From: xianglai li <lixianglai@xxxxxxxxxxx>
Add loongarch cpu support, Define new cpu type 'loongarch64'
and implement it's driver functions.
Signed-off-by: "Xianglai Li" <lixianglai@xxxxxxxxxxx>
---
src/cpu/cpu.c | 2 +
src/cpu/cpu_loongarch.c | 80 ++++++++++++++++++++++++++++++++++++
src/cpu/cpu_loongarch.h | 25 +++++++++++
src/cpu/meson.build | 1 +
src/qemu/qemu_capabilities.c | 2 +
src/qemu/qemu_domain.c | 4 ++
src/util/virarch.c | 2 +
src/util/virarch.h | 4 ++
8 files changed, 120 insertions(+)
create mode 100644 src/cpu/cpu_loongarch.c
create mode 100644 src/cpu/cpu_loongarch.h
diff --git a/src/cpu/cpu.c b/src/cpu/cpu.c
index bc43aa4e93..1e7c879ca5 100644
--- a/src/cpu/cpu.c
+++ b/src/cpu/cpu.c
@@ -27,6 +27,7 @@
#include "cpu_ppc64.h"
#include "cpu_s390.h"
#include "cpu_arm.h"
+#include "cpu_loongarch.h"
#include "cpu_riscv64.h"
#include "capabilities.h"
@@ -41,6 +42,7 @@ static struct cpuArchDriver *drivers[] = {
&cpuDriverS390,
&cpuDriverArm,
&cpuDriverRiscv64,
+ &cpuDriverLoongArch,
};
diff --git a/src/cpu/cpu_loongarch.c b/src/cpu/cpu_loongarch.c
new file mode 100644
index 0000000000..48f9fef5ea
--- /dev/null
+++ b/src/cpu/cpu_loongarch.c
@@ -0,0 +1,80 @@
+/*
+ * cpu_loongarch.c: CPU driver for 64-bit LOONGARCH CPUs
+ *
+ * Copyright (C) 2024 Loongson Technology.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "virlog.h"
+#include "viralloc.h"
+#include "cpu.h"
+#include "virstring.h"
+#include "cpu_map.h"
+#include "virbuffer.h"
+
+#define VIR_FROM_THIS VIR_FROM_CPU
+
+VIR_LOG_INIT("cpu.cpu_loongarch");
+
+static const virArch archs[] = { VIR_ARCH_LOONGARCH64 };
+
+static virCPUCompareResult
+virCPULoongArchCompare(virCPUDef *host G_GNUC_UNUSED,
+ virCPUDef *cpu G_GNUC_UNUSED,
+ bool failIncompatible G_GNUC_UNUSED)
+{
+ return VIR_CPU_COMPARE_IDENTICAL;
+}
+
+static int
+virCPULoongArchUpdate(virCPUDef *guest,
+ const virCPUDef *host ATTRIBUTE_UNUSED,
+ bool relative G_GNUC_UNUSED)
+{
+ /*
+ * - host-passthrough doesn't even get here
+ * - host-model is used for host CPU running in a compatibility mode and
+ * it needs to remain unchanged
+ * - custom doesn't support any optional features, there's nothing to
+ * update
+ */
+
+ if (guest->mode == VIR_CPU_MODE_CUSTOM)
+ guest->match = VIR_CPU_MATCH_EXACT;
+
+ return 0;
+}
+
+struct cpuArchDriver cpuDriverLoongArch = {
+ .name = "LoongArch",
+ .arch = archs,
+ .narch = G_N_ELEMENTS(archs),
+ .compare = virCPULoongArchCompare,
+ .decode = NULL,
+ .encode = NULL,
+ .dataFree = NULL,
+ .baseline = NULL,
+ .update = virCPULoongArchUpdate,
+ .getModels = NULL,
+};
diff --git a/src/cpu/cpu_loongarch.h b/src/cpu/cpu_loongarch.h
new file mode 100644
index 0000000000..4bc1c0cd8f
--- /dev/null
+++ b/src/cpu/cpu_loongarch.h
