vasilito
68b1f74dbf
The earlier commit (6d1b11726) read /sys/class/dmi/id/sys_vendor
and /sys/class/dmi/id/product_name. Those are the Linux paths.
Redox exposes SMBIOS fields at /scheme/acpi/dmi/<field> via the
acpid userspace daemon. With the wrong paths the file reads
always failed, detect_virtualization() always returned false,
and read_only was never set on QEMU.
Now we read /scheme/acpi/dmi/sys_vendor and product_name (the
Redox-correct paths), and as a fallback when SMBIOS is absent
or uninformative we check the CPUID hypervisor-present bit
(leaf 1 ECX bit 31) via inline assembly. The CPUID pattern
mirrors local/recipes/system/redbear-power/source/src/cpuid.rs:168
which already uses this bit for the same purpose.
When either signal indicates virtualization, every CpuInfo is
constructed with read_only = true and apply_pstate() short-
circuits at the top. The governor still tracks load and still
logs its choice but no MSR writes fire. On bare metal the
existing path is preserved exactly.
The companion kernel fix in local/sources/kernel (commit
c2312627 on master) corrects a path-strip bug in the sys
scheme dispatcher that was preventing every MSR open from
succeeding with ENOENT. With both fixes together, cpufreqd
on QEMU enters read-only mode and the Ondemand governor stops
the P0->P1->P0 oscillation.
base
@ c335553c7e
bootloader
@ 3cc7ed909c
ctrlc
@ 3d2b25113a
installer
@ 8d1bad9eb4
libpciaccess
@ 1c33262e23
redox-drm
@ 02b05407fe
redoxfs
@ ab50acfcc7
relibc
@ a725e6ac8c
sysinfo
@ ee923581fb
userutils
@ 5dc4a8364e