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@xxxxxxxxxx> Cc: Khalid Aziz <khalid@xxxxxxxxxxxxxx> --- 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