From: Khalid Aziz <khalid.aziz@oracle.com>
To: arnd@arndb.de, davem@davemloft.net
Cc: Khalid Aziz <khalid.aziz@oracle.com>,
hpa@zytor.com, 0x7f454c46@gmail.com, dave.hansen@linux.intel.com,
tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
sparclinux@vger.kernel.org, Khalid Aziz <khalid@gonehiking.org>
Subject: [PATCH v4 1/4] signals, sparc: Add signal codes for ADI violations
Date: Wed, 11 Jan 2017 09:12:51 -0700 [thread overview]
Message-ID: <bc53392121e6df4abd127b16c7d3d0f2e2f7b4ed.1483999591.git.khalid.aziz@oracle.com> (raw)
In-Reply-To: <cover.1483999591.git.khalid.aziz@oracle.com>
In-Reply-To: <cover.1483999591.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 Ttag 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 ec1f756..d1e860c 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 1abaf62..2446864 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -213,7 +213,10 @@ 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
--
2.7.4
next prev parent reply other threads:[~2017-01-11 16:14 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-11 16:12 [PATCH v4 0/4] Application Data Integrity feature introduced by SPARC M7 Khalid Aziz
2017-01-11 16:12 ` Khalid Aziz [this message]
2017-01-11 16:12 ` [PATCH v4 2/4] mm: Add function to support extra actions on swap in/out Khalid Aziz
2017-01-11 16:56 ` Dave Hansen
2017-01-11 17:15 ` Khalid Aziz
2017-01-11 16:12 ` [PATCH v4 3/4] sparc64: Add support for ADI register fields, ASIs and traps Khalid Aziz
2017-01-17 4:23 ` David Miller
2017-01-17 15:55 ` Khalid Aziz
2017-01-11 16:12 ` [PATCH v4 4/4] sparc64: Add support for ADI (Application Data Integrity) Khalid Aziz
2017-01-17 4:39 ` David Miller
2017-01-17 19:32 ` Khalid Aziz
2017-01-17 19:42 ` David Miller
2017-01-17 20:12 ` Khalid Aziz
2017-01-18 0:14 ` Khalid Aziz
2017-01-11 16:33 ` [PATCH v4 0/4] Application Data Integrity feature introduced by SPARC M7 Dave Hansen
2017-01-11 16:56 ` Khalid Aziz
2017-01-11 18:13 ` Dave Hansen
2017-01-11 18:50 ` Khalid Aziz
2017-01-11 19:11 ` Dave Hansen
2017-01-12 0:22 ` Khalid Aziz
2017-01-12 0:49 ` Dave Hansen
2017-01-12 16:50 ` Khalid Aziz
2017-01-12 17:53 ` Dave Hansen
2017-01-13 0:22 ` Khalid Aziz
2017-01-13 1:31 ` Rob Gardner
2017-01-13 14:48 ` Khalid Aziz
2017-01-13 15:29 ` Rob Gardner
2017-01-13 15:59 ` Khalid Aziz
2017-01-13 16:08 ` Dave Hansen
2017-01-13 17:36 ` Rob Gardner
2017-01-17 4:47 ` David Miller
2017-01-17 21:43 ` Khalid Aziz
2017-01-17 4:42 ` David Miller
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