# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1316171966 -3600
# Node ID 483c5f8319adafd61510d3a1ea085a7aec329a2d
# Parent ed7586b1d515611e713b6ace72103e08d10a3347
mem_event: use different ringbuffers for share, paging and access
Up to now a single ring buffer was used for mem_share, xenpaging and
xen-access. Each helper would have to cooperate and pull only its own
requests from the ring. Unfortunately this was not implemented. And
even if it was, it would make the whole concept fragile because a crash
or early exit of one helper would stall the others.
What happend up to now is that active xenpaging + memory_sharing would
push memsharing requests in the buffer. xenpaging is not prepared for
such requests.
This patch creates an independet ring buffer for mem_share, xenpaging
and xen-access and adds also new functions to enable xenpaging and
xen-access. The xc_mem_event_enable/xc_mem_event_disable functions will
be removed. The various XEN_DOMCTL_MEM_EVENT_* macros were cleaned up.
Due to the removal the API changed, so the SONAME will be changed too.
Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Acked-by: Tim Deegan <tim@xxxxxxx>
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Committed-by: Tim Deegan <tim@xxxxxxx>
---
diff -r ed7586b1d515 -r 483c5f8319ad tools/libxc/Makefile
--- a/tools/libxc/Makefile Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/libxc/Makefile Fri Sep 16 12:19:26 2011 +0100
@@ -1,7 +1,7 @@
XEN_ROOT = $(CURDIR)/../..
include $(XEN_ROOT)/tools/Rules.mk
-MAJOR = 4.0
+MAJOR = 4.2
MINOR = 0
CTRL_SRCS-y :=
diff -r ed7586b1d515 -r 483c5f8319ad tools/libxc/xc_mem_access.c
--- a/tools/libxc/xc_mem_access.c Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/libxc/xc_mem_access.c Fri Sep 16 12:19:26 2011 +0100
@@ -24,12 +24,29 @@
#include "xc_private.h"
+int xc_mem_access_enable(xc_interface *xch, domid_t domain_id,
+ void *shared_page, void *ring_page)
+{
+ return xc_mem_event_control(xch, domain_id,
+ XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE,
+ XEN_DOMCTL_MEM_EVENT_OP_ACCESS,
+ shared_page, ring_page, INVALID_MFN);
+}
+
+int xc_mem_access_disable(xc_interface *xch, domid_t domain_id)
+{
+ return xc_mem_event_control(xch, domain_id,
+ XEN_DOMCTL_MEM_EVENT_OP_ACCESS_DISABLE,
+ XEN_DOMCTL_MEM_EVENT_OP_ACCESS,
+ NULL, NULL, INVALID_MFN);
+}
+
int xc_mem_access_resume(xc_interface *xch, domid_t domain_id, unsigned long
gfn)
{
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_ACCESS_RESUME,
- XEN_DOMCTL_MEM_EVENT_OP_ACCESS, NULL, NULL,
- gfn);
+ XEN_DOMCTL_MEM_EVENT_OP_ACCESS,
+ NULL, NULL, gfn);
}
/*
diff -r ed7586b1d515 -r 483c5f8319ad tools/libxc/xc_mem_event.c
--- a/tools/libxc/xc_mem_event.c Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/libxc/xc_mem_event.c Fri Sep 16 12:19:26 2011 +0100
@@ -42,18 +42,3 @@
return do_domctl(xch, &domctl);
}
-int xc_mem_event_enable(xc_interface *xch, domid_t domain_id,
- void *shared_page, void *ring_page)
-{
- return xc_mem_event_control(xch, domain_id,
- XEN_DOMCTL_MEM_EVENT_OP_ENABLE, 0,
- shared_page, ring_page, INVALID_MFN);
-}
-
-int xc_mem_event_disable(xc_interface *xch, domid_t domain_id)
-{
- return xc_mem_event_control(xch, domain_id,
- XEN_DOMCTL_MEM_EVENT_OP_DISABLE, 0,
- NULL, NULL, INVALID_MFN);
-}
-
diff -r ed7586b1d515 -r 483c5f8319ad tools/libxc/xc_mem_paging.c
--- a/tools/libxc/xc_mem_paging.c Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/libxc/xc_mem_paging.c Fri Sep 16 12:19:26 2011 +0100
@@ -24,36 +24,53 @@
#include "xc_private.h"
+int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id,
+ void *shared_page, void *ring_page)
+{
+ return xc_mem_event_control(xch, domain_id,
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING_ENABLE,
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING,
+ shared_page, ring_page, INVALID_MFN);
+}
+
+int xc_mem_paging_disable(xc_interface *xch, domid_t domain_id)
+{
