diff options
| author | Jason Wang <jasowang@redhat.com> | 2016-12-30 18:09:16 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-01-10 05:56:59 +0200 |
| commit | bd2baaccd521a9cfcc56e0a9a69c903fcee56aa4 (patch) | |
| tree | f2d5d67e42589bd55683f554f785d56e8266ae86 /hw/i386/acpi-build.c | |
| parent | 615c4ed20598ab3eda5e071ba7ba2a5bf70be59f (diff) | |
acpi: add ATSR for q35
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>
Diffstat (limited to 'hw/i386/acpi-build.c')
| -rw-r--r-- | hw/i386/acpi-build.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 42ecf619d5..4609db1359 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -2575,6 +2575,7 @@ build_dmar_q35(GArray *table_data, BIOSLinker *linker) AcpiTableDmar *dmar; AcpiDmarHardwareUnit *drhd; + AcpiDmarRootPortATS *atsr; uint8_t dmar_flags = 0; X86IOMMUState *iommu = x86_iommu_get_default(); AcpiDmarDeviceScope *scope = NULL; @@ -2608,6 +2609,14 @@ build_dmar_q35(GArray *table_data, BIOSLinker *linker) scope->path[0].device = PCI_SLOT(Q35_PSEUDO_DEVFN_IOAPIC); scope->path[0].function = PCI_FUNC(Q35_PSEUDO_DEVFN_IOAPIC); + if (iommu->dt_supported) { + atsr = acpi_data_push(table_data, sizeof(*atsr)); + atsr->type = cpu_to_le16(ACPI_DMAR_TYPE_ATSR); + atsr->length = cpu_to_le16(sizeof(*atsr)); + atsr->flags = ACPI_DMAR_ATSR_ALL_PORTS; + atsr->pci_segment = cpu_to_le16(0); + } + build_header(linker, table_data, (void *)(table_data->data + dmar_start), "DMAR", table_data->len - dmar_start, 1, NULL, NULL); } |