Wire up loongson_ipi device for loongson3_virt machine, so we
can have SMP support for TCG backend as well.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
hw/mips/Kconfig | 1 +
hw/mips/loongson3_bootp.c | 2 --
hw/mips/loongson3_bootp.h | 3 +++
hw/mips/loongson3_virt.c | 39 +++++++++++++++++++++++++++++++++++++--
4 files changed, 41 insertions(+), 4 deletions(-)
diff --git a/hw/mips/Kconfig b/hw/mips/Kconfig
index a7f26edebe84..692bede538ee 100644
--- a/hw/mips/Kconfig
+++ b/hw/mips/Kconfig
@@ -67,6 +67,7 @@ config LOONGSON3V
imply USB_OHCI_PCI
select SERIAL
select GOLDFISH_RTC
+ select LOONGSON_IPI
select LOONGSON_LIOINTC
select PCI_EXPRESS_GENERIC_BRIDGE
select MSI_NONBROKEN
diff --git a/hw/mips/loongson3_bootp.c b/hw/mips/loongson3_bootp.c
index 03a10b63c1b4..b97b81903b74 100644
--- a/hw/mips/loongson3_bootp.c
+++ b/hw/mips/loongson3_bootp.c
@@ -25,8 +25,6 @@
#include "hw/boards.h"
#include "hw/mips/loongson3_bootp.h"
-#define LOONGSON3_CORE_PER_NODE 4
-
static void init_cpu_info(void *g_cpuinfo, uint64_t cpu_freq)
{
struct efi_cpuinfo_loongson *c = g_cpuinfo;
diff --git a/hw/mips/loongson3_bootp.h b/hw/mips/loongson3_bootp.h
index 1b0dd3b59171..9091265df7fc 100644
--- a/hw/mips/loongson3_bootp.h
+++ b/hw/mips/loongson3_bootp.h
@@ -200,6 +200,8 @@ struct boot_params {
struct efi_reset_system_t reset_system;
};
+#define LOONGSON3_CORE_PER_NODE 4
+
/* Overall MMIO & Memory layout */
enum {
VIRT_LOWMEM,
@@ -211,6 +213,7 @@ enum {
VIRT_BIOS_ROM,
VIRT_UART,
VIRT_LIOINTC,
+ VIRT_IPI,
VIRT_PCIE_MMIO,
VIRT_HIGHMEM
};
diff --git a/hw/mips/loongson3_virt.c b/hw/mips/loongson3_virt.c
index 440268a07430..3a4105228c1d 100644
--- a/hw/mips/loongson3_virt.c
+++ b/hw/mips/loongson3_virt.c
@@ -36,6 +36,7 @@
#include "hw/mips/loongson3_bootp.h"
#include "hw/misc/unimp.h"
#include "hw/intc/i8259.h"
+#include "hw/intc/loongson_ipi.h"
#include "hw/loader.h"
#include "hw/isa/superio.h"
#include "hw/pci/msi.h"
@@ -74,6 +75,7 @@ const MemMapEntry virt_memmap[] = {
[VIRT_PCIE_ECAM] = { 0x1a000000, 0x2000000 },
[VIRT_BIOS_ROM] = { 0x1fc00000, 0x200000 },
[VIRT_UART] = { 0x1fe001e0, 0x8 },
+ [VIRT_IPI] = { 0x3ff01000, 0x400 },
[VIRT_LIOINTC] = { 0x3ff01400, 0x64 },
[VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 },
[VIRT_HIGHMEM] = { 0x80000000, 0x0 }, /* Variable */
@@ -485,6 +487,7 @@ static void mips_loongson3_virt_init(MachineState *machine)
Clock *cpuclk;
CPUMIPSState *env;
DeviceState *liointc;
+ DeviceState *ipi = NULL;
char *filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *kernel_filename = machine->kernel_filename;
@@ -494,6 +497,7 @@ static void mips_loongson3_virt_init(MachineState *machine)
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *bios = g_new(MemoryRegion, 1);
MemoryRegion *iomem = g_new(MemoryRegion, 1);
+ MemoryRegion *iocsr = g_new(MemoryRegion, 1);
/* TODO: TCG will support all CPU types */
if (!kvm_enabled()) {
@@ -527,6 +531,19 @@ static void mips_loongson3_virt_init(MachineState *machine)
create_unimplemented_device("mmio fallback 0", 0x10000000, 256 * MiB);
create_unimplemented_device("mmio fallback 1", 0x30000000, 256 * MiB);
+ memory_region_init(iocsr, OBJECT(machine), "loongson3.iocsr", UINT32_MAX);
+
+ /* IPI controller is in kernel for KVM */
+ if (!kvm_enabled()) {
+ ipi = qdev_new(TYPE_LOONGSON_IPI);
+ qdev_prop_set_uint32(ipi, "num-cpu", machine->smp.cpus);
+ sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
+ memory_region_add_subregion(iocsr, SMP_IPI_MAILBOX,
+ sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 0));
+ memory_region_add_subregion(iocsr, MAIL_SEND_ADDR,
+ sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 1));
+ }
+
liointc = qdev_new("loongson.liointc");
sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal);
@@ -543,6 +560,8 @@ static void mips_loongson3_virt_init(MachineState *machine)
clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ);
for (i = 0; i < machine->smp.cpus; i++) {
+ int node = i / LOONGSON3_CORE_PER_NODE;
+ int core = i % LOONGSON3_CORE_PER_NODE;
int ip;
/* init CPUs */
@@ -553,12 +572,28 @@ static void mips_loongson3_virt_init(MachineState *machine)
