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Subject[PATCH 42/83] hsa/radeon: 32-bit processes support
Date
From: Alexey Skidanov <Alexey.Skidanov@amd.com>

Initializing compat_ioctl properly. All ioctls args are packed.

Signed-off-by: Alexey Skidanov <Alexey.Skidanov@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
---
drivers/gpu/hsa/radeon/kfd_chardev.c | 7 +++++--
drivers/gpu/hsa/radeon/kfd_priv.h | 4 ++++
include/uapi/linux/kfd_ioctl.h | 2 +-
3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/hsa/radeon/kfd_chardev.c b/drivers/gpu/hsa/radeon/kfd_chardev.c
index 75fe11f..e95d597 100644
--- a/drivers/gpu/hsa/radeon/kfd_chardev.c
+++ b/drivers/gpu/hsa/radeon/kfd_chardev.c
@@ -27,6 +27,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/compat.h>
#include <uapi/linux/kfd_ioctl.h>
#include <linux/time.h>
#include "kfd_priv.h"
@@ -41,6 +42,7 @@ static const char kfd_dev_name[] = "kfd";
static const struct file_operations kfd_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = kfd_ioctl,
+ .compat_ioctl = kfd_ioctl,
.open = kfd_open,
.mmap = kfd_mmap,
};
@@ -105,8 +107,9 @@ kfd_open(struct inode *inode, struct file *filep)
process = radeon_kfd_create_process(current);
if (IS_ERR(process))
return PTR_ERR(process);
-
- pr_debug("\nkfd: process %d opened dev/kfd", process->pasid);
+ process->is_32bit_user_mode = is_compat_task();
+ dev_info(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
+ process->pasid, process->is_32bit_user_mode);

return 0;
}
diff --git a/drivers/gpu/hsa/radeon/kfd_priv.h b/drivers/gpu/hsa/radeon/kfd_priv.h
index 8b877ca..9d3b1fc 100644
--- a/drivers/gpu/hsa/radeon/kfd_priv.h
+++ b/drivers/gpu/hsa/radeon/kfd_priv.h
@@ -194,6 +194,10 @@ struct kfd_process {
size_t queue_array_size;
struct kfd_queue **queues; /* Size is queue_array_size, up to MAX_PROCESS_QUEUES. */
unsigned long allocated_queue_bitmap[DIV_ROUND_UP(MAX_PROCESS_QUEUES, BITS_PER_LONG)];
+
+ /*Is the user space process 32 bit?*/
+ bool is_32bit_user_mode;
+
};

struct kfd_process *radeon_kfd_create_process(const struct task_struct *);
diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
index 5b9517e..a7c3abd 100644
--- a/include/uapi/linux/kfd_ioctl.h
+++ b/include/uapi/linux/kfd_ioctl.h
@@ -29,7 +29,7 @@
#define KFD_IOCTL_CURRENT_VERSION 1

/* The 64-bit ABI is the authoritative version. */
-#pragma pack(push, 8)
+#pragma pack(push, 1)

struct kfd_ioctl_get_version_args {
uint32_t min_supported_version; /* from KFD */
--
1.9.1


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