linux-kernel - Re: [PATCH] [5/7] Readd rdmsrl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 21 Mar 2008 18:06:13 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andi Kleen <andi@...stfloor.org>
cc:	andreas.herrmann3@....com, mingo@...e.hu,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [5/7] Readd rdmsrl_safe

On Wed, 12 Mar 2008, Andi Kleen wrote:
> RDMSR for 64bit values with exception handling.
> 
> Makes it easier to deal with 64bit valued MSRs. The old 64bit code
> base had that too as checking_rdmsrl(), but it got dropped somehow. 

Yup, no users.

> +#define rdmsrl_safe(msr,p) \
> +	({ int __err; *(p) = native_read_msr_safe(msr, &__err); __err; })
> +

static inline please

>  #define rdtscl(low)						\
>  	((low) = (u32)native_read_tsc())
>  
> Index: linux/include/asm-x86/paravirt.h
> ===================================================================
> --- linux.orig/include/asm-x86/paravirt.h
> +++ linux/include/asm-x86/paravirt.h
> @@ -687,6 +687,10 @@ static inline int paravirt_write_msr(uns
>  	(*b) = _l >> 32;			\
>  	_err; })
>  
> +#define rdmsrl_safe(msr, p) ({			\
> +	int _err;				\
> +	*(p) = paravirt_read_msr(msr, &_err);	\
> +	_err; })

ditto

Thanks,

	tglx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/