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Blame SOURCES/kvm-memory-move-bitmap-synchronization-to-its-own-functi.patch

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From e484992052b63d94c3bcdce6f070eb55f635212b Mon Sep 17 00:00:00 2001
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From: Juan Quintela <quintela@redhat.com>
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Date: Tue, 14 Jan 2014 15:07:48 +0100
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Subject: [PATCH 37/40] memory: move bitmap synchronization to its own function
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Juan Quintela <quintela@redhat.com>
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Message-id: <1389712071-23303-38-git-send-email-quintela@redhat.com>
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Patchwork-id: 56692
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O-Subject: [RHEL7 qemu-kvm PATCH 37/40] memory: move bitmap synchronization to its own function
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Bugzilla: 997559
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>
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We want to have all the functions that handle directly the dirty
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bitmap near.  We will change it later.
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Signed-off-by: Juan Quintela <quintela@redhat.com>
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Reviewed-by: Orit Wasserman <owasserm@redhat.com>
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(cherry picked from commit 5ff7fb77b3cee8e26648e4fdccb23a77c2a6d3c6)
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Conflicts:
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	kvm-all.c
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commit dd1750d7981cf9e38985c9dfa474dcdbbe236270
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Author: Andreas Färber <afaerber@suse.de>
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Date:   Wed May 1 13:45:44 2013 +0200
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    kvm: Change kvm_cpu_synchronize_state() argument to CPUState
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Signed-off-by: Juan Quintela <quintela@trasno.org>
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---
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 include/exec/ram_addr.h | 31 +++++++++++++++++++++++++++++++
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 kvm-all.c               | 26 ++------------------------
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 2 files changed, 33 insertions(+), 24 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 include/exec/ram_addr.h |   31 +++++++++++++++++++++++++++++++
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 kvm-all.c               |   28 +++-------------------------
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 2 files changed, 34 insertions(+), 25 deletions(-)
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diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
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index 0caa239..9962e12 100644
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--- a/include/exec/ram_addr.h
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+++ b/include/exec/ram_addr.h
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@@ -78,6 +78,37 @@ static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
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     xen_modified_memory(start, length);
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 }
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+static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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+                                                          ram_addr_t start,
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+                                                          ram_addr_t pages)
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+{
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+    unsigned int i, j;
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+    unsigned long page_number, c;
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+    hwaddr addr;
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+    ram_addr_t ram_addr;
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+    unsigned int len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
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+    unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
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+
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+    /*
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+     * bitmap-traveling is faster than memory-traveling (for addr...)
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+     * especially when most of the memory is not dirty.
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+     */
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+    for (i = 0; i < len; i++) {
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+        if (bitmap[i] != 0) {
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+            c = leul_to_cpu(bitmap[i]);
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+            do {
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+                j = ffsl(c) - 1;
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+                c &= ~(1ul << j);
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+                page_number = (i * HOST_LONG_BITS + j) * hpratio;
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+                addr = page_number * TARGET_PAGE_SIZE;
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+                ram_addr = start + addr;
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+                cpu_physical_memory_set_dirty_range(ram_addr,
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+                                                    TARGET_PAGE_SIZE * hpratio);
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+            } while (c != 0);
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+        }
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+    }
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+}
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+
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 static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
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                                                          ram_addr_t length,
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                                                          unsigned client)
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diff --git a/kvm-all.c b/kvm-all.c
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index d3aa869..19acd58 100644
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--- a/kvm-all.c
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+++ b/kvm-all.c
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@@ -365,32 +365,10 @@ static int kvm_set_migration_log(int enable)
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 static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
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                                          unsigned long *bitmap)
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 {
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-    unsigned int i, j;
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-    unsigned long page_number, c;
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-    hwaddr addr;
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     ram_addr_t start = section->offset_within_region + section->mr->ram_addr;
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-    ram_addr_t ram_addr;
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-    unsigned int len = ((section->size / getpagesize()) + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
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-    unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
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+    ram_addr_t pages = section->size / getpagesize();
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-    /*
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-     * bitmap-traveling is faster than memory-traveling (for addr...)
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-     * especially when most of the memory is not dirty.
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-     */
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-    for (i = 0; i < len; i++) {
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-        if (bitmap[i] != 0) {
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-            c = leul_to_cpu(bitmap[i]);
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-            do {
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-                j = ffsl(c) - 1;
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-                c &= ~(1ul << j);
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-                page_number = (i * HOST_LONG_BITS + j) * hpratio;
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-                addr = page_number * TARGET_PAGE_SIZE;
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-                ram_addr = start + addr;
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-                cpu_physical_memory_set_dirty_range(ram_addr,
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-                                                    TARGET_PAGE_SIZE * hpratio);
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-            } while (c != 0);
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-        }
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-    }
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+    cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
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     return 0;
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 }
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-- 
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1.7.1
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