[PATCH for v24 v3 3/4] x86/sgx: Detach sgx_encl_add_page() from struct sgx_enclave_add_pages

[Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>]

Internals should not have direct bindings to the ioctl API. Therefore,
unpack &sgx_enclave_add_pages and pass its fields as separate parameters to
sgx_enclave_add_page(). This will also remove an inconsistency: secinfo is
already passed as a separate parameter whereas other fields are read from
the struct.

Cc: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
---
 arch/x86/kernel/cpu/sgx/ioctl.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c
index a2b411a8236d..f08008bef943 100644
--- a/arch/x86/kernel/cpu/sgx/ioctl.c
+++ b/arch/x86/kernel/cpu/sgx/ioctl.c
@@ -360,16 +360,16 @@ static int __sgx_encl_extend(struct sgx_encl *encl,
 	return 0;
 }
 
-static int sgx_encl_add_page(struct sgx_encl *encl,
-			     struct sgx_enclave_add_pages *addp,
-			     struct sgx_secinfo *secinfo)
+static int sgx_encl_add_page(struct sgx_encl *encl, unsigned long src,
+			     unsigned long offset, unsigned long length,
+			     struct sgx_secinfo *secinfo, unsigned long flags)
 {
 	struct sgx_encl_page *encl_page;
 	struct sgx_epc_page *epc_page;
 	struct sgx_va_page *va_page;
 	int ret;
 
-	encl_page = sgx_encl_page_alloc(encl, addp->offset, secinfo->flags);
+	encl_page = sgx_encl_page_alloc(encl, offset, secinfo->flags);
 	if (IS_ERR(encl_page))
 		return PTR_ERR(encl_page);
 
@@ -412,7 +412,7 @@ static int sgx_encl_add_page(struct sgx_encl *encl,
 		goto err_out_unlock;
 
 	ret = __sgx_encl_add_page(encl, encl_page, epc_page, secinfo,
-				  addp->src);
+				  src);
 	if (ret) {
 		/* ENCLS failure. */
 		if (ret == -EIO)
@@ -430,7 +430,7 @@ static int sgx_encl_add_page(struct sgx_encl *encl,
 	encl_page->epc_page = epc_page;
 	encl->secs_child_cnt++;
 
-	if (addp->flags & SGX_PAGE_MEASURE) {
+	if (flags & SGX_PAGE_MEASURE) {
 		ret = __sgx_encl_extend(encl, epc_page);
 
 		/* ENCLS failure. */
@@ -547,7 +547,8 @@ static long sgx_ioc_enclave_add_pages(struct sgx_encl *encl, void __user *arg)
 		if (need_resched())
 			cond_resched();
 
-		ret = sgx_encl_add_page(encl, &addp, &secinfo);
+		ret = sgx_encl_add_page(encl, addp.src, addp.offset,
+					addp.length, &secinfo, addp.flags);
 		if (ret)
 			break;
 
-- 
2.20.1