+ return xc_mem_event_control(xch, domain_id,
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING_DISABLE,
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING,
+ NULL, NULL, INVALID_MFN);
+}
+
int xc_mem_paging_nominate(xc_interface *xch, domid_t domain_id, unsigned long
gfn)
{
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_PAGING_NOMINATE,
- XEN_DOMCTL_MEM_EVENT_OP_PAGING, NULL, NULL,
- gfn);
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING,
+ NULL, NULL, gfn);
}
int xc_mem_paging_evict(xc_interface *xch, domid_t domain_id, unsigned long
gfn)
{
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_PAGING_EVICT,
- XEN_DOMCTL_MEM_EVENT_OP_PAGING, NULL, NULL,
- gfn);
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING,
+ NULL, NULL, gfn);
}
int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, unsigned long gfn)
{
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_PAGING_PREP,
- XEN_DOMCTL_MEM_EVENT_OP_PAGING, NULL, NULL,
- gfn);
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING,
+ NULL, NULL, gfn);
}
int xc_mem_paging_resume(xc_interface *xch, domid_t domain_id, unsigned long
gfn)
{
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_PAGING_RESUME,
- XEN_DOMCTL_MEM_EVENT_OP_PAGING, NULL, NULL,
- gfn);
+ XEN_DOMCTL_MEM_EVENT_OP_PAGING,
+ NULL, NULL, gfn);
}
diff -r ed7586b1d515 -r 483c5f8319ad tools/libxc/xc_memshr.c
--- a/tools/libxc/xc_memshr.c Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/libxc/xc_memshr.c Fri Sep 16 12:19:26 2011 +0100
@@ -36,7 +36,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_CONTROL;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_CONTROL;
op->u.enable = enable;
return do_domctl(xch, &domctl);
@@ -55,7 +55,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GFN;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GFN;
op->u.nominate.u.gfn = gfn;
ret = do_domctl(xch, &domctl);
@@ -77,7 +77,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GREF;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GREF;
op->u.nominate.u.grant_ref = gref;
ret = do_domctl(xch, &domctl);
@@ -97,7 +97,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = 0;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_SHARE;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_SHARE;
op->u.share.source_handle = source_handle;
op->u.share.client_handle = client_handle;
@@ -114,7 +114,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_RESUME;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_RESUME;
return do_domctl(xch, &domctl);
}
@@ -130,7 +130,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GFN;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GFN;
op->u.debug.u.gfn = gfn;
return do_domctl(xch, &domctl);
@@ -147,7 +147,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_MFN;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_MFN;
op->u.debug.u.mfn = mfn;
return do_domctl(xch, &domctl);
@@ -164,7 +164,7 @@
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = (domid_t)domid;
op = &(domctl.u.mem_sharing_op);
- op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GREF;
+ op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GREF;
op->u.debug.u.gref = gref;
return do_domctl(xch, &domctl);
diff -r ed7586b1d515 -r 483c5f8319ad tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/libxc/xenctrl.h Fri Sep 16 12:19:26 2011 +0100
@@ -1758,16 +1758,19 @@
unsigned int mode, void *shared_page,
void *ring_page, unsigned long gfn);
-int xc_mem_event_enable(xc_interface *xch, domid_t domain_id,
+int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id,
void *shared_page, void *ring_page);
-int xc_mem_event_disable(xc_interface *xch, domid_t domain_id);
-
+int xc_mem_paging_disable(xc_interface *xch, domid_t domain_id);
int xc_mem_paging_nominate(xc_interface *xch, domid_t domain_id,
unsigned long gfn);
int xc_mem_paging_evict(xc_interface *xch, domid_t domain_id, unsigned long
gfn);
