diff options
| author | Bin Meng <bin.meng@windriver.com> | 2021-02-20 22:48:06 +0800 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2021-03-04 09:43:29 -0500 |
| commit | cfeb8a17c88f50c2a6dbf1cd4b9a279df5a30ec9 (patch) | |
| tree | 6e074843b3e2b53ba9d0bb4ea14e12cc619b066e | |
| parent | 2fa3c7b6eee83d3ca1bd3d69669cf2fb8a11223b (diff) | |
hw/riscv: virt: Limit RAM size in a 32-bit system
RV32 supports 34-bit physical address hence the maximum RAM size
should be limited. Limit the RAM size to 10 GiB, which leaves
some room for PCIe high mmio space.
For 32-bit host, this is not needed as machine->ram_size cannot
represent a RAM size that big. Use a #if size test to only do
the size limitation for the 64-bit host.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210220144807.819-4-bmeng.cn@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
| -rw-r--r-- | hw/riscv/virt.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 1d05bb3ef9..c4b8f455f8 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -590,6 +590,16 @@ static void virt_machine_init(MachineState *machine) } } + if (riscv_is_32bit(&s->soc[0])) { +#if HOST_LONG_BITS == 64 + /* limit RAM size in a 32-bit system */ + if (machine->ram_size > 10 * GiB) { + machine->ram_size = 10 * GiB; + error_report("Limiting RAM size to 10 GiB"); + } +#endif + } + /* register system main memory (actual RAM) */ memory_region_init_ram(main_mem, NULL, "riscv_virt_board.ram", machine->ram_size, &error_fatal); |