[PATCH] system/physmem: Fix cpu_memory_rw_debug for armv7m MPU

[Xiong Nandi]

The actual page size (region size for MPU) of armv7m may
smaller than TARGET_PAGE_SIZE (2^5 vs 2^10). So we should
use the actual virtual address to get the phys page address.

Signed-off-by: Xiong Nandi <xndchn@gmail.com>
---
 system/physmem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/system/physmem.c b/system/physmem.c
index dc1db3a384..a76b305130 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -3564,11 +3564,12 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
         MemTxResult res;
 
         page = addr & TARGET_PAGE_MASK;
-        phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs);
+        phys_addr = cpu_get_phys_page_attrs_debug(cpu, addr, &attrs);
         asidx = cpu_asidx_from_attrs(cpu, attrs);
         /* if no physical page mapped, return an error */
         if (phys_addr == -1)
             return -1;
+        phys_addr &= TARGET_PAGE_MASK;
         l = (page + TARGET_PAGE_SIZE) - addr;
         if (l > len)
             l = len;
-- 
2.25.1