int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, unsigned long
gfn);
int xc_mem_paging_resume(xc_interface *xch, domid_t domain_id,
unsigned long gfn);
+
+int xc_mem_access_enable(xc_interface *xch, domid_t domain_id,
+ void *shared_page, void *ring_page);
+int xc_mem_access_disable(xc_interface *xch, domid_t domain_id);
int xc_mem_access_resume(xc_interface *xch, domid_t domain_id,
unsigned long gfn);
diff -r ed7586b1d515 -r 483c5f8319ad tools/tests/xen-access/xen-access.c
--- a/tools/tests/xen-access/xen-access.c Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/tests/xen-access/xen-access.c Fri Sep 16 12:19:26 2011 +0100
@@ -241,7 +241,7 @@
mem_event_ring_lock_init(&xenaccess->mem_event);
/* Initialise Xen */
- rc = xc_mem_event_enable(xenaccess->xc_handle,
xenaccess->mem_event.domain_id,
+ rc = xc_mem_access_enable(xenaccess->xc_handle,
xenaccess->mem_event.domain_id,
xenaccess->mem_event.shared_page,
xenaccess->mem_event.ring_page);
if ( rc != 0 )
@@ -351,7 +351,7 @@
return 0;
/* Tear down domain xenaccess in Xen */
- rc = xc_mem_event_disable(xenaccess->xc_handle,
xenaccess->mem_event.domain_id);
+ rc = xc_mem_access_disable(xenaccess->xc_handle,
xenaccess->mem_event.domain_id);
if ( rc != 0 )
{
ERROR("Error tearing down domain xenaccess in xen");
diff -r ed7586b1d515 -r 483c5f8319ad tools/xenpaging/xenpaging.c
--- a/tools/xenpaging/xenpaging.c Fri Sep 16 12:13:31 2011 +0100
+++ b/tools/xenpaging/xenpaging.c Fri Sep 16 12:19:26 2011 +0100
@@ -234,7 +234,7 @@
PAGE_SIZE);
/* Initialise Xen */
- rc = xc_mem_event_enable(xch, paging->mem_event.domain_id,
+ rc = xc_mem_paging_enable(xch, paging->mem_event.domain_id,
paging->mem_event.shared_page,
paging->mem_event.ring_page);
if ( rc != 0 )
@@ -353,7 +353,7 @@
xch = paging->xc_handle;
paging->xc_handle = NULL;
/* Tear down domain paging in Xen */
- rc = xc_mem_event_disable(xch, paging->mem_event.domain_id);
+ rc = xc_mem_paging_disable(xch, paging->mem_event.domain_id);
if ( rc != 0 )
{
ERROR("Error tearing down domain paging in xen");
diff -r ed7586b1d515 -r 483c5f8319ad xen/arch/ia64/xen/dom0_ops.c
--- a/xen/arch/ia64/xen/dom0_ops.c Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/arch/ia64/xen/dom0_ops.c Fri Sep 16 12:19:26 2011 +0100
@@ -688,7 +688,7 @@
switch(mec->op)
{
- case XEN_DOMCTL_MEM_SHARING_OP_CONTROL:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_CONTROL:
{
if (mec->u.enable) {
ret = -EINVAL; /* not implemented */
diff -r ed7586b1d515 -r 483c5f8319ad xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/arch/x86/hvm/hvm.c Fri Sep 16 12:19:26 2011 +0100
@@ -4025,7 +4025,7 @@
if ( (p & HVMPME_onchangeonly) && (value == old) )
return 1;
- rc = mem_event_check_ring(d, &d->mem_event);
+ rc = mem_event_check_ring(d, &d->mem_access);
if ( rc )
return rc;
@@ -4048,7 +4048,7 @@
req.gla_valid = 1;
}
- mem_event_put_request(d, &d->mem_event, &req);
+ mem_event_put_request(d, &d->mem_access, &req);
return 1;
}
diff -r ed7586b1d515 -r 483c5f8319ad xen/arch/x86/mm/mem_event.c
--- a/xen/arch/x86/mm/mem_event.c Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/arch/x86/mm/mem_event.c Fri Sep 16 12:19:26 2011 +0100
@@ -37,24 +37,52 @@
#define mem_event_ring_lock(_med) spin_lock(&(_med)->ring_lock)
#define mem_event_ring_unlock(_med) spin_unlock(&(_med)->ring_lock)
-static int mem_event_enable(struct domain *d, struct mem_event_domain *med,
mfn_t ring_mfn, mfn_t shared_mfn)
+static int mem_event_enable(struct domain *d,
+ xen_domctl_mem_event_op_t *mec,
+ struct mem_event_domain *med)
{
int rc;
+ struct domain *dom_mem_event = current->domain;
+ struct vcpu *v = current;
+ unsigned long ring_addr = mec->ring_addr;
+ unsigned long shared_addr = mec->shared_addr;
+ l1_pgentry_t l1e;
+ unsigned long gfn;
+ p2m_type_t p2mt;
+ mfn_t ring_mfn;
+ mfn_t shared_mfn;
+
+ /* Only one helper at a time. If the helper crashed,
+ * the ring is in an undefined state and so is the guest.
