kvm: Use 32-bit operand size prefix for rdfs8()

E820 memory map resides in EBDA region which starts at address 0x9fc00 which
doesn't fit in 16 bits. Therefore, use 'addr32' operand size prefix to fix the
following error:

  bios/e820.c: Assembler messages:
  bios/e820.c:14: Warning: 654336 shortened to 64512

Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

diff --git a/tools/kvm/bios/e820.c b/tools/kvm/bios/e820.c
index 4032871849a8308f4d6a4e47a96feec87b15873c..6f00cb6848ed1b06cc206a69828969c8d79eb59a 100644 (file)
--- a/tools/kvm/bios/e820.c
+++ b/tools/kvm/bios/e820.c
@@ -11,7 +11,9 @@ static inline void outb(uint8_t v, uint16_t port)
 static inline uint8_t rdfs8(unsigned long addr)
 {
        uint8_t v;
-       asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(uint8_t *)addr));
+
+       asm volatile("addr32 movb %%fs:%1,%0" : "=q" (v) : "m" (*(uint8_t *)addr));
+
        return v;
 }