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Fri, 21 Nov 2025 03:02:03 -0800 (PST) Received: from hu-mojha-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-34727d5208csm5191165a91.15.2025.11.21.03.01.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Nov 2025 03:02:03 -0800 (PST) From: Mukesh Ojha Date: Fri, 21 Nov 2025 16:31:12 +0530 Subject: [PATCH v8 10/14] firmware: qcom_scm: Add SHM bridge handling for PAS when running without QHEE Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251121-kvm_rproc_v8-v8-10-8e8e9fb0eca0@oss.qualcomm.com> References: <20251121-kvm_rproc_v8-v8-0-8e8e9fb0eca0@oss.qualcomm.com> In-Reply-To: <20251121-kvm_rproc_v8-v8-0-8e8e9fb0eca0@oss.qualcomm.com> To: Bjorn Andersson , Mathieu Poirier , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Manivannan Sadhasivam , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Mukesh Ojha X-Mailer: b4 0.14-dev-f7c49 X-Developer-Signature: v=1; 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We have taken care the things required for qcom_scm_pas_auth_and_reset(). Lets put these awareness of above conditions into qcom_scm_pas_init_image() and qcom_scm_pas_metadata_release(). Reviewed-by: Konrad Dybcio Signed-off-by: Mukesh Ojha --- drivers/firmware/qcom/qcom_scm.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 90649d9ade97..84498d0d2f0c 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -623,6 +623,30 @@ static int __qcom_scm_pas_init_image(u32 pas_id, dma_a= ddr_t mdata_phys, return ret; } =20 +static int qcom_scm_pas_prep_and_init_image(struct qcom_scm_pas_context *c= tx, + const void *metadata, size_t size) +{ + struct qcom_scm_res res; + phys_addr_t mdata_phys; + void *mdata_buf; + int ret; + + mdata_buf =3D qcom_tzmem_alloc(__scm->mempool, size, GFP_KERNEL); + if (!mdata_buf) + return -ENOMEM; + + memcpy(mdata_buf, metadata, size); + mdata_phys =3D qcom_tzmem_to_phys(mdata_buf); + + ret =3D __qcom_scm_pas_init_image(ctx->pas_id, mdata_phys, &res); + if (ret < 0) + qcom_tzmem_free(mdata_buf); + else + ctx->ptr =3D mdata_buf; + + return ret ? : res.result[0]; +} + /** * qcom_scm_pas_init_image() - Initialize peripheral authentication service * state machine for a given peripheral, using the @@ -648,6 +672,9 @@ int qcom_scm_pas_init_image(u32 pas_id, const void *met= adata, size_t size, void *mdata_buf; int ret; =20 + if (ctx && ctx->has_iommu) + return qcom_scm_pas_prep_and_init_image(ctx, metadata, size); + /* * During the scm call memory protection will be enabled for the meta * data blob, so make sure it's physically contiguous, 4K aligned and @@ -689,7 +716,10 @@ void qcom_scm_pas_metadata_release(struct qcom_scm_pas= _context *ctx) if (!ctx->ptr) return; =20 - dma_free_coherent(__scm->dev, ctx->size, ctx->ptr, ctx->phys); + if (ctx->has_iommu) + qcom_tzmem_free(ctx->ptr); + else + dma_free_coherent(__scm->dev, ctx->size, ctx->ptr, ctx->phys); =20 ctx->ptr =3D NULL; } --=20 2.50.1