MIPS: KVM: Add kvm guest support for Loongson-3

Loongson-3 KVM guest is based on virtio, it use liointc as its interrupt
controller and use GPEX as the pci controller.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f6bb446..499a20d 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -478,6 +478,7 @@ config MACH_LOONGSON64
        select COMMON_CLK
        select USE_OF
        select BUILTIN_DTB
+       select PCI_HOST_GENERIC
        help
          This enables the support of Loongson-2/3 family of machines.
 

diff --git a/arch/mips/boot/dts/loongson/Makefile b/arch/mips/boot/dts/loongson/Makefile
index ae1c8bf..8fd0efb 100644 (file)
--- a/arch/mips/boot/dts/loongson/Makefile
+++ b/arch/mips/boot/dts/loongson/Makefile
@@ -3,5 +3,6 @@ dtb-$(CONFIG_MACH_LOONGSON64)   += loongson64c_4core_ls7a.dtb
 dtb-$(CONFIG_MACH_LOONGSON64)  += loongson64c_4core_rs780e.dtb
 dtb-$(CONFIG_MACH_LOONGSON64)  += loongson64c_8core_rs780e.dtb
 dtb-$(CONFIG_MACH_LOONGSON64)  += loongson64g_4core_ls7a.dtb
+dtb-$(CONFIG_MACH_LOONGSON64)  += loongson64v_4core_virtio.dtb
 
 obj-$(CONFIG_BUILTIN_DTB)      += $(addsuffix .o, $(dtb-y))

diff --git a/arch/mips/boot/dts/loongson/loongson64v_4core_virtio.dts b/arch/mips/boot/dts/loongson/loongson64v_4core_virtio.dts
new file mode 100644 (file)
index 0000000..41f0b11
--- /dev/null
+++ b/arch/mips/boot/dts/loongson/loongson64v_4core_virtio.dts
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/dts-v1/;
+/ {
+       compatible = "loongson,loongson64v-4core-virtio";
+       #address-cells = <2>;
+       #size-cells = <2>;
+
+       cpuintc: interrupt-controller {
+               #address-cells = <0>;
+               #interrupt-cells = <1>;
+               interrupt-controller;
+               compatible = "mti,cpu-interrupt-controller";
+       };
+
+       package0: bus@1fe00000 {
+               compatible = "simple-bus";
+               #address-cells = <2>;
+               #size-cells = <1>;
+               ranges = <0 0x1fe00000 0 0x1fe00000 0x100000
+                       0 0x3ff00000 0 0x3ff00000 0x100000
+                       0xefd 0xfb000000 0xefd 0xfb000000 0x10000000>;
+
+               liointc: interrupt-controller@3ff01400 {
+                       compatible = "loongson,liointc-1.0";
+                       reg = <0 0x3ff01400 0x64>;
+
+                       interrupt-controller;
+                       #interrupt-cells = <2>;
+
+                       interrupt-parent = <&cpuintc>;
+                       interrupts = <2>, <3>;
+                       interrupt-names = "int0", "int1";
+
+                       loongson,parent_int_map = <0x00000001>, /* int0 */
+                                               <0xfffffffe>, /* int1 */
+                                               <0x00000000>, /* int2 */
+                                               <0x00000000>; /* int3 */
+
+               };
+
+               cpu_uart0: serial@1fe001e0 {
+                       compatible = "ns16550a";
+                       reg = <0 0x1fe001e0 0x8>;
+                       clock-frequency = <33000000>;
+                       interrupt-parent = <&liointc>;
+                       interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+                       no-loopback-test;
+               };
+       };
+
+       bus@10000000 {
+               compatible = "simple-bus";
+               #address-cells = <2>;
+               #size-cells = <2>;
+               ranges = <0 0x10000000 0 0x10000000 0 0x10000000 /* PIO & CONF & APB */
+                               0 0x40000000 0 0x40000000 0 0x40000000>; /* PCI MEM */
+
+               rtc0: rtc@10081000 {
+                       compatible = "google,goldfish-rtc";
+                       reg = <0 0x10081000 0 0x1000>;
+                       interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
+                       interrupt-parent = <&liointc>;
+               };
+
+               pci@1a000000 {
+                       compatible = "pci-host-ecam-generic";
+                       device_type = "pci";
+                       #address-cells = <3>;
+                       #size-cells = <2>;
+                       #interrupt-cells = <1>;
+
+                       bus-range = <0x0 0x1f>;
+                       reg = <0 0x1a000000 0 0x02000000>;
+
+                       ranges = <0x01000000 0x0 0x00004000 0x0 0x18004000 0x0 0x0000c000>,
+                                <0x02000000 0x0 0x40000000 0x0 0x40000000 0x0 0x40000000>;
+
+                       interrupt-map = <
+                               0x0000 0x0 0x0  0x1  &liointc  0x2 IRQ_TYPE_LEVEL_HIGH
+                               0x0800 0x0 0x0  0x1  &liointc  0x3 IRQ_TYPE_LEVEL_HIGH
+                               0x1000 0x0 0x0  0x1  &liointc  0x4 IRQ_TYPE_LEVEL_HIGH
+                               0x1800 0x0 0x0  0x1  &liointc  0x5 IRQ_TYPE_LEVEL_HIGH
+                               >;
+
+                       interrupt-map-mask = <0x1800 0x0 0x0  0x7>;
+               };
+
+               isa {
+                       compatible = "isa";
+                       #address-cells = <2>;
+                       #size-cells = <1>;
+                       ranges = <1 0 0 0x18000000 0x4000>;
+               };
+       };
+
+       hypervisor {
+               compatible = "linux,kvm";
+       };
+};

diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h
index b35be70..afc92b7 100644 (file)
--- a/arch/mips/include/asm/mach-loongson64/boot_param.h
+++ b/arch/mips/include/asm/mach-loongson64/boot_param.h
@@ -194,7 +194,8 @@ struct boot_params {
 
 enum loongson_bridge_type {
        LS7A = 1,
-       RS780E = 2
+       RS780E = 2,
+       VIRTUAL = 3
 };
 
 struct loongson_system_configuration {
@@ -230,5 +231,6 @@ extern struct loongson_system_configuration loongson_sysconf;
 extern u32 node_id_offset;
 extern void ls7a_early_config(void);
 extern void rs780e_early_config(void);
+extern void virtual_early_config(void);
 
 #endif

diff --git a/arch/mips/include/asm/mach-loongson64/builtin_dtbs.h b/arch/mips/include/asm/mach-loongson64/builtin_dtbs.h
index 6d2f141..839410c 100644 (file)
--- a/arch/mips/include/asm/mach-loongson64/builtin_dtbs.h
+++ b/arch/mips/include/asm/mach-loongson64/builtin_dtbs.h
@@ -12,4 +12,5 @@ extern u32 __dtb_loongson64c_4core_ls7a_begin[];
 extern u32 __dtb_loongson64c_4core_rs780e_begin[];
 extern u32 __dtb_loongson64c_8core_rs780e_begin[];
 extern u32 __dtb_loongson64g_4core_ls7a_begin[];
+extern u32 __dtb_loongson64v_4core_virtio_begin[];
 #endif

diff --git a/arch/mips/loongson64/env.c b/arch/mips/loongson64/env.c
index 2cb9573..134cb8e 100644 (file)
--- a/arch/mips/loongson64/env.c
+++ b/arch/mips/loongson64/env.c
@@ -167,14 +167,24 @@ void __init prom_init_env(void)
        vendor = id & 0xffff;
        device = (id >> 16) & 0xffff;
 
-       if (vendor == PCI_VENDOR_ID_LOONGSON && device == 0x7a00) {
+       switch (vendor) {
+       case PCI_VENDOR_ID_LOONGSON:
                pr_info("The bridge chip is LS7A\n");
                loongson_sysconf.bridgetype = LS7A;
                loongson_sysconf.early_config = ls7a_early_config;
-       } else {
+               break;
+       case PCI_VENDOR_ID_AMD:
+       case PCI_VENDOR_ID_ATI:
                pr_info("The bridge chip is RS780E or SR5690\n");
                loongson_sysconf.bridgetype = RS780E;
                loongson_sysconf.early_config = rs780e_early_config;
+               break;
+       default:
+               pr_info("The bridge chip is VIRTUAL\n");
+               loongson_sysconf.bridgetype = VIRTUAL;
+               loongson_sysconf.early_config = virtual_early_config;
+               loongson_fdt_blob = __dtb_loongson64v_4core_virtio_begin;
+               break;
        }
 
        if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) {

diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index 8ba22c3..ed75f79 100644 (file)
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -42,6 +42,11 @@ void rs780e_early_config(void)
        node_id_offset = 37;
 }
 
+void virtual_early_config(void)
+{
+       node_id_offset = 44;
+}
+
 void __init prom_init(void)
 {
        fw_init_cmdline();