From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: neil.armstrong@linaro.org, Mukesh Ojha <quic_mojha@quicinc.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Bartosz Golaszewski <bartosz.golaszewski@linaro.org>,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Shiraz Hashim <quic_shashim@quicinc.com>
Subject: Re: [PATCH 3/6] remoteproc: qcom: Add helper function to support IOMMU devmem translation
Date: Thu, 17 Oct 2024 23:25:00 +0200 [thread overview]
Message-ID: <6787fffa-642a-4099-ba00-445dd2b865ef@oss.qualcomm.com> (raw)
In-Reply-To: <5fc9d581-14a6-45e8-8eda-4df49b81f15d@linaro.org>
On 10.10.2024 8:59 AM, neil.armstrong@linaro.org wrote:
> Hi,
>
> On 07/10/2024 16:37, Mukesh Ojha wrote:
>> On Mon, Oct 07, 2024 at 10:08:16AM +0200, neil.armstrong@linaro.org wrote:
>>> On 04/10/2024 23:23, Mukesh Ojha wrote:
>>>> From: Shiraz Hashim <quic_shashim@quicinc.com>
>>>>
>>>> Qualcomm SoCs runnning with Qualcomm EL2 hypervisor(QHEE), IOMMU
>>>> translation set up for remote processors is managed by QHEE itself
>>>> however, for a case when these remote processors has to run under KVM
>>>
>>> This is not true, KVM is a Linux hypervisor, remote processors have
>>> nothing to do with KVM, please rephrase.
>>
>> Thanks, perhaps something like this,
>>
>> "However, when same SoC runs with KVM configuration, remoteproc IOMMU
>> translation needs to be set from Linux host running remoteproc PAS
>> driver"
>
> Thanks but I still don't see what KVM has to do here, KVM is an an optional
> Linux kernel feature, Linux can be configured without KVM and still perfectly
> startup those remoteprocs.
Mukesh, KVM is a very specific use case. What you're referring to is
really "no QHEE / Gunyah". We can do s/KVM/Hyper-V (or almost any
other software running at EL2) and your claims still hold.
Konrad
next prev parent reply other threads:[~2024-10-17 21:25 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-04 21:23 [PATCH 0/6] Peripheral Image Loader support for Qualcomm SoCs Mukesh Ojha
2024-10-04 21:23 ` [PATCH 1/6] dt-bindings: remoteproc: qcom,pas-common: Introduce iommus and qcom,devmem property Mukesh Ojha
2024-10-06 19:38 ` Dmitry Baryshkov
2024-10-07 15:35 ` Mukesh Ojha
2024-10-07 16:25 ` Dmitry Baryshkov
2024-10-09 14:04 ` Shiraz Hashim
2024-10-10 7:15 ` Krzysztof Kozlowski
2024-10-10 8:30 ` Shiraz Hashim
2024-10-04 21:23 ` [PATCH 2/6] remoteproc: qcom: Add iommu map_unmap helper function Mukesh Ojha
2024-10-06 2:04 ` kernel test robot
2024-10-06 4:29 ` kernel test robot
2024-10-04 21:23 ` [PATCH 3/6] remoteproc: qcom: Add helper function to support IOMMU devmem translation Mukesh Ojha
2024-10-07 8:08 ` neil.armstrong
2024-10-07 14:37 ` Mukesh Ojha
2024-10-10 6:59 ` neil.armstrong
2024-10-17 21:25 ` Konrad Dybcio [this message]
2024-10-04 21:23 ` [PATCH 4/6] remoteproc: qcom: Add support to parse qcom,devmem property Mukesh Ojha
2024-10-04 21:23 ` [PATCH 5/6] remoteproc: qcom: Add support of SHM bridge to enable memory protection Mukesh Ojha
2024-10-05 22:26 ` kernel test robot
2024-10-25 19:03 ` Konrad Dybcio
2024-10-04 21:23 ` [PATCH 6/6] remoteproc: qcom: Enable map/unmap and SHM bridge support Mukesh Ojha
2024-10-07 8:05 ` neil.armstrong
2024-10-07 14:52 ` Mukesh Ojha
2024-10-08 6:21 ` Mukesh Ojha
2024-10-10 6:57 ` neil.armstrong
2024-10-11 5:05 ` Shiraz Hashim
2024-10-11 6:23 ` Dmitry Baryshkov
2024-10-11 7:09 ` Shiraz Hashim
2024-10-11 7:12 ` Dmitry Baryshkov
2024-10-14 12:31 ` Shiraz Hashim
2024-10-14 12:38 ` Dmitry Baryshkov
2024-10-11 7:11 ` Mukesh Ojha
2024-10-11 7:09 ` neil.armstrong
2024-10-14 12:29 ` Shiraz Hashim
2024-10-25 19:07 ` Konrad Dybcio
2024-10-06 19:34 ` [PATCH 0/6] Peripheral Image Loader support for Qualcomm SoCs Dmitry Baryshkov
2024-10-07 18:39 ` Mukesh Ojha
2024-10-09 13:50 ` Shiraz Hashim
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