From d84bb709aa4a6a155b1aaaf449cad21f02be4594 Mon Sep 17 00:00:00 2001 From: Khalid Aziz Date: Wed, 21 Feb 2018 10:15:43 -0700 Subject: [PATCH] signals, sparc: Add signal codes for ADI violations 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 Cc: Khalid Aziz Reviewed-by: Anthony Yznaga Acked-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- 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 0d930d8987cc..838a4dc90a6d 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 != 11); BUILD_BUG_ON(NSIGFPE != 13); - 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 99c902e460c2..a01fd0a92b1b 100644 --- a/include/uapi/asm-generic/siginfo.h +++ b/include/uapi/asm-generic/siginfo.h @@ -246,7 +246,10 @@ typedef struct siginfo { #else # define SEGV_PKUERR 4 /* failed protection key checks */ #endif -#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