From: Vinod Koul <vkoul@kernel.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>,
Thierry Reding <thierry.reding@gmail.com>,
Laurentiu Tudor <laurentiu.tudor@nxp.com>,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Jonathan Marek <jonathan@marek.ca>,
linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH 0/5] iommu/arm-smmu: Support maintaining bootloader mappings
Date: Thu, 9 Jul 2020 13:03:30 +0530 [thread overview]
Message-ID: <20200709073330.GI34333@vkoul-mobl> (raw)
In-Reply-To: <20200709050145.3520931-1-bjorn.andersson@linaro.org>
On 08-07-20, 22:01, Bjorn Andersson wrote:
> Based on previous attempts and discussions this is the latest attempt at
> inheriting stream mappings set up by the bootloader, for e.g. boot splash or
> efifb.
>
> The first patch is an implementation of Robin's suggestion that we should just
> mark the relevant stream mappings as BYPASS. Relying on something else to set
> up the stream mappings wanted - e.g. by reading it back in platform specific
> implementation code.
>
> The series then tackles the problem seen in most versions of Qualcomm firmware,
> that the hypervisor intercepts BYPASS writes and turn them into FAULTs. It does
> this by allocating context banks for identity domains as well, with translation
> disabled.
>
> Lastly it amends the stream mapping initialization code to allocate a specific
> identity domain that is used for any mappings inherited from the bootloader, if
> above Qualcomm quirk is required.
>
>
> The series has been tested and shown to allow booting SDM845, SDM850, SM8150,
> SM8250 with boot splash screen setup by the bootloader. Specifically it also
> allows the Lenovo Yoga C630 to boot with SMMU and efifb enabled.
This resolves issue on RB3 for me so:
Tested-by: Vinod Koul <vkoul@kernel.org>
--
~Vinod
next prev parent reply other threads:[~2020-07-09 7:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 5:01 [PATCH 0/5] iommu/arm-smmu: Support maintaining bootloader mappings Bjorn Andersson
2020-07-09 5:01 ` [PATCH 1/5] iommu/arm-smmu: Make all valid stream mappings BYPASS Bjorn Andersson
2020-07-13 21:25 ` kernel test robot
2020-07-13 21:25 ` [RFC PATCH] iommu/arm-smmu: arm_smmu_setup_identity() can be static kernel test robot
2020-07-15 23:20 ` [PATCH 1/5] iommu/arm-smmu: Make all valid stream mappings BYPASS kernel test robot
2020-07-09 5:01 ` [PATCH 2/5] iommu/arm-smmu: Emulate bypass by using context banks Bjorn Andersson
2020-07-09 16:17 ` Rob Clark
2020-07-09 16:48 ` Bjorn Andersson
2020-07-09 16:56 ` Rob Clark
2020-07-09 18:55 ` Rob Clark
2020-07-09 19:40 ` Bjorn Andersson
2020-07-09 5:01 ` [PATCH 3/5] iommu/arm-smmu: Move SMR and S2CR definitions to header file Bjorn Andersson
2020-07-09 5:01 ` [PATCH 4/5] iommu/arm-smmu-qcom: Consstently initialize stream mappings Bjorn Andersson
2020-07-09 7:32 ` Vinod Koul
2020-07-09 5:01 ` [PATCH 5/5] iommu/arm-smmu: Setup identity domain for boot mappings Bjorn Andersson
2020-07-09 15:50 ` Laurentiu Tudor
2020-07-09 19:57 ` Bjorn Andersson
2020-07-28 15:27 ` Laurentiu Tudor
2020-07-09 7:33 ` Vinod Koul [this message]
2020-07-10 5:25 ` [PATCH 0/5] iommu/arm-smmu: Support maintaining bootloader mappings John Stultz
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