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From: Andre Przywara <andre.przywara@arm.com>
To: Andrew Jones <drjones@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>
Cc: Marc Zyngier <maz@kernel.org>,
	kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org
Subject: [kvm-unit-tests PATCH 02/17] arm: gic: Generalise function names
Date: Fri,  8 Nov 2019 14:42:25 +0000
Message-ID: <20191108144240.204202-3-andre.przywara@arm.com> (raw)
In-Reply-To: <20191108144240.204202-1-andre.przywara@arm.com>

In preparation for adding functions to test SPI interrupts, generalise
some existing functions dealing with IPIs so far, since most of them
are actually generic for all kind of interrupts.
This also reformats the irq_handler() function, to later expand it
more easily.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 arm/gic.c | 40 +++++++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 19 deletions(-)

diff --git a/arm/gic.c b/arm/gic.c
index 04b3337..a114009 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -135,28 +135,30 @@ static void check_ipi_sender(u32 irqstat)
 	}
 }
 
-static void check_irqnr(u32 irqnr)
+static void check_irqnr(u32 irqnr, int expected)
 {
-	if (irqnr != IPI_IRQ)
+	if (irqnr != expected)
 		bad_irq[smp_processor_id()] = irqnr;
 }
 
-static void ipi_handler(struct pt_regs *regs __unused)
+static void irq_handler(struct pt_regs *regs __unused)
 {
 	u32 irqstat = gic_read_iar();
 	u32 irqnr = gic_iar_irqnr(irqstat);
 
-	if (irqnr != GICC_INT_SPURIOUS) {
-		gic_write_eoir(irqstat);
-		smp_rmb(); /* pairs with wmb in stats_reset */
-		++acked[smp_processor_id()];
-		check_ipi_sender(irqstat);
-		check_irqnr(irqnr);
-		smp_wmb(); /* pairs with rmb in check_acked */
-	} else {
+	if (irqnr == GICC_INT_SPURIOUS) {
 		++spurious[smp_processor_id()];
 		smp_wmb();
+		return;
 	}
+
+	gic_write_eoir(irqstat);
+
+	smp_rmb(); /* pairs with wmb in stats_reset */
+	++acked[smp_processor_id()];
+	check_ipi_sender(irqstat);
+	check_irqnr(irqnr, IPI_IRQ);
+	smp_wmb(); /* pairs with rmb in check_acked */
 }
 
 static void gicv2_ipi_send_self(void)
@@ -216,20 +218,20 @@ static void ipi_test_smp(void)
 	report_prefix_pop();
 }
 
-static void ipi_enable(void)
+static void irqs_enable(void)
 {
 	gic_enable_defaults();
 #ifdef __arm__
-	install_exception_handler(EXCPTN_IRQ, ipi_handler);
+	install_exception_handler(EXCPTN_IRQ, irq_handler);
 #else
-	install_irq_handler(EL1H_IRQ, ipi_handler);
+	install_irq_handler(EL1H_IRQ, irq_handler);
 #endif
 	local_irq_enable();
 }
 
 static void ipi_send(void)
 {
-	ipi_enable();
+	irqs_enable();
 	wait_on_ready();
 	ipi_test_self();
 	ipi_test_smp();
@@ -237,9 +239,9 @@ static void ipi_send(void)
 	exit(report_summary());
 }
 
-static void ipi_recv(void)
+static void irq_recv(void)
 {
-	ipi_enable();
+	irqs_enable();
 	cpumask_set_cpu(smp_processor_id(), &ready);
 	while (1)
 		wfi();
@@ -250,7 +252,7 @@ static void ipi_test(void *data __unused)
 	if (smp_processor_id() == IPI_SENDER)
 		ipi_send();
 	else
-		ipi_recv();
+		irq_recv();
 }
 
 static struct gic gicv2 = {
@@ -285,7 +287,7 @@ static void ipi_clear_active_handler(struct pt_regs *regs __unused)
 
 		smp_rmb(); /* pairs with wmb in stats_reset */
 		++acked[smp_processor_id()];
-		check_irqnr(irqnr);
+		check_irqnr(irqnr, IPI_IRQ);
 		smp_wmb(); /* pairs with rmb in check_acked */
 	} else {
 		++spurious[smp_processor_id()];
-- 
2.17.1

