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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 10/17] arm: gic: Check for writable IGROUPR registers
Date: Fri,  8 Nov 2019 14:42:33 +0000
Message-ID: <20191108144240.204202-11-andre.przywara@arm.com> (raw)
In-Reply-To: <20191108144240.204202-1-andre.przywara@arm.com>

When both groups are avaiable to the non-secure side, the MMIO group
registers need to be writable, so that the group that an IRQ belongs to
can be programmed.

Check that the group can be flipped, after having established that both
groups are usable.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 arm/gic.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arm/gic.c b/arm/gic.c
index c882a24..485ca4f 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -683,6 +683,7 @@ static bool gicv3_check_security(void *gicd_base)
 static void test_irq_group(void *gicd_base)
 {
 	bool is_gicv3 = (gic_version() == 3);
+	u32 reg;
 
 	report_prefix_push("GROUP");
 	gic_enable_defaults();
@@ -692,6 +693,16 @@ static void test_irq_group(void *gicd_base)
 		if (!gicv3_check_security(gicd_base))
 			return;
 	}
+
+	/*
+	 * On a security aware GIC in non-secure world the IGROUPR registers
+	 * are RAZ/WI. KVM emulates a single-security-state GIC, so both
+	 * groups are available and the IGROUPR registers are writable.
+	 */
+	reg = gic_get_irq_group(SPI_IRQ);
+	gic_set_irq_group(SPI_IRQ, !reg);
+	report("IGROUPR is writable", gic_get_irq_group(SPI_IRQ) != reg);
+	gic_set_irq_group(SPI_IRQ, reg);
 }
 
 static void spi_send(void)
-- 
2.17.1

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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 ` [kvm-unit-tests PATCH 02/17] arm: gic: Generalise function names Andre Przywara
2019-11-12 11:11   ` 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 ` Andre Przywara [this message]
2019-11-12 16:51   ` [kvm-unit-tests PATCH 10/17] arm: gic: Check for writable IGROUPR registers 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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