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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [SHADOW] Clean up the DOM0_SHADOW_OP interface.
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID 0ea9a824c16c2a99fd803bcdc28f165c9de4b072
# Parent 92066b3fcd86457df3920d021f8b7f07322a46e3
[SHADOW] Clean up the DOM0_SHADOW_OP interface.
Also bump the dom0 interface version for tools (but
not for dom0 kernel!).
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
tools/libxc/xc_hvm_build.c | 11 ++--
tools/libxc/xc_linux_save.c | 6 --
tools/python/xen/lowlevel/xc/xc.c | 4 -
xen/arch/ia64/xen/domain.c | 5 --
xen/arch/x86/shadow2-common.c | 42 ++++++++---------
xen/common/dom0_ops.c | 3 -
xen/include/asm-x86/shadow2.h | 10 ++--
xen/include/public/dom0_ops.h | 89 ++++++++++++++++++++++++++------------
8 files changed, 99 insertions(+), 71 deletions(-)
diff -r 92066b3fcd86 -r 0ea9a824c16c tools/libxc/xc_hvm_build.c
--- a/tools/libxc/xc_hvm_build.c Tue Aug 22 18:48:00 2006 +0100
+++ b/tools/libxc/xc_hvm_build.c Tue Aug 22 18:50:01 2006 +0100
@@ -442,13 +442,12 @@ static int xc_hvm_build_internal(int xc_
}
/* HVM domains must be put into shadow2 mode at the start of day */
- if ( xc_shadow_control(xc_handle, domid, DOM0_SHADOW2_CONTROL_OP_ENABLE,
+ if ( xc_shadow_control(xc_handle, domid, DOM0_SHADOW_CONTROL_OP_ENABLE,
NULL, 0, NULL,
- DOM0_SHADOW2_CONTROL_FLAG_ENABLE
- | DOM0_SHADOW2_CONTROL_FLAG_REFCOUNT
- | DOM0_SHADOW2_CONTROL_FLAG_TRANSLATE
- | DOM0_SHADOW2_CONTROL_FLAG_EXTERNAL,
- NULL) )
+ DOM0_SHADOW_ENABLE_REFCOUNT |
+ DOM0_SHADOW_ENABLE_TRANSLATE |
+ DOM0_SHADOW_ENABLE_EXTERNAL,
+ NULL) )
{
PERROR("Could not enable shadow paging for domain.\n");
goto error_out;
diff -r 92066b3fcd86 -r 0ea9a824c16c tools/libxc/xc_linux_save.c
--- a/tools/libxc/xc_linux_save.c Tue Aug 22 18:48:00 2006 +0100
+++ b/tools/libxc/xc_linux_save.c Tue Aug 22 18:50:01 2006 +0100
@@ -346,11 +346,9 @@ static int analysis_phase(int xc_handle,
xc_shadow_control(xc_handle, domid, DOM0_SHADOW_CONTROL_OP_PEEK,
NULL, 0, NULL, 0, &stats);
- DPRINTF("now= %lld faults= %" PRId32 " dirty= %" PRId32
- " dirty_net= %" PRId32 " dirty_block= %" PRId32"\n",
+ DPRINTF("now= %lld faults= %"PRId32" dirty= %"PRId32"\n",
((now-start)+500)/1000,
- stats.fault_count, stats.dirty_count,
- stats.dirty_net_count, stats.dirty_block_count);
+ stats.fault_count, stats.dirty_count);
}
}
diff -r 92066b3fcd86 -r 0ea9a824c16c tools/python/xen/lowlevel/xc/xc.c
--- a/tools/python/xen/lowlevel/xc/xc.c Tue Aug 22 18:48:00 2006 +0100
+++ b/tools/python/xen/lowlevel/xc/xc.c Tue Aug 22 18:50:01 2006 +0100
@@ -709,11 +709,11 @@ static PyObject *pyxc_shadow_mem_control
return NULL;
if ( mbarg < 0 )
- op = DOM0_SHADOW2_CONTROL_OP_GET_ALLOCATION;
+ op = DOM0_SHADOW_CONTROL_OP_GET_ALLOCATION;
else
{
mb = mbarg;
