/*
* Copyright 2013 Red Hat
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef QXL_DRM_H
#define QXL_DRM_H
#include "drm.h"
#if defined(__cplusplus)
extern "C" {
#endif
/* Please note that modifications to all structs defined here are
* subject to backwards-compatibility constraints.
*
* Do not use pointers, use __u64 instead for 32 bit / 64 bit user/kernel
* compatibility Keep fields aligned to their size
*/
#define QXL_GEM_DOMAIN_CPU 0
#define QXL_GEM_DOMAIN_VRAM 1
#define QXL_GEM_DOMAIN_SURFACE 2
#define DRM_QXL_ALLOC 0x00
#define DRM_QXL_MAP 0x01
#define DRM_QXL_EXECBUFFER 0x02
#define DRM_QXL_UPDATE_AREA 0x03
#define DRM_QXL_GETPARAM 0x04
#define DRM_QXL_CLIENTCAP 0x05
#define DRM_QXL_ALLOC_SURF 0x06
struct drm_qxl_alloc {
__u32 size;
__u32 handle; /* 0 is an invalid handle */
};
struct drm_qxl_map {
__u64 offset; /* use for mmap system call */
__u32 handle;
__u32 pad;
};
/*
* dest is the bo we are writing the relocation into
* src is bo we are relocating.
* *(dest_handle.base_addr + dest_offset) = physical_address(src_handle.addr +
* src_offset)
*/
#define QXL_RELOC_TYPE_BO 1
#define QXL_RELOC_TYPE_SURF 2
struct drm_qxl_reloc {
__u64 src_offset; /* offset into src_handle or src buffer */
__u64 dst_offset; /* offset in dest handle */
__u32 src_handle; /* dest handle to compute address from */
__u32 dst_handle; /* 0 if to command buffer */
__u32 reloc_type;
__u32 pad;
};
struct drm_qxl_command {
__u64 __user command; /* void* */
__u64 __user relocs; /* struct drm_qxl_reloc* */
__u32 type;
__u32 command_size;
__u32 relocs_num;
__u32 pad;
};
struct drm_qxl_execbuffer {
__u32 flags; /* for future use */
__u32 commands_num;
__u64 __user commands; /* struct drm_qxl_command* */
};
struct drm_qxl_update_area {
__u32 handle;
__u32 top;
__u32 left;
__u32 bottom;
__u32 right;
__u32 pad;
};
#define QXL_PARAM_NUM_SURFACES 1 /* rom->n_surfaces */
#define QXL_PARAM_MAX_RELOCS 2
struct drm_qxl_getparam {
__u64 param;
__u64 value;
};
/* these are one bit values */
struct drm_qxl_clientcap {
__u32 index;
__u32 pad;
};
struct drm_qxl_alloc_surf {
__u32 format;
__u32 width;
__u32 height;
__s32 stride;
__u32 handle;
__u32 pad;
};
#define DRM_IOCTL_QXL_ALLOC \
DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_ALLOC, struct drm_qxl_alloc)
#define DRM_IOCTL_QXL_MAP \
DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_MAP, struct drm_qxl_map)
#define DRM_IOCTL_QXL_EXECBUFFER \
DRM_IOW(DRM_COMMAND_BASE + DRM_QXL_EXECBUFFER,\
struct drm_qxl_execbuffer)
#define DRM_IOCTL_QXL_UPDATE_AREA \
DRM_IOW(DRM_COMMAND_BASE + DRM_QXL_UPDATE_AREA,\
struct drm_qxl_update_area)
#define DRM_IOCTL_QXL_GETPARAM \
DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_GETPARAM,\
struct drm_qxl_getparam)
#define DRM_IOCTL_QXL_CLIENTCAP \
DRM_IOW(DRM_COMMAND_BASE + DRM_QXL_CLIENTCAP,\
struct drm_qxl_clientcap)
#define DRM_IOCTL_QXL_ALLOC_SURF \
DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_ALLOC_SURF,\
struct drm_qxl_alloc_surf)
#if defined(__cplusplus)
}
#endif
#endif
>
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in
HWP mode, even if running under sustained 100% utilization.
This occurs when the HWP.EPP (Energy Performance Preference) is set to
"balance_power" (0x80) -- the default on most systems.
It occurs because the platform BIOS may erroneously enable an
energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not
recommended to be enabled on this SKU.
On the failing systems, this BIOS issue was not discovered when the
desktop motherboard was tested with Windows, because the BIOS also
neglects to provide the ACPI/CPPC table, that Windows requires to enable
HWP, and so Windows runs in legacy P-state mode, where this setting has
no effect.
Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and
so it runs in HWP mode, exposing this incorrect BIOS configuration.
There are several ways to address this problem.
First, Linux can also run in legacy P-state mode on this system.
As intel_pstate is how Linux enables HWP, booting with
"intel_pstate=disable"
will run in acpi-cpufreq/ondemand legacy p-state mode.
Or second, the "performance" governor can be used with intel_pstate,
which will modify HWP.EPP to 0.
Or third, starting in 4.10, the
/sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference
attribute in can be updated from "balance_power" to "performance".
Or fourth, apply this patch, which fixes the erroneous setting of
MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default
configuration to function as designed.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Cc: 4.6+ <stable@vger.kernel.org> # 4.6+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>