cpu_mips_clock_init(cpu);
qemu_register_reset(main_cpu_reset, cpu);
- if (i >= 4) {
+ if (ipi) {
+ hwaddr base = ((hwaddr)node << 44) + virt_memmap[VIRT_IPI].base;
+ base += core * 0x100;
+ qdev_connect_gpio_out(ipi, i, cpu->env.irq[6]);
+ sysbus_mmio_map(SYS_BUS_DEVICE(ipi), i + 2, base);
+ }
+
+ if (ase_lcsr_available(&MIPS_CPU(cpu)->env)) {
+ MemoryRegion *core_iocsr = g_new(MemoryRegion, 1);
+ g_autofree char *name = g_strdup_printf("loongson3.core%d_iocsr", i);
+ memory_region_init_alias(core_iocsr, OBJECT(cpu), name,
+ iocsr, 0, UINT32_MAX);
+ memory_region_add_subregion(&MIPS_CPU(cpu)->env.iocsr.mr,
+ 0, core_iocsr);
+ }
+
+ if (node > 0) {
continue; /* Only node-0 can be connected to LIOINTC */
}
for (ip = 0; ip < 4 ; ip++) {
- int pin = i * 4 + ip;
+ int pin = core * LOONGSON3_CORE_PER_NODE + ip;
sysbus_connect_irq(SYS_BUS_DEVICE(liointc),
pin, cpu->env.irq[ip + 2]);
}
--
2.43.0On 5/6/24 04:15, Jiaxun Yang wrote:
> Wire up loongson_ipi device for loongson3_virt machine, so we
> can have SMP support for TCG backend as well.
>
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
> hw/mips/Kconfig | 1 +
> hw/mips/loongson3_bootp.c | 2 --
> hw/mips/loongson3_bootp.h | 3 +++
> hw/mips/loongson3_virt.c | 39 +++++++++++++++++++++++++++++++++++++--
> 4 files changed, 41 insertions(+), 4 deletions(-)
> @@ -527,6 +531,19 @@ static void mips_loongson3_virt_init(MachineState *machine)
> create_unimplemented_device("mmio fallback 0", 0x10000000, 256 * MiB);
> create_unimplemented_device("mmio fallback 1", 0x30000000, 256 * MiB);
>
> + memory_region_init(iocsr, OBJECT(machine), "loongson3.iocsr", UINT32_MAX);
> +
> + /* IPI controller is in kernel for KVM */
> + if (!kvm_enabled()) {
Generically one could come with another hypervisor support, so better
to check for what you are expecting. You could see some uses of:
if (tcg) ... else if (kvm) ... else abort().
> + ipi = qdev_new(TYPE_LOONGSON_IPI);
> + qdev_prop_set_uint32(ipi, "num-cpu", machine->smp.cpus);
> + sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
> + memory_region_add_subregion(iocsr, SMP_IPI_MAILBOX,
> + sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 0));
> + memory_region_add_subregion(iocsr, MAIL_SEND_ADDR,
> + sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 1));
> + }
> +
> liointc = qdev_new("loongson.liointc");
> sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal);
>
> @@ -543,6 +560,8 @@ static void mips_loongson3_virt_init(MachineState *machine)
> clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ);
>
> for (i = 0; i < machine->smp.cpus; i++) {
> + int node = i / LOONGSON3_CORE_PER_NODE;
> + int core = i % LOONGSON3_CORE_PER_NODE;
> int ip;
>
> /* init CPUs */
> @@ -553,12 +572,28 @@ static void mips_loongson3_virt_init(MachineState *machine)
> cpu_mips_clock_init(cpu);
> qemu_register_reset(main_cpu_reset, cpu);
>
> - if (i >= 4) {
> + if (ipi) {
> + hwaddr base = ((hwaddr)node << 44) + virt_memmap[VIRT_IPI].base;
> + base += core * 0x100;
> + qdev_connect_gpio_out(ipi, i, cpu->env.irq[6]);
> + sysbus_mmio_map(SYS_BUS_DEVICE(ipi), i + 2, base);
> + }
> +
> + if (ase_lcsr_available(&MIPS_CPU(cpu)->env)) {
> + MemoryRegion *core_iocsr = g_new(MemoryRegion, 1);
> + g_autofree char *name = g_strdup_printf("loongson3.core%d_iocsr", i);
> + memory_region_init_alias(core_iocsr, OBJECT(cpu), name,
> + iocsr, 0, UINT32_MAX);
> + memory_region_add_subregion(&MIPS_CPU(cpu)->env.iocsr.mr,
> + 0, core_iocsr);
> + }
> +
> + if (node > 0) {
> continue; /* Only node-0 can be connected to LIOINTC */
> }
Pre-existing, but the logic appears clearer as:
if (node == 0) {
>
> for (ip = 0; ip < 4 ; ip++) {
> - int pin = i * 4 + ip;
> + int pin = core * LOONGSON3_CORE_PER_NODE + ip;
> sysbus_connect_irq(SYS_BUS_DEVICE(liointc),
> pin, cpu->env.irq[ip + 2]);
> }
>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
On 18/6/24 13:17, Philippe Mathieu-Daudé wrote:
> On 5/6/24 04:15, Jiaxun Yang wrote:
>> Wire up loongson_ipi device for loongson3_virt machine, so we
>> can have SMP support for TCG backend as well.
