Quelle intel_huc.c
Sprache: C
// SPDX-License-Identifier: MIT
/*
* Copyright © 2016 - 2019 Intel Corporation
*/
#include <linux/types.h>
#include "gt/intel_gt.h"
#include "gt/intel_rps.h"
#include "intel_guc_reg.h"
#include "intel_huc.h"
#include "intel_huc_print.h"
#include "i915_drv.h"
#include "i915_reg.h"
#include "pxp/intel_pxp_cmd_interface_43.h"
#include <linux/device/bus.h>
#include <linux/mei_aux.h>
/**
* DOC : HuC
*
* The HuC is a dedicated microcontroller for usage in media HEVC ( High
* Efficiency Video Coding ) operations . Userspace can directly use the firmware
* capabilities by adding HuC specific commands to batch buffers .
*
* The kernel driver is only responsible for loading the HuC firmware and
* triggering its security authentication . This is done differently depending
* on the platform :
*
* - older platforms ( from Gen9 to most Gen12s ) : the load is performed via DMA
* and the authentication via GuC
* - DG2 : load and authentication are both performed via GSC .
* - MTL and newer platforms : the load is performed via DMA ( same as with
* not - DG2 older platforms ) , while the authentication is done in 2 - steps ,
* a first auth for clear - media workloads via GuC and a second one for all
* workloads via GSC .
*
* On platforms where the GuC does the authentication , to correctly do so the
* HuC binary must be loaded before the GuC one .
* Loading the HuC is optional ; however , not using the HuC might negatively
* impact power usage and / or performance of media workloads , depending on the
* use - cases .
* HuC must be reloaded on events that cause the WOPCM to lose its contents
* ( S3 / S4 , FLR ) ; on older platforms the HuC must also be reloaded on GuC / GT
* reset , while on newer ones it will survive that .
*
* See https : //github.com/intel/media-driver for the latest details on HuC
* functionality .
*/
/**
* DOC : HuC Memory Management
*
* Similarly to the GuC , the HuC can ' t do any memory allocations on its own ,
* with the difference being that the allocations for HuC usage are handled by
* the userspace driver instead of the kernel one . The HuC accesses the memory
* via the PPGTT belonging to the context loaded on the VCS executing the
* HuC - specific commands .
*/
/*
* MEI - GSC load is an async process . The probing of the exposed aux device
* ( see intel_gsc . c ) usually happens a few seconds after i915 probe , depending
* on when the kernel schedules it . Unless something goes terribly wrong , we ' re
* guaranteed for this to happen during boot , so the big timeout is a safety net
* that we never expect to need .
* MEI - PXP + HuC load usually takes ~ 300 ms , but if the GSC needs to be resumed
* and / or reset , this can take longer . Note that the kernel might schedule
* other work between the i915 init / resume and the MEI one , which can add to
* the delay .
*/
#define GSC_INIT_TIMEOUT_MS 10000
#define PXP_INIT_TIMEOUT_MS 5000
static int sw_fence_dummy_notify(struct i915_sw_fence *sf,
enum i915_sw_fence_notify state)
{
return NOTIFY_DONE;
}
static void __delayed_huc_load_complete(struct intel_huc *huc)
{
if (!i915_sw_fence_done(&huc->delayed_load.fence))
i915_sw_fence_complete(&huc->delayed_load.fence);
}
static void delayed_huc_load_complete(struct intel_huc *huc)
{
hrtimer_cancel(&huc->delayed_load.timer);
__delayed_huc_load_complete(huc);
}
static void __gsc_init_error(struct intel_huc *huc)
{
huc->delayed_load.status = INTEL_HUC_DELAYED_LOAD_ERROR;
__delayed_huc_load_complete(huc);
}
static void gsc_init_error(struct intel_huc *huc)
{
