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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-07-21 14:56:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-07-22 19:26:34 +0200 |
| commit | 67f7e426e53833a5db75b0d813e8d537b8a75bd2 (patch) | |
| tree | 298a156beaf064924fe109524932123bc0b369eb /hw/i386/pc_piix.c | |
| parent | c287941a4dd5570e4221b0a58590f7231f896e51 (diff) | |
| download | qemu-67f7e426e53833a5db75b0d813e8d537b8a75bd2.zip qemu-67f7e426e53833a5db75b0d813e8d537b8a75bd2.tar.gz qemu-67f7e426e53833a5db75b0d813e8d537b8a75bd2.tar.bz2 | |
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_piix.c')
| -rw-r--r-- | hw/i386/pc_piix.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index a234989..fbf9465 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -438,9 +438,11 @@ DEFINE_I440FX_MACHINE(v7_1, "pc-i440fx-7.1", NULL, static void pc_i440fx_7_0_machine_options(MachineClass *m) { + PCMachineClass *pcmc = PC_MACHINE_CLASS(m); pc_i440fx_7_1_machine_options(m); m->alias = NULL; m->is_default = false; + pcmc->legacy_no_rng_seed = true; compat_props_add(m->compat_props, hw_compat_7_0, hw_compat_7_0_len); compat_props_add(m->compat_props, pc_compat_7_0, pc_compat_7_0_len); } |