linux-kernel - Re: [PATCH v2 2/2] x86: paravirt: make native_save

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Message-ID: <0dd024cd-e05a-0d67-c1bf-1a532714bb1a@zytor.com>
Date:   Tue, 5 Jun 2018 10:31:11 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>,
        akpm@...ux-foundation.org, ard.biesheuvel@...aro.org,
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Subject: Re: [PATCH v2 2/2] x86: paravirt: make native_save_fl extern inline

On 06/05/18 10:28, H. Peter Anvin wrote:
> On 06/05/18 10:05, Nick Desaulniers wrote:
>> +
>> +/*
>> + * void native_restore_fl(unsigned long flags)
>> + * %rdi: flags
>> + */
>> +ENTRY(native_restore_fl)
>> +	push %_ASM_DI
>> +	popf
>> +	ret
>> +ENDPROC(native_restore_fl)
>> +EXPORT_SYMBOL(native_restore_fl)
>>
> 
> To work on i386, this would have to be %_ASM_AX in that case.
> 
> Something like this added to <asm/asm.h> might be useful; then you can
> simply:
> 
> 	push %_ASM_ARG1
> 

Version with fixed typo...

	-hpa


View attachment "0001-x86-asm-add-_ASM_ARG-constants-for-argument-registes.patch" of type "text/x-patch" (2093 bytes)