From: Andrew Jones <ajones@ventanamicro.com>
To: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-devel@nongnu.org, qemu-riscv@nongnu.org,
alistair.francis@wdc.com, bmeng@tinylab.org,
liweiwei@iscas.ac.cn, zhiwei_liu@linux.alibaba.com,
palmer@rivosinc.com
Subject: Re: [PATCH v4 9/9] target/riscv/tcg: warn if profile exts are disabled
Date: Wed, 25 Oct 2023 18:28:03 +0200 [thread overview]
Message-ID: <20231025-8fa7e3ae7b0d41ae96e2e2d1@orel> (raw)
In-Reply-To: <20231025135001.531224-10-dbarboza@ventanamicro.com>
On Wed, Oct 25, 2023 at 10:50:01AM -0300, Daniel Henrique Barboza wrote:
> Enabling a profile and then disabling some of its mandatory extensions
> is a valid use. It can be useful for debugging and testing. But the
> common expected use of enabling a profile is to enable all its mandatory
> extensions.
>
> Add an user warning when mandatory extensions from an enabled profile
> are disabled in the command line, like we're already doing with RVG.
>
> After this patch, this will throw warnings:
>
> -cpu rv64,rva22u64=true,zihintpause=false,zicbom=false,zicboz=false
>
> qemu-system-riscv64: warning: Profile rva22u64 mandates disabled extension zihintpause
> qemu-system-riscv64: warning: Profile rva22u64 mandates disabled extension zicbom
> qemu-system-riscv64: warning: Profile rva22u64 mandates disabled extension zicboz
>
> Note that the following will NOT throw warnings because the profile is
> being enabled last, hence all its mandatory extensions will be enabled:
>
> -cpu rv64,zihintpause=false,zicbom=false,zicboz=false,rva22u64=true
>
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> ---
> target/riscv/tcg/tcg-cpu.c | 57 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
prev parent reply other threads:[~2023-10-25 16:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-25 13:49 [PATCH v4 0/9] RVA22U64 profile support Daniel Henrique Barboza
2023-10-25 13:49 ` [PATCH v4 1/9] target/riscv: add rva22u64 profile definition Daniel Henrique Barboza
2023-10-25 16:05 ` Andrew Jones
2023-10-25 23:48 ` Richard Henderson
2023-10-25 23:49 ` Richard Henderson
2023-10-25 13:49 ` [PATCH v4 2/9] target/riscv/kvm: add 'rva22u64' flag as unavailable Daniel Henrique Barboza
2023-10-25 16:09 ` Andrew Jones
2023-10-25 13:49 ` [PATCH v4 3/9] target/riscv/tcg: add user flag for profile support Daniel Henrique Barboza
2023-10-25 16:10 ` Andrew Jones
2023-10-25 13:49 ` [PATCH v4 4/9] target/riscv/tcg: add MISA user options hash Daniel Henrique Barboza
2023-10-25 16:14 ` Andrew Jones
2023-10-25 13:49 ` [PATCH v4 5/9] target/riscv/tcg: add riscv_cpu_write_misa_bit() Daniel Henrique Barboza
2023-10-25 16:14 ` Andrew Jones
2023-10-25 13:49 ` [PATCH v4 6/9] target/riscv/tcg: handle profile MISA bits Daniel Henrique Barboza
2023-10-25 16:16 ` Andrew Jones
2023-10-25 13:49 ` [PATCH v4 7/9] target/riscv/tcg: add hash table insert helpers Daniel Henrique Barboza
2023-10-25 16:18 ` Andrew Jones
2023-10-25 13:50 ` [PATCH v4 8/9] target/riscv/tcg: honor user choice for G MISA bits Daniel Henrique Barboza
2023-10-25 16:24 ` Andrew Jones
2023-10-25 13:50 ` [PATCH v4 9/9] target/riscv/tcg: warn if profile exts are disabled Daniel Henrique Barboza
2023-10-25 16:28 ` Andrew Jones [this message]
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