diff options
| author | Jason A. Donenfeld | 2022-07-21 14:56:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2022-07-22 19:26:34 +0200 |
| commit | 67f7e426e53833a5db75b0d813e8d537b8a75bd2 (patch) | |
| tree | 298a156beaf064924fe109524932123bc0b369eb /hw/i386/pc.c | |
| parent | hw/rx: pass random seed to fdt (diff) | |
| download | qemu-67f7e426e53833a5db75b0d813e8d537b8a75bd2.tar.gz qemu-67f7e426e53833a5db75b0d813e8d537b8a75bd2.tar.xz qemu-67f7e426e53833a5db75b0d813e8d537b8a75bd2.zip | |
hw/i386: pass RNG seed via setup_data entry
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>
Diffstat (limited to 'hw/i386/pc.c')
| -rw-r--r-- | hw/i386/pc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 774cb2bf07..d2b5823ffb 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -796,7 +796,7 @@ void xen_load_linux(PCMachineState *pcms) rom_set_fw(fw_cfg); x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size, - pcmc->pvh_enabled); + pcmc->pvh_enabled, pcmc->legacy_no_rng_seed); for (i = 0; i < nb_option_roms; i++) { assert(!strcmp(option_rom[i].name, "linuxboot.bin") || !strcmp(option_rom[i].name, "linuxboot_dma.bin") || @@ -992,7 +992,7 @@ void pc_memory_init(PCMachineState *pcms, if (linux_boot) { x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size, - pcmc->pvh_enabled); + pcmc->pvh_enabled, pcmc->legacy_no_rng_seed); } for (i = 0; i < nb_option_roms; i++) { |