From: Ross McIlroy <ross.mcilroy@gmail.com>
To: Mark Williamson <mark.williamson@cl.cam.ac.uk>
Cc: cwc22@cam.ac.uk, xen-devel@lists.xensource.com,
Ross C Mcilroy <mcilrorc@dcs.gla.ac.uk>
Subject: [Patch] allocate_empty_lowmem_region in non-privileged domains
Date: Tue, 2 Aug 2005 16:11:35 +0100 [thread overview]
Message-ID: <7f4e21e3050802081163cf5fa3@mail.gmail.com> (raw)
In-Reply-To: <200508021430.22795.mark.williamson@cl.cam.ac.uk>
[-- Attachment #1: Type: text/plain, Size: 1905 bytes --]
Below is a patch to the enable allocate_empty_lowmem_region in
on-privileged domains, so that backend drivers can map granted foreign
pages even if they are running in an unprivileged domain. (as per the
"allocate_empty_lowmem_region hypervisor function" thread discussion)
Thanks
Ross
# HG changeset patch
# User rcmcilro@localhost.localdomain
# Node ID b235cde45efbb903d3e0e9626df6a90adde20577
# Parent 2f743309f21afdc6adaef01421da40f7ff1e8b0d
Add allocate_empty_lowmem_region() for unprivileged domains
diff -r 2f743309f21a -r b235cde45efb
linux-2.6-xen-sparse/arch/xen/i386/mm/hypervisor.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/hypervisor.c Tue Aug 2
12:37:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/hypervisor.c Tue Aug 2
13:58:30 2005
@@ -35,6 +35,7 @@
#include <asm/pgtable.h>
#include <asm-xen/hypervisor.h>
#include <asm-xen/balloon.h>
+#include <linux/module.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
#include <linux/percpu.h>
#include <asm/tlbflush.h>
@@ -312,7 +313,6 @@
balloon_unlock(flags);
}
-#ifdef CONFIG_XEN_PHYSDEV_ACCESS
unsigned long allocate_empty_lowmem_region(unsigned long pages)
{
@@ -360,4 +360,4 @@
return vstart;
}
-#endif /* CONFIG_XEN_PHYSDEV_ACCESS */
+EXPORT_SYMBOL(allocate_empty_lowmem_region);
diff -r 2f743309f21a -r b235cde45efb
linux-2.6-xen-sparse/include/asm-xen/hypervisor.h
--- a/linux-2.6-xen-sparse/include/asm-xen/hypervisor.h Tue Aug 2 12:37:37 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/hypervisor.h Tue Aug 2 13:58:30 2005
@@ -136,10 +136,8 @@
void xen_contig_memory(unsigned long vstart, unsigned int order);
-#ifdef CONFIG_XEN_PHYSDEV_ACCESS
/* Allocate a contiguous empty region of low memory. Return virtual start. */
unsigned long allocate_empty_lowmem_region(unsigned long pages);
-#endif
#include <asm/hypercall.h>
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: allocate_empty_lowmem_region.patch --]
[-- Type: text/x-patch; name="allocate_empty_lowmem_region.patch", Size: 1559 bytes --]
# HG changeset patch
# User rcmcilro@localhost.localdomain
# Node ID b235cde45efbb903d3e0e9626df6a90adde20577
# Parent 2f743309f21afdc6adaef01421da40f7ff1e8b0d
Add allocate_empty_lowmem_region() for unprivileged domains
diff -r 2f743309f21a -r b235cde45efb linux-2.6-xen-sparse/arch/xen/i386/mm/hypervisor.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/hypervisor.c Tue Aug 2 12:37:37 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/hypervisor.c Tue Aug 2 13:58:30 2005
@@ -35,6 +35,7 @@
#include <asm/pgtable.h>
#include <asm-xen/hypervisor.h>
#include <asm-xen/balloon.h>
+#include <linux/module.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
#include <linux/percpu.h>
#include <asm/tlbflush.h>
@@ -312,7 +313,6 @@
balloon_unlock(flags);
}
-#ifdef CONFIG_XEN_PHYSDEV_ACCESS
unsigned long allocate_empty_lowmem_region(unsigned long pages)
{
@@ -360,4 +360,4 @@
return vstart;
}
-#endif /* CONFIG_XEN_PHYSDEV_ACCESS */
+EXPORT_SYMBOL(allocate_empty_lowmem_region);
diff -r 2f743309f21a -r b235cde45efb linux-2.6-xen-sparse/include/asm-xen/hypervisor.h
--- a/linux-2.6-xen-sparse/include/asm-xen/hypervisor.h Tue Aug 2 12:37:37 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/hypervisor.h Tue Aug 2 13:58:30 2005
@@ -136,10 +136,8 @@
void xen_contig_memory(unsigned long vstart, unsigned int order);
-#ifdef CONFIG_XEN_PHYSDEV_ACCESS
/* Allocate a contiguous empty region of low memory. Return virtual start. */
unsigned long allocate_empty_lowmem_region(unsigned long pages);
-#endif
#include <asm/hypercall.h>
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next prev parent reply other threads:[~2005-08-02 15:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <260002866C8EBA4EA0AD853F467EC11E04ACDB@EX2.ad.dcs.gla.ac.uk>
2005-08-02 12:48 ` allocate_empty_lowmem_region hypervisor function Mark Williamson
2005-08-02 13:20 ` Ross McIlroy
2005-08-02 13:30 ` Mark Williamson
2005-08-02 15:11 ` Ross McIlroy [this message]
2005-08-02 15:58 ` [Patch] allocate_empty_lowmem_region in non-privileged domains Mark Williamson
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