diff options
| 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 /include/hw/i386/pc.h | |
| parent | c287941a4dd5570e4221b0a58590f7231f896e51 (diff) | |
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 'include/hw/i386/pc.h')
| -rw-r--r-- | include/hw/i386/pc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index b7735dccfc..2a8ffbcfa8 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -127,6 +127,9 @@ struct PCMachineClass { /* create kvmclock device even when KVM PV features are not exposed */ bool kvmclock_create_always; + + /* skip passing an rng seed for legacy machines */ + bool legacy_no_rng_seed; }; #define TYPE_PC_MACHINE "generic-pc-machine" |