lkml.org 
[lkml]   [2022]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v6 5/6] RISC-V: Do no continue isa string parsing without correct XLEN
On Tue, Mar 15, 2022 at 2:09 AM Atish Patra <atishp@rivosinc.com> wrote:
>
> The isa string should begin with either rv64 or rv32. Otherwise, it is
> an incorrect isa string. Currently, the string parsing continues even if
> it doesnot begin with current XLEN.
>
> Fix this by checking if it found "rv64" or "rv32" in the beginning.
>
> Tested-by: Heiko Stuebner <heiko@sntech.de>
> Signed-off-by: Atish Patra <atishp@rivosinc.com>

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup

> ---
> arch/riscv/kernel/cpufeature.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> index 3455fdfd680e..a43c08af5f4b 100644
> --- a/arch/riscv/kernel/cpufeature.c
> +++ b/arch/riscv/kernel/cpufeature.c
> @@ -84,6 +84,7 @@ void __init riscv_fill_hwcap(void)
> for_each_of_cpu_node(node) {
> unsigned long this_hwcap = 0;
> DECLARE_BITMAP(this_isa, RISCV_ISA_EXT_MAX);
> + const char *temp;
>
> if (riscv_of_processor_hartid(node) < 0)
> continue;
> @@ -93,6 +94,7 @@ void __init riscv_fill_hwcap(void)
> continue;
> }
>
> + temp = isa;
> #if IS_ENABLED(CONFIG_32BIT)
> if (!strncmp(isa, "rv32", 4))
> isa += 4;
> @@ -100,6 +102,9 @@ void __init riscv_fill_hwcap(void)
> if (!strncmp(isa, "rv64", 4))
> isa += 4;
> #endif
> + /* The riscv,isa DT property must start with rv64 or rv32 */
> + if (temp == isa)
> + continue;
> bitmap_zero(this_isa, RISCV_ISA_EXT_MAX);
> for (; *isa; ++isa) {
> const char *ext = isa++;
> --
> 2.30.2
>

\
 
 \ /
  Last update: 2022-03-15 04:10    [W:0.179 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site