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acpi: add ATSR for q35

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This patch provides ATSR which was a requirement for software that
wants to enable ATS on endpoint devices behind a Root Port. This is
done simply by setting ALL_PORTS which indicates all PCI-Express Root
Ports support ATS transactions.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2016-12-30 18:09:16 +08:00 • committed by Michael S. Tsirkin
parent 615c4ed205
commit bd2baaccd5
2 changed files with 21 additions and 0 deletions
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12
include/hw/acpi/acpi-defs.h
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@ -627,8 +627,20 @@ struct AcpiDmarHardwareUnit {
} QEMU_PACKED;
typedef struct AcpiDmarHardwareUnit AcpiDmarHardwareUnit;
/* Type 2: Root Port ATS Capability Reporting Structure */
struct AcpiDmarRootPortATS {
uint16_t type;
uint16_t length;
uint8_t flags;
uint8_t reserved;
uint16_t pci_segment;
AcpiDmarDeviceScope scope[0];
} QEMU_PACKED;
typedef struct AcpiDmarRootPortATS AcpiDmarRootPortATS;
/* Masks for Flags field above */
#define ACPI_DMAR_INCLUDE_PCI_ALL 1
#define ACPI_DMAR_ATSR_ALL_PORTS 1
/*
* Input Output Remapping Table (IORT)