x86/setup: Move UAPI setup structures into setup_data.h

The type definition of struct pci_setup_rom in <asm/pci.h> requires
struct setup_data from <asm/bootparam.h>. Many drivers include
<linux/pci.h>, but do not use boot parameters. Changes to bootparam.h or
its included header files could easily trigger a large, unnecessary
rebuild of the kernel.

Moving struct setup_data and related code into its own header file
avoids including <asm/bootparam.h> in <asm/pci.h>. Instead include the
new header <asm/screen_data.h> and remove the include statement for
x86_init.h, which is unnecessary but pulls in bootparams.h.

Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240112095000.8952-2-tzimmermann@suse.de

1 files changed, 83 insertions, 0 deletions

diff --git a/arch/x86/include/uapi/asm/setup_data.h b/arch/x86/include/uapi/asm/setup_data.h
new file mode 100644
index 000000000000..b111b0c18544
--- /dev/null
+++ b/arch/x86/include/uapi/asm/setup_data.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ASM_X86_SETUP_DATA_H
+#define _UAPI_ASM_X86_SETUP_DATA_H
+
+/* setup_data/setup_indirect types */
+#define SETUP_NONE			0
+#define SETUP_E820_EXT			1
+#define SETUP_DTB			2
+#define SETUP_PCI			3
+#define SETUP_EFI			4
+#define SETUP_APPLE_PROPERTIES		5
+#define SETUP_JAILHOUSE			6
+#define SETUP_CC_BLOB			7
+#define SETUP_IMA			8
+#define SETUP_RNG_SEED			9
+#define SETUP_ENUM_MAX			SETUP_RNG_SEED
+
+#define SETUP_INDIRECT			(1<<31)
+#define SETUP_TYPE_MAX			(SETUP_ENUM_MAX | SETUP_INDIRECT)
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+/* extensible setup data list node */
+struct setup_data {
+	__u64 next;
+	__u32 type;
+	__u32 len;
+	__u8 data[];
+};
+
+/* extensible setup indirect data node */
+struct setup_indirect {
+	__u32 type;
+	__u32 reserved;  /* Reserved, must be set to zero. */
+	__u64 len;
+	__u64 addr;
+};
+
+/*
+ * The E820 memory region entry of the boot protocol ABI:
+ */
+struct boot_e820_entry {
+	__u64 addr;
+	__u64 size;
+	__u32 type;
+} __attribute__((packed));
+
+/*
+ * The boot loader is passing platform information via this Jailhouse-specific
+ * setup data structure.
+ */
+struct jailhouse_setup_data {
+	struct {
+		__u16	version;
+		__u16	compatible_version;
+	} __attribute__((packed)) hdr;
+	struct {
+		__u16	pm_timer_address;
+		__u16	num_cpus;
+		__u64	pci_mmconfig_base;
+		__u32	tsc_khz;
+		__u32	apic_khz;
+		__u8	standard_ioapic;
+		__u8	cpu_ids[255];
+	} __attribute__((packed)) v1;
+	struct {
+		__u32	flags;
+	} __attribute__((packed)) v2;
+} __attribute__((packed));
+
+/*
+ * IMA buffer setup data information from the previous kernel during kexec
+ */
+struct ima_setup_data {
+	__u64 addr;
+	__u64 size;
+} __attribute__((packed));
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _UAPI_ASM_X86_SETUP_DATA_H */