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Examples: > + * Currently this is implemented only for post and mid context restore. > + * Examples: > * > - * #. Execute a LRI command to write 0xDEADBEEF to register 0x4f10:: > + * #. Execute a LRI command to write 0xDEADBEEF to register 0x4f10 after the > + * normal context restore:: > * > * # echo 'rcs cmd 11000001 4F100 DEADBEEF' \ > * > /sys/kernel/config/xe/0000:03:00.0/ctx_restore_post_bb > * > + * #. Execute a LRI command to write 0xDEADBEEF to register 0x4f10 at the > + * beginning of the context restore:: > + * > + * # echo 'rcs cmd 11000001 4F100 DEADBEEF' \ > + * > /sys/kernel/config/xe/0000:03:00.0/ctx_restore_mid_bb > + > * #. Load certain values in a couple of registers (it can be used as a simpler > * alternative to the `cmd`) action:: > * > @@ -146,7 +154,7 @@ > * When using multiple lines, make sure to use a command that is > * implemented with a single write syscall, like HEREDOC. > * > - * This attribute can only be set before binding to the device. > + * These attributes can only be set before binding to the device. > * > * Remove devices > * ============== > @@ -168,6 +176,7 @@ struct xe_config_group_device { > struct xe_config_device { > u64 engines_allowed; > struct wa_bb ctx_restore_post_bb[XE_ENGINE_CLASS_MAX]; > + struct wa_bb ctx_restore_mid_bb[XE_ENGINE_CLASS_MAX]; > bool survivability_mode; > bool enable_psmi; > } config; > @@ -467,6 +476,13 @@ static ssize_t wa_bb_show(struct xe_config_group_device *dev, > return p - data; > } > > +static ssize_t ctx_restore_mid_bb_show(struct config_item *item, char *page) > +{ > + struct xe_config_group_device *dev = to_xe_config_group_device(item); > + > + return wa_bb_show(dev, dev->config.ctx_restore_mid_bb, page, SZ_4K); > +} > + > static ssize_t ctx_restore_post_bb_show(struct config_item *item, char *page) > { > struct xe_config_group_device *dev = to_xe_config_group_device(item); > @@ -623,6 +639,14 @@ static ssize_t wa_bb_store(struct wa_bb wa_bb[static XE_ENGINE_CLASS_MAX], > return len; > } > > +static ssize_t ctx_restore_mid_bb_store(struct config_item *item, > + const char *data, size_t sz) > +{ > + struct xe_config_group_device *dev = to_xe_config_group_device(item); > + > + return wa_bb_store(dev->config.ctx_restore_mid_bb, dev, data, sz); > +} > + > static ssize_t ctx_restore_post_bb_store(struct config_item *item, > const char *data, size_t sz) > { > @@ -631,12 +655,14 @@ static ssize_t ctx_restore_post_bb_store(struct config_item *item, > return wa_bb_store(dev->config.ctx_restore_post_bb, dev, data, sz); > } > > +CONFIGFS_ATTR(, ctx_restore_mid_bb); > CONFIGFS_ATTR(, ctx_restore_post_bb); > CONFIGFS_ATTR(, enable_psmi); > CONFIGFS_ATTR(, engines_allowed); > CONFIGFS_ATTR(, survivability_mode); > > static struct configfs_attribute *xe_config_device_attrs[] = { > + &attr_ctx_restore_mid_bb, > &attr_ctx_restore_post_bb, > &attr_enable_psmi, > &attr_engines_allowed, > @@ -909,7 +935,19 @@ u32 xe_configfs_get_ctx_restore_mid_bb(struct pci_dev *pdev, > enum xe_engine_class class, > const u32 **cs) > { > - return 0; > + struct xe_config_group_device *dev = find_xe_config_group_device(pdev); > + u32 len; > + > + if (!dev) > + return 0; > + > + if (cs) > + *cs = dev->config.ctx_restore_mid_bb[class].cs; > + > + len = dev->config.ctx_restore_mid_bb[class].len; > + config_group_put(&dev->group); > + > + return len; > } > > /** > > -- > 2.50.1 >