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| author | Alistair Francis <alistair.francis@xilinx.com> | 2018-03-09 17:09:43 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-03-09 17:09:43 +0000 |
| commit | f9a697112ee64180354f98309a5d6b691cc8699d (patch) | |
| tree | 00680529bed683a45c50eb78209affdf7e787748 /target/arm/cpu.c | |
| parent | b39b61e410022f96ceb53d4381d25cba5126ac44 (diff) | |
| download | qemu-f9a697112ee64180354f98309a5d6b691cc8699d.zip | |
target/arm: Add a core count property
The cortex A53 TRM specifies that bits 24 and 25 of the L2CTLR register
specify the number of cores in the processor, not the total number of
cores in the system. To report this correctly on machines with multiple
CPU clusters (ARM's big.LITTLE or Xilinx's ZynqMP) we need to allow
the machine to overwrite this value. To do this let's add an optional
property.
Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: ef01d95c0759e88f47f22d11b14c91512a658b4f.1520018138.git.alistair.francis@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/cpu.c')
| -rw-r--r-- | target/arm/cpu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 6b77aaa445..3e4e9f1873 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -939,6 +939,11 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp) cs->num_ases = 1; } cpu_address_space_init(cs, ARMASIdx_NS, "cpu-memory", cs->memory); + + /* No core_count specified, default to smp_cpus. */ + if (cpu->core_count == -1) { + cpu->core_count = smp_cpus; + } #endif qemu_init_vcpu(cs); @@ -1765,6 +1770,7 @@ static Property arm_cpu_properties[] = { DEFINE_PROP_UINT64("mp-affinity", ARMCPU, mp_affinity, ARM64_AFFINITY_INVALID), DEFINE_PROP_INT32("node-id", ARMCPU, node_id, CPU_UNSET_NUMA_NODE_ID), + DEFINE_PROP_INT32("core-count", ARMCPU, core_count, -1), DEFINE_PROP_END_OF_LIST() }; |