xen: remove xen_map_block and xen_unmap_block

Replace xen_map_block with qemu_map_cache with the appropriate locking
and size parameters.
Replace xen_unmap_block with qemu_invalidate_entry.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

exec.c

@@ -53,6 +53,7 @@
 #endif
 #else /* !CONFIG_USER_ONLY */
 #include "xen-mapcache.h"
+#include "trace.h"
 #endif
 
 //#define DEBUG_TB_INVALIDATE
@@ -3088,7 +3089,7 @@ void *qemu_get_ram_ptr(ram_addr_t addr)
                 if (block->offset == 0) {
                     return qemu_map_cache(addr, 0, 1);
                 } else if (block->host == NULL) {
-                    block->host = xen_map_block(block->offset, block->length);
+                    block->host = qemu_map_cache(block->offset, block->length, 1);
                 }
             }
             return block->host + (addr - block->offset);
@@ -3117,7 +3118,7 @@ void *qemu_safe_ram_ptr(ram_addr_t addr)
                 if (block->offset == 0) {
                     return qemu_map_cache(addr, 0, 1);
                 } else if (block->host == NULL) {
-                    block->host = xen_map_block(block->offset, block->length);
+                    block->host = qemu_map_cache(block->offset, block->length, 1);
                 }
             }
             return block->host + (addr - block->offset);
@@ -3135,19 +3136,7 @@ void qemu_put_ram_ptr(void *addr)
     trace_qemu_put_ram_ptr(addr);
 
     if (xen_mapcache_enabled()) {
-        RAMBlock *block;
+            qemu_invalidate_entry(block->host);
-
-        QLIST_FOREACH(block, &ram_list.blocks, next) {
-            if (addr == block->host) {
-                break;
-            }
-        }
-        if (block && block->host) {
-            xen_unmap_block(block->host, block->length);
-            block->host = NULL;
-        } else {
-            qemu_invalidate_entry(addr);
-        }
     }
 }
 

xen-mapcache-stub.c

@@ -34,7 +34,3 @@ void qemu_invalidate_map_cache(void)
 void qemu_invalidate_entry(uint8_t *buffer)
 {
 }
-uint8_t *xen_map_block(target_phys_addr_t phys_addr, target_phys_addr_t size)
-{
-    return NULL;
-}

xen-mapcache.c

@@ -362,34 +362,3 @@ void qemu_invalidate_map_cache(void)
 
     mapcache_unlock();
 }
-
-uint8_t *xen_map_block(target_phys_addr_t phys_addr, target_phys_addr_t size)
-{
-    uint8_t *vaddr_base;
-    xen_pfn_t *pfns;
-    int *err;
-    unsigned int i;
-    target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT;
-
-    trace_xen_map_block(phys_addr, size);
-    phys_addr >>= XC_PAGE_SHIFT;
-
-    pfns = qemu_mallocz(nb_pfn * sizeof (xen_pfn_t));
-    err = qemu_mallocz(nb_pfn * sizeof (int));
-
-    for (i = 0; i < nb_pfn; i++) {
-        pfns[i] = phys_addr + i;
-    }
-
-    vaddr_base = xc_map_foreign_bulk(xen_xc, xen_domid, PROT_READ|PROT_WRITE,
-                                     pfns, err, nb_pfn);
-    if (vaddr_base == NULL) {
-        perror("xc_map_foreign_bulk");
-        exit(-1);
-    }
-
-    qemu_free(pfns);
-    qemu_free(err);
-
-    return vaddr_base;
-}

xen-mapcache.h

@@ -9,27 +9,12 @@
 #ifndef XEN_MAPCACHE_H
 #define XEN_MAPCACHE_H
 
-#include <sys/mman.h>
-#include "trace.h"
-
 void     qemu_map_cache_init(void);
 uint8_t  *qemu_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, uint8_t lock);
 ram_addr_t qemu_ram_addr_from_mapcache(void *ptr);
 void     qemu_invalidate_entry(uint8_t *buffer);
 void     qemu_invalidate_map_cache(void);
 
-uint8_t *xen_map_block(target_phys_addr_t phys_addr, target_phys_addr_t size);
-
-static inline void xen_unmap_block(void *addr, ram_addr_t size)
-{
-    trace_xen_unmap_block(addr, size);
-
-    if (munmap(addr, size) != 0) {
-        hw_error("xen_unmap_block: %s", strerror(errno));
-    }
-}
-
-
 #define mapcache_lock()   ((void)0)
 #define mapcache_unlock() ((void)0)