diff options
| author | Borislav Petkov <bp@suse.de> | 2016-02-18 21:00:41 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-20 12:25:45 +0100 |
| commit | b176862fca8625b0a8bee207bca9b611413e5e24 (patch) | |
| tree | 8eda626b3badfaf2222caaeb8576f001a726006a /arch/x86 | |
| parent | e2c7698cd61f11d4077fdb28148b2d31b82ac848 (diff) | |
| download | linux-b176862fca8625b0a8bee207bca9b611413e5e24.tar.gz linux-b176862fca8625b0a8bee207bca9b611413e5e24.tar.bz2 linux-b176862fca8625b0a8bee207bca9b611413e5e24.zip | |
x86/mm/ptdump: Remove paravirt_enabled()
is_hypervisor_range() can simply check if the PGD index is
within ffff800000000000 - ffff87ffffffffff which is the range
reserved for a hypervisor. That range is practically an ABI, see
Documentation/x86/x86_64/mm.txt.
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> # Under Xen, as PV guest
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1455825641-19585-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/mm/dump_pagetables.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 4a6f1d9b5106..99bfb192803f 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -358,20 +358,19 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t addr, #define pgd_none(a) pud_none(__pud(pgd_val(a))) #endif -#ifdef CONFIG_X86_64 static inline bool is_hypervisor_range(int idx) { +#ifdef CONFIG_X86_64 /* * ffff800000000000 - ffff87ffffffffff is reserved for * the hypervisor. */ - return paravirt_enabled() && - (idx >= pgd_index(__PAGE_OFFSET) - 16) && - (idx < pgd_index(__PAGE_OFFSET)); -} + return (idx >= pgd_index(__PAGE_OFFSET) - 16) && + (idx < pgd_index(__PAGE_OFFSET)); #else -static inline bool is_hypervisor_range(int idx) { return false; } + return false; #endif +} static void ptdump_walk_pgd_level_core(struct seq_file *m, pgd_t *pgd, bool checkwx) |