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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 3 of 6] REDO: mem_access & mem_access 2: access listener can be required
* Adds the ability to create a domain that requires an access listener;
that is, it pauses the VCPU if there is no memory event listener.
Signed-off-by: Joe Epstein <jepstein98@xxxxxxxxx>
diff -r 06b0916eb91d -r 85a7611248b8 xen/include/public/domctl.h
--- a/xen/include/public/domctl.h Tue Jan 04 11:59:48 2011 -0800
+++ b/xen/include/public/domctl.h Tue Jan 04 12:16:42 2011 -0800
@@ -47,17 +47,20 @@
uint32_t ssidref;
xen_domain_handle_t handle;
/* Is this an HVM guest (as opposed to a PV guest)? */
-#define _XEN_DOMCTL_CDF_hvm_guest 0
-#define XEN_DOMCTL_CDF_hvm_guest (1U<<_XEN_DOMCTL_CDF_hvm_guest)
+#define _XEN_DOMCTL_CDF_hvm_guest 0
+#define XEN_DOMCTL_CDF_hvm_guest (1U<<_XEN_DOMCTL_CDF_hvm_guest)
/* Use hardware-assisted paging if available? */
-#define _XEN_DOMCTL_CDF_hap 1
-#define XEN_DOMCTL_CDF_hap (1U<<_XEN_DOMCTL_CDF_hap)
+#define _XEN_DOMCTL_CDF_hap 1
+#define XEN_DOMCTL_CDF_hap (1U<<_XEN_DOMCTL_CDF_hap)
/* Should domain memory integrity be verifed by tboot during Sx? */
-#define _XEN_DOMCTL_CDF_s3_integrity 2
-#define XEN_DOMCTL_CDF_s3_integrity (1U<<_XEN_DOMCTL_CDF_s3_integrity)
+#define _XEN_DOMCTL_CDF_s3_integrity 2
+#define XEN_DOMCTL_CDF_s3_integrity (1U<<_XEN_DOMCTL_CDF_s3_integrity)
/* Disable out-of-sync shadow page tables? */
-#define _XEN_DOMCTL_CDF_oos_off 3
-#define XEN_DOMCTL_CDF_oos_off (1U<<_XEN_DOMCTL_CDF_oos_off)
+#define _XEN_DOMCTL_CDF_oos_off 3
+#define XEN_DOMCTL_CDF_oos_off (1U<<_XEN_DOMCTL_CDF_oos_off)
+ /* Require mem_event listener for access; else pause */
+#define _XEN_DOMCTL_CDF_access_required 4
+#define XEN_DOMCTL_CDF_access_required (1U<<_XEN_DOMCTL_CDF_access_required)
uint32_t flags;
};
typedef struct xen_domctl_createdomain xen_domctl_createdomain_t;
diff -r 06b0916eb91d -r 85a7611248b8 xen/include/xen/sched.h
--- a/xen/include/xen/sched.h Tue Jan 04 11:59:48 2011 -0800
+++ b/xen/include/xen/sched.h Tue Jan 04 12:16:42 2011 -0800
@@ -403,22 +403,24 @@
struct domain *domain_create(
domid_t domid, unsigned int domcr_flags, ssidref_t ssidref);
/* DOMCRF_hvm: Create an HVM domain, as opposed to a PV domain. */
-#define _DOMCRF_hvm 0
-#define DOMCRF_hvm (1U<<_DOMCRF_hvm)
+#define _DOMCRF_hvm 0
+#define DOMCRF_hvm (1U<<_DOMCRF_hvm)
/* DOMCRF_hap: Create a domain with hardware-assisted paging. */
-#define _DOMCRF_hap 1
-#define DOMCRF_hap (1U<<_DOMCRF_hap)
+#define _DOMCRF_hap 1
+#define DOMCRF_hap (1U<<_DOMCRF_hap)
/* DOMCRF_s3_integrity: Create a domain with tboot memory integrity protection
by tboot */
-#define _DOMCRF_s3_integrity 2
-#define DOMCRF_s3_integrity (1U<<_DOMCRF_s3_integrity)
+#define _DOMCRF_s3_integrity 2
+#define DOMCRF_s3_integrity (1U<<_DOMCRF_s3_integrity)
/* DOMCRF_dummy: Create a dummy domain (not scheduled; not on domain list) */
-#define _DOMCRF_dummy 3
-#define DOMCRF_dummy (1U<<_DOMCRF_dummy)
+#define _DOMCRF_dummy 3
+#define DOMCRF_dummy (1U<<_DOMCRF_dummy)
/* DOMCRF_oos_off: dont use out-of-sync optimization for shadow page tables */
-#define _DOMCRF_oos_off 4
-#define DOMCRF_oos_off (1U<<_DOMCRF_oos_off)
-
+#define _DOMCRF_oos_off 4
+#define DOMCRF_oos_off (1U<<_DOMCRF_oos_off)
+/* DOMCRF_access_required: mem_event listener required for access;
else pause */
+#define _DOMCRF_access_required 5
+#define DOMCRF_access_required (1U<<_DOMCRF_access_required)
/*
* rcu_lock_domain_by_id() is more efficient than get_domain_by_id().
