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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v5 11/15] x86/altp2m: define and implement alternate p2m HVMOP types.
Signed-off-by: Ed White <edmund.h.white@xxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 142 ++++++++++++++++++++++++++++++++++++++++
xen/include/public/hvm/hvm_op.h | 82 +++++++++++++++++++++++
2 files changed, 224 insertions(+)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index a9f4b1b..df6c6b6 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -6443,6 +6443,148 @@ long do_hvm_op(unsigned long op,
XEN_GUEST_HANDLE_PARAM(void) arg)
break;
}
+ case HVMOP_altp2m:
+ {
+ struct xen_hvm_altp2m_op a;
+ struct domain *d = NULL;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ if ( a.pad[0] || a.pad[1] )
+ return -EINVAL;
+
+ switch ( a.cmd )
+ {
+ case HVMOP_altp2m_get_domain_state:
+ case HVMOP_altp2m_set_domain_state:
+ case HVMOP_altp2m_create_p2m:
+ case HVMOP_altp2m_destroy_p2m:
+ case HVMOP_altp2m_switch_p2m:
+ case HVMOP_altp2m_set_mem_access:
+ case HVMOP_altp2m_change_gfn:
+ d = rcu_lock_domain_by_any_id(a.domain);
+ if ( d == NULL )
+ return -ESRCH;
+
+ if ( !is_hvm_domain(d) || !hvm_altp2m_supported() )
+ rc = -EINVAL;
+ break;
+
+ case HVMOP_altp2m_vcpu_enable_notify:
+ break;
+
+ default:
+ return -ENOSYS;
+ }
+
+ if ( !rc )
+ {
+ switch ( a.cmd )
+ {
+ case HVMOP_altp2m_get_domain_state:
+ a.u.domain_state.state = altp2m_active(d);
+ rc = __copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
+ break;
+
+ case HVMOP_altp2m_set_domain_state:
+ {
+ struct vcpu *v;
+ bool_t ostate;
+
+ if ( nestedhvm_enabled(d) )
+ {
+ rc = -EINVAL;
+ break;
+ }
+
+ ostate = d->arch.altp2m_active;
+ d->arch.altp2m_active = !!a.u.domain_state.state;
+
+ /* If the alternate p2m state has changed, handle
appropriately */
+ if ( d->arch.altp2m_active != ostate &&
+ (ostate || !(rc = p2m_init_altp2m_by_id(d, 0))) )
+ {
+ for_each_vcpu( d, v )
+ {
+ if ( !ostate )
+ altp2m_vcpu_initialise(v);
+ else
+ altp2m_vcpu_destroy(v);
+ }
+
+ if ( ostate )
+ p2m_flush_altp2m(d);
+ }
+ break;
+ }
+ default:
+ if ( !(d ? d : current->domain)->arch.altp2m_active )
+ {
+ rc = -EINVAL;
+ break;
+ }
+
+ switch ( a.cmd )
+ {
+ case HVMOP_altp2m_vcpu_enable_notify:
+ {
+ struct vcpu *curr = current;
+ p2m_type_t p2mt;
+
+ if ( (gfn_x(vcpu_altp2m(curr).veinfo_gfn) != INVALID_GFN)
||
+ (mfn_x(get_gfn_query_unlocked(curr->domain,
+ a.u.enable_notify.gfn, &p2mt)) == INVALID_MFN)
)
+ return -EINVAL;
+
+ vcpu_altp2m(curr).veinfo_gfn = _gfn(a.u.enable_notify.gfn);
+ altp2m_vcpu_update_vmfunc_ve(curr);
+ break;
+ }
+ case HVMOP_altp2m_create_p2m:
+ if ( !(rc = p2m_init_next_altp2m(d, &a.u.view.view)) )
+ rc = __copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
+ break;
+
+ case HVMOP_altp2m_destroy_p2m:
+ rc = p2m_destroy_altp2m_by_id(d, a.u.view.view);
+ break;
+
+ case HVMOP_altp2m_switch_p2m:
+ rc = p2m_switch_domain_altp2m_by_id(d, a.u.view.view);
+ break;
+
+ case HVMOP_altp2m_set_mem_access:
+ if ( a.u.set_mem_access.pad[0] ||
a.u.set_mem_access.pad[1] ||
+ a.u.set_mem_access.pad[2] ||
a.u.set_mem_access.pad[3] )
+ rc = -EINVAL;
+ else
