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From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com, maz@kernel.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
	qemu-devel@nongnu.org, qemu-arm@nongnu.org
Cc: andre.przywara@arm.com, thuth@redhat.com
Subject: [kvm-unit-tests PATCH v2 08/16] arm/arm64: ITS: Init the command queue
Date: Fri, 10 Jan 2020 15:54:04 +0100
Message-ID: <20200110145412.14937-9-eric.auger@redhat.com> (raw)
In-Reply-To: <20200110145412.14937-1-eric.auger@redhat.com>

Allocate the command queue and initialize related registers:
CBASER, CREADR, CWRITER.

The command queue is 64kB. This aims at not bothing with fullness.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v2 -> v3:
- removed readr
---
 lib/arm/asm/gic-v3-its.h |  6 ++++++
 lib/arm/gic-v3-its.c     | 22 ++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
index 2f8b8f1..93814f7 100644
--- a/lib/arm/asm/gic-v3-its.h
+++ b/lib/arm/asm/gic-v3-its.h
@@ -75,10 +75,16 @@ struct its_baser {
 	int esz;
 };
 
+struct its_cmd_block {
+	u64     raw_cmd[4];
+};
+
 struct its_data {
 	void *base;
 	struct its_typer typer;
 	struct its_baser baser[GITS_BASER_NR_REGS];
+	struct its_cmd_block *cmd_base;
+	struct its_cmd_block *cmd_write;
 };
 
 extern struct its_data its_data;
diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
index 6c97569..3037c84 100644
--- a/lib/arm/gic-v3-its.c
+++ b/lib/arm/gic-v3-its.c
@@ -177,3 +177,25 @@ void set_pending_table_bit(int rdist, int n, bool set)
 		byte &= ~mask;
 	*ptr = byte;
 }
+
+/**
+ * init_cmd_queue: Allocate the command queue and initialize
+ * CBASER, CREADR, CWRITER
+ */
+void init_cmd_queue(void);
+void init_cmd_queue(void)
+{
+	unsigned long n = SZ_64K >> PAGE_SHIFT;
+	unsigned long order = fls(n);
+	u64 cbaser;
+
+	its_data.cmd_base = (void *)virt_to_phys(alloc_pages(order));
+
+	cbaser = ((u64)its_data.cmd_base | (SZ_64K / SZ_4K - 1)	|
+			GITS_CBASER_VALID);
+
+	writeq(cbaser, its_data.base + GITS_CBASER);
+
+	its_data.cmd_write = its_data.cmd_base;
+	writeq(0, its_data.base + GITS_CWRITER);
+}
-- 
2.20.1

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  parent reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-10 14:53 [kvm-unit-tests PATCH v2 00/16] arm/arm64: Add ITS tests Eric Auger
2020-01-10 14:53 ` [kvm-unit-tests PATCH v2 01/16] libcflat: Add other size defines Eric Auger
2020-01-10 14:53 ` [kvm-unit-tests PATCH v2 02/16] arm: gic: Provide per-IRQ helper functions Eric Auger
2020-01-10 14:53 ` [kvm-unit-tests PATCH v2 03/16] arm/arm64: gic: Introduce setup_irq() helper Eric Auger
2020-01-13 16:53   ` Andrew Jones
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 04/16] arm/arm64: gicv3: Add some re-distributor defines Eric Auger
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 05/16] arm/arm64: ITS: Introspection tests Eric Auger
2020-01-13 17:11   ` Andrew Jones
2020-01-13 17:33   ` Andrew Jones
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 06/16] arm/arm64: ITS: Test BASER Eric Auger
2020-01-13 17:21   ` Andrew Jones
2020-01-15 17:16     ` Auger Eric
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 07/16] arm/arm64: ITS: Set the LPI config and pending tables Eric Auger
2020-01-13 17:31   ` Andrew Jones
2020-01-10 14:54 ` Eric Auger [this message]
2020-01-13 17:37   ` [kvm-unit-tests PATCH v2 08/16] arm/arm64: ITS: Init the command queue Andrew Jones
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 09/16] arm/arm64: ITS: Enable/Disable LPIs at re-distributor level Eric Auger
2020-01-13 17:44   ` Andrew Jones
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 10/16] arm/arm64: ITS: its_enable_defaults Eric Auger
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 11/16] arm/arm64: ITS: Device and collection Initialization Eric Auger
2020-01-13 17:48   ` Andrew Jones
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 12/16] arm/arm64: ITS: commands Eric Auger
2020-01-13 18:00   ` Andrew Jones
2020-01-15 17:13     ` Auger Eric
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 13/16] arm/arm64: ITS: INT functional tests Eric Auger
2020-01-13 18:17   ` Andrew Jones
2020-01-15 17:11     ` Auger Eric
2020-01-16  8:06       ` Andrew Jones
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 14/16] arm/run: Allow Migration tests Eric Auger
2020-01-13 18:40   ` Andrew Jones
2020-01-15 17:04     ` Auger Eric
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 15/16] arm/arm64: ITS: migration tests Eric Auger
2020-01-10 14:54 ` [kvm-unit-tests PATCH v2 16/16] arm/arm64: ITS: pending table migration test Eric Auger
2020-01-13 18:45   ` Andrew Jones
2020-01-15 17:06     ` Auger Eric

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