+ */
+ if ( med->ring_page )
+ return -EBUSY;
+
+ /* Get MFN of ring page */
+ guest_get_eff_l1e(v, ring_addr, &l1e);
+ gfn = l1e_get_pfn(l1e);
+ ring_mfn = gfn_to_mfn(dom_mem_event, gfn, &p2mt);
+
+ if ( unlikely(!mfn_valid(mfn_x(ring_mfn))) )
+ return -EINVAL;
+
+ /* Get MFN of shared page */
+ guest_get_eff_l1e(v, shared_addr, &l1e);
+ gfn = l1e_get_pfn(l1e);
+ shared_mfn = gfn_to_mfn(dom_mem_event, gfn, &p2mt);
+
+ if ( unlikely(!mfn_valid(mfn_x(shared_mfn))) )
+ return -EINVAL;
/* Map ring and shared pages */
med->ring_page = map_domain_page(mfn_x(ring_mfn));
- if ( med->ring_page == NULL )
- goto err;
-
med->shared_page = map_domain_page(mfn_x(shared_mfn));
- if ( med->shared_page == NULL )
- goto err_ring;
/* Allocate event channel */
rc = alloc_unbound_xen_event_channel(d->vcpu[0],
current->domain->domain_id);
if ( rc < 0 )
- goto err_shared;
+ goto err;
((mem_event_shared_page_t *)med->shared_page)->port = rc;
med->xen_port = rc;
@@ -71,14 +99,14 @@
return 0;
- err_shared:
+ err:
unmap_domain_page(med->shared_page);
med->shared_page = NULL;
- err_ring:
+
unmap_domain_page(med->ring_page);
med->ring_page = NULL;
- err:
- return 1;
+
+ return rc;
}
static int mem_event_disable(struct mem_event_domain *med)
@@ -220,86 +248,79 @@
rc = -ENOSYS;
- switch ( mec-> mode )
+ switch ( mec->mode )
{
- case 0:
+ case XEN_DOMCTL_MEM_EVENT_OP_PAGING:
{
+ struct mem_event_domain *med = &d->mem_paging;
+ rc = -ENODEV;
+ /* Only HAP is supported */
+ if ( !hap_enabled(d) )
+ break;
+
+ /* Currently only EPT is supported */
+ if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
+ break;
+
switch( mec->op )
{
- case XEN_DOMCTL_MEM_EVENT_OP_ENABLE:
+ case XEN_DOMCTL_MEM_EVENT_OP_PAGING_ENABLE:
{
- struct domain *dom_mem_event = current->domain;
- struct vcpu *v = current;
- struct mem_event_domain *med = &d->mem_event;
- unsigned long ring_addr = mec->ring_addr;
- unsigned long shared_addr = mec->shared_addr;
- l1_pgentry_t l1e;
- unsigned long gfn;
- p2m_type_t p2mt;
- mfn_t ring_mfn;
- mfn_t shared_mfn;
-
- /* Only one xenpaging at a time. If xenpaging crashed,
- * the cache is in an undefined state and so is the guest
- */
- rc = -EBUSY;
- if ( med->ring_page )
- break;
-
- /* Currently only EPT is supported */
- rc = -ENODEV;
- if ( !(hap_enabled(d) &&
- (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)) )
- break;
-
- /* Get MFN of ring page */
- guest_get_eff_l1e(v, ring_addr, &l1e);
- gfn = l1e_get_pfn(l1e);
- ring_mfn = gfn_to_mfn(dom_mem_event, gfn, &p2mt);
-
- rc = -EINVAL;
- if ( unlikely(!mfn_valid(mfn_x(ring_mfn))) )
- break;
-
- /* Get MFN of shared page */
- guest_get_eff_l1e(v, shared_addr, &l1e);
- gfn = l1e_get_pfn(l1e);
- shared_mfn = gfn_to_mfn(dom_mem_event, gfn, &p2mt);
-
- rc = -EINVAL;
- if ( unlikely(!mfn_valid(mfn_x(shared_mfn))) )
- break;
-
- rc = -EINVAL;
- if ( mem_event_enable(d, med, ring_mfn, shared_mfn) != 0 )
- break;
-
- rc = 0;
+ rc = mem_event_enable(d, mec, med);
}
break;
- case XEN_DOMCTL_MEM_EVENT_OP_DISABLE:
+ case XEN_DOMCTL_MEM_EVENT_OP_PAGING_DISABLE:
{
- rc = mem_event_disable(&d->mem_event);
+ rc = mem_event_disable(med);
}
break;
default:
- rc = -ENOSYS;
- break;
+ {
+ if ( med->ring_page )
+ rc = mem_paging_domctl(d, mec, u_domctl);
}
break;
+ }
}
