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From: Jingyi Wang <wangjingyi11@huawei.com>
To: <drjones@redhat.com>, <kvm@vger.kernel.org>,
	<kvmarm@lists.cs.columbia.edu>
Cc: <maz@kernel.org>, <wanghaibin.wang@huawei.com>,
	<yuzenghui@huawei.com>, <eric.auger@redhat.com>,
	<wangjingyi11@huawei.com>, <prime.zeng@hisilicon.com>
Subject: [kvm-unit-tests PATCH v3 05/10] arm64: microbench: its: Add LPI latency test
Date: Fri, 31 Jul 2020 15:42:39 +0800
Message-ID: <20200731074244.20432-6-wangjingyi11@huawei.com> (raw)
In-Reply-To: <20200731074244.20432-1-wangjingyi11@huawei.com>

Triggers LPIs through the INT command and test the latency.
Mostly inherited form commit 0ef02cd6cbaa(arm/arm64: ITS: INT
functional tests).

Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
 arm/micro-bench.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/arm/micro-bench.c b/arm/micro-bench.c
index f8314db..82f3c07 100644
--- a/arm/micro-bench.c
+++ b/arm/micro-bench.c
@@ -20,6 +20,7 @@
  */
 #include <libcflat.h>
 #include <asm/gic.h>
+#include <asm/gic-v3-its.h>
 
 #define NTIMES (1U << 16)
 
@@ -156,6 +157,48 @@ static void ipi_exec(void)
 	assert_msg(irq_received, "failed to receive IPI in time, but received %d successfully\n", nr_ipi_received);
 }
 
+static bool lpi_prep(void)
+{
+	struct its_collection *col1;
+	struct its_device *dev2;
+
+	if (!gicv3_its_base())
+		return false;
+
+	its_enable_defaults();
+	dev2 = its_create_device(2 /* dev id */, 8 /* nb_ites */);
+	col1 = its_create_collection(1 /* col id */, 1 /* target PE */);
+	gicv3_lpi_set_config(8199, LPI_PROP_DEFAULT);
+
+	its_send_mapd_nv(dev2, true);
+	its_send_mapc_nv(col1, true);
+	its_send_invall_nv(col1);
+	its_send_mapti_nv(dev2, 8199 /* lpi id */, 20 /* event id */, col1);
+
+	gic_prep_common();
+	return true;
+}
+
+static void lpi_exec(void)
+{
+	struct its_device *dev2;
+	unsigned tries = 1 << 28;
+	static int received = 0;
+
+	irq_received = false;
+
+	dev2 = its_get_device(2);
+	its_send_int_nv(dev2, 20);
+
+	while (!irq_received && tries--)
+		cpu_relax();
+
+	if (irq_received)
+		++received;
+
+	assert_msg(irq_received, "failed to receive LPI in time, but received %d successfully\n", received);
+}
+
 static void hvc_exec(void)
 {
 	asm volatile("mov w0, #0x4b000000; hvc #0" ::: "w0");
@@ -201,6 +244,7 @@ static struct exit_test tests[] = {
 	{"eoi",			NULL,		eoi_exec,		true},
 	{"ipi",			ipi_prep,	ipi_exec,		true},
 	{"ipi_hw",		ipi_hw_prep,	ipi_exec,		true},
+	{"lpi",			lpi_prep,	lpi_exec,		true},
 };
 
 struct ns_time {
-- 
2.19.1



  parent reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  7:42 [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer " Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 01/10] arm64: microbench: get correct ipi received num Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 02/10] arm64: microbench: Generalize ipi test names Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 03/10] arm64: microbench: gic: Add ipi latency test for gicv4.1 support kvm Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 04/10] arm64: its: Handle its command queue wrapping Jingyi Wang
2020-07-31  7:42 ` Jingyi Wang [this message]
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 06/10] arm64: microbench: Allow each test to specify its running times Jingyi Wang
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 07/10] arm64: microbench: Add time limit for each individual test Jingyi Wang
2020-08-01 16:13   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 08/10] arm64: microbench: Add vtimer latency test Jingyi Wang
2020-08-01 16:22   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 09/10] arm64: microbench: Add test->post() to further process test results Jingyi Wang
2020-08-01 17:03   ` Andrew Jones
2020-07-31  7:42 ` [kvm-unit-tests PATCH v3 10/10] arm64: microbench: Add timer_post() to get actual PPI latency Jingyi Wang
2020-07-31 12:01 ` [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer latency test Andrew Jones
2020-08-03  2:15   ` Jingyi Wang
2020-08-01 17:40 ` Andrew Jones
2020-08-05 11:54 ` Jingyi Wang
2020-08-05 12:13   ` Marc Zyngier
2020-08-11  1:48     ` Jingyi Wang
2020-08-11  7:49       ` Marc Zyngier
2020-08-17  1:46         ` Jingyi Wang
2020-08-17  8:26           ` Marc Zyngier

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