hrtimer_cancel(&huc->delayed_load.timer);
__gsc_init_error(huc);
}
static void gsc_init_done(struct intel_huc *huc)
{
hrtimer_cancel(&huc->delayed_load.timer);
/* MEI-GSC init is done, now we wait for MEI-PXP to bind */
huc->delayed_load.status = INTEL_HUC_WAITING_ON_PXP;
if (!i915_sw_fence_done(&huc->delayed_load.fence))
hrtimer_start(&huc->delayed_load.timer,
ms_to_ktime(PXP_INIT_TIMEOUT_MS),
HRTIMER_MODE_REL);
}
static enum hrtimer_restart huc_delayed_load_timer_callback(struct hrtimer *hrtimer)
{
struct intel_huc *huc = container_of(hrtimer, struct intel_huc, delayed_load.timer);
if (!intel_huc_is_authenticated(huc, INTEL_HUC_AUTH_BY_GSC)) {
if (huc->delayed_load.status == INTEL_HUC_WAITING_ON_GSC)
huc_notice(huc, "timed out waiting for MEI GSC\n" );
else if (huc->delayed_load.status == INTEL_HUC_WAITING_ON_PXP)
huc_notice(huc, "timed out waiting for MEI PXP\n" );
else
MISSING_CASE(huc->delayed_load.status);
__gsc_init_error(huc);
}
return HRTIMER_NORESTART;
}
static void huc_delayed_load_start(struct intel_huc *huc)
{
ktime_t delay;
GEM_BUG_ON(intel_huc_is_authenticated(huc, INTEL_HUC_AUTH_BY_GSC));
/*
* On resume we don ' t have to wait for MEI - GSC to be re - probed , but we
* do need to wait for MEI - PXP to reset & re - bind
*/
switch (huc->delayed_load.status) {
case INTEL_HUC_WAITING_ON_GSC:
delay = ms_to_ktime(GSC_INIT_TIMEOUT_MS);
break ;
case INTEL_HUC_WAITING_ON_PXP:
delay = ms_to_ktime(PXP_INIT_TIMEOUT_MS);
break ;
default :
gsc_init_error(huc);
return ;
}
/*
* This fence is always complete unless we ' re waiting for the
* GSC device to come up to load the HuC . We arm the fence here
* and complete it when we confirm that the HuC is loaded from
* the PXP bind callback .
*/
GEM_BUG_ON(!i915_sw_fence_done(&huc->delayed_load.fence));
i915_sw_fence_fini(&huc->delayed_load.fence);
i915_sw_fence_reinit(&huc->delayed_load.fence);
i915_sw_fence_await(&huc->delayed_load.fence);
i915_sw_fence_commit(&huc->delayed_load.fence);
hrtimer_start(&huc->delayed_load.timer, delay, HRTIMER_MODE_REL);
}
static int gsc_notifier(struct notifier_block *nb, unsigned long action, void *data)
{
struct device *dev = data;
struct intel_huc *huc = container_of(nb, struct intel_huc, delayed_load.nb);
struct intel_gsc_intf *intf = &huc_to_gt(huc)->gsc.intf[0 ];
if (!intf->adev || &intf->adev->aux_dev.dev != dev)
return 0 ;
switch (action) {
case BUS_NOTIFY_BOUND_DRIVER: /* mei driver bound to aux device */
gsc_init_done(huc);
break ;
case BUS_NOTIFY_DRIVER_NOT_BOUND: /* mei driver fails to be bound */
case BUS_NOTIFY_UNBIND_DRIVER: /* mei driver about to be unbound */
huc_info(huc, "MEI driver not bound, disabling load\n" );
gsc_init_error(huc);
break ;
}
return 0 ;
}
void intel_huc_register_gsc_notifier(struct intel_huc *huc, const struct bus_type *bus)
{
int ret;
if (!intel_huc_is_loaded_by_gsc(huc))
return ;
huc->delayed_load.nb.notifier_call = gsc_notifier;
ret = bus_register_notifier(bus, &huc->delayed_load.nb);
if (ret) {
huc_err(huc, "failed to register GSC notifier %pe\n" , ERR_PTR(ret));
huc->delayed_load.nb.notifier_call = NULL;
gsc_init_error(huc);
}
}
void intel_huc_unregister_gsc_notifier(struct intel_huc *huc, const struct bus_type *bus)
{
if (!huc->delayed_load.nb.notifier_call)
return ;
delayed_huc_load_complete(huc);
bus_unregister_notifier(bus, &huc->delayed_load.nb);
huc->delayed_load.nb.notifier_call = NULL;
}
static void delayed_huc_load_init(struct intel_huc *huc)
{
/*
* Initialize fence to be complete as this is expected to be complete
* unless there is a delayed HuC load in progress .
