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| author | Andy Lutomirski <luto@kernel.org> | 2017-12-12 07:56:44 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-12-23 21:13:00 +0100 |
| commit | 9f449772a3106bcdd4eb8fdeb281147b0e99fb30 (patch) | |
| tree | 42d799c62d5414452f2d9b1581cc01d3dbb9553c /Documentation/x86 | |
| parent | c1961a4631daef4aeabee8e368b1b13e8f173c91 (diff) | |
| download | linux-9f449772a3106bcdd4eb8fdeb281147b0e99fb30.tar.gz linux-9f449772a3106bcdd4eb8fdeb281147b0e99fb30.tar.bz2 linux-9f449772a3106bcdd4eb8fdeb281147b0e99fb30.zip | |
x86/mm/64: Make a full PGD-entry size hole in the memory map
Shrink vmalloc space from 16384TiB to 12800TiB to enlarge the hole starting
at 0xff90000000000000 to be a full PGD entry.
A subsequent patch will use this hole for the pagetable isolation LDT
alias.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/x86_64/mm.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt index 51101708a03a..496a1dbf139d 100644 --- a/Documentation/x86/x86_64/mm.txt +++ b/Documentation/x86/x86_64/mm.txt @@ -29,8 +29,8 @@ Virtual memory map with 5 level page tables: hole caused by [56:63] sign extension ff00000000000000 - ff0fffffffffffff (=52 bits) guard hole, reserved for hypervisor ff10000000000000 - ff8fffffffffffff (=55 bits) direct mapping of all phys. memory -ff90000000000000 - ff91ffffffffffff (=49 bits) hole -ff92000000000000 - ffd1ffffffffffff (=54 bits) vmalloc/ioremap space +ff90000000000000 - ff9fffffffffffff (=52 bits) hole +ffa0000000000000 - ffd1ffffffffffff (=54 bits) vmalloc/ioremap space (12800 TB) ffd2000000000000 - ffd3ffffffffffff (=49 bits) hole ffd4000000000000 - ffd5ffffffffffff (=49 bits) virtual memory map (512TB) ... unused hole ... |