>>
>> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>> ---
>> hw/mips/Kconfig | 1 +
>> hw/mips/loongson3_bootp.c | 2 --
>> hw/mips/loongson3_bootp.h | 3 +++
>> hw/mips/loongson3_virt.c | 39 +++++++++++++++++++++++++++++++++++++--
>> 4 files changed, 41 insertions(+), 4 deletions(-)
>
>
>> @@ -527,6 +531,19 @@ static void mips_loongson3_virt_init(MachineState
>> *machine)
>> create_unimplemented_device("mmio fallback 0", 0x10000000, 256 *
>> MiB);
>> create_unimplemented_device("mmio fallback 1", 0x30000000, 256 *
>> MiB);
>> + memory_region_init(iocsr, OBJECT(machine), "loongson3.iocsr",
>> UINT32_MAX);
>> +
>> + /* IPI controller is in kernel for KVM */
>> + if (!kvm_enabled()) {
>
> Generically one could come with another hypervisor support, so better
> to check for what you are expecting. You could see some uses of:
>
> if (tcg) ... else if (kvm) ... else abort().
>
>> + ipi = qdev_new(TYPE_LOONGSON_IPI);
>> + qdev_prop_set_uint32(ipi, "num-cpu", machine->smp.cpus);
>> + sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
>> + memory_region_add_subregion(iocsr, SMP_IPI_MAILBOX,
>> + sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 0));
>> + memory_region_add_subregion(iocsr, MAIL_SEND_ADDR,
>> + sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 1));
>> + }
>> +
>> liointc = qdev_new("loongson.liointc");
>> sysbus_realize_and_unref(SYS_BUS_DEVICE(liointc), &error_fatal);
>> @@ -543,6 +560,8 @@ static void mips_loongson3_virt_init(MachineState
>> *machine)
>> clock_set_hz(cpuclk, DEF_LOONGSON3_FREQ);
>> for (i = 0; i < machine->smp.cpus; i++) {
>> + int node = i / LOONGSON3_CORE_PER_NODE;
>> + int core = i % LOONGSON3_CORE_PER_NODE;
>> int ip;
>> /* init CPUs */
>> @@ -553,12 +572,28 @@ static void
>> mips_loongson3_virt_init(MachineState *machine)
>> cpu_mips_clock_init(cpu);
>> qemu_register_reset(main_cpu_reset, cpu);
>> - if (i >= 4) {
>> + if (ipi) {
>> + hwaddr base = ((hwaddr)node << 44) +
>> virt_memmap[VIRT_IPI].base;
>> + base += core * 0x100;
>> + qdev_connect_gpio_out(ipi, i, cpu->env.irq[6]);
>> + sysbus_mmio_map(SYS_BUS_DEVICE(ipi), i + 2, base);
>> + }
>> +
>> + if (ase_lcsr_available(&MIPS_CPU(cpu)->env)) {
>> + MemoryRegion *core_iocsr = g_new(MemoryRegion, 1);
Please store this in LoongsonMachineState (new patch):
MemoryRegion core_iocsr[LOONGSON_MAX_VCPUS];
>> + g_autofree char *name =
>> g_strdup_printf("loongson3.core%d_iocsr", i);
>> + memory_region_init_alias(core_iocsr, OBJECT(cpu), name,
>> + iocsr, 0, UINT32_MAX);
>> + memory_region_add_subregion(&MIPS_CPU(cpu)->env.iocsr.mr,
>> + 0, core_iocsr);
>> + }
>> +
>> + if (node > 0) {
>> continue; /* Only node-0 can be connected to LIOINTC */
>> }
>
> Pre-existing, but the logic appears clearer as:
>
> if (node == 0) {
>> for (ip = 0; ip < 4 ; ip++) {
>> - int pin = i * 4 + ip;
>> + int pin = core * LOONGSON3_CORE_PER_NODE + ip;
>> sysbus_connect_irq(SYS_BUS_DEVICE(liointc),
>> pin, cpu->env.irq[ip + 2]);
>> }
>>
>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>
© 2016 - 2026 Red Hat, Inc.