From: Haren Myneni <haren@linux.vnet.ibm.com>
To: mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc: paste - Mask XERSO bit in CR
Date: Wed, 25 Apr 2018 23:48:39 -0700 [thread overview]
Message-ID: <1524725319.26204.4.camel@hbabu-laptop> (raw)
NX can set 3rd bit in CR register for XER[SO] (Summation overflow)
which is not used for paste return value. So. mask this bit to get
proper return status.
Signed-off-by: Haren Myneni <haren@us.ibm.com>
diff --git a/arch/powerpc/platforms/powernv/copy-paste.h b/arch/powerpc/platforms/powernv/copy-paste.h
index c9a5036..82392e3 100644
--- a/arch/powerpc/platforms/powernv/copy-paste.h
+++ b/arch/powerpc/platforms/powernv/copy-paste.h
@@ -9,7 +9,8 @@
#include <asm/ppc-opcode.h>
#define CR0_SHIFT 28
-#define CR0_MASK 0xF
+#define CR0_MASK 0xE /* 3rd bit undefined or set for XER[SO] */
+
/*
* Copy/paste instructions:
*
next reply other threads:[~2018-04-26 6:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-26 6:48 Haren Myneni [this message]
2018-04-27 6:27 ` [PATCH] powerpc: paste - Mask XERSO bit in CR Michael Ellerman
2018-04-27 7:46 ` Haren Myneni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1524725319.26204.4.camel@hbabu-laptop \
--to=haren@linux.vnet.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox