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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/linux/dmar.h
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@@ -1,18 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (c) 2006, Intel Corporation.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms and conditions of the GNU General Public License,
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- * version 2, as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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- *
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- * You should have received a copy of the GNU General Public License along with
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- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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- * Place - Suite 330, Boston, MA 02111-1307 USA.
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  *
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  * Copyright (C) Ashok Raj <ashok.raj@intel.com>
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  * Copyright (C) Shaohua Li <shaohua.li@intel.com>
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@@ -39,6 +27,7 @@
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 /* DMAR Flags */
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 #define DMAR_INTR_REMAP		0x1
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 #define DMAR_X2APIC_OPT_OUT	0x2
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+#define DMAR_PLATFORM_OPT_IN	0x4
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 struct intel_iommu;
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@@ -59,6 +48,7 @@
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 	u16	segment;		/* PCI domain		*/
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 	u8	ignored:1; 		/* ignore drhd		*/
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 	u8	include_all:1;
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+	u8	gfx_dedicated:1;	/* graphic dedicated	*/
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 	struct intel_iommu *iommu;
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 };
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@@ -80,19 +70,23 @@
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 extern struct rw_semaphore dmar_global_lock;
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 extern struct list_head dmar_drhd_units;
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-#define for_each_drhd_unit(drhd) \
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-	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
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+#define for_each_drhd_unit(drhd)					\
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+	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list,		\
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+				dmar_rcu_check())
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 #define for_each_active_drhd_unit(drhd)					\
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-	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)		\
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+	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list,		\
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+				dmar_rcu_check())			\
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 		if (drhd->ignored) {} else
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 #define for_each_active_iommu(i, drhd)					\
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-	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)		\
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+	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list,		\
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+				dmar_rcu_check())			\
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 		if (i=drhd->iommu, drhd->ignored) {} else
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 #define for_each_iommu(i, drhd)						\
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-	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)		\
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+	list_for_each_entry_rcu(drhd, &dmar_drhd_units, list,		\
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+				dmar_rcu_check())			\
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 		if (i=drhd->iommu, 0) {} else 
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 static inline bool dmar_rcu_check(void)
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@@ -103,12 +97,14 @@
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 #define	dmar_rcu_dereference(p)	rcu_dereference_check((p), dmar_rcu_check())
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-#define	for_each_dev_scope(a, c, p, d)	\
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-	for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
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-			NULL, (p) < (c)); (p)++)
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+#define for_each_dev_scope(devs, cnt, i, tmp)				\
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+	for ((i) = 0; ((tmp) = (i) < (cnt) ?				\
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+	    dmar_rcu_dereference((devs)[(i)].dev) : NULL, (i) < (cnt)); \
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+	    (i)++)
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-#define	for_each_active_dev_scope(a, c, p, d)	\
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-	for_each_dev_scope((a), (c), (p), (d))	if (!(d)) { continue; } else
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+#define for_each_active_dev_scope(devs, cnt, i, tmp)			\
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+	for_each_dev_scope((devs), (cnt), (i), (tmp))			\
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+		if (!(tmp)) { continue; } else
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 extern int dmar_table_init(void);
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 extern int dmar_dev_scope_init(void);
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@@ -138,6 +134,7 @@
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 #ifdef CONFIG_INTEL_IOMMU
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 extern int iommu_detected, no_iommu;
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 extern int intel_iommu_init(void);
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+extern void intel_iommu_shutdown(void);
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 extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
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 extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
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 extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
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@@ -146,6 +143,7 @@
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 extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
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 #else /* !CONFIG_INTEL_IOMMU: */
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 static inline int intel_iommu_init(void) { return -ENODEV; }
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+static inline void intel_iommu_shutdown(void) { }
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 #define	dmar_parse_one_rmrr		dmar_res_noop
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 #define	dmar_parse_one_atsr		dmar_res_noop
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@@ -170,6 +168,8 @@
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 { return 0; }
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 #endif /* CONFIG_IRQ_REMAP */
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+extern bool dmar_platform_optin(void);
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+
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 #else /* CONFIG_DMAR_TABLE */
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 static inline int dmar_device_add(void *handle)
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@@ -182,6 +182,11 @@
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 	return 0;
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 }
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+static inline bool dmar_platform_optin(void)
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+{
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+	return false;
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+}
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+
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 #endif /* CONFIG_DMAR_TABLE */
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 struct irte {