linux-kernel - [PATCH kvm-unit-tests 5/5] x86: Test monitor and mwait on real-mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 18 Jun 2014 17:19:54 +0300
From:	Nadav Amit <namit@...technion.ac.il>
To:	pbonzini@...hat.com
Cc:	gleb@...nel.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, x86@...nel.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, Nadav Amit <namit@...technion.ac.il>
Subject: [PATCH kvm-unit-tests 5/5] x86: Test monitor and mwait on real-mode

monitor and mwait are now considered to behave as nop.  New patch enables
monitor and mwait in realmode as well.  This test checks whether they are
handled as nop in realmode as well.

Signed-off-by: Nadav Amit <namit@...technion.ac.il>
---
 x86/realmode.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/x86/realmode.c b/x86/realmode.c
index 10c3e03..0a62b5d 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -1671,6 +1671,16 @@ void test_xadd(void)
 	report("xadd", R_AX, outregs.eax == inregs.eax * 2);
 }
 
+void test_monitor_mwait(void)
+{
+	MK_INSN(monitor, "monitor\n\t"
+			 "mwait\n\t");
+	inregs.ecx = 0;
+	inregs.eax = 0;
+	exec_in_big_real_mode(&insn_monitor);
+	report("monitor", 0, 1);
+}
+ 
 
 void realmode_start(void)
 {
@@ -1721,6 +1731,7 @@ void realmode_start(void)
 	test_smsw();
 	test_nopl();
 	test_xadd();
+	test_monitor_mwait();
 	test_perf_loop();
 	test_perf_mov();
 	test_perf_arith();
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/