hw/riscv/virt.c: add cbo[mz]-block-size fdt properties
The cbom-block-size fdt property property is used to inform the OS about
the blocksize in bytes for the Zicbom cache operations. Linux documents
it in Documentation/devicetree/bindings/riscv/cpus.yaml
as:
riscv,cbom-block-size:
$ref: /schemas/types.yaml#/definitions/uint32
description:
The blocksize in bytes for the Zicbom cache operations.
cboz-block-size has the same role but for the Zicboz extension, i.e.
informs the size in bytes for Zicboz cache operations. Linux support
for it is under review/approval in [1]. Patch 3 of that series describes
cboz-block-size as:
riscv,cboz-block-size:
$ref: /schemas/types.yaml#/definitions/uint32
description:
The blocksize in bytes for the Zicboz cache operations.
[1] https://lore.kernel.org/all/20230224162631.405473-1-ajones@ventanamicro.com/
Cc: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Message-ID: <20230302091406.407824-2-dbarboza@ventanamicro.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 4f81918..7f70fa1 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -249,6 +249,17 @@
name = riscv_isa_string(cpu_ptr);
qemu_fdt_setprop_string(ms->fdt, cpu_name, "riscv,isa", name);
g_free(name);
+
+ if (cpu_ptr->cfg.ext_icbom) {
+ qemu_fdt_setprop_cell(ms->fdt, cpu_name, "riscv,cbom-block-size",
+ cpu_ptr->cfg.cbom_blocksize);
+ }
+
+ if (cpu_ptr->cfg.ext_icboz) {
+ qemu_fdt_setprop_cell(ms->fdt, cpu_name, "riscv,cboz-block-size",
+ cpu_ptr->cfg.cboz_blocksize);
+ }
+
qemu_fdt_setprop_string(ms->fdt, cpu_name, "compatible", "riscv");
qemu_fdt_setprop_string(ms->fdt, cpu_name, "status", "okay");
qemu_fdt_setprop_cell(ms->fdt, cpu_name, "reg",
