (
> > >  /****************************************************************
> > >   * PCI Bus definition
> > >   ****************************************************************/
> > > +#define BOARD_SPECIFIC_PCI_RESOURSES \
> > > +     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
> > > +         0x0000, \
> > > +         0x0D00, \
> > > +         0xFFFF, \
> > > +         0x0000, \
> > > +         0xF300, \
> > > +         ,, , TypeStatic)
> > >  
> > >      Scope(\_SB) {
> > >          Device(PCI0) {
> > > -- 
> > > 1.8.4.2