[PATCH v7 6/8] xen: mapcache: Pass the ram_addr offset to xen_map_cache()

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

From: "Edgar E. Iglesias" <edgar.iglesias@amd.com>

Pass the ram_addr offset to xen_map_cache.
This is in preparation for adding grant mappings that need
to compute the address within the RAMBlock.

No functional changes.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
 hw/xen/xen-mapcache.c         | 16 +++++++++++-----
 include/sysemu/xen-mapcache.h |  2 ++
 system/physmem.c              |  9 +++++----
 3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c
index ec95445696..a07c47b0b1 100644
--- a/hw/xen/xen-mapcache.c
+++ b/hw/xen/xen-mapcache.c
@@ -167,7 +167,8 @@ static void xen_remap_bucket(MapCache *mc,
                              void *vaddr,
                              hwaddr size,
                              hwaddr address_index,
-                             bool dummy)
+                             bool dummy,
+                             ram_addr_t ram_offset)
 {
     uint8_t *vaddr_base;
     xen_pfn_t *pfns;
@@ -266,6 +267,7 @@ static void xen_remap_bucket(MapCache *mc,
 
 static uint8_t *xen_map_cache_unlocked(MapCache *mc,
                                        hwaddr phys_addr, hwaddr size,
+                                       ram_addr_t ram_offset,
                                        uint8_t lock, bool dma, bool is_write)
 {
     MapCacheEntry *entry, *pentry = NULL,
@@ -337,14 +339,16 @@ tryagain:
     if (!entry) {
         entry = g_new0(MapCacheEntry, 1);
         pentry->next = entry;
-        xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy);
+        xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy,
+                         ram_offset);
     } else if (!entry->lock) {
         if (!entry->vaddr_base || entry->paddr_index != address_index ||
                 entry->size != cache_size ||
                 !test_bits(address_offset >> XC_PAGE_SHIFT,
                     test_bit_size >> XC_PAGE_SHIFT,
                     entry->valid_mapping)) {
-            xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy);
+            xen_remap_bucket(mc, entry, NULL, cache_size, address_index, dummy,
+                             ram_offset);
         }
     }
 
@@ -391,13 +395,15 @@ tryagain:
 
 uint8_t *xen_map_cache(MemoryRegion *mr,
                        hwaddr phys_addr, hwaddr size,
+                       ram_addr_t ram_addr_offset,
                        uint8_t lock, bool dma,
                        bool is_write)
 {
     uint8_t *p;
 
     mapcache_lock(mapcache);
-    p = xen_map_cache_unlocked(mapcache, phys_addr, size, lock, dma, is_write);
+    p = xen_map_cache_unlocked(mapcache, phys_addr, size, ram_addr_offset,
+                               lock, dma, is_write);
     mapcache_unlock(mapcache);
     return p;
 }
@@ -632,7 +638,7 @@ static uint8_t *xen_replace_cache_entry_unlocked(MapCache *mc,
     trace_xen_replace_cache_entry_dummy(old_phys_addr, new_phys_addr);
 
     xen_remap_bucket(mc, entry, entry->vaddr_base,
-                     cache_size, address_index, false);
+                     cache_size, address_index, false, old_phys_addr);
     if (!test_bits(address_offset >> XC_PAGE_SHIFT,
                 test_bit_size >> XC_PAGE_SHIFT,
                 entry->valid_mapping)) {
diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h
index 1ec9e66752..b5e3ea1bc0 100644
--- a/include/sysemu/xen-mapcache.h
+++ b/include/sysemu/xen-mapcache.h
@@ -19,6 +19,7 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset,
 void xen_map_cache_init(phys_offset_to_gaddr_t f,
                         void *opaque);
 uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size,
+                       ram_addr_t ram_addr_offset,
                        uint8_t lock, bool dma,
                        bool is_write);
 ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
@@ -37,6 +38,7 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
 static inline uint8_t *xen_map_cache(MemoryRegion *mr,
                                      hwaddr phys_addr,
                                      hwaddr size,
+                                     ram_addr_t ram_addr_offset,
                                      uint8_t lock,
                                      bool dma,
                                      bool is_write)
diff --git a/system/physmem.c b/system/physmem.c
index b7847db1a2..33d09f7571 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -2231,13 +2231,14 @@ static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr,
          */
         if (xen_mr_is_memory(block->mr)) {
             return xen_map_cache(block->mr, block->offset + addr,
-                                 len, lock, lock,
-                                 is_write);
+                                 len, block->offset,
+                                 lock, lock, is_write);
         }
 
         block->host = xen_map_cache(block->mr, block->offset,
-                                    block->max_length, 1,
-                                    lock, is_write);
+                                    block->max_length,
+                                    block->offset,
+                                    1, lock, is_write);
     }
 
     return ramblock_ptr(block, addr);
-- 
2.40.1