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 v10 01/10] signals, sparc: Add signal codes for ADI violations
Date: Wed, 15 Nov 2017 15:46:16 -0700 [thread overview]
Message-ID: <b52fbbf0de4a0aaeef31b0e0919eeedf5950cf9f.1510768775.git.khalid.aziz@oracle.com> (raw)
In-Reply-To: <cover.1510768775.git.khalid.aziz@oracle.com>
In-Reply-To: <cover.1510768775.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>
---
v10:
- Updated si_code definitions to match other definitions
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 8c6da1a643da..20be1bc923f9 100644
--- a/arch/x86/kernel/signal_compat.c
+++ b/arch/x86/kernel/signal_compat.c
@@ -27,7 +27,7 @@ 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 e447283b8f52..279b7c0d2977 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -202,7 +202,10 @@ typedef struct siginfo {
#define SEGV_ACCERR 2 /* invalid permissions for mapped object */
#define SEGV_BNDERR 3 /* failed address bound checks */
#define SEGV_PKUERR 4 /* failed protection key checks */
-#define NSIGSEGV 4
+#define SEGV_ACCADI 5 /* ADI not enabled for mapped object */
+#define SEGV_ADIDERR 6 /* Disrupting MCD error */
+#define SEGV_ADIPERR 7 /* Precise MCD exception */
+#define NSIGSEGV 7
/*
* SIGBUS si_codes
--
2.11.0
next prev parent reply other threads:[~2017-11-15 22:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 22:46 [PATCH v10 00/10] Application Data Integrity feature introduced by SPARC M7 Khalid Aziz
2017-11-15 22:46 ` Khalid Aziz [this message]
2017-11-15 22:46 ` [PATCH v10 02/10] mm, swap: Add infrastructure for saving page metadata as well on swap Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 03/10] sparc64: Add support for ADI register fields, ASIs and traps Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 04/10] sparc64: Add HV fault type handlers for ADI related faults Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 05/10] sparc64: Add handler for "Memory Corruption Detected" trap Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 06/10] sparc64: Add auxiliary vectors to report platform ADI properties Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 07/10] mm: Add address parameter to arch_validate_prot() Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 08/10] mm: Clear arch specific VM flags on protection change Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 09/10] mm: Allow arch code to override copy_highpage() Khalid Aziz
2017-11-15 22:46 ` [PATCH v10 10/10] sparc64: Add support for ADI (Application Data Integrity) Khalid Aziz
2017-11-17 2:14 ` [PATCH RESEND v10 00/10] Application Data Integrity feature introduced by SPARC M7 Anthony Yznaga
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