diff options
| author | AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> | 2021-12-08 11:34:22 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2022-02-01 00:00:46 +0300 |
| commit | 943515090ec67f81f6f93febfddb8c9118357e97 (patch) | |
| tree | d7b2e9701288cb3b12144c66beef813854632789 /drivers/firmware/qcom_scm.c | |
| parent | 7823e5aa5d1dd9ed5849923c165eb8f29ad23c54 (diff) | |
| download | linux-943515090ec67f81f6f93febfddb8c9118357e97.tar.xz | |
firmware: qcom: scm: Add function to set the maximum IOMMU pool size
This is not necessary for basic functionality of the IOMMU, but
it's an optimization that tells to the TZ what's the maximum
mappable size for the secure IOMMUs, so that it can optimize
the data structures in the TZ itself.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
[Marijn: ported from 5.3 to the unified architecture in 5.11]
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211208083423.22037-3-marijn.suijten@somainline.org
Diffstat (limited to 'drivers/firmware/qcom_scm.c')
| -rw-r--r-- | drivers/firmware/qcom_scm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 3f67bf774821..d5a9ba15e2ba 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -759,6 +759,21 @@ int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare) } EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init); +int qcom_scm_iommu_set_cp_pool_size(u32 spare, u32 size) +{ + struct qcom_scm_desc desc = { + .svc = QCOM_SCM_SVC_MP, + .cmd = QCOM_SCM_MP_IOMMU_SET_CP_POOL_SIZE, + .arginfo = QCOM_SCM_ARGS(2), + .args[0] = size, + .args[1] = spare, + .owner = ARM_SMCCC_OWNER_SIP, + }; + + return qcom_scm_call(__scm->dev, &desc, NULL); +} +EXPORT_SYMBOL(qcom_scm_iommu_set_cp_pool_size); + int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size, u32 cp_nonpixel_start, u32 cp_nonpixel_size) |