PVH PCIe Passthrough for NVIDIA (#127)

* patches-nvidia: add patch to allow no INTx support for Xen

Signed-off-by: Steven Noonan <steven@edera.dev>

* zone kernel: add CMA support for NVIDIA, strip out unnecessary drivers from base zone kernel

Signed-off-by: Steven Noonan <steven@edera.dev>

* patches-nvidia: remove patch which breaks PVH domUs

PVH uses vPCI and this patch broke the PMA allocator, preventing CUDA
workloads from working.

Signed-off-by: Steven Noonan <steven@edera.dev>

* nvidia: create workload overlay with driver binaries

Signed-off-by: Steven Noonan <steven@edera.dev>

* add missing NVIDIA DRI, GLX, GBM drivers to workload overlay

Signed-off-by: Steven Noonan <steven@edera.dev>

* symlink-mirror our installed NVIDIA libs into the Debian multiarch path

Signed-off-by: Steven Noonan <steven@edera.dev>

* fix merge conflicts

---------

Signed-off-by: Steven Noonan <steven@edera.dev>
Co-authored-by: Steven Noonan <steven@edera.dev>

Author: azenla

configs/x86_64/zone-nvidiagpu.fragment.config

@@ -30,3 +30,14 @@ CONFIG_DRM_NOUVEAU=n
 CONFIG_ACPI_WMI=y
 CONFIG_WMI_BMOF=y
 CONFIG_MXM_WMI=y
+
+CONFIG_CMA=y
+CONFIG_CMA_DEBUGFS=y
+CONFIG_CMA_SYSFS=y
+CONFIG_CMA_AREAS=8
+CONFIG_DMA_CMA=y
+CONFIG_DMA_NUMA_CMA=y
+
+CONFIG_CMA_SIZE_MBYTES=0
+CONFIG_CMA_SIZE_SEL_MBYTES=y
+CONFIG_CMA_ALIGNMENT=8