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    Subject[PATCH 15/25][V3] introducing paravirt_activate_mm
    Date
    This function/macro will allow a paravirt guest to be notified we changed
    the current task cr3, and act upon it. It's up to them

    Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
    ---
    include/asm-x86_64/mmu_context.h | 17 ++++++++++++++---
    1 files changed, 14 insertions(+), 3 deletions(-)

    diff --git a/include/asm-x86_64/mmu_context.h b/include/asm-x86_64/mmu_context.h
    index 9592698..77ce047 100644
    --- a/include/asm-x86_64/mmu_context.h
    +++ b/include/asm-x86_64/mmu_context.h
    @@ -7,7 +7,16 @@
    #include <asm/pda.h>
    #include <asm/pgtable.h>
    #include <asm/tlbflush.h>
    +
    +#ifdef CONFIG_PARAVIRT
    +#include <asm/paravirt.h>
    +#else
    #include <asm-generic/mm_hooks.h>
    +static inline void paravirt_activate_mm(struct mm_struct *prev,
    + struct mm_struct *next)
    +{
    +}
    +#endif /* CONFIG_PARAVIRT */

    /*
    * possibly do the LDT unload here?
    @@ -67,8 +76,10 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
    asm volatile("movl %0,%%fs"::"r"(0)); \
    } while(0)

    -#define activate_mm(prev, next) \
    - switch_mm((prev),(next),NULL)
    -
    +#define activate_mm(prev, next) \
    +do { \
    + paravirt_activate_mm(prev, next); \
    + switch_mm((prev),(next),NULL); \
    +} while (0)

    #endif
    --
    1.4.4.2
    -
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