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Message-Id: <20221125071405.148786-10-srinivas.kandagatla@linaro.org> Date: Fri, 25 Nov 2022 07:14:04 +0000 From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org> To: gregkh@...uxfoundation.org Cc: linux-kernel@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>, Srinivas Kandagatla <srinivas.kandagatla@...aro.org> Subject: [PATCH v2 09/10] misc: fastrpc: Add mmap request assigning for static PD pool From: Abel Vesa <abel.vesa@...aro.org> If the mmap request is to add pages and thre are VMIDs associated with that context, do a call to SCM to reassign that memory. Do not do this for remote heap allocation, that is done on init create static process only. Signed-off-by: Abel Vesa <abel.vesa@...aro.org> Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org> --- drivers/misc/fastrpc.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 2dc9946c3d23..4b05cbd6083d 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1842,8 +1842,9 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) if (copy_from_user(&req, argp, sizeof(req))) return -EFAULT; - if (req.flags != ADSP_MMAP_ADD_PAGES) { + if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) { dev_err(dev, "flag not supported 0x%x\n", req.flags); + return -EINVAL; } @@ -1889,6 +1890,22 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp) /* let the client know the address to use */ req.vaddrout = rsp_msg.vaddr; + /* Add memory to static PD pool, protection thru hypervisor */ + if (req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) { + struct qcom_scm_vmperm perm; + int err = 0; + + perm.vmid = QCOM_SCM_VMID_HLOS; + perm.perm = QCOM_SCM_PERM_RWX; + err = qcom_scm_assign_mem(buf->phys, buf->size, + &(fl->cctx->vmperms[0].vmid), &perm, 1); + if (err) { + dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d", + buf->phys, buf->size, err); + goto err_assign; + } + } + spin_lock(&fl->lock); list_add_tail(&buf->node, &fl->mmaps); spin_unlock(&fl->lock); -- 2.25.1
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