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hw/riscv: spike: Allow creating multiple NUMA sockets

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We extend RISC-V spike machine to allow creating a multi-socket
machine. Each RISC-V spike machine socket is a NUMA node having
a set of HARTs, a memory instance, and a CLINT instance. Other
devices are shared between all sockets. We also update the
generated device tree accordingly.

By default, NUMA multi-socket support is disabled for RISC-V spike
machine. To enable it, users can use "-numa" command-line options
of QEMU.

Example1: For two NUMA nodes with 2 CPUs each, append following
to command-line options: "-smp 4 -numa node -numa node"

Example2: For two NUMA nodes with 1 and 3 CPUs, append following
to command-line options:
"-smp 4 -numa node -numa node -numa cpu,node-id=0,core-id=0 \
-numa cpu,node-id=1,core-id=1 -numa cpu,node-id=1,core-id=2 \
-numa cpu,node-id=1,core-id=3"

The maximum number of sockets in a RISC-V spike machine is 8
but this limit can be changed in future.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Message-Id: <20200616032229.766089-5-anup.patel@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anup Patel 2020-05-14 16:39:43 +05:30 • committed by Alistair Francis
parent 83fcaefd9d
commit a7172791e3
2 changed files with 168 additions and 77 deletions
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11
include/hw/riscv/spike.h
View file

@ -22,12 +22,19 @@
#include "hw/riscv/riscv_hart.h"
#include "hw/sysbus.h"
#define SPIKE_CPUS_MAX 8
#define SPIKE_SOCKETS_MAX 8
#define TYPE_SPIKE_MACHINE MACHINE_TYPE_NAME("spike")
#define SPIKE_MACHINE(obj) \
OBJECT_CHECK(SpikeState, (obj), TYPE_SPIKE_MACHINE)
typedef struct {
/*< private >*/
SysBusDevice parent_obj;
MachineState parent;
/*< public >*/
RISCVHartArrayState soc;
RISCVHartArrayState soc[SPIKE_SOCKETS_MAX];
void *fdt;
int fdt_size;
} SpikeState;