softmmu: Create qemu_target_pages_to_MiB()

Function that convert a number of target_pages into its size in MiB. Suggested-by: Richard Henderson <richard.henderson@linaro.org> Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Juan Quintela <quintela@redhat.com> Message-Id: <20230511141208.17779-2-quintela@redhat.com>
qemu · May 15, 2023 · 62c5e18 · 62c5e18
1 parent 00a3f9c
commit 62c5e18
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diff --git a/include/exec/target_page.h b/include/exec/target_page.h
@@ -18,4 +18,5 @@ size_t qemu_target_page_size(void);
 int qemu_target_page_bits(void);
 int qemu_target_page_bits_min(void);
 
+size_t qemu_target_pages_to_MiB(size_t pages);
 #endif
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
@@ -3357,6 +3357,17 @@ int qemu_target_page_bits_min(void)
     return TARGET_PAGE_BITS_MIN;
 }
 
+/* Convert target pages to MiB (2**20). */
+size_t qemu_target_pages_to_MiB(size_t pages)
+{
+    int page_bits = TARGET_PAGE_BITS;
+
+    /* So far, the largest (non-huge) page size is 64k, i.e. 16 bits. */
+    g_assert(page_bits < 20);
+
+    return pages >> (20 - page_bits);
+}
+
 bool cpu_physical_memory_is_io(hwaddr phys_addr)
 {
     MemoryRegion*mr;