- op = DOM0_SHADOW2_CONTROL_OP_SET_ALLOCATION;
+ op = DOM0_SHADOW_CONTROL_OP_SET_ALLOCATION;
}
if ( xc_shadow_control(xc->xc_handle, dom, op, NULL, 0, &mb, 0, NULL) < 0 )
return PyErr_SetFromErrno(xc_error);
diff -r 92066b3fcd86 -r 0ea9a824c16c xen/arch/ia64/xen/domain.c
--- a/xen/arch/ia64/xen/domain.c Tue Aug 22 18:48:00 2006 +0100
+++ b/xen/arch/ia64/xen/domain.c Tue Aug 22 18:50:01 2006 +0100
@@ -653,11 +653,6 @@ int shadow_mode_control(struct domain *d
}
break;
- case DOM0_SHADOW_CONTROL_OP_FLUSH:
- atomic64_set(&d->arch.shadow_fault_count, 0);
- atomic64_set(&d->arch.shadow_dirty_count, 0);
- break;
-
case DOM0_SHADOW_CONTROL_OP_CLEAN:
{
int nbr_longs;
diff -r 92066b3fcd86 -r 0ea9a824c16c xen/arch/x86/shadow2-common.c
--- a/xen/arch/x86/shadow2-common.c Tue Aug 22 18:48:00 2006 +0100
+++ b/xen/arch/x86/shadow2-common.c Tue Aug 22 18:50:01 2006 +0100
@@ -2481,14 +2481,15 @@ static int shadow2_enable(struct domain
unsigned int old_pages;
int rv = 0;
+ mode |= SHM2_enable;
+
domain_pause(d);
shadow2_lock(d);
/* Sanity check the arguments */
- if ( d == current->domain
- || shadow2_mode_enabled(d)
- || !(mode & SHM2_enable)
- || ((mode & SHM2_external) && !(mode & SHM2_translate)) )
+ if ( (d == current->domain) ||
+ shadow2_mode_enabled(d) ||
+ ((mode & SHM2_external) && !(mode & SHM2_translate)) )
{
rv = -EINVAL;
goto out;
@@ -2957,11 +2958,7 @@ static int shadow2_log_dirty_op(struct d
domain_pause(d);
shadow2_lock(d);
- if ( sc->op == DOM0_SHADOW_CONTROL_OP_CLEAN
- || sc->op == DOM0_SHADOW_CONTROL_OP_FLUSH )
- clean = 1;
- else
- ASSERT(sc->op == DOM0_SHADOW_CONTROL_OP_PEEK);
+ clean = (sc->op == DOM0_SHADOW_CONTROL_OP_CLEAN);
SHADOW2_DEBUG(LOGDIRTY, "log-dirty %s: dom %u faults=%u dirty=%u\n",
(clean) ? "clean" : "peek",
@@ -3111,25 +3108,27 @@ int shadow2_control_op(struct domain *d,
case DOM0_SHADOW_CONTROL_OP_ENABLE_TEST:
return shadow2_test_enable(d);
-
+
case DOM0_SHADOW_CONTROL_OP_ENABLE_LOGDIRTY:
return shadow2_log_dirty_enable(d);
-
- case DOM0_SHADOW_CONTROL_OP_FLUSH:
+
+ case DOM0_SHADOW_CONTROL_OP_ENABLE_TRANSLATE:
+ return shadow2_enable(d, SHM2_refcounts|SHM2_translate);
+
case DOM0_SHADOW_CONTROL_OP_CLEAN:
case DOM0_SHADOW_CONTROL_OP_PEEK:
return shadow2_log_dirty_op(d, sc);
-
-
- case DOM0_SHADOW2_CONTROL_OP_ENABLE:
- return shadow2_enable(d, sc->mode << SHM2_shift);
-
- case DOM0_SHADOW2_CONTROL_OP_GET_ALLOCATION:
+ case DOM0_SHADOW_CONTROL_OP_ENABLE:
+ if ( sc->mode & DOM0_SHADOW_ENABLE_LOG_DIRTY )
+ return shadow2_log_dirty_enable(d);
+ return shadow2_enable(d, sc->mode << SHM2_shift);
+
+ case DOM0_SHADOW_CONTROL_OP_GET_ALLOCATION:
sc->mb = shadow2_get_allocation(d);
return 0;
-
- case DOM0_SHADOW2_CONTROL_OP_SET_ALLOCATION:
+
+ case DOM0_SHADOW_CONTROL_OP_SET_ALLOCATION:
rc = shadow2_set_allocation(d, sc->mb, &preempted);
if ( preempted )