*/
i915_sw_fence_init(&huc->delayed_load.fence,
sw_fence_dummy_notify);
i915_sw_fence_commit(&huc->delayed_load.fence);
hrtimer_setup(&huc->delayed_load.timer, huc_delayed_load_timer_callback, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
}
static void delayed_huc_load_fini(struct intel_huc *huc)
{
/*
* the fence is initialized in init_early , so we need to clean it up
* even if HuC loading is off .
*/
delayed_huc_load_complete(huc);
i915_sw_fence_fini(&huc->delayed_load.fence);
}
int intel_huc_sanitize(struct intel_huc *huc)
{
delayed_huc_load_complete(huc);
intel_uc_fw_sanitize(&huc->fw);
return 0 ;
}
static bool vcs_supported(struct intel_gt *gt)
{
intel_engine_mask_t mask = gt->info.engine_mask;
/*
* We reach here from i915_driver_early_probe for the primary GT before
* its engine mask is set , so we use the device info engine mask for it ;
* this means we ' re not taking VCS fusing into account , but if the
* primary GT supports VCS engines we expect at least one of them to
* remain unfused so we ' re fine .
* For other GTs we expect the GT - specific mask to be set before we
* call this function .
*/
GEM_BUG_ON(!gt_is_root(gt) && !gt->info.engine_mask);
if (gt_is_root(gt))
mask = INTEL_INFO(gt->i915)->platform_engine_mask;
else
mask = gt->info.engine_mask;
return __ENGINE_INSTANCES_MASK(mask, VCS0, I915_MAX_VCS);
}
void intel_huc_init_early(struct intel_huc *huc)
{
struct drm_i915_private *i915 = huc_to_gt(huc)->i915;
struct intel_gt *gt = huc_to_gt(huc);
intel_uc_fw_init_early(&huc->fw, INTEL_UC_FW_TYPE_HUC, true );
/*
* we always init the fence as already completed , even if HuC is not
* supported . This way we don ' t have to distinguish between HuC not
* supported / disabled or already loaded , and can focus on if the load
* is currently in progress ( fence not complete ) or not , which is what
* we care about for stalling userspace submissions .
*/
delayed_huc_load_init(huc);
if (!vcs_supported(gt)) {
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_NOT_SUPPORTED);
return ;
}
if (GRAPHICS_VER(i915) >= 11 ) {
huc->status[INTEL_HUC_AUTH_BY_GUC].reg = GEN11_HUC_KERNEL_LOAD_INFO;
huc->status[INTEL_HUC_AUTH_BY_GUC].mask = HUC_LOAD_SUCCESSFUL;
huc->status[INTEL_HUC_AUTH_BY_GUC].value = HUC_LOAD_SUCCESSFUL;
} else {
huc->status[INTEL_HUC_AUTH_BY_GUC].reg = HUC_STATUS2;
huc->status[INTEL_HUC_AUTH_BY_GUC].mask = HUC_FW_VERIFIED;
huc->status[INTEL_HUC_AUTH_BY_GUC].value = HUC_FW_VERIFIED;
}
if (IS_DG2(i915)) {
huc->status[INTEL_HUC_AUTH_BY_GSC].reg = GEN11_HUC_KERNEL_LOAD_INFO;
huc->status[INTEL_HUC_AUTH_BY_GSC].mask = HUC_LOAD_SUCCESSFUL;
huc->status[INTEL_HUC_AUTH_BY_GSC].value = HUC_LOAD_SUCCESSFUL;
} else {
huc->status[INTEL_HUC_AUTH_BY_GSC].reg = HECI_FWSTS(MTL_GSC_HECI1_BASE, 5 );
huc->status[INTEL_HUC_AUTH_BY_GSC].mask = HECI1_FWSTS5_HUC_AUTH_DONE;
huc->status[INTEL_HUC_AUTH_BY_GSC].value = HECI1_FWSTS5_HUC_AUTH_DONE;
}
}
void intel_huc_fini_late(struct intel_huc *huc)
{
delayed_huc_load_fini(huc);
}
#define HUC_LOAD_MODE_STRING(x) (x ? "GSC" : "legacy" )
static int check_huc_loading_mode(struct intel_huc *huc)
{
struct intel_gt *gt = huc_to_gt(huc);
bool gsc_enabled = huc->fw.has_gsc_headers;
/*
* The fuse for HuC load via GSC is only valid on platforms that have
* GuC deprivilege .
