lkml.org 
[lkml]   [2021]   [Jun]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH Part1 RFC v3 07/22] x86/sev: Add a helper for the PVALIDATE instruction
On Wed, Jun 02, 2021 at 09:04:01AM -0500, Brijesh Singh wrote:
> +static inline int pvalidate(unsigned long vaddr, bool rmp_psize, bool validate)
> +{
> + bool no_rmpupdate;
> + int rc;

From a previous review:

Please put over the opcode bytes line:

/* "pvalidate" mnemonic support in binutils 2.36 and newer */

> + asm volatile(".byte 0xF2, 0x0F, 0x01, 0xFF\n\t"
> + CC_SET(c)
> + : CC_OUT(c) (no_rmpupdate), "=a"(rc)
> + : "a"(vaddr), "c"(rmp_psize), "d"(validate)
> + : "memory", "cc");
> +
> + if (no_rmpupdate)
> + return PVALIDATE_FAIL_NOUPDATE;
> +
> + return rc;
> +}

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

\
 
 \ /
  Last update: 2021-06-07 17:36    [W:0.427 / U:0.180 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site