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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, virtualization@lists.osdl.org,
xen-devel@lists.xensource.com, Chris Wright <chris@sous-sol.org>,
Zachary Amsden <zach@vmware.com>, Andi Kleen <ak@muc.de>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: [patch 10/20] XEN-paravirt: mm lifetime hooks
Date: Fri, 12 Jan 2007 17:45:49 -0800 [thread overview]
Message-ID: <20070113014648.102890184@goop.org> (raw)
In-Reply-To: <20070113014539.408244126@goop.org>
[-- Attachment #1: mm-lifetime-hooks.patch --]
[-- Type: text/plain, Size: 4238 bytes --]
Add hooks to allow a paravirt implementation to track the lifetime of
an mm. Unfortunately dup_mmap and exit_mmap are in generic code, so
we need to #ifdef CONFIG_PARAVIRT.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chris@sous-sol.org>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
--
arch/i386/kernel/paravirt.c | 4 ++++
include/asm-i386/mmu_context.h | 8 ++++++--
include/asm-i386/paravirt.h | 38 ++++++++++++++++++++++++++++++++++++++
kernel/fork.c | 3 +++
mm/mmap.c | 4 ++++
5 files changed, 55 insertions(+), 2 deletions(-)
===================================================================
--- a/arch/i386/kernel/paravirt.c
+++ b/arch/i386/kernel/paravirt.c
@@ -706,6 +706,10 @@ struct paravirt_ops paravirt_ops = {
.irq_enable_sysexit = native_irq_enable_sysexit,
.iret = native_iret,
+ .dup_mmap = (void *)native_nop,
+ .exit_mmap = (void *)native_nop,
+ .activate_mm = (void *)native_nop,
+
.startup_ipi_hook = (void *)native_nop,
};
===================================================================
--- a/include/asm-i386/mmu_context.h
+++ b/include/asm-i386/mmu_context.h
@@ -5,6 +5,7 @@
#include <asm/atomic.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
+#include <asm/paravirt.h>
/*
* Used for LDT copy/destruction.
@@ -65,7 +66,10 @@ static inline void switch_mm(struct mm_s
#define deactivate_mm(tsk, mm) \
asm("movl %0,%%gs": :"r" (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
===================================================================
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -126,6 +126,12 @@ struct paravirt_ops
void (fastcall *io_delay)(void);
void (*const_udelay)(unsigned long loops);
+ void (fastcall *activate_mm)(struct mm_struct *prev,
+ struct mm_struct *next);
+ void (fastcall *dup_mmap)(struct mm_struct *oldmm,
+ struct mm_struct *mm);
+ void (fastcall *exit_mmap)(struct mm_struct *mm);
+
#ifdef CONFIG_X86_LOCAL_APIC
void (fastcall *apic_write)(unsigned long reg, unsigned long v);
void (fastcall *apic_write_atomic)(unsigned long reg, unsigned long v);
@@ -429,6 +435,23 @@ static inline void startup_ipi_hook(int
}
#endif
+static inline void paravirt_activate_mm(struct mm_struct *prev,
+ struct mm_struct *next)
+{
+ paravirt_ops.activate_mm(prev, next);
+}
+
+static inline void paravirt_dup_mmap(struct mm_struct *oldmm,
+ struct mm_struct *mm)
+{
+ paravirt_ops.dup_mmap(oldmm, mm);
+}
+
+static inline void paravirt_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)
@@ -673,5 +696,20 @@ static inline void paravirt_pagetable_se
set_pgd(&base[0], base[USER_PTRS_PER_PGD]);
#endif
}
+
+static inline void paravirt_activate_mm(struct mm_struct *prev,
+ struct mm_struct *next)
+{
+}
+
+static inline void paravirt_dup_mmap(struct mm_struct *oldmm,
+ struct mm_struct *mm)
+{
+}
+
+static inline void paravirt_exit_mmap(struct mm_struct *mm)
+{
+}
+
#endif /* CONFIG_PARAVIRT */
#endif /* __ASM_PARAVIRT_H */
===================================================================
