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media: firmware: qcom_scm: Add memory protect virtual address ranges

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This adds a new SCM memprotect command to set virtual address ranges.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Elliot Berman <eberman@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Stanimir Varbanov 2020-08-17 10:27:22 +02:00 committed by Mauro Carvalho Chehab
parent 435c53c369
commit 6d885330fa
3 changed files with 32 additions and 0 deletions
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24
drivers/firmware/qcom_scm.c
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@ -756,6 +756,30 @@ int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
}
EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init);
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);
static int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
size_t mem_sz, phys_addr_t src, size_t src_sz,
phys_addr_t dest, size_t dest_sz)

1
drivers/firmware/qcom_scm.h
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@ -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

7
include/linux/qcom_scm.h
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@ -84,6 +84,9 @@ extern bool qcom_scm_restore_sec_cfg_available(void);
extern int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare);
extern int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size);
extern int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare);
extern int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
u32 cp_nonpixel_start,
u32 cp_nonpixel_size);
extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
unsigned int *src,
const struct qcom_scm_vmperm *newvm,
@ -141,6 +144,10 @@ static inline int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
{ return -ENODEV; }
static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
{ 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; }
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; }