From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>,
"linux-snps-arc@lists.infradead.org"
<linux-snps-arc@lists.infradead.org>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/5] ARC: handle DSP presence in HW
Date: Tue, 7 Jan 2020 01:30:18 +0000 [thread overview]
Message-ID: <c261aa64-d15c-ce5b-4202-beeaca80f7b9@synopsys.com> (raw)
In-Reply-To: <6b80df9d-d0f2-d1e1-8e4b-b65531b938d9@synopsys.com>
On 1/6/20 5:03 PM, Vineet Gupta wrote:
>
>> +.macro DSP_SAVE_REGFILE_IRQ
>> +#if defined(CONFIG_ARC_DSP_KERNEL)
>> + /* Drop any changes to DSP_CTRL made by userspace so userspace won't be
>> + * able to break kernel */
>> + mov r58, DSP_CTRL_DISABLED_ALL
>> + sr r58, [ARC_AUX_DSP_CTRL]
>
This also clears the sticky flag DSP_CTRL.SAT, can you check with DSP lib folks if
they rely on this bit in any way whatsoever !
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next prev parent reply other threads:[~2020-01-07 1:30 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-27 18:03 [RFC 0/5] ARC: handle DSP presence in HW Eugeniy Paltsev
2019-12-27 18:03 ` [PATCH 1/5] ARC: pt_regs: remove hardcoded registers offset Eugeniy Paltsev
2019-12-28 21:06 ` Vineet Gupta
2019-12-27 18:03 ` [PATCH 2/5] ARC: add helpers to sanitize config options Eugeniy Paltsev
2020-01-06 22:47 ` Vineet Gupta
2019-12-27 18:03 ` [PATCH 3/5] ARC: handle DSP presence in HW Eugeniy Paltsev
2020-01-07 1:03 ` Vineet Gupta
2020-01-07 1:30 ` Vineet Gupta [this message]
2020-01-10 14:54 ` Eugeniy Paltsev
2020-01-13 16:49 ` Vineet Gupta
2019-12-27 18:03 ` [PATCH 4/5] ARC: add support for DSP-enabled userspace applications Eugeniy Paltsev
2020-01-07 18:25 ` Vineet Gupta
2020-01-09 19:01 ` Eugeniy Paltsev
2020-01-09 22:46 ` Vineet Gupta
2020-03-04 11:51 ` Eugeniy Paltsev
2020-03-04 17:58 ` Vineet Gupta
2019-12-27 18:03 ` [PATCH 5/5] ARC: allow userspace DSP applications to use AGU extensions Eugeniy Paltsev
2020-01-07 18:30 ` Vineet Gupta
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