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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 v7 08/13] arm/arm64: ITS: Device and collection Initialization
Date: Fri, 20 Mar 2020 10:24:23 +0100
Message-ID: <20200320092428.20880-9-eric.auger@redhat.com> (raw)
In-Reply-To: <20200320092428.20880-1-eric.auger@redhat.com>

Introduce an helper functions to register
- a new device, characterized by its device id and the
  max number of event IDs that dimension its ITT (Interrupt
  Translation Table).  The function allocates the ITT.

- a new collection, characterized by its ID and the
  target processing engine (PE).

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

---

v3 -> v4:
- remove unused its_baser variable from its_create_device()
- use get_order()
- device->itt becomes a GVA instead of GPA

v2 -> v3:
- s/report_abort/assert

v1 -> v2:
- s/nb_/nr_
---
 lib/arm64/asm/gic-v3-its.h | 19 +++++++++++++++++++
 lib/arm64/gic-v3-its.c     | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/lib/arm64/asm/gic-v3-its.h b/lib/arm64/asm/gic-v3-its.h
index 4683011..adcb642 100644
--- a/lib/arm64/asm/gic-v3-its.h
+++ b/lib/arm64/asm/gic-v3-its.h
@@ -31,6 +31,19 @@ struct its_baser {
 };
 
 #define GITS_BASER_NR_REGS		8
+#define GITS_MAX_DEVICES		8
+#define GITS_MAX_COLLECTIONS		8
+
+struct its_device {
+	u32 device_id;	/* device ID */
+	u32 nr_ites;	/* Max Interrupt Translation Entries */
+	void *itt;	/* Interrupt Translation Table GVA */
+};
+
+struct its_collection {
+	u64 target_address;
+	u16 col_id;
+};
 
 struct its_data {
 	void *base;
@@ -39,6 +52,10 @@ struct its_data {
 	struct its_baser coll_baser;
 	struct its_cmd_block *cmd_base;
 	struct its_cmd_block *cmd_write;
+	struct its_device devices[GITS_MAX_DEVICES];
+	u32 nr_devices;		/* Allocated Devices */
+	struct its_collection collections[GITS_MAX_COLLECTIONS];
+	u32 nr_collections;	/* Allocated Collections */
 };
 
 extern struct its_data its_data;
@@ -93,5 +110,7 @@ extern void its_parse_typer(void);
 extern void its_init(void);
 extern int its_baser_lookup(int i, struct its_baser *baser);
 extern void its_enable_defaults(void);
+extern struct its_device *its_create_device(u32 dev_id, int nr_ites);
+extern struct its_collection *its_create_collection(u32 col_id, u32 target_pe);
 
 #endif /* _ASMARM64_GIC_V3_ITS_H_ */
diff --git a/lib/arm64/gic-v3-its.c b/lib/arm64/gic-v3-its.c
index afc66a3..f0a0381 100644
--- a/lib/arm64/gic-v3-its.c
+++ b/lib/arm64/gic-v3-its.c
@@ -109,3 +109,41 @@ void its_enable_defaults(void)
 
 	writel(GITS_CTLR_ENABLE, its_data.base + GITS_CTLR);
 }
+
+struct its_device *its_create_device(u32 device_id, int nr_ites)
+{
+	struct its_device *new;
+	unsigned long n;
+
+	assert(its_data.nr_devices < GITS_MAX_DEVICES);
+
+	new = &its_data.devices[its_data.nr_devices];
+
+	new->device_id = device_id;
+	new->nr_ites = nr_ites;
+
+	n = (its_data.typer.ite_size * nr_ites) >> PAGE_SHIFT;
+	new->itt = alloc_pages(get_order(n));
+
+	its_data.nr_devices++;
+	return new;
+}
+
+struct its_collection *its_create_collection(u32 col_id, u32 pe)
+{
+	struct its_collection *new;
+
+	assert(its_data.nr_collections < GITS_MAX_COLLECTIONS);
+
+	new = &its_data.collections[its_data.nr_collections];
+
+	new->col_id = col_id;
+
+	if (its_data.typer.pta)
+		new->target_address = (u64)gicv3_data.redist_base[pe];
+	else
+		new->target_address = pe << 16;
+
+	its_data.nr_collections++;
+	return new;
+}
-- 
2.20.1

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  parent reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-20  9:24 [kvm-unit-tests PATCH v7 00/13] arm/arm64: Add ITS tests Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 01/13] libcflat: Add other size defines Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 02/13] page_alloc: Introduce get_order() Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 03/13] arm/arm64: gic: Introduce setup_irq() helper Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 04/13] arm/arm64: gicv3: Add some re-distributor defines Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 05/13] arm/arm64: gicv3: Set the LPI config and pending tables Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 06/13] arm/arm64: ITS: Introspection tests Eric Auger
2020-03-30  8:30   ` Zenghui Yu
2020-03-30  8:46     ` Auger Eric
2020-03-30  9:11       ` Andrew Jones
2020-03-30  9:56         ` Auger Eric
2020-03-30 10:19           ` Andrew Jones
2020-03-30 10:24             ` Auger Eric
2020-03-30 12:20         ` Zenghui Yu
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 07/13] arm/arm64: ITS: its_enable_defaults Eric Auger
2020-03-20  9:24 ` Eric Auger [this message]
2020-03-25  8:10   ` [kvm-unit-tests PATCH v7 08/13] arm/arm64: ITS: Device and collection Initialization Zenghui Yu
2020-03-25 21:20     ` Auger Eric
2020-03-30  9:13       ` Andrew Jones
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 09/13] arm/arm64: ITS: Commands Eric Auger
2020-03-30  9:22   ` Zenghui Yu
2020-03-30  9:57     ` Auger Eric
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 10/13] arm/arm64: ITS: INT functional tests Eric Auger
2020-03-30 10:43   ` Zenghui Yu
2020-04-02  8:50     ` Auger Eric
2020-04-02 12:40       ` Zenghui Yu
2020-04-02 14:41         ` Andrew Jones
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 11/13] arm/run: Allow Migration tests Eric Auger
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 12/13] arm/arm64: ITS: migration tests Eric Auger
2020-03-30 10:55   ` Zenghui Yu
2020-03-20  9:24 ` [kvm-unit-tests PATCH v7 13/13] arm/arm64: ITS: pending table migration test Eric Auger
2020-03-30 12:06   ` Zenghui Yu
2020-03-30 12:38     ` Auger Eric
2020-03-30 13:17       ` Zenghui Yu

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