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -287,6 +287,9 @@ static inline int dup_mmap(struct mm_str
if (retval)
goto out;
}
+#ifdef CONFIG_PARAVIRT
+ paravirt_dup_mmap(oldmm, mm);
+#endif
retval = 0;
out:
up_write(&mm->mmap_sem);
===================================================================
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1969,6 +1969,10 @@ void exit_mmap(struct mm_struct *mm)
struct vm_area_struct *vma = mm->mmap;
unsigned long nr_accounted = 0;
unsigned long end;
+
+#ifdef CONFIG_PARAVIRT
+ paravirt_exit_mmap(mm);
+#endif
lru_add_drain();
flush_cache_mm(mm);
--
next prev parent reply other threads:[~2007-01-13 23:11 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-13 1:45 [patch 00/20] XEN-paravirt: Xen guest implementation for paravirt_ops interface Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 01/20] XEN-paravirt: Fix typo in sync_constant_test_bit()s name Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 02/20] XEN-paravirt: Add a flag to allow the VGA console to be disabled Jeremy Fitzhardinge
2007-01-14 0:27 ` [Xen-devel] " Alan
2007-01-13 1:45 ` [patch 03/20] XEN-paravirt: paravirt: page-table accessors Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 04/20] XEN-paravirt: paravirt pagetable init Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 05/20] XEN-paravirt: paravirt: reserve fixmap slot Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 06/20] XEN-paravirt: remove pgd ctor Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 07/20] XEN-paravirt: paravirt shared kernel pmd flag Jeremy Fitzhardinge
2007-01-15 8:59 ` [Xen-devel] " Jan Beulich
2007-01-13 1:45 ` [patch 08/20] XEN-paravirt: paravirt pgd allocation alignment Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 09/20] XEN-paravirt: dont export paravirt_ops structure, do individual functions Jeremy Fitzhardinge
2007-01-14 0:57 ` Rusty Russell
2007-01-13 1:45 ` Jeremy Fitzhardinge [this message]
2007-01-13 1:45 ` [patch 11/20] XEN-paravirt: Add apply_to_page_range() which applies a function to a pte range Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 12/20] XEN-paravirt: Xen: Add nosegneg capability to the vsyscall page notes Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 13/20] XEN-paravirt: Xen: Add config options and disable unsupported config options Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 15/20] XEN-paravirt: Xen: core paravirt guest changes Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 16/20] XEN-paravirt: Add the Xen virtual console driver Jeremy Fitzhardinge
2007-01-14 0:37 ` Alan
2007-01-14 0:35 ` Jeremy Fitzhardinge
2007-01-15 13:03 ` Pavel Machek
2007-01-19 4:11 ` Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 17/20] XEN-paravirt: Add Xen grant table support Jeremy Fitzhardinge
2007-01-15 13:05 ` Pavel Machek
2007-01-19 4:07 ` Jeremy Fitzhardinge
2007-01-13 1:45 ` [patch 18/20] XEN-paravirt: Add Xen driver utility functions Jeremy Fitzhardinge
2007-01-14 7:41 ` Greg KH
2007-01-13 1:45 ` [patch 19/20] XEN-paravirt: Add the Xenbus sysfs and virtual device hotplug driver Jeremy Fitzhardinge
2007-01-15 13:18 ` Pavel Machek
2007-01-13 1:45 ` [patch 20/20] XEN-paravirt: Add Xen virtual block device driver Jeremy Fitzhardinge
2007-01-14 1:07 ` Arjan van de Ven
2007-01-14 7:43 ` Greg KH
2007-01-16 2:53 ` [Xen-devel] " Mark Williamson
2007-01-14 11:05 ` Jan Engelhardt
2007-01-14 11:24 ` Muli Ben-Yehuda
2007-01-14 11:35 ` Jan Engelhardt
2007-01-14 12:37 ` Keir Fraser
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