Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "API:
   - Add the ability to abort a skcipher walk.

  Algorithms:
   - Fix XTS to actually do the stealing.
   - Add library helpers for AES and DES for single-block users.
   - Add library helpers for SHA256.
   - Add new DES key verification helper.
   - Add surrounding bits for ESSIV generator.
   - Add accelerations for aegis128.
   - Add test vectors for lzo-rle.

  Drivers:
   - Add i.MX8MQ support to caam.
   - Add gcm/ccm/cfb/ofb aes support in inside-secure.
   - Add ofb/cfb aes support in media-tek.
   - Add HiSilicon ZIP accelerator support.

  Others:
   - Fix potential race condition in padata.
   - Use unbound workqueues in padata"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (311 commits)
  crypto: caam - Cast to long first before pointer conversion
  crypto: ccree - enable CTS support in AES-XTS
  crypto: inside-secure - Probe transform record cache RAM sizes
  crypto: inside-secure - Base RD fetchcount on actual RD FIFO size
  crypto: inside-secure - Base CD fetchcount on actual CD FIFO size
  crypto: inside-secure - Enable extended algorithms on newer HW
  crypto: inside-secure: Corrected configuration of EIP96_TOKEN_CTRL
  crypto: inside-secure - Add EIP97/EIP197 and endianness detection
  padata: remove cpu_index from the parallel_queue
  padata: unbind parallel jobs from specific CPUs
  padata: use separate workqueues for parallel and serial work
  padata, pcrypt: take CPU hotplug lock internally in padata_alloc_possible
  crypto: pcrypt - remove padata cpumask notifier
  padata: make padata_do_parallel find alternate callback CPU
  workqueue: require CPU hotplug read exclusion for apply_workqueue_attrs
  workqueue: unconfine alloc/apply/free_workqueue_attrs()
  padata: allocate workqueue internally
  arm64: dts: imx8mq: Add CAAM node
  random: Use wait_event_freezable() in add_hwgenerator_randomness()
  crypto: ux500 - Fix COMPILE_TEST warnings
  ...

1 files changed, 28 insertions, 1 deletions

diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index edefa669153f..73acf0fdb793 100644
--- a/drivers/crypto/ccp/ccp-dev.c
+++ b/drivers/crypto/ccp/ccp-dev.c
@@ -2,12 +2,13 @@
 /*
  * AMD Cryptographic Coprocessor (CCP) driver
  *
- * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
+ * Copyright (C) 2013,2019 Advanced Micro Devices, Inc.
  *
  * Author: Tom Lendacky <thomas.lendacky@amd.com>
  * Author: Gary R Hook <gary.hook@amd.com>
  */
 
+#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/kthread.h>
 #include <linux/sched.h>
@@ -19,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/hw_random.h>
 #include <linux/cpu.h>
+#include <linux/atomic.h>
 #ifdef CONFIG_X86
 #include <asm/cpu_device_id.h>
 #endif
@@ -26,6 +28,19 @@
 
 #include "ccp-dev.h"
 
+#define MAX_CCPS 32
+
+/* Limit CCP use to a specifed number of queues per device */
+static unsigned int nqueues = 0;
+module_param(nqueues, uint, 0444);
+MODULE_PARM_DESC(nqueues, "Number of queues per CCP (minimum 1; default: all available)");
+
+/* Limit the maximum number of configured CCPs */
+static atomic_t dev_count = ATOMIC_INIT(0);
+static unsigned int max_devs = MAX_CCPS;
+module_param(max_devs, uint, 0444);
+MODULE_PARM_DESC(max_devs, "Maximum number of CCPs to enable (default: all; 0 disables all CCPs)");
+
 struct ccp_tasklet_data {
 	struct completion completion;
 	struct ccp_cmd *cmd;
@@ -594,12 +609,24 @@ int ccp_dev_init(struct sp_device *sp)
 	struct ccp_device *ccp;
 	int ret;
 
+	/*
+	 * Check how many we have so far, and stop after reaching
+	 * that number
+	 */
+	if (atomic_inc_return(&dev_count) > max_devs)
+		return 0; /* don't fail the load */
+
 	ret = -ENOMEM;
 	ccp = ccp_alloc_struct(sp);
 	if (!ccp)
 		goto e_err;
 	sp->ccp_data = ccp;
 
+	if (!nqueues || (nqueues > MAX_HW_QUEUES))
+		ccp->max_q_count = MAX_HW_QUEUES;
+	else
+		ccp->max_q_count = nqueues;
+
 	ccp->vdata = (struct ccp_vdata *)sp->dev_vdata->ccp_vdata;
 	if (!ccp->vdata || !ccp->vdata->version) {
 		ret = -ENODEV;