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Re: [Qemu-devel] [RFC 8/9] pcihp: expose PCI hotplug MMIO base/length as
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [RFC 8/9] pcihp: expose PCI hotplug MMIO base/length as properties of piix4pm |
Date: |
Sun, 16 Feb 2014 17:45:09 +0200 |
On Fri, Feb 07, 2014 at 01:51:35PM +0100, Igor Mammedov wrote:
> with introduction of PCIHP, MMIO range becomes changable
> at runtime so it's not possible to statically punch hole
> PCI bus _CRS.
>
> Making IO base/length available as readonly properties
> allow acpi builder to get values and reserve PCI hotplug
> IO range at runtime later.
>
> Signed-off-by: Igor Mammedov <address@hidden>
No objection but I wonder: isn't it already possible to enumerate
memory regions?
> ---
> hw/acpi/pcihp.c | 28 ++++++++++++++++++++++++++++
> hw/acpi/piix4.c | 1 +
> include/hw/acpi/pcihp.h | 4 ++++
> 3 files changed, 33 insertions(+), 0 deletions(-)
>
> diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
> index 1ce6fc2..629d364 100644
> --- a/hw/acpi/pcihp.c
> +++ b/hw/acpi/pcihp.c
> @@ -37,6 +37,7 @@
> #include "hw/pci/pci_bus.h"
> #include "qom/qom-qobject.h"
> #include "qapi/qmp/qint.h"
> +#include "qapi/visitor.h"
>
> //#define DEBUG
>
> @@ -309,3 +310,30 @@ const VMStateDescription vmstate_acpi_pcihp_pci_status =
> {
> VMSTATE_END_OF_LIST()
> }
> };
> +
> +static void acpi_pcihp_get_io_addr(Object *obj, Visitor *v, void *opaque,
> + const char *name, Error **errp)
> +{
> + AcpiPciHpState *s = opaque;
> + MemoryRegionSection mr_info = memory_region_find(&s->io, 0, 1);
> + uint16_t value = mr_info.offset_within_address_space;
> +
> + visit_type_uint16(v, &value, name, errp);
> +}
> +
> +static void acpi_pcihp_get_io_len(Object *obj, Visitor *v, void *opaque,
> + const char *name, Error **errp)
> +{
> + AcpiPciHpState *s = opaque;
> + uint16_t value = memory_region_size(&s->io);
> +
> + visit_type_uint16(v, &value, name, errp);
> +}
> +
> +void acpi_pcihp_add_mmio_properties(Object *obj, AcpiPciHpState *s)
> +{
> + object_property_add(obj, ACPI_PCIHP_IO_ADDR, "uint16",
> + acpi_pcihp_get_io_addr, NULL, NULL, s, NULL);
> + object_property_add(obj, ACPI_PCIHP_IO_LEN, "uint16",
> + acpi_pcihp_get_io_len, NULL, NULL, s, NULL);
> +}
> diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
> index 7a0efcb..034c5cd 100644
> --- a/hw/acpi/piix4.c
> +++ b/hw/acpi/piix4.c
> @@ -558,6 +558,7 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion
> *parent,
> "acpi-gpe0", GPE_LEN);
> memory_region_add_subregion(parent, GPE_BASE, &s->io_gpe);
>
> + acpi_pcihp_add_mmio_properties(OBJECT(s), &s->acpi_pci_hotplug);
> acpi_pcihp_init(&s->acpi_pci_hotplug, bus, parent,
> s->use_acpi_pci_hotplug);
>
> diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h
> index 0a90e4a..0eb4e1c 100644
> --- a/include/hw/acpi/pcihp.h
> +++ b/include/hw/acpi/pcihp.h
> @@ -70,4 +70,8 @@ extern const VMStateDescription
> vmstate_acpi_pcihp_pci_status;
> vmstate_acpi_pcihp_pci_status, \
> AcpiPciHpPciStatus)
>
> +#define ACPI_PCIHP_IO_ADDR "pcihp-io-addr"
> +#define ACPI_PCIHP_IO_LEN "pcihp-io-len"
> +
> +void acpi_pcihp_add_mmio_properties(Object *obj, AcpiPciHpState *s);
> #endif
> --
> 1.7.1
- [Qemu-devel] [RFC 3/9] Partial revert "pc: ACPI: expose PRST IO range via _CRS", (continued)
- [Qemu-devel] [RFC 3/9] Partial revert "pc: ACPI: expose PRST IO range via _CRS", Igor Mammedov, 2014/02/07
- [Qemu-devel] [RFC 4/9] acpi: replace opencoded opcodes with defines, Igor Mammedov, 2014/02/07
- [Qemu-devel] [RFC 5/9] acpi: add PNP0C02 to PCI0 bus, Igor Mammedov, 2014/02/07
- [Qemu-devel] [RFC 6/9] acpi: consume GPE0 IO resources in PNP0C02 device, Igor Mammedov, 2014/02/07
- [Qemu-devel] [RFC 7/9] acpi: consume CPU hotplug IO resource in PNP0C02 device, Igor Mammedov, 2014/02/07
- [Qemu-devel] [RFC 8/9] pcihp: expose PCI hotplug MMIO base/length as properties of piix4pm, Igor Mammedov, 2014/02/07
- Re: [Qemu-devel] [RFC 8/9] pcihp: expose PCI hotplug MMIO base/length as properties of piix4pm,
Michael S. Tsirkin <=
- [Qemu-devel] [RFC 9/9] acpi: consume PCIHP IO resource in PNP0C02 device, Igor Mammedov, 2014/02/07
- Re: [Qemu-devel] [RFC 0/9] generate dynamic _CRS for motherboard resources, Michael S. Tsirkin, 2014/02/16
- Re: [Qemu-devel] [RFC 0/9] generate dynamic _CRS for motherboard resources, Igor Mammedov, 2014/02/18
- Re: [Qemu-devel] [RFC 0/9] generate dynamic _CRS for motherboard resources, Laszlo Ersek, 2014/02/18
- Re: [Qemu-devel] [RFC 0/9] generate dynamic _CRS for motherboard resources, Igor Mammedov, 2014/02/19
Re: [Qemu-devel] [RFC 0/9] generate dynamic _CRS for motherboard resources, Igor Mammedov, 2014/02/17