[PATCH kvm-unit-tests] x86: apic: pv ipis out-of-bounds access testing

[Wanpeng Li <kernellwp@xxxxxxxxx>]

From: Wanpeng Li <wanpengli@xxxxxxxxxxx>

Adds pv ipis out-of-bounds acess testing. 

Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx>
Cc: Liran Alon <liran.alon@xxxxxxxxxx>
Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx>
---
 x86/apic.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/x86/apic.c b/x86/apic.c
index c976e8d..460d7a5 100644
--- a/x86/apic.c
+++ b/x86/apic.c
@@ -566,6 +566,15 @@ static void test_apic_change_mode(void)
 	report("TMCCT should stay at zero", !apic_read(APIC_TMCCT));
 }
 
+void test_pv_ipi()
+{
+    unsigned int nr = 10, ret;
+    unsigned long p1 = 0xFFFFFFFF, p2 = 0, p3 = 0xFFFFFFFF, p4 = 0x0;
+
+    asm volatile("vmcall" : "=a"(ret) :"a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4));
+    report("PV IPIs testing", !ret);
+}
+
 int main(void)
 {
     setup_vm();
@@ -581,6 +590,7 @@ int main(void)
 
     test_self_ipi();
     test_physical_broadcast();
+    test_pv_ipi();
 
     test_sti_nmi();
     test_multiple_nmi();
-- 
2.7.4