- case XEN_DOMCTL_MEM_EVENT_OP_PAGING:
- {
- rc = mem_paging_domctl(d, mec, u_domctl);
- break;
- }
+ break;
+
case XEN_DOMCTL_MEM_EVENT_OP_ACCESS:
{
- rc = mem_access_domctl(d, mec, u_domctl);
+ struct mem_event_domain *med = &d->mem_access;
+ rc = -ENODEV;
+ /* Only HAP is supported */
+ if ( !hap_enabled(d) )
+ break;
+
+ /* Currently only EPT is supported */
+ if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
+ break;
+
+ switch( mec->op )
+ {
+ case XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE:
+ {
+ rc = mem_event_enable(d, mec, med);
+ }
break;
+
+ case XEN_DOMCTL_MEM_EVENT_OP_ACCESS_DISABLE:
+ {
+ rc = mem_event_disable(&d->mem_access);
+ }
+ break;
+
+ default:
+ {
+ if ( med->ring_page )
+ rc = mem_access_domctl(d, mec, u_domctl);
+ }
+ break;
+ }
}
+ break;
}
return rc;
diff -r ed7586b1d515 -r 483c5f8319ad xen/arch/x86/mm/mem_paging.c
--- a/xen/arch/x86/mm/mem_paging.c Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/arch/x86/mm/mem_paging.c Fri Sep 16 12:19:26 2011 +0100
@@ -28,10 +28,6 @@
int mem_paging_domctl(struct domain *d, xen_domctl_mem_event_op_t *mec,
XEN_GUEST_HANDLE(void) u_domctl)
{
- /* Only HAP is supported */
- if ( !hap_enabled(d) )
- return -ENODEV;
-
switch( mec->op )
{
case XEN_DOMCTL_MEM_EVENT_OP_PAGING_NOMINATE:
diff -r ed7586b1d515 -r 483c5f8319ad xen/arch/x86/mm/mem_sharing.c
--- a/xen/arch/x86/mm/mem_sharing.c Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/arch/x86/mm/mem_sharing.c Fri Sep 16 12:19:26 2011 +0100
@@ -281,12 +281,12 @@
vcpu_pause_nosync(v);
req.flags |= MEM_EVENT_FLAG_VCPU_PAUSED;
- if(mem_event_check_ring(d, &d->mem_event)) return page;
+ if(mem_event_check_ring(d, &d->mem_share)) return page;
req.gfn = gfn;
req.p2mt = p2m_ram_shared;
req.vcpu_id = v->vcpu_id;
- mem_event_put_request(d, &d->mem_event, &req);
+ mem_event_put_request(d, &d->mem_share, &req);
return page;
}
@@ -301,7 +301,7 @@
mem_event_response_t rsp;
/* Get request off the ring */
- mem_event_get_response(&d->mem_event, &rsp);
+ mem_event_get_response(&d->mem_share, &rsp);
/* Unpause domain/vcpu */
if( rsp.flags & MEM_EVENT_FLAG_VCPU_PAUSED )
@@ -697,14 +697,14 @@
switch(mec->op)
{
- case XEN_DOMCTL_MEM_SHARING_OP_CONTROL:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_CONTROL:
{
d->arch.hvm_domain.mem_sharing_enabled = mec->u.enable;
rc = 0;
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GFN:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GFN:
{
unsigned long gfn = mec->u.nominate.u.gfn;
shr_handle_t handle;
@@ -715,7 +715,7 @@
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GREF:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GREF:
{
grant_ref_t gref = mec->u.nominate.u.grant_ref;
unsigned long gfn;
@@ -730,7 +730,7 @@
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_SHARE:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_SHARE:
{
shr_handle_t sh = mec->u.share.source_handle;
shr_handle_t ch = mec->u.share.client_handle;
@@ -738,7 +738,7 @@
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_RESUME:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_RESUME:
{
if(!mem_sharing_enabled(d))
return -EINVAL;
@@ -746,21 +746,21 @@
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GFN:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GFN:
{
unsigned long gfn = mec->u.debug.u.gfn;
rc = mem_sharing_debug_gfn(d, gfn);
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_DEBUG_MFN:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_MFN:
{
unsigned long mfn = mec->u.debug.u.mfn;
rc = mem_sharing_debug_mfn(mfn);
}
break;
- case XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GREF:
+ case XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GREF:
{
grant_ref_t gref = mec->u.debug.u.gref;
rc = mem_sharing_debug_gref(d, gref);
diff -r ed7586b1d515 -r 483c5f8319ad xen/arch/x86/mm/p2m.c
--- a/xen/arch/x86/mm/p2m.c Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/arch/x86/mm/p2m.c Fri Sep 16 12:19:26 2011 +0100
@@ -755,7 +755,7 @@
mem_event_request_t req;
/* Check that there's space on the ring for this request */
- if ( mem_event_check_ring(d, &d->mem_event) == 0)
+ if ( mem_event_check_ring(d, &d->mem_paging) == 0)
{
/* Send release notification to pager */
memset(&req, 0, sizeof(req));
@@ -763,7 +763,7 @@
req.gfn = gfn;
req.vcpu_id = v->vcpu_id;
- mem_event_put_request(d, &d->mem_event, &req);
+ mem_event_put_request(d, &d->mem_paging, &req);
}
}
@@ -775,7 +775,7 @@
struct p2m_domain *p2m = p2m_get_hostp2m(d);
/* Check that there's space on the ring for this request */
- if ( mem_event_check_ring(d, &d->mem_event) )
+ if ( mem_event_check_ring(d, &d->mem_paging) )
return;
memset(&req, 0, sizeof(req));
@@ -803,7 +803,7 @@
else if ( p2mt != p2m_ram_paging_out && p2mt != p2m_ram_paged )
{
/* gfn is already on its way back and vcpu is not paused */
- mem_event_put_req_producers(&d->mem_event);
+ mem_event_put_req_producers(&d->mem_paging);
return;
}
@@ -812,7 +812,7 @@
req.p2mt = p2mt;
req.vcpu_id = v->vcpu_id;
- mem_event_put_request(d, &d->mem_event, &req);
+ mem_event_put_request(d, &d->mem_paging, &req);
}
int p2m_mem_paging_prep(struct domain *d, unsigned long gfn)
@@ -842,7 +842,7 @@
mfn_t mfn;
/* Pull the response off the ring */
- mem_event_get_response(&d->mem_event, &rsp);
+ mem_event_get_response(&d->mem_paging, &rsp);
/* Fix p2m entry if the page was not dropped */
if ( !(rsp.flags & MEM_EVENT_FLAG_DROP_PAGE) )
@@ -889,7 +889,7 @@
p2m_unlock(p2m);
/* Otherwise, check if there is a memory event listener, and send the
message along */
- res = mem_event_check_ring(d, &d->mem_event);
+ res = mem_event_check_ring(d, &d->mem_access);
if ( res < 0 )
{
/* No listener */
@@ -933,7 +933,7 @@
req.vcpu_id = v->vcpu_id;
- mem_event_put_request(d, &d->mem_event, &req);
+ mem_event_put_request(d, &d->mem_access, &req);
/* VCPU paused, mem event request sent */
}
@@ -943,7 +943,7 @@
struct domain *d = p2m->domain;
mem_event_response_t rsp;
- mem_event_get_response(&d->mem_event, &rsp);
+ mem_event_get_response(&d->mem_access, &rsp);
/* Unpause domain */
if ( rsp.flags & MEM_EVENT_FLAG_VCPU_PAUSED )
diff -r ed7586b1d515 -r 483c5f8319ad xen/include/public/domctl.h
--- a/xen/include/public/domctl.h Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/include/public/domctl.h Fri Sep 16 12:19:26 2011 +0100
@@ -708,20 +708,18 @@
/* XEN_DOMCTL_mem_event_op */
-/* Add and remove memory handlers */
-#define XEN_DOMCTL_MEM_EVENT_OP_ENABLE 0
-#define XEN_DOMCTL_MEM_EVENT_OP_DISABLE 1
-
/*
+* Domain memory paging
* Page memory in and out.
