[HVM] Add support for hardware-assisted paging

as the second implementation of the generic paging-assistance interface.

Signed-off-by: Wei Huang <wei.huang2@amd.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/xen/include/asm-x86/hap.h b/xen/include/asm-x86/hap.h
new file mode 100644
index 0000000000..9c070f6fa8
--- /dev/null
+++ b/xen/include/asm-x86/hap.h
@@ -0,0 +1,122 @@
+/******************************************************************************
+ * include/asm-x86/hap.h
+ *
+ * hardware-assisted paging
+ * Copyright (c) 2007 Advanced Micro Devices (Wei Huang)
+ * 
+ * Parts of this code are Copyright (c) 2006 by XenSource Inc.
+ * Parts of this code are Copyright (c) 2006 by Michael A Fetterman
+ * Parts based on earlier work by Michael A Fetterman, Ian Pratt et al.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _XEN_HAP_H
+#define _XEN_HAP_H
+
+#define HERE_I_AM                                                     \
+    debugtrace_printk("HERE I AM: %s %s %d\n", __func__, __FILE__, __LINE__)
+#define HAP_PRINTK(_f, _a...)                                         \
+    debugtrace_printk("hap: %s(): " _f, __func__, ##_a)
+#define HAP_ERROR(_f, _a...)                                          \
+    printk("hap error: %s(): " _f, __func__, ##_a)
+
+/************************************************/
+/*          hap domain page mapping             */
+/************************************************/
+static inline void *
+hap_map_domain_page(mfn_t mfn)
+{
+    return map_domain_page(mfn_x(mfn));
+}
+
+static inline void
+hap_unmap_domain_page(void *p)
+{
+    unmap_domain_page(p);
+}
+
+static inline void *
+hap_map_domain_page_global(mfn_t mfn)
+{
+    return map_domain_page_global(mfn_x(mfn));
+}
+
+static inline void 
+hap_unmap_domain_page_global(void *p) 
+{
+    unmap_domain_page_global(p);
+}
+
+/************************************************/
+/*           locking for hap code               */
+/************************************************/
+#define hap_lock_init(_d)                                   \
+    do {                                                    \
+        spin_lock_init(&(_d)->arch.paging.hap.lock);        \
+        (_d)->arch.paging.hap.locker = -1;                  \
+        (_d)->arch.paging.hap.locker_function = "nobody";   \
+    } while (0)
+
+#define hap_locked_by_me(_d)                     \
+    (current->processor == (_d)->arch.paging.hap.locker)
+
+#define hap_lock(_d)                                                       \
+    do {                                                                   \
+        if ( unlikely((_d)->arch.paging.hap.locker == current->processor) )\
+        {                                                                  \
+            printk("Error: hap lock held by %s\n",                         \
+                   (_d)->arch.paging.hap.locker_function);                 \
+            BUG();                                                         \
+        }                                                                  \
+        spin_lock(&(_d)->arch.paging.hap.lock);                            \
+        ASSERT((_d)->arch.paging.hap.locker == -1);                        \
+        (_d)->arch.paging.hap.locker = current->processor;                 \
+        (_d)->arch.paging.hap.locker_function = __func__;                  \
+    } while (0)
+
+#define hap_unlock(_d)                                              \
+    do {                                                            \
+        ASSERT((_d)->arch.paging.hap.locker == current->processor); \
+        (_d)->arch.paging.hap.locker = -1;                          \
+        (_d)->arch.paging.hap.locker_function = "nobody";           \
+        spin_unlock(&(_d)->arch.paging.hap.lock);                   \
+    } while (0)
+
+/************************************************/
+/*        hap domain level functions            */
+/************************************************/
+void  hap_domain_init(struct domain *d);
+int   hap_domctl(struct domain *d, xen_domctl_shadow_op_t *sc,
+                 XEN_GUEST_HANDLE(void) u_domctl);
+int   hap_enable(struct domain *d, u32 mode);
+void  hap_final_teardown(struct domain *d);
+void  hap_teardown(struct domain *d);
+void  hap_vcpu_init(struct vcpu *v);
+
+extern struct paging_mode hap_paging_real_mode;
+extern struct paging_mode hap_paging_protected_mode;
+extern struct paging_mode hap_paging_pae_mode;
+extern struct paging_mode hap_paging_long_mode;
+#endif /* XEN_HAP_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */