Merge tag 'for_upstream' of git://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: fixes,cleanups,features

most of CXL support
fixes, cleanups all over the place

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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* tag 'for_upstream' of git://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (86 commits)
  vhost-user-scsi: avoid unlink(NULL) with fd passing
  virtio-net: don't handle mq request in userspace handler for vhost-vdpa
  vhost-vdpa: change name and polarity for vhost_vdpa_one_time_request()
  vhost-vdpa: backend feature should set only once
  vhost-net: fix improper cleanup in vhost_net_start
  vhost-vdpa: fix improper cleanup in net_init_vhost_vdpa
  virtio-net: align ctrl_vq index for non-mq guest for vhost_vdpa
  virtio-net: setup vhost_dev and notifiers for cvq only when feature is negotiated
  hw/i386/amd_iommu: Fix IOMMU event log encoding errors
  hw/i386: Make pic a property of common x86 base machine type
  hw/i386: Make pit a property of common x86 base machine type
  include/hw/pci/pcie_host: Correct PCIE_MMCFG_SIZE_MAX
  include/hw/pci/pcie_host: Correct PCIE_MMCFG_BUS_MASK
  docs/vhost-user: Clarifications for VHOST_USER_ADD/REM_MEM_REG
  vhost-user: more master/slave things
  virtio: add vhost support for virtio devices
  virtio: drop name parameter for virtio_init()
  virtio/vhost-user: dynamically assign VhostUserHostNotifiers
  hw/virtio/vhost-user: don't suppress F_CONFIG when supported
  include/hw: start documenting the vhost API
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/qemu-options.hx b/qemu-options.hx
index 60d2d728d6..b484640067 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -467,6 +467,44 @@ SRST
         -numa hmat-cache,node-id=1,size=10K,level=1,associativity=direct,policy=write-back,line=8
 ERST
 
+DEF("cxl-fixed-memory-window", HAS_ARG, QEMU_OPTION_cxl_fixed_memory_window,
+    "-cxl-fixed-memory-window targets.0=firsttarget,targets.1=secondtarget,size=size[,interleave-granularity=granularity]\n",
+    QEMU_ARCH_ALL)
+SRST
+``-cxl-fixed-memory-window targets.0=firsttarget,targets.1=secondtarget,size=size[,interleave-granularity=granularity]``
+    Define a CXL Fixed Memory Window (CFMW).
+
+    Described in the CXL 2.0 ECN: CEDT CFMWS & QTG _DSM.
+
+    They are regions of Host Physical Addresses (HPA) on a system which
+    may be interleaved across one or more CXL host bridges.  The system
+    software will assign particular devices into these windows and
+    configure the downstream Host-managed Device Memory (HDM) decoders
+    in root ports, switch ports and devices appropriately to meet the
+    interleave requirements before enabling the memory devices.
+
+    ``targets.X=firsttarget`` provides the mapping to CXL host bridges
+    which may be identified by the id provied in the -device entry.
+    Multiple entries are needed to specify all the targets when
+    the fixed memory window represents interleaved memory. X is the
+    target index from 0.
+
+    ``size=size`` sets the size of the CFMW. This must be a multiple of
+    256MiB. The region will be aligned to 256MiB but the location is
+    platform and configuration dependent.
+
+    ``interleave-granularity=granularity`` sets the granularity of
+    interleave. Default 256KiB. Only 256KiB, 512KiB, 1024KiB, 2048KiB
+    4096KiB, 8192KiB and 16384KiB granularities supported.
+
+    Example:
+
+    ::
+
+        -cxl-fixed-memory-window targets.0=cxl.0,targets.1=cxl.1,size=128G,interleave-granularity=512k
+
+ERST
+
 DEF("add-fd", HAS_ARG, QEMU_OPTION_add_fd,
     "-add-fd fd=fd,set=set[,opaque=opaque]\n"
     "                Add 'fd' to fd 'set'\n", QEMU_ARCH_ALL)