From cc2bf69a36e05e22a1dca9bf6305ef5e0cad993e Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Mon, 18 Dec 2023 09:53:13 -0300 Subject: [PATCH] target/riscv: add zicbop extension flag QEMU already implements zicbom (Cache Block Management Operations) and zicboz (Cache Block Zero Operations). Commit 59cb29d6a5 ("target/riscv: add Zicbop cbo.prefetch{i, r, m} placeholder") added placeholders for what would be the instructions for zicbop (Cache Block Prefetch Operations), which are now no-ops. The RVA22U64 profile mandates zicbop, which means that applications that run with this profile might expect zicbop to be present in the riscv,isa DT and might behave badly if it's absent. Adding zicbop as an extension will make our future RVA22U64 implementation more in line with what userspace expects and, if/when cache block prefetch operations became relevant to QEMU, we already have the extension flag to turn then on/off as needed. Signed-off-by: Daniel Henrique Barboza Reviewed-by: Andrew Jones Reviewed-by: Alistair Francis Message-ID: <20231218125334.37184-6-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis --- hw/riscv/virt.c | 5 +++++ target/riscv/cpu.c | 3 +++ target/riscv/cpu_cfg.h | 2 ++ 3 files changed, 10 insertions(+) diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 4194ddcef1..f9fd1341fc 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -250,6 +250,11 @@ static void create_fdt_socket_cpus(RISCVVirtState *s, int socket, cpu_ptr->cfg.cboz_blocksize); } + if (cpu_ptr->cfg.ext_zicbop) { + qemu_fdt_setprop_cell(ms->fdt, cpu_name, "riscv,cbop-block-size", + cpu_ptr->cfg.cbop_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", diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 33d25d12a6..ce0a3ded04 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -78,6 +78,7 @@ const uint32_t misa_bits[] = {RVI, RVE, RVM, RVA, RVF, RVD, RVV, */ const RISCVIsaExtData isa_edata_arr[] = { ISA_EXT_DATA_ENTRY(zicbom, PRIV_VERSION_1_12_0, ext_zicbom), + ISA_EXT_DATA_ENTRY(zicbop, PRIV_VERSION_1_12_0, ext_zicbop), ISA_EXT_DATA_ENTRY(zicboz, PRIV_VERSION_1_12_0, ext_zicboz), ISA_EXT_DATA_ENTRY(zicond, PRIV_VERSION_1_12_0, ext_zicond), ISA_EXT_DATA_ENTRY(zicntr, PRIV_VERSION_1_12_0, ext_zicntr), @@ -1375,6 +1376,7 @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = { MULTI_EXT_CFG_BOOL("zhinxmin", ext_zhinxmin, false), MULTI_EXT_CFG_BOOL("zicbom", ext_zicbom, true), + MULTI_EXT_CFG_BOOL("zicbop", ext_zicbop, true), MULTI_EXT_CFG_BOOL("zicboz", ext_zicboz, true), MULTI_EXT_CFG_BOOL("zmmul", ext_zmmul, false), @@ -1509,6 +1511,7 @@ Property riscv_cpu_options[] = { DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64), DEFINE_PROP_UINT16("cbom_blocksize", RISCVCPU, cfg.cbom_blocksize, 64), + DEFINE_PROP_UINT16("cbop_blocksize", RISCVCPU, cfg.cbop_blocksize, 64), DEFINE_PROP_UINT16("cboz_blocksize", RISCVCPU, cfg.cboz_blocksize, 64), DEFINE_PROP_END_OF_LIST(), diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h index d516de4a44..2da8ac9582 100644 --- a/target/riscv/cpu_cfg.h +++ b/target/riscv/cpu_cfg.h @@ -65,6 +65,7 @@ struct RISCVCPUConfig { bool ext_zicntr; bool ext_zicsr; bool ext_zicbom; + bool ext_zicbop; bool ext_zicboz; bool ext_zicond; bool ext_zihintntl; @@ -143,6 +144,7 @@ struct RISCVCPUConfig { uint16_t vlen; uint16_t elen; uint16_t cbom_blocksize; + uint16_t cbop_blocksize; uint16_t cboz_blocksize; bool mmu; bool pmp;