[PATCH v2] docs: add supported host CPU architectures section

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

I was looking for such documentation, but couldn't find it. Add it to
the build-platform.rst document.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 docs/about/build-platforms.rst | 28 ++++++++++++++++++++++++++++
 meson.build                    |  2 +-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/docs/about/build-platforms.rst b/docs/about/build-platforms.rst
index 692323609e..518a19aff7 100644
--- a/docs/about/build-platforms.rst
+++ b/docs/about/build-platforms.rst
@@ -29,6 +29,34 @@ The `Repology`_ site is a useful resource to identify
 currently shipped versions of software in various operating systems,
 though it does not cover all distros listed below.
 
+Supported host architectures
+----------------------------
+
+Those hosts have a native TCG backend and are regularly tested:
+
+  .. list-table::
+   :header-rows: 1
+
+   * - CPU Architecture
+     - Accelerators
+   * - Arm
+     - kvm (64 bit only), xen
+   * - MIPS
+     - kvm
+   * - PPC
+     - kvm
+   * - RISC-V
+     -
+   * - s390x
+     - kvm
+   * - SPARC
+     -
+   * - x86
+     - kvm, xen, hax, hvf (64 bit only), nvmm, whpx (64 bit only)
+
+Other architectures are not actively maintained. They may be removed in future
+releases.
+
 Linux OS, macOS, FreeBSD, NetBSD, OpenBSD
 -----------------------------------------
 
diff --git a/meson.build b/meson.build
index 9a64d16943..27593c9b90 100644
--- a/meson.build
+++ b/meson.build
@@ -78,7 +78,7 @@ endif
 
 accelerator_targets = { 'CONFIG_KVM': kvm_targets }
 if cpu in ['x86', 'x86_64', 'arm', 'aarch64']
-  # i368 emulator provides xenpv machine type for multiple architectures
+  # i386 emulator provides xenpv machine type for multiple architectures
   accelerator_targets += {
     'CONFIG_XEN': ['i386-softmmu', 'x86_64-softmmu'],
   }
-- 
2.33.0.113.g6c40894d24