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From: Andrew Jones <drjones@redhat.com>
To: Eric Auger <eric.auger@redhat.com>
Cc: thuth@redhat.com, kvm@vger.kernel.org, maz@kernel.org,
	qemu-devel@nongnu.org, qemu-arm@nongnu.org,
	andre.przywara@arm.com, kvmarm@lists.cs.columbia.edu,
	eric.auger.pro@gmail.com
Subject: Re: [kvm-unit-tests PATCH v2 11/16] arm/arm64: ITS: Device and collection Initialization
Date: Mon, 13 Jan 2020 18:48:53 +0100
Message-ID: <20200113174853.s23dwrpquqvqpxxi@kamzik.brq.redhat.com> (raw)
In-Reply-To: <20200110145412.14937-12-eric.auger@redhat.com>

On Fri, Jan 10, 2020 at 03:54:07PM +0100, Eric Auger wrote:
> 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>
> 
> ---
> 
> v2 -> v3:
> - s/nb_/nr_
> ---
>  lib/arm/asm/gic-v3-its.h | 20 +++++++++++++++++
>  lib/arm/gic-v3-its.c     | 46 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 66 insertions(+)
> 
> diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h
> index 0e31848..0497a78 100644
> --- a/lib/arm/asm/gic-v3-its.h
> +++ b/lib/arm/asm/gic-v3-its.h
> @@ -55,6 +55,9 @@
>  #define GITS_BASER_TYPE_DEVICE		1
>  #define GITS_BASER_TYPE_COLLECTION	4
>  
> +#define GITS_MAX_DEVICES		8
> +#define GITS_MAX_COLLECTIONS		8
> +
>  struct its_typer {
>  	unsigned int ite_size;
>  	unsigned int eventid_bits;
> @@ -79,12 +82,27 @@ struct its_cmd_block {
>  	u64     raw_cmd[4];
>  };
>  
> +struct its_device {
> +	u32 device_id;	/* device ID */
> +	u32 nr_ites;	/* Max Interrupt Translation Entries */
> +	void *itt;	/* Interrupt Translation Table GPA */
> +};
> +
> +struct its_collection {
> +	u64 target_address;
> +	u16 col_id;
> +};
> +
>  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;
> +	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;
> @@ -101,6 +119,8 @@ extern u8 get_lpi_config(int n);
>  extern void set_pending_table_bit(int rdist, int n, bool set);
>  extern void gicv3_rdist_ctrl_lpi(u32 redist, bool set);
>  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 /* !__ASSEMBLY__ */
>  #endif /* _ASMARM_GIC_V3_ITS_H_ */
> diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c
> index f488cca..88c08ee 100644
> --- a/lib/arm/gic-v3-its.c
> +++ b/lib/arm/gic-v3-its.c
> @@ -257,3 +257,49 @@ 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_baser *baser;
> +	struct its_device *new;
> +	unsigned long n, order;
> +
> +	if (its_data.nr_devices >= GITS_MAX_DEVICES)
> +		report_abort("%s redimension GITS_MAX_DEVICES", __func__);
> +
> +	baser = its_lookup_baser(GITS_BASER_TYPE_DEVICE);
> +	if (!baser)
> +		return NULL;
> +
> +	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;
> +	order = is_power_of_2(n) ? fls(n) : fls(n) + 1;
> +	new->itt = (void *)virt_to_phys(alloc_pages(order));
> +
> +	its_data.nr_devices++;
> +	return new;
> +}
> +
> +struct its_collection *its_create_collection(u32 col_id, u32 pe)
> +{
> +	struct its_collection *new;
> +
> +	if (its_data.nr_collections >= GITS_MAX_COLLECTIONS)
> +		report_abort("%s redimension GITS_MAX_COLLECTIONS", __func__);
> +
> +	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
>

Please replace the if (cond) report_abort(...)'s with assert_msg(cond, ...)'s.

Thanks,
drew 

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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 ` [kvm-unit-tests PATCH v2 08/16] arm/arm64: ITS: Init the command queue Eric Auger
2020-01-13 17:37   ` 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 [this message]
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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