/* Not finished. Set up to re-run the call. */
@@ -3139,8 +3138,7 @@ int shadow2_control_op(struct domain *d,
/* Finished. Return the new allocation */
sc->mb = shadow2_get_allocation(d);
return rc;
-
-
+
default:
SHADOW2_ERROR("Bad shadow op %u\n", sc->op);
return -EINVAL;
diff -r 92066b3fcd86 -r 0ea9a824c16c xen/common/dom0_ops.c
--- a/xen/common/dom0_ops.c Tue Aug 22 18:48:00 2006 +0100
+++ b/xen/common/dom0_ops.c Tue Aug 22 18:50:01 2006 +0100
@@ -141,7 +141,8 @@ long do_dom0_op(XEN_GUEST_HANDLE(dom0_op
if ( copy_from_guest(op, u_dom0_op, 1) )
return -EFAULT;
- if ( op->interface_version != DOM0_INTERFACE_VERSION )
+ if ( (op->interface_version != DOM0_TOOLS_INTERFACE_VERSION) &&
+ (op->interface_version != DOM0_KERNEL_INTERFACE_VERSION) )
return -EACCES;
if ( acm_pre_dom0_op(op, &ssid) )
diff -r 92066b3fcd86 -r 0ea9a824c16c xen/include/asm-x86/shadow2.h
--- a/xen/include/asm-x86/shadow2.h Tue Aug 22 18:48:00 2006 +0100
+++ b/xen/include/asm-x86/shadow2.h Tue Aug 22 18:50:01 2006 +0100
@@ -32,16 +32,16 @@
#define SHM2_shift 10
/* We're in one of the shadow modes */
-#define SHM2_enable (DOM0_SHADOW2_CONTROL_FLAG_ENABLE << SHM2_shift)
+#define SHM2_enable (1U << SHM2_shift)
/* Refcounts based on shadow tables instead of guest tables */
-#define SHM2_refcounts (DOM0_SHADOW2_CONTROL_FLAG_REFCOUNT << SHM2_shift)
+#define SHM2_refcounts (DOM0_SHADOW_ENABLE_REFCOUNT << SHM2_shift)
/* Enable log dirty mode */
-#define SHM2_log_dirty (DOM0_SHADOW2_CONTROL_FLAG_LOG_DIRTY << SHM2_shift)
+#define SHM2_log_dirty (DOM0_SHADOW_ENABLE_LOG_DIRTY << SHM2_shift)
/* Xen does p2m translation, not guest */
-#define SHM2_translate (DOM0_SHADOW2_CONTROL_FLAG_TRANSLATE << SHM2_shift)
+#define SHM2_translate (DOM0_SHADOW_ENABLE_TRANSLATE << SHM2_shift)
/* Xen does not steal address space from the domain for its own booking;
* requires VT or similar mechanisms */
-#define SHM2_external (DOM0_SHADOW2_CONTROL_FLAG_EXTERNAL << SHM2_shift)
+#define SHM2_external (DOM0_SHADOW_ENABLE_EXTERNAL << SHM2_shift)
#define shadow2_mode_enabled(_d) ((_d)->arch.shadow2.mode)
#define shadow2_mode_refcounts(_d) ((_d)->arch.shadow2.mode & SHM2_refcounts)
diff -r 92066b3fcd86 -r 0ea9a824c16c xen/include/public/dom0_ops.h
--- a/xen/include/public/dom0_ops.h Tue Aug 22 18:48:00 2006 +0100
+++ b/xen/include/public/dom0_ops.h Tue Aug 22 18:50:01 2006 +0100
@@ -18,8 +18,19 @@
* Make sure you increment the interface version whenever you modify this file!
* This makes sure that old versions of dom0 tools will stop working in a
* well-defined way (rather than crashing the machine, for instance).
- */
-#define DOM0_INTERFACE_VERSION 0x03000001
+ *
+ * Separate kernel from tools as the kernel uses a small subset of the dom0
+ * operations and so it is unnecessary to break backward compatibility so
+ * often.