* This is the preferred function if the returned domain reference
diff -r 06b0916eb91d -r 85a7611248b8 xen/include/asm-x86/p2m.h
--- a/xen/include/asm-x86/p2m.h Tue Jan 04 11:59:48 2011 -0800
+++ b/xen/include/asm-x86/p2m.h Tue Jan 04 12:16:42 2011 -0800
@@ -422,7 +422,7 @@
}
/* Init the datastructures for later use by the p2m code */
-int p2m_init(struct domain *d);
+int p2m_init(struct domain *d, unsigned int domcr_flags);
/* Allocate a new p2m table for a domain.
*
diff -r 06b0916eb91d -r 85a7611248b8 xen/arch/x86/mm/p2m.c
--- a/xen/arch/x86/mm/p2m.c Tue Jan 04 11:59:48 2011 -0800
+++ b/xen/arch/x86/mm/p2m.c Tue Jan 04 12:16:42 2011 -0800
@@ -1744,7 +1744,7 @@
return;
}
-int p2m_init(struct domain *d)
+int p2m_init(struct domain *d, unsigned int domcr_flags)
{
struct p2m_domain *p2m;
@@ -1752,7 +1752,10 @@
if ( p2m == NULL )
return -ENOMEM;
p2m_initialise(d, p2m);
-
+
+ if ( domcr_flags & DOMCRF_access_required )
+ p2m->access_required = 1;
+
return 0;
}
diff -r 06b0916eb91d -r 85a7611248b8 xen/arch/x86/mm/paging.c
--- a/xen/arch/x86/mm/paging.c Tue Jan 04 11:59:48 2011 -0800
+++ b/xen/arch/x86/mm/paging.c Tue Jan 04 12:16:42 2011 -0800
@@ -647,7 +647,7 @@
{
int rc;
- if ( (rc = p2m_init(d)) != 0 )
+ if ( (rc = p2m_init(d, domcr_flags)) != 0 )
return rc;
/* The order of the *_init calls below is important, as the later
diff -r 06b0916eb91d -r 85a7611248b8 xen/common/domctl.c
--- a/xen/common/domctl.c Tue Jan 04 11:59:48 2011 -0800
+++ b/xen/common/domctl.c Tue Jan 04 12:16:42 2011 -0800
@@ -398,7 +398,7 @@
if ( supervisor_mode_kernel ||
(op->u.createdomain.flags &
~(XEN_DOMCTL_CDF_hvm_guest | XEN_DOMCTL_CDF_hap |
- XEN_DOMCTL_CDF_s3_integrity | XEN_DOMCTL_CDF_oos_off)) )
+ XEN_DOMCTL_CDF_s3_integrity | XEN_DOMCTL_CDF_oos_off |
XEN_DOMCTL_CDF_access_required)) )
break;
dom = op->domain;
@@ -434,6 +434,8 @@
domcr_flags |= DOMCRF_s3_integrity;
if ( op->u.createdomain.flags & XEN_DOMCTL_CDF_oos_off )
domcr_flags |= DOMCRF_oos_off;
+ if ( op->u.createdomain.flags & XEN_DOMCTL_CDF_access_required )
+ domcr_flags |= DOMCRF_access_required;
ret = -ENOMEM;
d = domain_create(dom, domcr_flags, op->u.createdomain.ssidref);
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