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| author |   Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-02 19:27:14 +0200 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:14 +0200 |
| commit | d6dd61c831226f9cd7750885da04d360d6455101 (patch) | |
| tree | 30f84a429821d207f7de5dd6225d3d9515042c0a /include/asm-i386/paravirt.h | |
| parent | [PATCH] i386: PARAVIRT: Allow paravirt backend to choose kernel PMD sharing (diff) | |
| download | linux-dev-d6dd61c831226f9cd7750885da04d360d6455101.tar.xz linux-dev-d6dd61c831226f9cd7750885da04d360d6455101.zip | |
[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction
Add hooks to allow a paravirt implementation to track the lifetime of
an mm. Paravirtualization requires three hooks, but only two are
needed in common code. They are:
arch_dup_mmap, which is called when a new mmap is created at fork
arch_exit_mmap, which is called when the last process reference to an
mm is dropped, which typically happens on exit and exec.
The third hook is activate_mm, which is called from the arch-specific
activate_mm() macro/function, and so doesn't need stub versions for
other architectures. It's called when an mm is first used.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: linux-arch@vger.kernel.org
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-i386/paravirt.h')
| -rw-r--r-- | include/asm-i386/paravirt.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h index f93599dc7756..61c03f1e0c29 100644 --- a/include/asm-i386/paravirt.h +++ b/include/asm-i386/paravirt.h @@ -119,6 +119,12 @@ struct paravirt_ops void (*io_delay)(void); + void (*activate_mm)(struct mm_struct *prev, + struct mm_struct *next); + void (*dup_mmap)(struct mm_struct *oldmm, + struct mm_struct *mm); + void (*exit_mmap)(struct mm_struct *mm); + #ifdef CONFIG_X86_LOCAL_APIC void (*apic_write)(unsigned long reg, unsigned long v); void (*apic_write_atomic)(unsigned long reg, unsigned long v); @@ -395,6 +401,23 @@ static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip, } #endif +static inline void paravirt_activate_mm(struct mm_struct *prev, + struct mm_struct *next) +{ + paravirt_ops.activate_mm(prev, next); +} + +static inline void arch_dup_mmap(struct mm_struct *oldmm, + struct mm_struct *mm) +{ + paravirt_ops.dup_mmap(oldmm, mm); +} + +static inline void arch_exit_mmap(struct mm_struct *mm) +{ + paravirt_ops.exit_mmap(mm); +} + #define __flush_tlb() paravirt_ops.flush_tlb_user() #define __flush_tlb_global() paravirt_ops.flush_tlb_kernel() #define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr) |