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Re: [PATCH v3 11/19] target/riscv/cpu: add misa_ext_info_arr[]
From: |
Andrew Jones |
Subject: |
Re: [PATCH v3 11/19] target/riscv/cpu: add misa_ext_info_arr[] |
Date: |
Fri, 23 Jun 2023 11:30:47 +0200 |
On Thu, Jun 22, 2023 at 10:56:52AM -0300, Daniel Henrique Barboza wrote:
> Next patch will add KVM specific user properties for both MISA and
> multi-letter extensions. For MISA extensions we want to make use of what
> is already available in misa_ext_cfgs[] to avoid code repetition.
>
> misa_ext_info_arr[] array will hold name and description for each MISA
> extension that misa_ext_cfgs[] is declaring. We'll then use this new
> array in KVM code to avoid duplicating strings.
>
> There's nothing holding us back from doing the same with multi-letter
> extensions. For now doing just with MISA extensions is enough.
>
> Suggested-by: Andrew Jones <ajones@ventanamicro.com>
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> ---
> target/riscv/cpu.c | 60 ++++++++++++++++++++++++++--------------------
> target/riscv/cpu.h | 11 ++++++++-
> 2 files changed, 44 insertions(+), 27 deletions(-)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index 641bec3573..0e5d8b05a2 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -1566,33 +1566,41 @@ static void cpu_get_misa_ext_cfg(Object *obj, Visitor
> *v, const char *name,
> visit_type_bool(v, name, &value, errp);
> }
>
> +const MISAExtInfo misa_ext_info_arr[] = {
> + [RVA] = {"a", "Atomic instructions"},
> + [RVC] = {"c", "Compressed instructions"},
> + [RVD] = {"d", "Double-precision float point"},
> + [RVF] = {"f", "Single-precision float point"},
> + [RVI] = {"i", "Base integer instruction set"},
> + [RVE] = {"e", "Base integer instruction set (embedded)"},
> + [RVM] = {"m", "Integer multiplication and division"},
> + [RVS] = {"s", "Supervisor-level instructions"},
> + [RVU] = {"u", "User-level instructions"},
> + [RVH] = {"h", "Hypervisor"},
> + [RVJ] = {"x-j", "Dynamic translated languages"},
> + [RVV] = {"v", "Vector operations"},
> + [RVG] = {"g", "General purpose (IMAFD_Zicsr_Zifencei)"},
> +};
> +
> +#define MISA_CFG(_bit, _enabled) \
> + {.name = misa_ext_info_arr[_bit].name, \
> + .description = misa_ext_info_arr[_bit].description, \
> + .misa_bit = _bit, .enabled = _enabled}
> +
> static const RISCVCPUMisaExtConfig misa_ext_cfgs[] = {
> - {.name = "a", .description = "Atomic instructions",
> - .misa_bit = RVA, .enabled = true},
> - {.name = "c", .description = "Compressed instructions",
> - .misa_bit = RVC, .enabled = true},
> - {.name = "d", .description = "Double-precision float point",
> - .misa_bit = RVD, .enabled = true},
> - {.name = "f", .description = "Single-precision float point",
> - .misa_bit = RVF, .enabled = true},
> - {.name = "i", .description = "Base integer instruction set",
> - .misa_bit = RVI, .enabled = true},
> - {.name = "e", .description = "Base integer instruction set (embedded)",
> - .misa_bit = RVE, .enabled = false},
> - {.name = "m", .description = "Integer multiplication and division",
> - .misa_bit = RVM, .enabled = true},
> - {.name = "s", .description = "Supervisor-level instructions",
> - .misa_bit = RVS, .enabled = true},
> - {.name = "u", .description = "User-level instructions",
> - .misa_bit = RVU, .enabled = true},
> - {.name = "h", .description = "Hypervisor",
> - .misa_bit = RVH, .enabled = true},
> - {.name = "x-j", .description = "Dynamic translated languages",
> - .misa_bit = RVJ, .enabled = false},
> - {.name = "v", .description = "Vector operations",
> - .misa_bit = RVV, .enabled = false},
> - {.name = "g", .description = "General purpose (IMAFD_Zicsr_Zifencei)",
> - .misa_bit = RVG, .enabled = false},
> + MISA_CFG(RVA, true),
> + MISA_CFG(RVC, true),
> + MISA_CFG(RVD, true),
> + MISA_CFG(RVF, true),
> + MISA_CFG(RVI, true),
> + MISA_CFG(RVE, false),
> + MISA_CFG(RVM, true),
> + MISA_CFG(RVS, true),
> + MISA_CFG(RVU, true),
> + MISA_CFG(RVH, true),
> + MISA_CFG(RVJ, false),
> + MISA_CFG(RVV, false),
> + MISA_CFG(RVG, false),
> };
>
> static void riscv_cpu_add_misa_properties(Object *cpu_obj)
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index e3e08d315f..3e08c8da51 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -41,7 +41,10 @@
>
> #define RV(x) ((target_ulong)1 << (x - 'A'))
>
> -/* Consider updating misa_ext_cfgs[] when adding new MISA bits here */
> +/*
> + * Consider updating misa_ext_info_arr[] and misa_ext_cfgs[]
> + * when adding new MISA bits here.
> + */
> #define RVI RV('I')
> #define RVE RV('E') /* E and I are mutually exclusive */
> #define RVM RV('M')
> @@ -56,6 +59,12 @@
> #define RVJ RV('J')
> #define RVG RV('G')
>
> +typedef struct misa_ext_info {
> + const char *name;
> + const char *description;
> +} MISAExtInfo;
> +
> +extern const MISAExtInfo misa_ext_info_arr[];
>
> /* Privileged specification version */
> enum {
> --
> 2.41.0
>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
- [PATCH v3 00/19] target/riscv, KVM: fixes and enhancements, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 01/19] target/riscv: skip features setup for KVM CPUs, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 02/19] hw/riscv/virt.c: skip 'mmu-type' FDT if satp mode not set, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 03/19] target/riscv/cpu.c: restrict 'mvendorid' value, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 08/19] target/riscv: handle mvendorid/marchid/mimpid for KVM CPUs, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 09/19] linux-headers: Update to v6.4-rc1, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 11/19] target/riscv/cpu: add misa_ext_info_arr[], Daniel Henrique Barboza, 2023/06/22
- Re: [PATCH v3 11/19] target/riscv/cpu: add misa_ext_info_arr[],
Andrew Jones <=
- [PATCH v3 05/19] target/riscv/cpu.c: restrict 'marchid' value, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 07/19] target/riscv: read marchid/mimpid in kvm_riscv_init_machine_ids(), Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 06/19] target/riscv: use KVM scratch CPUs to init KVM properties, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 13/19] target/riscv/kvm.c: update KVM MISA bits, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 04/19] target/riscv/cpu.c: restrict 'mimpid' value, Daniel Henrique Barboza, 2023/06/22
- [PATCH v3 12/19] target/riscv: add KVM specific MISA properties, Daniel Henrique Barboza, 2023/06/22