diff mbox series

[PULL,04/22] hw/riscv/virt.c: add cbo[mz]-block-size fdt properties

Message ID 20230306220259.7748-5-palmer@rivosinc.com (mailing list archive)
State New, archived
Headers show
Series [PULL,01/22] target/riscv: implement Zicboz extension | expand

Commit Message

Palmer Dabbelt March 6, 2023, 10:02 p.m. UTC 
From: Anup Patel <apatel@ventanamicro.com>

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>
---
 hw/riscv/virt.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 4f8191860b..7f70fa11a1 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -249,6 +249,17 @@  static void create_fdt_socket_cpus(RISCVVirtState *s, int socket,
         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",