Re: [Xen-devel] [PATCH v2 3/3] paravirt: rename paravirt_enabled to paravirt_legacy

[Borislav Petkov <bp@xxxxxxxxx>]

On Wed, Feb 17, 2016 at 12:07:13PM -0800, Luis R. Rodriguez wrote:
> OK so here's a wiki to keep track of progress of the difference uses:
> 
> http://kernelnewbies.org/KernelProjects/remove-paravirt-enabled
> 
> It seems we have a resolution one way or another for all except for
> the use on arch/x86/mm/dump_pagetables.c, is that right?

Why not?

I think we should simply check the range as ffff800000000000 -
ffff87ffffffffff is practically an ABI and nothing should be mapped
there anyway. No need for paravirt_enabled() there either.

---
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 4a6f1d9b5106..de1ee3a40250 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -358,20 +358,20 @@ 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) &&
+       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)


-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

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