+ */
+#define DOM0_TOOLS_INTERFACE_VERSION 0x13000001
+#define DOM0_KERNEL_INTERFACE_VERSION 0x03000001
+
+#ifdef __XEN_TOOLS__
+#define DOM0_INTERFACE_VERSION DOM0_TOOLS_INTERFACE_VERSION
+#else
+#define DOM0_INTERFACE_VERSION DOM0_KERNEL_INTERFACE_VERSION
+#endif
/************************************************************************/
@@ -253,32 +264,54 @@ DEFINE_XEN_GUEST_HANDLE(dom0_sched_id_t)
*/
#define DOM0_SHADOW_CONTROL 25
+/* Disable shadow mode. */
#define DOM0_SHADOW_CONTROL_OP_OFF 0
-#define DOM0_SHADOW_CONTROL_OP_ENABLE_TEST 1
-#define DOM0_SHADOW_CONTROL_OP_ENABLE_LOGDIRTY 2
-#define DOM0_SHADOW_CONTROL_OP_ENABLE_TRANSLATE 3
-
-#define DOM0_SHADOW_CONTROL_OP_FLUSH 10 /* table ops */
+
+/* Enable shadow mode (mode contains ORed DOM0_SHADOW_ENABLE_* flags). */
+#define DOM0_SHADOW_CONTROL_OP_ENABLE 32
+
+/* Log-dirty bitmap operations. */
+ /* Return the bitmap and clean internal copy for next round. */
#define DOM0_SHADOW_CONTROL_OP_CLEAN 11
+ /* Return the bitmap but do not modify internal copy. */
#define DOM0_SHADOW_CONTROL_OP_PEEK 12
-/* Shadow2 operations */
-#define DOM0_SHADOW2_CONTROL_OP_GET_ALLOCATION 30
-#define DOM0_SHADOW2_CONTROL_OP_SET_ALLOCATION 31
-#define DOM0_SHADOW2_CONTROL_OP_ENABLE 32
-
-/* Mode flags for Shadow2 enable op */
-#define DOM0_SHADOW2_CONTROL_FLAG_ENABLE (1 << 0)
-#define DOM0_SHADOW2_CONTROL_FLAG_REFCOUNT (1 << 1)
-#define DOM0_SHADOW2_CONTROL_FLAG_LOG_DIRTY (1 << 2)
-#define DOM0_SHADOW2_CONTROL_FLAG_TRANSLATE (1 << 3)
-#define DOM0_SHADOW2_CONTROL_FLAG_EXTERNAL (1 << 4)
+/* Memory allocation accessors. */
+#define DOM0_SHADOW_CONTROL_OP_GET_ALLOCATION 30
+#define DOM0_SHADOW_CONTROL_OP_SET_ALLOCATION 31
+
+/* Legacy enable operations. */
+ /* Equiv. to ENABLE with no mode flags. */
+#define DOM0_SHADOW_CONTROL_OP_ENABLE_TEST 1
+ /* Equiv. to ENABLE with mode flag ENABLE_LOG_DIRTY. */
+#define DOM0_SHADOW_CONTROL_OP_ENABLE_LOGDIRTY 2
+ /* Equiv. to ENABLE with mode flags ENABLE_REFCOUNT and ENABLE_TRANSLATE. */
+#define DOM0_SHADOW_CONTROL_OP_ENABLE_TRANSLATE 3
+
+/* Mode flags for DOM0_SHADOW_CONTROL_OP_ENABLE. */
+ /*
+ * Shadow pagetables are refcounted: guest does not use explicit mmu
+ * operations nor write-protect its pagetables.
+ */
+#define DOM0_SHADOW_ENABLE_REFCOUNT (1 << 1)
+ /*
+ * Log pages in a bitmap as they are dirtied.
+ * Used for live relocation to determine which pages must be re-sent.
+ */
+#define DOM0_SHADOW_ENABLE_LOG_DIRTY (1 << 2)
+ /*
+ * Automatically translate GPFNs into MFNs.
+ */
+#define DOM0_SHADOW_ENABLE_TRANSLATE (1 << 3)
+ /*
+ * Xen does not steal virtual address space from the guest.
+ * Requires HVM support.
+ */
+#define DOM0_SHADOW_ENABLE_EXTERNAL (1 << 4)
struct dom0_shadow_control_stats {
uint32_t fault_count;
uint32_t dirty_count;
- uint32_t dirty_net_count;
- uint32_t dirty_block_count;
};
typedef struct dom0_shadow_control_stats dom0_shadow_control_stats_t;
DEFINE_XEN_GUEST_HANDLE(dom0_shadow_control_stats_t);
@@ -286,13 +319,17 @@ struct dom0_shadow_control {
struct dom0_shadow_control {
/* IN variables. */
domid_t domain;
- uint32_t op;
+ uint32_t op; /* DOM0_SHADOW_CONTROL_OP_* */
+
+ /* OP_ENABLE */
+ uint32_t mode; /* DOM0_SHADOW_ENABLE_* */
+
+ /* OP_GET_ALLOCATION / OP_SET_ALLOCATION */
+ uint32_t mb; /* Shadow memory allocation in MB */
+
+ /* OP_PEEK / OP_CLEAN */
XEN_GUEST_HANDLE(ulong) dirty_bitmap;
- /* IN/OUT variables. */
- uint64_t pages; /* size of buffer, updated with actual size */
- uint32_t mb; /* Shadow2 memory allocation in MB */
- uint32_t mode; /* Shadow2 mode to enable */
- /* OUT variables. */
+ uint64_t pages; /* Size of buffer. Updated with actual size. */
struct dom0_shadow_control_stats stats;
};
typedef struct dom0_shadow_control dom0_shadow_control_t;
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