Hi Elliot,
Thanks for the comments!
On 7/29/20 8:15 PM, Elliot Berman wrote:
> ++
>
> On 7/24/2020 8:04 AM, Stanimir Varbanov wrote:
>> Hi,
>>
>> Gentle ping for review.
>>
>> On 7/9/20 2:58 PM, Stanimir Varbanov wrote:
>>> This adds a new SCM memprotect command to set virtual address ranges.
>>>
>>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
>>> ---
>>> drivers/firmware/qcom_scm.c | 24 ++++++++++++++++++++++++
>>> drivers/firmware/qcom_scm.h | 1 +
>>> include/linux/qcom_scm.h | 8 +++++++-
>>> 3 files changed, 32 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
>>> index 0e7233a20f34..a73870255c2e 100644
>>> --- a/drivers/firmware/qcom_scm.c
>>> +++ b/drivers/firmware/qcom_scm.c
>>> @@ -864,6 +864,30 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
>>> }
>>> EXPORT_SYMBOL(qcom_scm_assign_mem);
>>>
>>> +int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
>>> + u32 cp_nonpixel_start,
>>> + u32 cp_nonpixel_size)
>>> +{
>>> + int ret;
>>> + struct qcom_scm_desc desc = {
>>> + .svc = QCOM_SCM_SVC_MP,
>>> + .cmd = QCOM_SCM_MP_VIDEO_VAR,
>>> + .arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_VAL, QCOM_SCM_VAL,
>>> + QCOM_SCM_VAL, QCOM_SCM_VAL),
>>> + .args[0] = cp_start,
>>> + .args[1] = cp_size,
>>> + .args[2] = cp_nonpixel_start,
>>> + .args[3] = cp_nonpixel_size,
>>> + .owner = ARM_SMCCC_OWNER_SIP,
>>> + };
>>> + struct qcom_scm_res res;
>>> +
>>> + ret = qcom_scm_call(__scm->dev, &desc, &res);
>>> +
>>> + return ret ? : res.result[0];
>>> +}
>>> +EXPORT_SYMBOL(qcom_scm_mem_protect_video_var);
>>> +
>
> Small nit, can you bump the function above assign_mem? It would keep order aligned with
> the macros in qcom_scm.h
Sure, I will do that.
>
>>> /**
>>> * qcom_scm_ocmem_lock_available() - is OCMEM lock/unlock interface available
>>> */
>>> diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
>>> index d9ed670da222..14da834ac593 100644
>>> --- a/drivers/firmware/qcom_scm.h
>>> +++ b/drivers/firmware/qcom_scm.h
>>> @@ -97,6 +97,7 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc,
>>> #define QCOM_SCM_MP_RESTORE_SEC_CFG 0x02
>>> #define QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE 0x03
>>> #define QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT 0x04
>>> +#define QCOM_SCM_MP_VIDEO_VAR 0x08
>>> #define QCOM_SCM_MP_ASSIGN 0x16
>>>
>>> #define QCOM_SCM_SVC_OCMEM 0x0f
>>> diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
>>> index 3d6a24697761..19b5188d17f4 100644
>>> --- a/include/linux/qcom_scm.h
>>> +++ b/include/linux/qcom_scm.h
>>> @@ -81,7 +81,9 @@ extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
>>> unsigned int *src,
>>> const struct qcom_scm_vmperm *newvm,
>>> unsigned int dest_cnt);
>>> -
>>> +extern int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
>>> + u32 cp_nonpixel_start,
>>> + u32 cp_nonpixel_size);
>
> Same here.
>
>>> extern bool qcom_scm_ocmem_lock_available(void);
>>> extern int qcom_scm_ocmem_lock(enum qcom_scm_ocmem_client id, u32 offset,
>>> u32 size, u32 mode);
>>> @@ -131,6 +133,10 @@ static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
>>> static inline int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
>>> unsigned int *src, const struct qcom_scm_vmperm *newvm,
>>> unsigned int dest_cnt) { return -ENODEV; }
>>> +extern inline int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
>>> + u32 cp_nonpixel_start,
>>> + u32 cp_nonpixel_size)
>>> + { return -ENODEV; }
>
> Same here.
>
>>>
>>> static inline bool qcom_scm_ocmem_lock_available(void) { return false; }
>>> static inline int qcom_scm_ocmem_lock(enum qcom_scm_ocmem_client id, u32 offset,
>>>
>>
>
--
regards,
Stan