+ rc = p2m_set_altp2m_mem_access(d,
a.u.set_mem_access.view,
+ _gfn(a.u.set_mem_access.gfn),
+ a.u.set_mem_access.hvmmem_access);
+ break;
+
+ case HVMOP_altp2m_change_gfn:
+ if ( a.u.change_gfn.pad[0] || a.u.change_gfn.pad[1] ||
+ a.u.change_gfn.pad[2] || a.u.change_gfn.pad[3] ||
+ a.u.change_gfn.pad[4] || a.u.change_gfn.pad[5] )
+ rc = -EINVAL;
+ else
+ rc = p2m_change_altp2m_gfn(d, a.u.change_gfn.view,
+ _gfn(a.u.change_gfn.old_gfn),
+ _gfn(a.u.change_gfn.new_gfn));
+ break;
+ }
+ break;
+ }
+ }
+
+ if ( d )
+ 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 9b84e84..05d42c4 100644
--- a/xen/include/public/hvm/hvm_op.h
+++ b/xen/include/public/hvm/hvm_op.h
@@ -396,6 +396,88 @@ DEFINE_XEN_GUEST_HANDLE(xen_hvm_evtchn_upcall_vector_t);
#endif /* defined(__i386__) || defined(__x86_64__) */
+/* HVMOP_altp2m: perform altp2m state operations */
+#define HVMOP_altp2m 24
+
+struct xen_hvm_altp2m_domain_state {
+ /* 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);
+
+struct xen_hvm_altp2m_vcpu_enable_notify {
+ /* #VE info area gfn */
+ uint64_t gfn;
+};
+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);
+
+struct xen_hvm_altp2m_view {
+ /* IN/OUT variable */
+ uint16_t view;
+ /* Create view only: default access type
+ * NOTE: currently ignored */
+ 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);
+
+struct xen_hvm_altp2m_set_mem_access {
+ /* view */
+ uint16_t view;
+ /* Memory type */
+ uint16_t hvmmem_access; /* xenmem_access_t */
+ uint8_t pad[4];
+ /* gfn */
+ uint64_t gfn;
+};
+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);
+
+struct xen_hvm_altp2m_change_gfn {
+ /* view */
+ uint16_t view;
+ uint8_t pad[6];
+ /* old gfn */
+ uint64_t old_gfn;
+ /* new gfn, INVALID_GFN (~0UL) means revert */
+ uint64_t new_gfn;
+};
+typedef struct xen_hvm_altp2m_change_gfn xen_hvm_altp2m_change_gfn_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_change_gfn_t);
+
+struct xen_hvm_altp2m_op {
+ uint32_t cmd;
+/* Get/set the altp2m state for a domain */
+#define HVMOP_altp2m_get_domain_state 1
+#define HVMOP_altp2m_set_domain_state 2
+/* Set the current VCPU to receive altp2m event notifications */
+#define HVMOP_altp2m_vcpu_enable_notify 3
+/* Create a new view */
+#define HVMOP_altp2m_create_p2m 4
+/* Destroy a view */
+#define HVMOP_altp2m_destroy_p2m 5
+/* Switch view for an entire domain */
+#define HVMOP_altp2m_switch_p2m 6
+/* Notify that a page of memory is to have specific access types */
+#define HVMOP_altp2m_set_mem_access 7
+/* Change a p2m entry to have a different gfn->mfn mapping */
+#define HVMOP_altp2m_change_gfn 8
+ domid_t domain;
+ uint8_t pad[2];
+ union {
+ struct xen_hvm_altp2m_domain_state domain_state;
+ struct xen_hvm_altp2m_vcpu_enable_notify enable_notify;
+ struct xen_hvm_altp2m_view view;
+ struct xen_hvm_altp2m_set_mem_access set_mem_access;
+ struct xen_hvm_altp2m_change_gfn change_gfn;
+ uint8_t pad[64];
+ } u;
+};
+typedef struct xen_hvm_altp2m_op xen_hvm_altp2m_op_t;
+DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_op_t);
+
#endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */
/*
--
1.9.1
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