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Groups > linux.kernel > #1270816
| From | Dave Hansen <dave@sr71.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 31/37] x86: wire up mprotect_key() system call |
| Date | 2015-11-17 04:40 +0100 |
| Message-ID | <qvFhF-7YL-53@gated-at.bofh.it> (permalink) |
| References | <qvFhE-7YL-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Dave Hansen <dave.hansen@linux.intel.com> This is all that we need to get the new system call itself working on x86. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-api@vger.kernel.org --- b/arch/x86/entry/syscalls/syscall_32.tbl | 1 + b/arch/x86/entry/syscalls/syscall_64.tbl | 1 + b/arch/x86/include/uapi/asm/mman.h | 6 ++++++ b/mm/Kconfig | 1 + 4 files changed, 9 insertions(+) diff -puN arch/x86/entry/syscalls/syscall_32.tbl~pkeys-16-x86-mprotect_key arch/x86/entry/syscalls/syscall_32.tbl --- a/arch/x86/entry/syscalls/syscall_32.tbl~pkeys-16-x86-mprotect_key 2015-11-16 12:36:30.650682386 -0800 +++ b/arch/x86/entry/syscalls/syscall_32.tbl 2015-11-16 19:21:56.328145123 -0800 @@ -383,3 +383,4 @@ 374 i386 userfaultfd sys_userfaultfd 375 i386 membarrier sys_membarrier 376 i386 mlock2 sys_mlock2 +377 i386 pkey_mprotect sys_pkey_mprotect diff -puN arch/x86/entry/syscalls/syscall_64.tbl~pkeys-16-x86-mprotect_key arch/x86/entry/syscalls/syscall_64.tbl --- a/arch/x86/entry/syscalls/syscall_64.tbl~pkeys-16-x86-mprotect_key 2015-11-16 12:36:30.652682477 -0800 +++ b/arch/x86/entry/syscalls/syscall_64.tbl 2015-11-16 19:21:56.328145123 -0800 @@ -332,6 +332,7 @@ 323 common userfaultfd sys_userfaultfd 324 common membarrier sys_membarrier 325 common mlock2 sys_mlock2 +326 common pkey_mprotect sys_pkey_mprotect # # x32-specific system call numbers start at 512 to avoid cache impact diff -puN arch/x86/include/uapi/asm/mman.h~pkeys-16-x86-mprotect_key arch/x86/include/uapi/asm/mman.h --- a/arch/x86/include/uapi/asm/mman.h~pkeys-16-x86-mprotect_key 2015-11-16 12:36:30.653682522 -0800 +++ b/arch/x86/include/uapi/asm/mman.h 2015-11-16 12:36:30.659682794 -0800 @@ -20,6 +20,12 @@ ((vm_flags) & VM_PKEY_BIT1 ? _PAGE_PKEY_BIT1 : 0) | \ ((vm_flags) & VM_PKEY_BIT2 ? _PAGE_PKEY_BIT2 : 0) | \ ((vm_flags) & VM_PKEY_BIT3 ? _PAGE_PKEY_BIT3 : 0)) + +#define arch_calc_vm_prot_bits(prot, key) ( \ + ((key) & 0x1 ? VM_PKEY_BIT0 : 0) | \ + ((key) & 0x2 ? VM_PKEY_BIT1 : 0) | \ + ((key) & 0x4 ? VM_PKEY_BIT2 : 0) | \ + ((key) & 0x8 ? VM_PKEY_BIT3 : 0)) #endif #include <asm-generic/mman.h> diff -puN mm/Kconfig~pkeys-16-x86-mprotect_key mm/Kconfig --- a/mm/Kconfig~pkeys-16-x86-mprotect_key 2015-11-16 12:36:30.655682613 -0800 +++ b/mm/Kconfig 2015-11-16 12:36:30.659682794 -0800 @@ -679,4 +679,5 @@ config NR_PROTECTION_KEYS # Everything supports a _single_ key, so allow folks to # at least call APIs that take keys, but require that the # key be 0. + default 16 if X86_INTEL_MEMORY_PROTECTION_KEYS default 1 _ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 31/37] x86: wire up mprotect_key() system call Dave Hansen <dave@sr71.net> - 2015-11-17 04:40 +0100
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