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  parent reply index

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08 14:42 [kvm-unit-tests PATCH 00/17] arm: gic: Test SPIs and interrupt groups Andre Przywara
2019-11-08 14:42 ` [kvm-unit-tests PATCH 01/17] arm: gic: Enable GIC MMIO tests for GICv3 as well Andre Przywara
2019-11-08 17:28   ` Alexandru Elisei
2019-11-12 12:49   ` Auger Eric
2019-11-08 14:42 ` Andre Przywara [this message]
2019-11-12 11:11   ` [kvm-unit-tests PATCH 02/17] arm: gic: Generalise function names Alexandru Elisei
2019-11-12 12:49   ` Auger Eric
2019-11-08 14:42 ` [kvm-unit-tests PATCH 03/17] arm: gic: Provide per-IRQ helper functions Andre Przywara
2019-11-12 12:51   ` Alexandru Elisei
2019-11-12 15:53     ` Auger Eric
2019-11-12 16:53       ` Alexandru Elisei
2019-11-12 13:49   ` Auger Eric
2019-11-08 14:42 ` [kvm-unit-tests PATCH 04/17] arm: gic: Support no IRQs test case Andre Przywara
2019-11-12 13:26   ` Alexandru Elisei
2019-11-12 21:14     ` Auger Eric
2019-11-08 14:42 ` [kvm-unit-tests PATCH 05/17] arm: gic: Prepare IRQ handler for handling SPIs Andre Przywara
2019-11-12 13:36   ` Alexandru Elisei
2019-11-12 20:56   ` Auger Eric
2019-11-08 14:42 ` [kvm-unit-tests PATCH 06/17] arm: gic: Add simple shared IRQ test Andre Przywara
2019-11-12 13:54   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 07/17] arm: gic: Extend check_acked() to allow silent call Andre Przywara
2019-11-12 15:23   ` Alexandru Elisei
2019-11-14 12:32     ` Andrew Jones
2019-11-15 11:32       ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 08/17] arm: gic: Add simple SPI MP test Andre Przywara
2019-11-12 15:41   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 09/17] arm: gic: Add test for flipping GICD_CTLR.DS Andre Przywara
2019-11-12 16:42   ` Alexandru Elisei
2019-11-14 13:39     ` Vladimir Murzin
2019-11-14 14:17       ` Andre Przywara
2019-11-14 14:50         ` Vladimir Murzin
2019-11-14 15:21           ` Alexandru Elisei
2019-11-14 15:27             ` Peter Maydell
2019-11-14 15:47               ` Alexandru Elisei
2019-11-14 15:56                 ` Peter Maydell
2019-11-08 14:42 ` [kvm-unit-tests PATCH 10/17] arm: gic: Check for writable IGROUPR registers Andre Przywara
2019-11-12 16:51   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 11/17] arm: gic: Check for validity of both group enable bits Andre Przywara
2019-11-12 16:58   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 12/17] arm: gic: Change gic_read_iar() to take group parameter Andre Przywara
2019-11-12 17:19   ` Alexandru Elisei
2019-11-14 12:50     ` Andrew Jones
2019-11-08 14:42 ` [kvm-unit-tests PATCH 13/17] arm: gic: Change write_eoir() " Andre Przywara
2019-11-08 14:42 ` [kvm-unit-tests PATCH 14/17] arm: gic: Prepare for receiving GIC group 0 interrupts via FIQs Andre Przywara
2019-11-12 17:30   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 15/17] arm: gic: Provide FIQ handler Andre Przywara
2019-11-13 10:14   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 16/17] arm: gic: Prepare interrupt statistics for both groups Andre Przywara
2019-11-13 10:44   ` Alexandru Elisei
2019-11-08 14:42 ` [kvm-unit-tests PATCH 17/17] arm: gic: Test Group0 SPIs Andre Przywara
2019-11-13 11:26   ` Alexandru Elisei

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