*/
#define XEN_DOMCTL_MEM_EVENT_OP_PAGING 1
-/* Domain memory paging */
-#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_NOMINATE 0
-#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_EVICT 1
-#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_PREP 2
-#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_RESUME 3
+#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_ENABLE 0
+#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_DISABLE 1
+#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_NOMINATE 2
+#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_EVICT 3
+#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_PREP 4
+#define XEN_DOMCTL_MEM_EVENT_OP_PAGING_RESUME 5
/*
* Access permissions.
@@ -734,11 +732,14 @@
* ACCESS_RESUME mode for the following domctl.
*/
#define XEN_DOMCTL_MEM_EVENT_OP_ACCESS 2
-#define XEN_DOMCTL_MEM_EVENT_OP_ACCESS_RESUME 0
+
+#define XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE 0
+#define XEN_DOMCTL_MEM_EVENT_OP_ACCESS_DISABLE 1
+#define XEN_DOMCTL_MEM_EVENT_OP_ACCESS_RESUME 2
struct xen_domctl_mem_event_op {
- uint32_t op; /* XEN_DOMCTL_MEM_EVENT_OP_* */
- uint32_t mode; /* XEN_DOMCTL_MEM_EVENT_ENABLE_* */
+ uint32_t op; /* XEN_DOMCTL_MEM_EVENT_OP_*_* */
+ uint32_t mode; /* XEN_DOMCTL_MEM_EVENT_OP_* */
/* OP_ENABLE */
uint64_aligned_t shared_addr; /* IN: Virtual address of shared page */
@@ -755,14 +756,16 @@
*/
/* XEN_DOMCTL_mem_sharing_op */
-#define XEN_DOMCTL_MEM_SHARING_OP_CONTROL 0
-#define XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GFN 1
-#define XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GREF 2
-#define XEN_DOMCTL_MEM_SHARING_OP_SHARE 3
-#define XEN_DOMCTL_MEM_SHARING_OP_RESUME 4
-#define XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GFN 5
-#define XEN_DOMCTL_MEM_SHARING_OP_DEBUG_MFN 6
-#define XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GREF 7
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING 3
+
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_CONTROL 0
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GFN 1
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GREF 2
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_SHARE 3
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_RESUME 4
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GFN 5
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_MFN 6
+#define XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GREF 7
#define XEN_DOMCTL_MEM_SHARING_S_HANDLE_INVALID (-10)
#define XEN_DOMCTL_MEM_SHARING_C_HANDLE_INVALID (-9)
diff -r ed7586b1d515 -r 483c5f8319ad xen/include/xen/sched.h
--- a/xen/include/xen/sched.h Fri Sep 16 12:13:31 2011 +0100
+++ b/xen/include/xen/sched.h Fri Sep 16 12:19:26 2011 +0100
@@ -317,8 +317,12 @@
/* Non-migratable and non-restoreable? */
bool_t disable_migrate;
+ /* Memory sharing support */
+ struct mem_event_domain mem_share;
/* Memory paging support */
- struct mem_event_domain mem_event;
+ struct mem_event_domain mem_paging;
+ /* Memory access support */
+ struct mem_event_domain mem_access;
/* Currently computed from union of all vcpu cpu-affinity masks. */
nodemask_t node_affinity;
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