| Message ID | b1712b03774934c31afd9e394f07aae51eca74f8.1519227112.git.khalid.aziz@oracle.com |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | Application Data Integrity feature introduced by SPARC M7 | expand |
Khalid Aziz <khalid.aziz@oracle.com> writes: > 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> > Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> > --- > 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 ac057f9b0763..41cf5996a2a9 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 85dc965afd89..e94f03b3ee6f 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 -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c index ac057f9b0763..41cf5996a2a9 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 85dc965afd89..e94f03b3ee6f 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