|
 |
b38b0f |
From a0d3bac749cccf262986923b1b4f4e565472cfd8 Mon Sep 17 00:00:00 2001
|
|
|
b38b0f |
From: David Gibson <dgibson@redhat.com>
|
|
|
b38b0f |
Date: Thu, 30 May 2019 04:37:24 +0100
|
|
|
b38b0f |
Subject: [PATCH 3/8] linux-headers: Update for NVLink2 passthrough [downstream
|
|
|
b38b0f |
only]
|
|
|
b38b0f |
MIME-Version: 1.0
|
|
|
b38b0f |
Content-Type: text/plain; charset=UTF-8
|
|
|
b38b0f |
Content-Transfer-Encoding: 8bit
|
|
|
b38b0f |
|
|
|
b38b0f |
RH-Author: David Gibson <dgibson@redhat.com>
|
|
|
b38b0f |
Message-id: <20190530043728.32575-3-dgibson@redhat.com>
|
|
|
b38b0f |
Patchwork-id: 88424
|
|
|
b38b0f |
O-Subject: [RHEL-8.1 qemu-kvm PATCH 2/6] linux-headers: Update for NVLink2 passthrough [downstream only]
|
|
|
b38b0f |
Bugzilla: 1710662
|
|
|
b38b0f |
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
|
|
|
b38b0f |
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
b38b0f |
RH-Acked-by: Auger Eric <eric.auger@redhat.com>
|
|
|
b38b0f |
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
|
|
|
b38b0f |
|
|
|
b38b0f |
From: David Gibson <david@gibson.dropbear.id.au>
|
|
|
b38b0f |
|
|
|
b38b0f |
Update with the necessary pieces for vfio passthrough of NVLink2
|
|
|
b38b0f |
devices. Not a full header update, just pieces, since that's the
|
|
|
b38b0f |
convention downwstream.
|
|
|
b38b0f |
|
|
|
b38b0f |
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1710662
|
|
|
b38b0f |
|
|
|
b38b0f |
Signed-off-by: David Gibson <dgibson@redhat.com>
|
|
|
b38b0f |
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
|
b38b0f |
---
|
|
|
b38b0f |
linux-headers/linux/vfio.h | 42 ++++++++++++++++++++++++++++++++++++++++++
|
|
|
b38b0f |
1 file changed, 42 insertions(+)
|
|
|
b38b0f |
|
|
|
b38b0f |
diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h
|
|
|
b38b0f |
index 25c7b7d..12b23e5 100644
|
|
|
b38b0f |
--- a/linux-headers/linux/vfio.h
|
|
|
b38b0f |
+++ b/linux-headers/linux/vfio.h
|
|
|
b38b0f |
@@ -304,6 +304,21 @@ struct vfio_region_info_cap_type {
|
|
|
b38b0f |
#define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3)
|
|
|
b38b0f |
|
|
|
b38b0f |
/*
|
|
|
b38b0f |
+ * 10de vendor sub-type
|
|
|
b38b0f |
+ *
|
|
|
b38b0f |
+ * NVIDIA GPU NVlink2 RAM is coherent RAM mapped onto the host address space.
|
|
|
b38b0f |
+ */
|
|
|
b38b0f |
+#define VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM (1)
|
|
|
b38b0f |
+
|
|
|
b38b0f |
+/*
|
|
|
b38b0f |
+ * 1014 vendor sub-type
|
|
|
b38b0f |
+ *
|
|
|
b38b0f |
+ * IBM NPU NVlink2 ATSD (Address Translation Shootdown) register of NPU
|
|
|
b38b0f |
+ * to do TLB invalidation on a GPU.
|
|
|
b38b0f |
+ */
|
|
|
b38b0f |
+#define VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD (1)
|
|
|
b38b0f |
+
|
|
|
b38b0f |
+/*
|
|
|
b38b0f |
* The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
|
|
|
b38b0f |
* which allows direct access to non-MSIX registers which happened to be within
|
|
|
b38b0f |
* the same system page.
|
|
|
b38b0f |
@@ -313,6 +328,33 @@ struct vfio_region_info_cap_type {
|
|
|
b38b0f |
*/
|
|
|
b38b0f |
#define VFIO_REGION_INFO_CAP_MSIX_MAPPABLE 3
|
|
|
b38b0f |
|
|
|
b38b0f |
+/*
|
|
|
b38b0f |
+ * Capability with compressed real address (aka SSA - small system address)
|
|
|
b38b0f |
+ * where GPU RAM is mapped on a system bus. Used by a GPU for DMA routing
|
|
|
b38b0f |
+ * and by the userspace to associate a NVLink bridge with a GPU.
|
|
|
b38b0f |
+ */
|
|
|
b38b0f |
+#define VFIO_REGION_INFO_CAP_NVLINK2_SSATGT 4
|
|
|
b38b0f |
+
|
|
|
b38b0f |
+struct vfio_region_info_cap_nvlink2_ssatgt {
|
|
|
b38b0f |
+ struct vfio_info_cap_header header;
|
|
|
b38b0f |
+ __u64 tgt;
|
|
|
b38b0f |
+};
|
|
|
b38b0f |
+
|
|
|
b38b0f |
+/*
|
|
|
b38b0f |
+ * Capability with an NVLink link speed. The value is read by
|
|
|
b38b0f |
+ * the NVlink2 bridge driver from the bridge's "ibm,nvlink-speed"
|
|
|
b38b0f |
+ * property in the device tree. The value is fixed in the hardware
|
|
|
b38b0f |
+ * and failing to provide the correct value results in the link
|
|
|
b38b0f |
+ * not working with no indication from the driver why.
|
|
|
b38b0f |
+ */
|
|
|
b38b0f |
+#define VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD 5
|
|
|
b38b0f |
+
|
|
|
b38b0f |
+struct vfio_region_info_cap_nvlink2_lnkspd {
|
|
|
b38b0f |
+ struct vfio_info_cap_header header;
|
|
|
b38b0f |
+ __u32 link_speed;
|
|
|
b38b0f |
+ __u32 __pad;
|
|
|
b38b0f |
+};
|
|
|
b38b0f |
+
|
|
|
b38b0f |
/**
|
|
|
b38b0f |
* VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
|
|
|
b38b0f |
* struct vfio_irq_info)
|
|
|
b38b0f |
--
|
|
|
b38b0f |
1.8.3.1
|
|
|
b38b0f |
|