[PATCH v4 04/10] config/riscv: add qemu crossbuild target

[Daniel Gregory <code@danielg0.com>]

From: Daniel Gregory <daniel.gregory@bytedance.com>

A new cross-compilation target that has extensions that DPDK uses and
QEMU supports. This includes the vector extension V for ... and the Zbc
extension for hardware CRC support.

Signed-off-by: Daniel Gregory <daniel.gregory@bytedance.com>
---
 config/riscv/meson.build                        |  1 +
 config/riscv/riscv64_qemu_linux_gcc             | 17 +++++++++++++++++
 .../linux_gsg/cross_build_dpdk_for_riscv.rst    |  5 +++++
 3 files changed, 23 insertions(+)
 create mode 100644 config/riscv/riscv64_qemu_linux_gcc

diff --git a/config/riscv/meson.build b/config/riscv/meson.build
index 65ab4b7347..3580d71bf3 100644
--- a/config/riscv/meson.build
+++ b/config/riscv/meson.build
@@ -45,6 +45,7 @@ vendor_generic = {
     'arch_config': {
         'generic': {'machine_args': ['-march=rv64gc']},
         'rv64gcv': {'machine_args': ['-march=rv64gcv']},
+        'qemu': {'machine_args': ['-march=rv64gcv_zbc']},
     }
 }
 
diff --git a/config/riscv/riscv64_qemu_linux_gcc b/config/riscv/riscv64_qemu_linux_gcc
new file mode 100644
index 0000000000..f1298af8f0
--- /dev/null
+++ b/config/riscv/riscv64_qemu_linux_gcc
@@ -0,0 +1,17 @@
+[binaries]
+c = ['ccache', 'riscv64-linux-gnu-gcc']
+cpp = ['ccache', 'riscv64-linux-gnu-g++']
+ar = 'riscv64-linux-gnu-ar'
+strip = 'riscv64-linux-gnu-strip'
+pcap-config = ''
+
+[host_machine]
+system = 'linux'
+cpu_family = 'riscv64'
+cpu = 'rv64gcv_zbc'
+endian = 'little'
+
+[properties]
+vendor_id = 'generic'
+arch_id = 'qemu'
+pkg_config_libdir = '/usr/lib/riscv64-linux-gnu/pkgconfig'
diff --git a/doc/guides/linux_gsg/cross_build_dpdk_for_riscv.rst b/doc/guides/linux_gsg/cross_build_dpdk_for_riscv.rst
index bcba12a604..1767e7398c 100644
--- a/doc/guides/linux_gsg/cross_build_dpdk_for_riscv.rst
+++ b/doc/guides/linux_gsg/cross_build_dpdk_for_riscv.rst
@@ -112,6 +112,11 @@ Currently the following targets are supported:
 
 * SiFive U740 SoC: ``config/riscv/riscv64_sifive_u740_linux_gcc``
 
+* QEMU: ``config/riscv/riscv64_qemu_linux_gcc``
+
+  * A target with all the extensions that QEMU supports that DPDK has a use for
+    (currently ``rv64gcv_zbc``). Requires QEMU version 7.0.0 or newer.
+
 To add a new target support, ``config/riscv/meson.build`` has to be modified by
 adding a new vendor/architecture id and a corresponding cross-file has to be
 added to ``config/riscv`` directory.
-- 
2.53.0