diff options
| author | Sunil Khatri <sunilkh@codeaurora.org> | 2018-07-19 17:10:39 +0530 |
|---|---|---|
| committer | Sunil Khatri <sunilkh@codeaurora.org> | 2018-10-08 18:58:59 +0530 |
| commit | 3d69d2b9493206838d2c2d7a41b71321a73a802a (patch) | |
| tree | 21d67d12b1cc0b4ff9d24020afef853681f0a648 /drivers/gpu | |
| parent | 727593cbf7ebb6782b2b3b45a951cc8ccc03a788 (diff) | |
msm: kgsl: Add a property to find alignment of secure buffers
Add a property to determine the hardware alignment
constraint on secure buffers. XPUv2 and below
have a minimum requirement of 1 MBytes alignment
and hence driver should allocate memory with minimum
alignment on size.
Change-Id: Ie3ca5da489bc94ae57ddc6695e402463fd7a88c2
Signed-off-by: Sunil Khatri <sunilkh@codeaurora.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/msm/kgsl.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/msm/kgsl.c b/drivers/gpu/msm/kgsl.c index 02f0cb7eb16c..41c9faf3bdd5 100644 --- a/drivers/gpu/msm/kgsl.c +++ b/drivers/gpu/msm/kgsl.c @@ -1403,6 +1403,28 @@ long kgsl_ioctl_device_getproperty(struct kgsl_device_private *dev_priv, kgsl_context_put(context); break; } + case KGSL_PROP_SECURE_BUFFER_ALIGNMENT: + { + unsigned int align; + + if (param->sizebytes != sizeof(unsigned int)) { + result = -EINVAL; + break; + } + /* + * XPUv2 impose the constraint of 1MB memory alignment, + * on the other hand Hypervisor does not have such + * constraints. So driver should fulfill such + * requirements when allocating secure memory. + */ + align = MMU_FEATURE(&dev_priv->device->mmu, + KGSL_MMU_HYP_SECURE_ALLOC) ? PAGE_SIZE : SZ_1M; + + if (copy_to_user(param->value, &align, sizeof(align))) + result = -EFAULT; + + break; + } default: if (is_compat_task()) result = dev_priv->device->ftbl->getproperty_compat( |