linux-kernel - Re: [PATCH 4/9] drivers/perf: hisi: Use ACPI driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250304180054.00001ffc@huawei.com>
Date: Tue, 4 Mar 2025 18:00:54 +0800
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Yicong Yang <yangyicong@...wei.com>
CC: <will@...nel.org>, <mark.rutland@....com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<prime.zeng@...ilicon.com>, <linuxarm@...wei.com>,
	<yangyicong@...ilicon.com>, <wangyushan12@...wei.com>
Subject: Re: [PATCH 4/9] drivers/perf: hisi: Use ACPI driver_data to
 retrieve SLLC PMU information

On Tue, 18 Feb 2025 17:19:55 +0800
Yicong Yang <yangyicong@...wei.com> wrote:

> From: Junhao He <hejunhao3@...wei.com>
> 
> Make use of struct acpi_device_id::driver_data for version specific
> information rather than judge the version register. This will help
> to simplify the probe process and also a bit easier for extension.
> 
> Factor out SLLC register definition to struct hisi_sllc_pmu_regs.
> No functional changes intended.
> 
> Signed-off-by: Junhao He <hejunhao3@...wei.com>
> Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
> ---
>  drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 191 ++++++++++++------
>  1 file changed, 125 insertions(+), 66 deletions(-)
> 
> diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
> index dbd079016fc4..c1fd60d397c3 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
> @@ -36,11 +36,14 @@
>  #define SLLC_SRCID_NONE			0x0
>  #define SLLC_TGTID_EN			BIT(5)
>  #define SLLC_TGTID_NONE			0x0
> -#define SLLC_TGTID_MIN_SHIFT		1
> -#define SLLC_TGTID_MAX_SHIFT		12
> -#define SLLC_SRCID_CMD_SHIFT		1
> -#define SLLC_SRCID_MSK_SHIFT		12
> +#define SLLC_TGTID_MIN_MSK		GENMASK(11, 1)
> +#define SLLC_TGTID_MAX_MSK		GENMASK(22, 12)
> +#define SLLC_SRCID_CMD_MSK		GENMASK(11, 1)
> +#define SLLC_SRCID_MSK_MSK		GENMASK(22, 12)
>  #define SLLC_NR_EVENTS			0x80
> +#define SLLC_EVENT_CNTn(cnt0, n)	((cnt0) + (n) * 8)
> +#define SLLC_FIRST_BIT(_mask)		(find_first_bit((const unsigned long *)&(_mask), 32))

If you do end up keeping this, I think there should be no need for outer brackets here.

> +#define SLLC_FIELD_PREP(_mask, _val)	(_mask & (_val << SLLC_FIRST_BIT(_mask)))