@@ -0,0 +1,25 @@
+/*
+ * cpu_loongarch.h: CPU driver for 64-bit LOONGARCH CPUs
+ *
+ * Copyright (C) 2024 Loongson Technology.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "cpu.h"
+
+extern struct cpuArchDriver cpuDriverLoongArch;
diff --git a/src/cpu/meson.build b/src/cpu/meson.build
index 55396903b9..141230e380 100644
--- a/src/cpu/meson.build
+++ b/src/cpu/meson.build
@@ -1,6 +1,7 @@
cpu_sources = [
'cpu.c',
'cpu_arm.c',
+ 'cpu_loongarch.c',
'cpu_map.c',
'cpu_ppc64.c',
'cpu_riscv64.c',
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 83119e871a..f2339d6013 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -2665,6 +2665,8 @@ static const char *preferredMachines[] =
NULL, /* VIR_ARCH_ITANIUM (doesn't exist in QEMU any more) */
"lm32-evr", /* VIR_ARCH_LM32 */
+ "virt", /* VIR_ARCH_LOONGARCH64 */
+
"mcf5208evb", /* VIR_ARCH_M68K */
"petalogix-s3adsp1800", /* VIR_ARCH_MICROBLAZE */
"petalogix-s3adsp1800", /* VIR_ARCH_MICROBLAZEEL */
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 896aa8394f..0cea0b323a 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -4222,6 +4222,10 @@ qemuDomainDefAddDefaultDevices(virQEMUDriver *driver,
addPCIRoot = true;
break;
+ case VIR_ARCH_LOONGARCH64:
+ addPCIeRoot = true;
+ break;
+
case VIR_ARCH_ARMV7B:
case VIR_ARCH_CRIS:
case VIR_ARCH_ITANIUM:
diff --git a/src/util/virarch.c b/src/util/virarch.c
index 01e520de73..74b7ec6f1b 100644
--- a/src/util/virarch.c
+++ b/src/util/virarch.c
@@ -51,6 +51,8 @@ static const struct virArchData {
{ "ia64", 64, VIR_ARCH_LITTLE_ENDIAN },
{ "lm32", 32, VIR_ARCH_BIG_ENDIAN },
+ { "loongarch64", 64, VIR_ARCH_LITTLE_ENDIAN },
+
{ "m68k", 32, VIR_ARCH_BIG_ENDIAN },
{ "microblaze", 32, VIR_ARCH_BIG_ENDIAN },
{ "microblazeel", 32, VIR_ARCH_LITTLE_ENDIAN},
diff --git a/src/util/virarch.h b/src/util/virarch.h
index 747f77c48e..c033e5c68d 100644
--- a/src/util/virarch.h
+++ b/src/util/virarch.h
@@ -36,6 +36,8 @@ typedef enum {
VIR_ARCH_ITANIUM, /* Itanium 64 LE https://en.wikipedia.org/wiki/Itanium */
VIR_ARCH_LM32, /* MilkyMist 32 BE https://en.wikipedia.org/wiki/Milkymist */
+ VIR_ARCH_LOONGARCH64, /* LoongArch 64 LE */
+
VIR_ARCH_M68K, /* m68k 32 BE https://en.wikipedia.org/wiki/Motorola_68000_family */
VIR_ARCH_MICROBLAZE, /* Microblaze 32 BE https://en.wikipedia.org/wiki/MicroBlaze */
VIR_ARCH_MICROBLAZEEL, /* Microblaze 32 LE https://en.wikipedia.org/wiki/MicroBlaze */
@@ -106,6 +108,8 @@ typedef enum {
#define ARCH_IS_SH4(arch) ((arch) == VIR_ARCH_SH4 ||\
(arch) == VIR_ARCH_SH4EB)
+#define ARCH_IS_LOONGARCH(arch) ((arch) == VIR_ARCH_LOONGARCH64)
+
typedef enum {
VIR_ARCH_LITTLE_ENDIAN,
VIR_ARCH_BIG_ENDIAN,
--
2.39.1
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