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exec/ram_addr: Return number of dirty pages in cpu_physical_memory_set_dirty_lebitmap()
In preparation for including the number of dirty pages in the vfio_get_dirty_bitmap() tracepoint, return the number of dirty pages in cpu_physical_memory_set_dirty_lebitmap() similar to cpu_physical_memory_sync_dirty_bitmap(). To avoid counting twice when GLOBAL_DIRTY_RATE is enabled, stash the number of bits set per bitmap quad in a variable (@nbits) and reuse it there. Signed-off-by: Joao Martins <joao.m.martins@oracle.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230530180556.24441-2-joao.m.martins@oracle.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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@ -334,14 +334,23 @@ static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
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}
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#if !defined(_WIN32)
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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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* Contrary to cpu_physical_memory_sync_dirty_bitmap() this function returns
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* the number of dirty pages in @bitmap passed as argument. On the other hand,
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* cpu_physical_memory_sync_dirty_bitmap() returns newly dirtied pages that
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* weren't set in the global migration bitmap.
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*/
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static inline
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uint64_t 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 long i, j;
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unsigned long page_number, c;
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unsigned long page_number, c, nbits;
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hwaddr addr;
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ram_addr_t ram_addr;
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uint64_t num_dirty = 0;
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unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
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unsigned long hpratio = qemu_real_host_page_size() / TARGET_PAGE_SIZE;
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unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
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@ -369,6 +378,7 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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if (bitmap[k]) {
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unsigned long temp = leul_to_cpu(bitmap[k]);
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nbits = ctpopl(temp);
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qatomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp);
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if (global_dirty_tracking) {
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@ -377,10 +387,12 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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temp);
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if (unlikely(
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global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE)) {
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total_dirty_pages += ctpopl(temp);
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total_dirty_pages += nbits;
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}
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}
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num_dirty += nbits;
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if (tcg_enabled()) {
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qatomic_or(&blocks[DIRTY_MEMORY_CODE][idx][offset],
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temp);
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@ -409,9 +421,11 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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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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nbits = ctpopl(c);
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if (unlikely(global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE)) {
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total_dirty_pages += ctpopl(c);
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total_dirty_pages += nbits;
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}
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num_dirty += nbits;
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do {
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j = ctzl(c);
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c &= ~(1ul << j);
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@ -424,6 +438,8 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
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}
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}
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}
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return num_dirty;
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}
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#endif /* not _WIN32 */
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