67f7e426e5
Tiny machines optimized for fast boot time generally don't use EFI, which means a random seed has to be supplied some other way. For this purpose, Linux (≥5.20) supports passing a seed in the setup_data table with SETUP_RNG_SEED, specially intended for hypervisors, kexec, and specialized bootloaders. The linked commit shows the upstream kernel implementation. At Paolo's request, we don't pass these to versioned machine types ≤7.0. Link: https://git.kernel.org/tip/tip/c/68b8e9713c8 Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Eduardo Habkost <eduardo@habkost.net> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Philippe Mathieu-Daudé <f4bug@amsat.org> Cc: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Message-Id: <20220721125636.446842-1-Jason@zx2c4.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _ASM_X86_BOOTPARAM_H
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#define _ASM_X86_BOOTPARAM_H
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/* setup_data/setup_indirect types */
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#define SETUP_NONE 0
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#define SETUP_E820_EXT 1
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#define SETUP_DTB 2
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#define SETUP_PCI 3
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#define SETUP_EFI 4
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#define SETUP_APPLE_PROPERTIES 5
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#define SETUP_JAILHOUSE 6
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#define SETUP_RNG_SEED 9
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#define SETUP_INDIRECT (1<<31)
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/* SETUP_INDIRECT | max(SETUP_*) */
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#define SETUP_TYPE_MAX (SETUP_INDIRECT | SETUP_JAILHOUSE)
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/* ram_size flags */
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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/* loadflags */
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#define LOADED_HIGH (1<<0)
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#define KASLR_FLAG (1<<1)
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#define QUIET_FLAG (1<<5)
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#define KEEP_SEGMENTS (1<<6)
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#define CAN_USE_HEAP (1<<7)
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/* xloadflags */
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#define XLF_KERNEL_64 (1<<0)
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#define XLF_CAN_BE_LOADED_ABOVE_4G (1<<1)
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#define XLF_EFI_HANDOVER_32 (1<<2)
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#define XLF_EFI_HANDOVER_64 (1<<3)
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#define XLF_EFI_KEXEC (1<<4)
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#define XLF_5LEVEL (1<<5)
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#define XLF_5LEVEL_ENABLED (1<<6)
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#endif /* _ASM_X86_BOOTPARAM_H */
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