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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 09/11] x86/altp2m: define and implement alternate p2m HVMOP types.
Signed-off-by: Ed White <edmund.h.white@xxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 217 ++++++++++++++++++++++++++++++++++++++++
xen/include/public/hvm/hvm_op.h | 68 +++++++++++++
2 files changed, 285 insertions(+)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index e6f64a3..afe16bf 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -6145,6 +6145,223 @@ long do_hvm_op(unsigned long op,
XEN_GUEST_HANDLE_PARAM(void) arg)
break;
}
+ case HVMOP_altp2m_get_domain_state:
+ {
+ struct xen_hvm_altp2m_domain_state a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() )
+ goto param_fail9;
+
+ a.state = altp2mhvm_active(d);
+ rc = copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
+
+ param_fail9:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ case HVMOP_altp2m_set_domain_state:
+ {
+ struct xen_hvm_altp2m_domain_state a;
+ struct domain *d;
+ struct vcpu *v;
+ bool_t ostate;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() ||
+ nestedhvm_enabled(d) )
+ goto param_fail10;
+
+ ostate = d->arch.altp2m_active;
+ d->arch.altp2m_active = !!a.state;
+
+ /* If the alternate p2m state has changed, handle appropriately */
+ if ( d->arch.altp2m_active != ostate )
+ {
+ if ( !ostate && !p2m_init_altp2m_by_id(d, 0) )
+ goto param_fail10;
+
+ for_each_vcpu( d, v )
+ if (!ostate)
+ altp2mhvm_vcpu_initialise(v);
+ else
+ altp2mhvm_vcpu_destroy(v);
+
+ if ( ostate )
+ p2m_flush_altp2m(d);
+ }
+
+ rc = 0;
+
+ param_fail10:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ case HVMOP_altp2m_vcpu_enable_notify:
+ {
+ struct vcpu *curr = current;
+ struct xen_hvm_altp2m_vcpu_enable_notify a;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ if ( !is_hvm_domain(curr_d) || !hvm_altp2m_supported() ||
+ !curr_d->arch.altp2m_active || vcpu_altp2mhvm(curr).veinfo )
+ return -EINVAL;
+
+ vcpu_altp2mhvm(curr).veinfo = a.pfn;
+ ahvm_vcpu_update_vmfunc_ve(curr);
+ rc = 0;
+
+ break;
+ }
+
+ case HVMOP_altp2m_create_p2m:
+ {
+ struct xen_hvm_altp2m_view a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() ||
+ !d->arch.altp2m_active )
+ goto param_fail11;
+
+ if ( !p2m_init_next_altp2m(d, &a.view) )
+ goto param_fail11;
+
+ p2m_set_altp2m_mem_access(d, a.view, ~0ul, a.hvmmem_default_access);
+
+ rc = copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
+
+ param_fail11:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ case HVMOP_altp2m_destroy_p2m:
+ {
+ struct xen_hvm_altp2m_view a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() ||
+ !d->arch.altp2m_active )
+ goto param_fail12;
+
+ if ( p2m_destroy_altp2m_by_id(d, a.view) )
+ rc = 0;
+
+ param_fail12:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ case HVMOP_altp2m_switch_p2m:
+ {
+ struct xen_hvm_altp2m_view a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() ||
+ !d->arch.altp2m_active )
+ goto param_fail13;
+
+ if ( p2m_switch_domain_altp2m_by_id(d, a.view) )
+ rc = 0;
+
+ param_fail13:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ case HVMOP_altp2m_set_mem_access:
+ {
+ struct xen_hvm_altp2m_set_mem_access a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() ||
+ !d->arch.altp2m_active )
+ goto param_fail14;
+
+ if ( p2m_set_altp2m_mem_access(d, a.view, a.pfn, a.hvmmem_access) )
+ rc = 0;
+
+ param_fail14:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ case HVMOP_altp2m_change_pfn:
+ {
+ struct xen_hvm_altp2m_change_pfn a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = -EINVAL;
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() ||
+ !d->arch.altp2m_active )
+ goto param_fail15;
+
+ if ( p2m_change_altp2m_pfn(d, a.view, a.old_pfn, a.new_pfn) )
+ rc = 0;
+
+ param_fail15:
+ rcu_unlock_domain(d);
+ break;
+ }
+
default:
{
gdprintk(XENLOG_DEBUG, "Bad HVM op %ld.\n", op);
diff --git a/xen/include/public/hvm/hvm_op.h b/xen/include/public/hvm/hvm_op.h
index eeb0a60..ea542ec 100644
--- a/xen/include/public/hvm/hvm_op.h
+++ b/xen/include/public/hvm/hvm_op.h
@@ -369,6 +369,74 @@ DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_ioreq_server_state_t);
#endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
+/* Set/get the altp2m state for a domain */
+#define HVMOP_altp2m_set_domain_state 23
+#define HVMOP_altp2m_get_domain_state 24
+struct xen_hvm_altp2m_domain_state {
+ /* Domain to be updated or queried */
+ domid_t domid;
+ /* IN or OUT variable on/off */
+ uint8_t state;
+};
+typedef struct xen_hvm_altp2m_domain_state xen_hvm_altp2m_domain_state_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_domain_state_t);
+
+/* Set the current VCPU to receive altp2m event notifications */
+#define HVMOP_altp2m_vcpu_enable_notify 25
+struct xen_hvm_altp2m_vcpu_enable_notify {
+ /* #VE info area pfn */
+ uint64_t pfn;
+};
+typedef struct xen_hvm_altp2m_vcpu_enable_notify
xen_hvm_altp2m_vcpu_enable_notify_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_vcpu_enable_notify_t);
+
+/* Create a new view */
+#define HVMOP_altp2m_create_p2m 26
+/* Destroy a view */
+#define HVMOP_altp2m_destroy_p2m 27
+/* Switch view for an entire domain */
+#define HVMOP_altp2m_switch_p2m 28
+struct xen_hvm_altp2m_view {
+ /* Domain to be updated */
+ domid_t domid;
+ /* IN/OUT variable */
+ uint16_t view;
+ /* Create view only: default access type */
+ uint16_t hvmmem_default_access; /* xenmem_access_t */
+};
+typedef struct xen_hvm_altp2m_view xen_hvm_altp2m_view_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_view_t);
+
+/* Notify that a page of memory is to have specific access types */
+#define HVMOP_altp2m_set_mem_access 29
+struct xen_hvm_altp2m_set_mem_access {
+ /* Domain to be updated. */
+ domid_t domid;
+ /* view */
+ uint16_t view;
+ /* Memory type */
+ uint16_t hvmmem_access; /* xenmem_access_t */
+ /* pfn */
+ uint64_t pfn;
+};
+typedef struct xen_hvm_altp2m_set_mem_access xen_hvm_altp2m_set_mem_access_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_set_mem_access_t);
+
+/* Change a p2m entry to map a different pfn */
+#define HVMOP_altp2m_change_pfn 30
+struct xen_hvm_altp2m_change_pfn {
+ /* Domain to be updated. */
+ domid_t domid;
+ /* view */
+ uint16_t view;
+ /* old pfn */
+ uint64_t old_pfn;
+ /* new pfn, -1 means revert */
+ uint64_t new_pfn;
+};
+typedef struct xen_hvm_altp2m_change_pfn xen_hvm_altp2m_change_pfn_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_change_pfn_t);
+
#endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */
/*
--
1.9.1
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