[newlib-cygwin] format_proc_cpuinfo: add enqcmd cpuinfo flag
Corinna Vinschen
corinna@sourceware.org
Tue Oct 13 18:06:20 GMT 2020
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=3fd14da2c36f32a6a8d5b8f2f6ed6fc38b9e90e3
commit 3fd14da2c36f32a6a8d5b8f2f6ed6fc38b9e90e3
Author: Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>
Date: Tue Oct 13 09:11:08 2020 -0600
format_proc_cpuinfo: add enqcmd cpuinfo flag
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.
Diff:
---
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 6f6e8291a..13397150f 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 */
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