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memory: do not touch code dirty bitmap unless TCG is enabled 

cpu_physical_memory_set_dirty_lebitmap unconditionally syncs the
DIRTY_MEMORY_CODE bitmap.  This however is unused unless TCG is
enabled.

Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-03-23 11:41:32 +01:00
parent e87f7778b6
commit 9460dee4b2
1 changed files with 5 additions and 3 deletions
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8
include/exec/ram_addr.h
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@ -162,11 +162,14 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] |= temp;
ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] |= temp;
ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp;
if (tcg_enabled()) {
ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp;
}
}
}
xen_modified_memory(start, pages << TARGET_PAGE_BITS);
} else {
uint8_t clients = tcg_enabled() ? DIRTY_CLIENTS_ALL : DIRTY_CLIENTS_NOCODE;
/*
* bitmap-traveling is faster than memory-traveling (for addr...)
* especially when most of the memory is not dirty.
@ -181,8 +184,7 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
addr = page_number * TARGET_PAGE_SIZE;
ram_addr = start + addr;
cpu_physical_memory_set_dirty_range(ram_addr,
TARGET_PAGE_SIZE * hpratio,
DIRTY_CLIENTS_ALL);
TARGET_PAGE_SIZE * hpratio, clients);
} while (c != 0);
}
}