diff options
| author | Dave Hansen <dave.hansen@linux.intel.com> | 2017-08-30 16:23:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-05 15:44:23 +0100 |
| commit | bed9bb7f3e6d4045013d2bb9e4004896de57f02b (patch) | |
| tree | 25284cd383867826b0303949ed3bd1ecdee87a68 /arch/x86/kernel/espfix_64.c | |
| parent | 8a43ddfb93a0c6ae1a6e1f5c25705ec5d1843c40 (diff) | |
kaiser: merged update
Merged fixes and cleanups, rebased to 4.4.89 tree (no 5-level paging).
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/espfix_64.c')
| -rw-r--r-- | arch/x86/kernel/espfix_64.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/kernel/espfix_64.c b/arch/x86/kernel/espfix_64.c index bd1358d55146..54de4c70cbd6 100644 --- a/arch/x86/kernel/espfix_64.c +++ b/arch/x86/kernel/espfix_64.c @@ -127,11 +127,14 @@ void __init init_espfix_bsp(void) /* Install the espfix pud into the kernel page directory */ pgd_p = &init_level4_pgt[pgd_index(ESPFIX_BASE_ADDR)]; pgd_populate(&init_mm, pgd_p, (pud_t *)espfix_pud_page); -#ifdef CONFIG_KAISER - // add the esp stack pud to the shadow mapping here. - // This can be done directly, because the fixup stack has its own pud - set_pgd(native_get_shadow_pgd(pgd_p), __pgd(_PAGE_TABLE | __pa((pud_t *)espfix_pud_page))); -#endif + /* + * Just copy the top-level PGD that is mapping the espfix + * area to ensure it is mapped into the shadow user page + * tables. + */ + if (IS_ENABLED(CONFIG_KAISER)) + set_pgd(native_get_shadow_pgd(pgd_p), + __pgd(_KERNPG_TABLE | __pa((pud_t *)espfix_pud_page))); /* Randomize the locations */ init_espfix_random(); |