*/
if (HAS_GUC_DEPRIVILEGE(gt->i915))
huc->loaded_via_gsc = intel_uncore_read(gt->uncore, GUC_SHIM_CONTROL2) &
GSC_LOADS_HUC;
if (huc->loaded_via_gsc && !gsc_enabled) {
huc_err(huc, "HW requires a GSC-enabled blob, but we found a legacy one\n" );
return -ENOEXEC;
}
/*
* On newer platforms we have GSC - enabled binaries but we load the HuC
* via DMA . To do so we need to find the location of the legacy - style
* binary inside the GSC - enabled one , which we do at fetch time . Make
* sure that we were able to do so if the fuse says we need to load via
* DMA and the binary is GSC - enabled .
*/
if (!huc->loaded_via_gsc && gsc_enabled && !huc->fw.dma_start_offset) {
huc_err(huc, "HW in DMA mode, but we have an incompatible GSC-enabled blob\n" );
return -ENOEXEC;
}
/*
* If the HuC is loaded via GSC , we need to be able to access the GSC .
* On DG2 this is done via the mei components , while on newer platforms
* it is done via the GSCCS ,
*/
if (huc->loaded_via_gsc) {
if (IS_DG2(gt->i915)) {
if (!IS_ENABLED(CONFIG_INTEL_MEI_PXP) ||
!IS_ENABLED(CONFIG_INTEL_MEI_GSC)) {
huc_info(huc, "can't load due to missing mei modules\n" );
return -EIO;
}
} else {
if (!HAS_ENGINE(gt, GSC0)) {
huc_info(huc, "can't load due to missing GSCCS\n" );
return -EIO;
}
}
}
huc_dbg(huc, "loaded by GSC = %s\n" , str_yes_no(huc->loaded_via_gsc));
return 0 ;
}
int intel_huc_init(struct intel_huc *huc)
{
struct intel_gt *gt = huc_to_gt(huc);
int err;
err = check_huc_loading_mode(huc);
if (err)
goto out;
if (HAS_ENGINE(gt, GSC0)) {
struct i915_vma *vma;
vma = intel_guc_allocate_vma(gt_to_guc(gt), PXP43_HUC_AUTH_INOUT_SIZE * 2 );
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
huc_info(huc, "Failed to allocate heci pkt\n" );
goto out;
}
huc->heci_pkt = vma;
}
err = intel_uc_fw_init(&huc->fw);
if (err)
goto out_pkt;
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_LOADABLE);
return 0 ;
out_pkt:
if (huc->heci_pkt)
i915_vma_unpin_and_release(&huc->heci_pkt, 0 );
out:
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_INIT_FAIL);
huc_info(huc, "initialization failed %pe\n" , ERR_PTR(err));
return err;
}
void intel_huc_fini(struct intel_huc *huc)
{
if (huc->heci_pkt)
i915_vma_unpin_and_release(&huc->heci_pkt, 0 );
if (intel_uc_fw_is_loadable(&huc->fw))
intel_uc_fw_fini(&huc->fw);
}
static const char *auth_mode_string(struct intel_huc *huc,
enum intel_huc_authentication_type type)
{
bool partial = huc->fw.has_gsc_headers && type == INTEL_HUC_AUTH_BY_GUC;
return partial ? "clear media" : "all workloads" ;
}
/*
* Use a longer timeout for debug builds so that problems can be detected
* and analysed . But a shorter timeout for releases so that user ' s don ' t
* wait forever to find out there is a problem . Note that the only reason
* an end user should hit the timeout is in case of extreme thermal throttling .
* And a system that is that hot during boot is probably dead anyway !
*/
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)
#define HUC_LOAD_RETRY_LIMIT 20
#else
#define HUC_LOAD_RETRY_LIMIT 3
#endif
int intel_huc_wait_for_auth_complete(struct intel_huc *huc,
enum intel_huc_authentication_type type)
{
struct intel_gt *gt = huc_to_gt(huc);
struct intel_uncore *uncore = gt->uncore;
ktime_t before, after, delta;
int ret, count;
u64 delta_ms;
u32 before_freq;
/*
* The KMD requests maximum frequency during driver load , however thermal
* throttling can force the frequency down to minimum ( although the board
* really should never get that hot in real life ! ) . IFWI issues have been
* seen to cause sporadic failures to grant the higher frequency . And at
* minimum frequency , the authentication time can be in the seconds range .
