[PATCH] format_proc_cpuinfo: add enqcmd cpuinfo flag

[PATCH] format_proc_cpuinfo: add enqcmd cpuinfo flag

[Brian Inglis]

Add linux-next 5.9 cpuinfo flag for Intel enqcmd/s instructions:
x86/cpufeatures: Enumerate ENQCMD and ENQCMDS instructions:
Work submission instruction comes in two flavors. ENQCMD can be called
both in ring 3 and ring 0 and always uses the contents of a PASID MSR
when shipping the command to the device. ENQCMDS allows a kernel driver
to submit commands on behalf of a user process. The driver supplies the
PASID value in ENQCMDS. There isn't any usage of ENQCMD in the kernel as
of now.
The CPU feature flag is shown as "enqcmd" in /proc/cpuinfo.
---
 winsup/cygwin/fhandler_proc.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/winsup/cygwin/fhandler_proc.cc b/winsup/cygwin/fhandler_proc.cc
index 6f6e8291a0ca..13397150ff53 100644
--- a/winsup/cygwin/fhandler_proc.cc
+++ b/winsup/cygwin/fhandler_proc.cc
@@ -1563,6 +1563,7 @@ format_proc_cpuinfo (void *, char *&destbuf)
 	  ftcprint (features1, 25, "cldemote");         /* cldemote instr */
 	  ftcprint (features1, 27, "movdiri");          /* movdiri instr */
 	  ftcprint (features1, 28, "movdir64b");        /* movdir64b instr */
+	  ftcprint (features1, 29, "enqcmd");		/* enqcmd/s instructions*/
         }
 
       /* AMD MCA cpuid 0x80000007 ebx */
-- 
2.28.0

Re: [PATCH] format_proc_cpuinfo: add enqcmd cpuinfo flag

[Corinna Vinschen]

On Oct 13 09:11, Brian Inglis wrote:
> Add linux-next 5.9 cpuinfo flag for Intel enqcmd/s instructions:
> x86/cpufeatures: Enumerate ENQCMD and ENQCMDS instructions:
> Work submission instruction comes in two flavors. ENQCMD can be called
> both in ring 3 and ring 0 and always uses the contents of a PASID MSR
> when shipping the command to the device. ENQCMDS allows a kernel driver
> to submit commands on behalf of a user process. The driver supplies the
> PASID value in ENQCMDS. There isn't any usage of ENQCMD in the kernel as
> of now.
> The CPU feature flag is shown as "enqcmd" in /proc/cpuinfo.
> ---
>  winsup/cygwin/fhandler_proc.cc | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/winsup/cygwin/fhandler_proc.cc b/winsup/cygwin/fhandler_proc.cc
> index 6f6e8291a0ca..13397150ff53 100644
> --- a/winsup/cygwin/fhandler_proc.cc
> +++ b/winsup/cygwin/fhandler_proc.cc
> @@ -1563,6 +1563,7 @@ format_proc_cpuinfo (void *, char *&destbuf)
>  	  ftcprint (features1, 25, "cldemote");         /* cldemote instr */
>  	  ftcprint (features1, 27, "movdiri");          /* movdiri instr */
>  	  ftcprint (features1, 28, "movdir64b");        /* movdir64b instr */
> +	  ftcprint (features1, 29, "enqcmd");		/* enqcmd/s instructions*/
>          }
>  
>        /* AMD MCA cpuid 0x80000007 ebx */
> -- 
> 2.28.0

Pushed.


Thanks,
Corinna