user/sven/linux.git/include/linux/kaiser.h, branch v4.9.202Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v4.9.2022018-02-22T14:43:55Zx86: fix build warnign with 32-bit PAE2018-02-22T14:43:55ZArnd Bergmannarnd@arndb.de2018-02-15T15:16:57Zurn:sha1:95a440bc9f4dd1a865dfa00c49b664b951a492a3
I ran into a 4.9 build warning in randconfig testing, starting with the
KAISER patches:
arch/x86/kernel/ldt.c: In function 'alloc_ldt_struct':
arch/x86/include/asm/pgtable_types.h:208:24: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
^
arch/x86/kernel/ldt.c:81:6: note: in expansion of macro '__PAGE_KERNEL'
__PAGE_KERNEL);
^~~~~~~~~~~~~
I originally ran into this last year when the patches were part of linux-next,
and tried to work around it by using the proper 'pteval_t' types consistently,
but that caused additional problems.
This takes a much simpler approach, and makes the argument type of the dummy
helper always 64-bit, which is wide enough for any page table layout and
won't hurt since this call is just an empty stub anyway.
Fixes: 8f0baadf2bea ("kaiser: merged update")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
KPTI: Rename to PAGE_TABLE_ISOLATION2018-01-05T14:46:35ZKees Cookkeescook@chromium.org2018-01-03T18:17:35Zurn:sha1:e71fac01727a9495f08de9db5259089bee311766
This renames CONFIG_KAISER to CONFIG_PAGE_TABLE_ISOLATION.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE2018-01-05T14:46:32ZHugh Dickinshughd@google.com2017-09-04T01:57:03Zurn:sha1:0994a2cf8fe4e884bad4810681117a7d0096c8e7
Kaiser only needs to map one page of the stack; and
kernel/fork.c did not build on powerpc (no __PAGE_KERNEL).
It's all cleaner if linux/kaiser.h provides kaiser_map_thread_stack()
and kaiser_unmap_thread_stack() wrappers around asm/kaiser.h's
kaiser_add_mapping() and kaiser_remove_mapping(). And use
linux/kaiser.h in init/main.c to avoid the #ifdefs there.
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kaiser: merged update2018-01-05T14:46:32ZDave Hansendave.hansen@linux.intel.com2017-08-30T23:23:00Zurn:sha1:8f0baadf2bea3861217763734b57e1dd2db703dd
Merged fixes and cleanups, rebased to 4.9.51 tree (no 5-level paging).
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>