linux-kernel - Re: [PATCH v3] powerpc/kernel/sysfs: Export ldbar spr to sysfs

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Date:   Tue, 06 Mar 2018 22:05:39 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Anju T Sudhakar <anju@...ux.vnet.ibm.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        maddy@...ux.vnet.ibm.com, anju@...ux.vnet.ibm.com
Subject: Re: [PATCH v3] powerpc/kernel/sysfs: Export ldbar spr to sysfs

Anju T Sudhakar <anju@...ux.vnet.ibm.com> writes:

> diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
> index 4437c70..caefb64 100644
> --- a/arch/powerpc/kernel/sysfs.c
> +++ b/arch/powerpc/kernel/sysfs.c
> @@ -757,6 +759,9 @@ static int register_cpu_online(unsigned int cpu)
>  			device_create_file(s, &pmc_attrs[i]);
>  
>  #ifdef CONFIG_PPC64
> +	if (cpu_has_feature(CPU_FTR_ARCH_300))
> +		device_create_file(s, &dev_attr_ldbar);

Is this register readable in supervisor state?

cheers