From b176862fca8625b0a8bee207bca9b611413e5e24 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Thu, 18 Feb 2016 21:00:41 +0100 Subject: [PATCH] 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 # Under Xen, as PV guest Signed-off-by: Borislav Petkov Cc: Andy Lutomirski Cc: Linus Torvalds Cc: Luis R. Rodriguez Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1455825641-19585-1-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar --- arch/x86/mm/dump_pagetables.c | 11 +++++------ 1 file 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) -- 2.30.2