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drm/amdkfd: Add support for user-mode trap handlers

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A second-level user mode trap handler can be installed. The CWSR trap
handler jumps to the secondary trap handler conditionally for any
conditions not handled by it. This can be used e.g. for debugging or
catching math exceptions.

When CWSR is disabled, the user mode trap handler is installed as
first level trap handler.

Signed-off-by: Shaoyun.liu <shaoyun.liu@amd.com>
Signed-off-by: Jay Cornwall <Jay.Cornwall@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2017-11-14 16:41:20 -05:00 • committed by Oded Gabbay
parent 373d708089
commit d7b9bd2248
4 changed files with 74 additions and 2 deletions
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12
include/uapi/linux/kfd_ioctl.h
View file

@ -262,6 +262,13 @@ struct kfd_ioctl_get_tile_config_args {
*/
};
struct kfd_ioctl_set_trap_handler_args {
uint64_t tba_addr; /* to KFD */
uint64_t tma_addr; /* to KFD */
uint32_t gpu_id; /* to KFD */
uint32_t pad;
};
#define AMDKFD_IOCTL_BASE 'K'
#define AMDKFD_IO(nr) _IO(AMDKFD_IOCTL_BASE, nr)
#define AMDKFD_IOR(nr, type) _IOR(AMDKFD_IOCTL_BASE, nr, type)
@ -322,7 +329,10 @@ struct kfd_ioctl_get_tile_config_args {
#define AMDKFD_IOC_GET_TILE_CONFIG \
AMDKFD_IOWR(0x12, struct kfd_ioctl_get_tile_config_args)
#define AMDKFD_IOC_SET_TRAP_HANDLER \
AMDKFD_IOW(0x13, struct kfd_ioctl_set_trap_handler_args)
#define AMDKFD_COMMAND_START 0x01
#define AMDKFD_COMMAND_END 0x13
#define AMDKFD_COMMAND_END 0x14
#endif