x86: emulator: additional smsw test-case
An additional test case for the emulator was added to test smsw which is
trapped by the emulator. The other existing test-cases occur in the guest (at
least on VMX), since the values are read directly from the CR0 read shadow.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/x86/emulator.c b/x86/emulator.c
index 20e3a45..033f246 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -336,7 +336,7 @@
report("lock notb", *mb == vb);
}
-void test_smsw(void)
+void test_smsw(uint64_t *h_mem)
{
char mem[16];
unsigned short msw, msw_orig, *pmsw;
@@ -355,6 +355,12 @@
if (i != 4 && pmsw[i])
zero = 0;
report("smsw (2)", msw == pmsw[4] && zero);
+
+ /* Trigger exit on smsw */
+ *h_mem = 0x12345678abcdeful;
+ asm volatile("smsw %0" : "=m"(*h_mem));
+ report("smsw (3)", msw == (unsigned short)*h_mem &&
+ (*h_mem & ~0xfffful) == 0x12345678ab0000ul);
}
void test_lmsw(void)
@@ -998,7 +1004,7 @@
test_cr8();
- test_smsw();
+ test_smsw(mem);
test_lmsw();
test_ljmp(mem);
test_stringio();
