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[Xen-devel] [PATCH v3 07/21] x86/mm: move and rename guest_get_eff{, kern}_l1e



Move them to pv/mm.c and rename them to pv_get_guest_eff_{,kern}_l1e.
Export them via pv/mm.h.

They will be used later in emulation handlers.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/mm.c           | 38 +++----------------------
 xen/arch/x86/pv/Makefile    |  1 +
 xen/arch/x86/pv/mm.c        | 67 +++++++++++++++++++++++++++++++++++++++++++++
 xen/include/asm-x86/pv/mm.h | 53 +++++++++++++++++++++++++++++++++++
 4 files changed, 125 insertions(+), 34 deletions(-)
 create mode 100644 xen/arch/x86/pv/mm.c
 create mode 100644 xen/include/asm-x86/pv/mm.h

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 102b607c78..d264f76684 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -125,6 +125,7 @@
 
 #include <asm/hvm/grant_table.h>
 #include <asm/pv/grant_table.h>
+#include <asm/pv/mm.h>
 
 #include "pv/emulate.h"
 
@@ -577,37 +578,6 @@ static inline void guest_unmap_l1e(void *p)
     unmap_domain_page(p);
 }
 
-/* Read a PV guest's l1e that maps this virtual address. */
-static inline void guest_get_eff_l1e(unsigned long addr, l1_pgentry_t *eff_l1e)
-{
-    ASSERT(!paging_mode_translate(current->domain));
-    ASSERT(!paging_mode_external(current->domain));
-
-    if ( unlikely(!__addr_ok(addr)) ||
-         __copy_from_user(eff_l1e,
-                          &__linear_l1_table[l1_linear_offset(addr)],
-                          sizeof(l1_pgentry_t)) )
-        *eff_l1e = l1e_empty();
-}
-
-/*
- * Read the guest's l1e that maps this address, from the kernel-mode
- * page tables.
- */
-static inline void guest_get_eff_kern_l1e(struct vcpu *v, unsigned long addr,
-                                          void *eff_l1e)
-{
-    const bool user_mode = !(v->arch.flags & TF_kernel_mode);
-
-    if ( user_mode )
-        toggle_guest_mode(v);
-
-    guest_get_eff_l1e(addr, eff_l1e);
-
-    if ( user_mode )
-        toggle_guest_mode(v);
-}
-
 static inline void page_set_tlbflush_timestamp(struct page_info *page)
 {
     /*
@@ -692,7 +662,7 @@ int map_ldt_shadow_page(unsigned int off)
 
     if ( is_pv_32bit_domain(d) )
         gva = (u32)gva;
-    guest_get_eff_kern_l1e(v, gva, &l1e);
+    pv_get_guest_eff_kern_l1e(v, gva, &l1e);
     if ( unlikely(!(l1e_get_flags(l1e) & _PAGE_PRESENT)) )
         return 0;
 
@@ -5396,7 +5366,7 @@ int ptwr_do_page_fault(struct vcpu *v, unsigned long addr,
     int rc;
 
     /* Attempt to read the PTE that maps the VA being accessed. */
-    guest_get_eff_l1e(addr, &pte);
+    pv_get_guest_eff_l1e(addr, &pte);
 
     /* We are looking only for read-only mappings of p.t. pages. */
     if ( ((l1e_get_flags(pte) & (_PAGE_PRESENT|_PAGE_RW)) != _PAGE_PRESENT) ||
@@ -5551,7 +5521,7 @@ int mmio_ro_do_page_fault(struct vcpu *v, unsigned long 
addr,
     int rc;
 
     /* Attempt to read the PTE that maps the VA being accessed. */
-    guest_get_eff_l1e(addr, &pte);
+    pv_get_guest_eff_l1e(addr, &pte);
 
     /* We are looking only for read-only mappings of MMIO pages. */
     if ( ((l1e_get_flags(pte) & (_PAGE_PRESENT|_PAGE_RW)) != _PAGE_PRESENT) )
diff --git a/xen/arch/x86/pv/Makefile b/xen/arch/x86/pv/Makefile
index 4e15484471..c83aed493b 100644
--- a/xen/arch/x86/pv/Makefile
+++ b/xen/arch/x86/pv/Makefile
@@ -7,6 +7,7 @@ obj-y += emul-priv-op.o
 obj-y += hypercall.o
 obj-y += iret.o
 obj-y += misc-hypercalls.o
+obj-y += mm.o
 obj-y += traps.o
 
 obj-bin-y += dom0_build.init.o
diff --git a/xen/arch/x86/pv/mm.c b/xen/arch/x86/pv/mm.c
new file mode 100644
index 0000000000..aa2ce34145
--- /dev/null
+++ b/xen/arch/x86/pv/mm.c
@@ -0,0 +1,67 @@
+/******************************************************************************
+ * arch/x86/pv/mm.c
+ *
+ * Memory management code for PV guests
+ *
+ * Copyright (c) 2002-2005 K A Fraser
+ * Copyright (c) 2004 Christian Limpach
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/guest_access.h>
+
+#include <asm/pv/mm.h>
+
+
+/* Read a PV guest's l1e that maps this virtual address. */
+void pv_get_guest_eff_l1e(unsigned long addr, l1_pgentry_t *eff_l1e)
+{
+    ASSERT(!paging_mode_translate(current->domain));
+    ASSERT(!paging_mode_external(current->domain));
+
+    if ( unlikely(!__addr_ok(addr)) ||
+         __copy_from_user(eff_l1e,
+                          &__linear_l1_table[l1_linear_offset(addr)],
+                          sizeof(l1_pgentry_t)) )
+        *eff_l1e = l1e_empty();
+}
+
+/*
+ * Read the guest's l1e that maps this address, from the kernel-mode
+ * page tables.
+ */
+void pv_get_guest_eff_kern_l1e(struct vcpu *v, unsigned long addr,
+                               void *eff_l1e)
+{
+    const bool user_mode = !(v->arch.flags & TF_kernel_mode);
+
+    if ( user_mode )
+        toggle_guest_mode(v);
+
+    pv_get_guest_eff_l1e(addr, eff_l1e);
+
+    if ( user_mode )
+        toggle_guest_mode(v);
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-x86/pv/mm.h b/xen/include/asm-x86/pv/mm.h
new file mode 100644
index 0000000000..19dbc3b66c
--- /dev/null
+++ b/xen/include/asm-x86/pv/mm.h
@@ -0,0 +1,53 @@
+/*
+ * asm-x86/pv/mm.h
+ *
+ * Memory management interfaces for PV guests
+ *
+ * Copyright (C) 2017 Wei Liu <wei.liu2@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms and conditions of the GNU General Public
+ * License, version 2, as published by the Free Software Foundation.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __X86_PV_MM_H__
+#define __X86_PV_MM_H__
+
+#ifdef CONFIG_PV
+
+void pv_get_guest_eff_l1e(unsigned long addr, l1_pgentry_t *eff_l1e);
+
+void pv_get_guest_eff_kern_l1e(struct vcpu *v, unsigned long addr,
+                               void *eff_l1e);
+
+#else
+
+static inline void pv_get_guest_eff_l1e(unsigned long addr,
+                                        l1_pgentry_t *eff_l1e)
+{}
+
+static inline void pv_get_guest_eff_kern_l1e(struct vcpu *v, unsigned long 
addr,
+                                             void *eff_l1e)
+{}
+
+#endif
+
+#endif /* __X86_PV_MM_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.11.0


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