From: Khalid Aziz <khalid.aziz@oracle.com>
To: arnd@arndb.de, hpa@zytor.com, davem@davemloft.net,
dave.hansen@linux.intel.com
Cc: Khalid Aziz <khalid.aziz@oracle.com>,
0x7f454c46@gmail.com, tglx@linutronix.de, mingo@redhat.com,
x86@kernel.org, jroedel@suse.de, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, sparclinux@vger.kernel.org,
Khalid Aziz <khalid@gonehiking.org>
Subject: [PATCH v8 1/9] signals, sparc: Add signal codes for ADI violations
Date: Mon, 25 Sep 2017 10:48:52 -0600 [thread overview]
Message-ID: <14699ded812ff03644cb0446be7b4d18893550be.1506089472.git.khalid.aziz@oracle.com> (raw)
In-Reply-To: <cover.1506089472.git.khalid.aziz@oracle.com>
In-Reply-To: <cover.1506089472.git.khalid.aziz@oracle.com>
SPARC M7 processor introduces a new feature - Application Data
Integrity (ADI). ADI allows MMU to catch rogue accesses to memory.
When a rogue access occurs, MMU blocks the access and raises an
exception. In response to the exception, kernel sends the offending
task a SIGSEGV with si_code that indicates the nature of exception.
This patch adds three new signal codes specific to ADI feature:
1. ADI is not enabled for the address and task attempted to access
memory using ADI
2. Task attempted to access memory using wrong ADI tag and caused
a deferred exception.
3. Task attempted to access memory using wrong ADI tag and caused
a precise exception.
Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Khalid Aziz <khalid@gonehiking.org>
---
arch/x86/kernel/signal_compat.c | 2 +-
include/uapi/asm-generic/siginfo.h | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c
index 71beb28600d4..e6e0b50230c3 100644
--- a/arch/x86/kernel/signal_compat.c
+++ b/arch/x86/kernel/signal_compat.c
@@ -26,7 +26,7 @@ static inline void signal_compat_build_tests(void)
*/
BUILD_BUG_ON(NSIGILL != 8);
BUILD_BUG_ON(NSIGFPE != 8);
- BUILD_BUG_ON(NSIGSEGV != 4);
+ BUILD_BUG_ON(NSIGSEGV != 7);
BUILD_BUG_ON(NSIGBUS != 5);
BUILD_BUG_ON(NSIGTRAP != 4);
BUILD_BUG_ON(NSIGCHLD != 6);
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index 9c4eca6b374a..72b435beb930 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -224,7 +224,10 @@ typedef struct siginfo {
#define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */
#define SEGV_BNDERR (__SI_FAULT|3) /* failed address bound checks */
#define SEGV_PKUERR (__SI_FAULT|4) /* failed protection key checks */
-#define NSIGSEGV 4
+#define SEGV_ACCADI (__SI_FAULT|5) /* ADI not enabled for mapped object */
+#define SEGV_ADIDERR (__SI_FAULT|6) /* Disrupting MCD error */
+#define SEGV_ADIPERR (__SI_FAULT|7) /* Precise MCD exception */
+#define NSIGSEGV 7
/*
* SIGBUS si_codes
--
2.11.0
next prev parent reply other threads:[~2017-09-25 16:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-25 16:48 [PATCH v8 0/9] Application Data Integrity feature introduced by SPARC M7 Khalid Aziz
2017-09-25 16:48 ` Khalid Aziz [this message]
2017-09-25 16:48 ` [PATCH v8 2/9] mm, swap: Add infrastructure for saving page metadata as well on swap Khalid Aziz
2017-09-25 16:48 ` [PATCH v8 3/9] sparc64: Add support for ADI register fields, ASIs and traps Khalid Aziz
2017-09-25 16:48 ` [PATCH v8 4/9] sparc64: Add HV fault type handlers for ADI related faults Khalid Aziz
2017-09-25 16:48 ` [PATCH v8 5/9] sparc64: Add handler for "Memory Corruption Detected" trap Khalid Aziz
2017-09-25 16:48 ` [PATCH v8 6/9] sparc64: Add auxiliary vectors to report platform ADI properties Khalid Aziz
2017-09-25 16:48 ` [PATCH v8 7/9] mm: Add address parameter to arch_validate_prot() Khalid Aziz
2017-09-25 16:48 ` [PATCH v8 8/9] mm: Clear arch specific VM flags on protection change Khalid Aziz
2017-09-25 16:49 ` [PATCH v8 9/9] sparc64: Add support for ADI (Application Data Integrity) Khalid Aziz
2017-10-06 22:12 ` Anthony Yznaga
2017-10-12 14:44 ` Khalid Aziz
2017-10-12 20:27 ` Anthony Yznaga
2017-10-13 14:14 ` Khalid Aziz
2017-10-13 16:18 ` Khalid Aziz
2017-10-13 17:19 ` Anthony Yznaga
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=14699ded812ff03644cb0446be7b4d18893550be.1506089472.git.khalid.aziz@oracle.com \
--to=khalid.aziz@oracle.com \
--cc=0x7f454c46@gmail.com \
--cc=arnd@arndb.de \
--cc=dave.hansen@linux.intel.com \
--cc=davem@davemloft.net \
--cc=hpa@zytor.com \
--cc=jroedel@suse.de \
--cc=khalid@gonehiking.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=sparclinux@vger.kernel.org \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).