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24a295e4ef
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with UAPI headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is mostly a mechanical patch (done with a simple "sed -i" statement), with some manual tweaks in <asm/frame.h>, <asm/hw_irq.h> and <asm/setup.h> that mentioned this macro in comments with some missing underscores. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250314071013.1575167-38-thuth@redhat.com
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/******************************************************************************
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* arch-x86_32.h
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*
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* Guest OS interface to x86 32-bit Xen.
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*
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* Copyright (c) 2004, K A Fraser
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*/
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#ifndef _ASM_X86_XEN_INTERFACE_32_H
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#define _ASM_X86_XEN_INTERFACE_32_H
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/*
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* These flat segments are in the Xen-private section of every GDT. Since these
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* are also present in the initial GDT, many OSes will be able to avoid
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* installing their own GDT.
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*/
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#define FLAT_RING1_CS 0xe019 /* GDT index 259 */
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#define FLAT_RING1_DS 0xe021 /* GDT index 260 */
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#define FLAT_RING1_SS 0xe021 /* GDT index 260 */
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#define FLAT_RING3_CS 0xe02b /* GDT index 261 */
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#define FLAT_RING3_DS 0xe033 /* GDT index 262 */
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#define FLAT_RING3_SS 0xe033 /* GDT index 262 */
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#define FLAT_KERNEL_CS FLAT_RING1_CS
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#define FLAT_KERNEL_DS FLAT_RING1_DS
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#define FLAT_KERNEL_SS FLAT_RING1_SS
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#define FLAT_USER_CS FLAT_RING3_CS
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#define FLAT_USER_DS FLAT_RING3_DS
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#define FLAT_USER_SS FLAT_RING3_SS
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/* And the trap vector is... */
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#define TRAP_INSTR "int $0x82"
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#define __MACH2PHYS_VIRT_START 0xF5800000
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#define __MACH2PHYS_VIRT_END 0xF6800000
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#define __MACH2PHYS_SHIFT 2
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/*
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* Virtual addresses beyond this are not modifiable by guest OSes. The
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* machine->physical mapping table starts at this address, read-only.
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*/
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#define __HYPERVISOR_VIRT_START 0xF5800000
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#ifndef __ASSEMBLER__
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struct cpu_user_regs {
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t esi;
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uint32_t edi;
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uint32_t ebp;
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uint32_t eax;
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uint16_t error_code; /* private */
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uint16_t entry_vector; /* private */
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uint32_t eip;
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uint16_t cs;
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uint8_t saved_upcall_mask;
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uint8_t _pad0;
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uint32_t eflags; /* eflags.IF == !saved_upcall_mask */
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uint32_t esp;
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uint16_t ss, _pad1;
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uint16_t es, _pad2;
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uint16_t ds, _pad3;
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uint16_t fs, _pad4;
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uint16_t gs, _pad5;
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};
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DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs);
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typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
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struct arch_vcpu_info {
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unsigned long cr2;
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unsigned long pad[5]; /* sizeof(struct vcpu_info) == 64 */
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};
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struct xen_callback {
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unsigned long cs;
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unsigned long eip;
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};
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typedef struct xen_callback xen_callback_t;
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#define XEN_CALLBACK(__cs, __eip) \
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((struct xen_callback){ .cs = (__cs), .eip = (unsigned long)(__eip) })
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#endif /* !__ASSEMBLER__ */
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/*
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* Page-directory addresses above 4GB do not fit into architectural %cr3.
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* When accessing %cr3, or equivalent field in vcpu_guest_context, guests
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* must use the following accessor macros to pack/unpack valid MFNs.
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*
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* Note that Xen is using the fact that the pagetable base is always
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* page-aligned, and putting the 12 MSB of the address into the 12 LSB
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* of cr3.
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*/
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#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20))
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#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20))
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#endif /* _ASM_X86_XEN_INTERFACE_32_H */
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