linux-kernel - Re: [RFC PATCH 02/33] irqchip/gic-v3: Add VLPI/DirectLPI discovery

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]

Date:   Mon, 13 Feb 2017 15:39:49 -0600
From:   Shanker Donthineni <shankerd@...eaurora.org>
To:     Marc Zyngier <marc.zyngier@....com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>
Subject: Re: [RFC PATCH 02/33] irqchip/gic-v3: Add VLPI/DirectLPI discovery



On 01/17/2017 04:20 AM, Marc Zyngier wrote:
> Add helper functions that probe for VLPI and DirectLPI properties.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
> ---
>   drivers/irqchip/irq-gic-v3.c       | 22 ++++++++++++++++++++++
>   include/linux/irqchip/arm-gic-v3.h |  3 +++
>   2 files changed, 25 insertions(+)
>
> diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
> index 5cadec0..8a6de91 100644
> --- a/drivers/irqchip/irq-gic-v3.c
> +++ b/drivers/irqchip/irq-gic-v3.c
> @@ -514,6 +514,24 @@ static int gic_populate_rdist(void)
>   	return -ENODEV;
>   }
>   
> +static int __gic_update_vlpi_properties(struct redist_region *region,
> +					void __iomem *ptr)
> +{
> +	u64 typer = gic_read_typer(ptr + GICR_TYPER);
> +	gic_data.rdists.has_vlpis &= !!(typer & GICR_TYPER_VLPIS);
> +	gic_data.rdists.has_direct_lpi &= !!(typer &
> GICR_TYPER_DirectLPIS);
> +
> +	return 1;
> +}
> +
> +static void gic_update_vlpi_properties(void)
> +{
> +	gic_scan_rdist_properties(__gic_update_vlpi_properties);
> +	pr_info("%sVLPI support, %sdirect LPI support\n",
Would be better if we keep one space after 'no'?

-- 
Shanker Donthineni
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.