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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/include/asm/irq_remapping.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/include/asm/irq_remapping.h')
-rw-r--r--arch/x86/include/asm/irq_remapping.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
new file mode 100644
index 000000000..7cc494321
--- /dev/null
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Advanced Micro Devices, Inc.
+ * Author: Joerg Roedel <joerg.roedel@amd.com>
+ *
+ * This header file contains the interface of the interrupt remapping code to
+ * the x86 interrupt management code.
+ */
+
+#ifndef __X86_IRQ_REMAPPING_H
+#define __X86_IRQ_REMAPPING_H
+
+#include <asm/irqdomain.h>
+#include <asm/hw_irq.h>
+#include <asm/io_apic.h>
+
+struct msi_msg;
+struct irq_alloc_info;
+
+enum irq_remap_cap {
+ IRQ_POSTING_CAP = 0,
+};
+
+enum {
+ IRQ_REMAP_XAPIC_MODE,
+ IRQ_REMAP_X2APIC_MODE,
+};
+
+struct vcpu_data {
+ u64 pi_desc_addr; /* Physical address of PI Descriptor */
+ u32 vector; /* Guest vector of the interrupt */
+};
+
+#ifdef CONFIG_IRQ_REMAP
+
+extern raw_spinlock_t irq_2_ir_lock;
+
+extern bool irq_remapping_cap(enum irq_remap_cap cap);
+extern void set_irq_remapping_broken(void);
+extern int irq_remapping_prepare(void);
+extern int irq_remapping_enable(void);
+extern void irq_remapping_disable(void);
+extern int irq_remapping_reenable(int);
+extern int irq_remap_enable_fault_handling(void);
+extern void panic_if_irq_remap(const char *msg);
+
+/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
+extern struct irq_domain *
+arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
+
+/* Get parent irqdomain for interrupt remapping irqdomain */
+static inline struct irq_domain *arch_get_ir_parent_domain(void)
+{
+ return x86_vector_domain;
+}
+
+#else /* CONFIG_IRQ_REMAP */
+
+static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
+static inline void set_irq_remapping_broken(void) { }
+static inline int irq_remapping_prepare(void) { return -ENODEV; }
+static inline int irq_remapping_enable(void) { return -ENODEV; }
+static inline void irq_remapping_disable(void) { }
+static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
+static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
+
+static inline void panic_if_irq_remap(const char *msg)
+{
+}
+
+#endif /* CONFIG_IRQ_REMAP */
+#endif /* __X86_IRQ_REMAPPING_H */