[PATCH] arm64: SSBS/DIT: print SSBS and DIT bit when printing PSTATE

[Vladimir Murzin]

On 7/19/21 8:34 AM, Shaokun Zhang wrote:
> From: Lingyan Huang <huanglingyan2 at huawei.com>
> 
> The current code to print PSTATE when generating backtraces does not include
> SSBS bit and DIT bit, so add this information.
> 
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Signed-off-by: Lingyan Huang <huanglingyan2 at huawei.com>
> Signed-off-by: Shaokun Zhang <zhangshaokun at hisilicon.com>
> ---
>  arch/arm64/kernel/process.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
> index c8989b999250..93de6586e0f8 100644
> --- a/arch/arm64/kernel/process.c
> +++ b/arch/arm64/kernel/process.c
> @@ -179,7 +179,7 @@ static void print_pstate(struct pt_regs *regs)
>  		const char *btype_str = btypes[(pstate & PSR_BTYPE_MASK) >>
>  					       PSR_BTYPE_SHIFT];
>  
> -		printk("pstate: %08llx (%c%c%c%c %c%c%c%c %cPAN %cUAO %cTCO BTYPE=%s)\n",
> +		printk("pstate: %08llx (%c%c%c%c %c%c%c%c %cPAN %cUAO %cTCO %cDIT %cSSBS BTYPE=%s)\n",
>  			pstate,
>  			pstate & PSR_N_BIT ? 'N' : 'n',
>  			pstate & PSR_Z_BIT ? 'Z' : 'z',
> @@ -192,6 +192,8 @@ static void print_pstate(struct pt_regs *regs)
>  			pstate & PSR_PAN_BIT ? '+' : '-',
>  			pstate & PSR_UAO_BIT ? '+' : '-',
>  			pstate & PSR_TCO_BIT ? '+' : '-',
> +			pstate & PSR_DIT_BIT ? '+' : '-',
> +			pstate & PSR_SSBS_BIT ? '+' : '-',
>  			btype_str);
>  	}
>  }
> 

Don't you need to update compat_user_mode(regs) case for completeness?

Cheers
Vladimir