* Note that there is a limit on how long an individual wait_for ( ) can wait .
* So wrap it in a loop .
*/
before_freq = intel_rps_read_actual_frequency(>->rps);
before = ktime_get();
for (count = 0 ; count < HUC_LOAD_RETRY_LIMIT; count++) {
ret = __intel_wait_for_register(gt->uncore,
huc->status[type].reg,
huc->status[type].mask,
huc->status[type].value,
2 , 1000 , NULL);
if (!ret)
break ;
huc_dbg(huc, "auth still in progress, count = %d, freq = %dMHz, status = 0x%08X\n" ,
count, intel_rps_read_actual_frequency(>->rps),
huc->status[type].reg.reg);
}
after = ktime_get();
delta = ktime_sub(after, before);
delta_ms = ktime_to_ms(delta);
if (delta_ms > 50 ) {
huc_warn(huc, "excessive auth time: %lldms! [status = 0x%08X, count = %d, ret = %d]\n" ,
delta_ms, huc->status[type].reg.reg, count, ret);
huc_warn(huc, "excessive auth time: [freq = %dMHz -> %dMHz vs %dMHz, perf_limit_reasons = 0x%08X]\n" ,
before_freq, intel_rps_read_actual_frequency(>->rps),
intel_rps_get_requested_frequency(>->rps),
intel_uncore_read(uncore, intel_gt_perf_limit_reasons_reg(gt)));
} else {
huc_dbg(huc, "auth took %lldms, freq = %dMHz -> %dMHz vs %dMHz, status = 0x%08X, count = %d, ret = %d\n" ,
delta_ms, before_freq, intel_rps_read_actual_frequency(>->rps),
intel_rps_get_requested_frequency(>->rps),
huc->status[type].reg.reg, count, ret);
}
/* mark the load process as complete even if the wait failed */
delayed_huc_load_complete(huc);
if (ret) {
huc_err(huc, "firmware not verified for %s: %pe\n" ,
auth_mode_string(huc, type), ERR_PTR(ret));
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_LOAD_FAIL);
return ret;
}
intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_RUNNING);
huc_info(huc, "authenticated for %s\n" , auth_mode_string(huc, type));
return 0 ;
}
/**
* intel_huc_auth ( ) - Authenticate HuC uCode
* @ huc : intel_huc structure
* @ type : authentication type ( via GuC or via GSC )
*
* Called after HuC and GuC firmware loading during intel_uc_init_hw ( ) .
*
* This function invokes the GuC action to authenticate the HuC firmware ,
* passing the offset of the RSA signature to intel_guc_auth_huc ( ) . It then
* waits for up to 50 ms for firmware verification ACK .
*/
int intel_huc_auth(struct intel_huc *huc, enum intel_huc_authentication_type type)
{
struct intel_gt *gt = huc_to_gt(huc);
struct intel_guc *guc = gt_to_guc(gt);
int ret;
if (!intel_uc_fw_is_loaded(&huc->fw))
return -ENOEXEC;
/* GSC will do the auth with the load */
if (intel_huc_is_loaded_by_gsc(huc))
return -ENODEV;
if (intel_huc_is_authenticated(huc, type))
return -EEXIST;
ret = i915_inject_probe_error(gt->i915, -ENXIO);
if (ret)
goto fail;
switch (type) {
case INTEL_HUC_AUTH_BY_GUC:
ret = intel_guc_auth_huc(guc, intel_guc_ggtt_offset(guc, huc->fw.rsa_data));
break ;
case INTEL_HUC_AUTH_BY_GSC:
ret = intel_huc_fw_auth_via_gsccs(huc);
break ;
default :
MISSING_CASE(type);
ret = -EINVAL;
}
if (ret)
goto fail;
/* Check authentication status, it should be done by now */
ret = intel_huc_wait_for_auth_complete(huc, type);
if (ret)
goto fail;
return 0 ;
fail:
huc_probe_error(huc, "%s authentication failed %pe\n" ,
auth_mode_string(huc, type), ERR_PTR(ret));
return ret;
}
bool intel_huc_is_authenticated(struct intel_huc *huc,
enum intel_huc_authentication_type type)
{
struct intel_gt *gt = huc_to_gt(huc);
intel_wakeref_t wakeref;
u32 status = 0 ;
with_intel_runtime_pm(gt->uncore->rpm, wakeref)
status = intel_uncore_read(gt->uncore, huc->status[type].reg);
return (status & huc->status[type].mask) == huc->status[type].value;
}
static bool huc_is_fully_authenticated(struct intel_huc *huc)
{
struct intel_uc_fw *huc_fw = &huc->fw;
if (!huc_fw->has_gsc_headers)
return intel_huc_is_authenticated(huc, INTEL_HUC_AUTH_BY_GUC);
else if (intel_huc_is_loaded_by_gsc(huc) || HAS_ENGINE(huc_to_gt(huc), GSC0))
return intel_huc_is_authenticated(huc, INTEL_HUC_AUTH_BY_GSC);
else
return false ;
}
/**
* intel_huc_check_status ( ) - check HuC status
* @ huc : intel_huc structure
*
* This function reads status register to verify if HuC
* firmware was successfully loaded .
*
* The return values match what is expected for the I915_PARAM_HUC_STATUS
* getparam .
*/
int intel_huc_check_status(struct intel_huc *huc)
{
struct intel_uc_fw *huc_fw = &huc->fw;
switch (__intel_uc_fw_status(huc_fw)) {
case INTEL_UC_FIRMWARE_NOT_SUPPORTED:
return -ENODEV;
case INTEL_UC_FIRMWARE_DISABLED:
return -EOPNOTSUPP;
case INTEL_UC_FIRMWARE_MISSING:
return -ENOPKG;
case INTEL_UC_FIRMWARE_ERROR:
return -ENOEXEC;
case INTEL_UC_FIRMWARE_INIT_FAIL:
return -ENOMEM;
case INTEL_UC_FIRMWARE_LOAD_FAIL:
return -EIO;
default :
break ;
}
/*
* GSC - enabled binaries loaded via DMA are first partially
* authenticated by GuC and then fully authenticated by GSC
*/
if (huc_is_fully_authenticated(huc))
return 1 ; /* full auth */
else if (huc_fw->has_gsc_headers && !intel_huc_is_loaded_by_gsc(huc) &&
intel_huc_is_authenticated(huc, INTEL_HUC_AUTH_BY_GUC))
return 2 ; /* clear media only */
else
return 0 ;
}
static bool huc_has_delayed_load(struct intel_huc *huc)
{
return intel_huc_is_loaded_by_gsc(huc) &&
(huc->delayed_load.status != INTEL_HUC_DELAYED_LOAD_ERROR);
}
void intel_huc_update_auth_status(struct intel_huc *huc)
{
if (!intel_uc_fw_is_loadable(&huc->fw))
return ;
if (!huc->fw.has_gsc_headers)
return ;
if (huc_is_fully_authenticated(huc))
intel_uc_fw_change_status(&huc->fw,
INTEL_UC_FIRMWARE_RUNNING);
else if (huc_has_delayed_load(huc))
huc_delayed_load_start(huc);
}
/**
* intel_huc_load_status - dump information about HuC load status
* @ huc : the HuC
* @ p : the & drm_printer
*
* Pretty printer for HuC load status .
*/
void intel_huc_load_status(struct intel_huc *huc, struct drm_printer *p)
{
struct intel_gt *gt = huc_to_gt(huc);
intel_wakeref_t wakeref;
if (!intel_huc_is_supported(huc)) {
drm_printf(p, "HuC not supported\n" );
return ;
}
if (!intel_huc_is_wanted(huc)) {
drm_printf(p, "HuC disabled\n" );
return ;
}
intel_uc_fw_dump(&huc->fw, p);
with_intel_runtime_pm(gt->uncore->rpm, wakeref)
drm_printf(p, "HuC status: 0x%08x\n" ,
intel_uncore_read(gt->uncore, huc->status[INTEL_HUC_AUTH_BY_GUC].reg));
}
Messung V0.5 in Prozent C=95 H=96 G=95
¤ Dauer der Verarbeitung: 0.30 Sekunden
¤
*© Formatika GbR, Deutschland
2026-10-11
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