This is much more efficient than parsing hundreds of lines of /proc/cpuinfo
and also causes hundreds of thousands less allocations at startup. For systems
with dozens of virtual CPUs the deduplication of device objects was increasing
start up time considerably.
Use the msr plugin to read the microcode version as this is not obtained using
CPUID, as it is instead being provided in an MSR.
To do this, rely on the AppStream ID to map to a translated string (providing a
fallback for clients that do not care) and switch the free-form result string
into a set of enumerated values that can be translated.
This fixes some of the problems where some things have to be enabled to "pass"
and other attributes have to be some other state. For cases where we want the
user to "do" something, provide a URL to a wiki page that we update out-of-band
of fwupd releases.
This only checks that it was available from the CPU.
To be complete an additional check should be made to show that it
was actually enabled from the firmware.
This will require a kernel modification though because MSR access
will be forbidden from userland while in kernel lockdown.
The HSI specification is currently incomplete and in active development.
Sample output for my Lenovo P50 Laptop:
Host Security ID: HSI:2+UA!
HSI-1
✔ UEFI dbx: OK
✔ TPM: v2.0
✔ SPI: Write disabled
✔ SPI: Lock enabled
✔ SPI: SMM required
✔ UEFI Secure Boot: Enabled
HSI-2
✔ TPM Reconstruction: Matched PCR0 reading
HSI-3
✘ Linux Kernel S3 Sleep: Deep sleep available
HSI-4
✘ Intel CET: Unavailable
Runtime Suffix -U
✔ Firmware Updates: Newest release is 8 months old
Runtime Suffix -A
✔ Firmware Attestation: OK
Runtime Suffix -!
✔ fwupd plugins: OK
✔ Linux Kernel: OK
✔ Linux Kernel: Locked down
✘ Linux Swap: Not encrypted
New enough hardware to have this feature isn't going to be in the marketplace
for a while. To use that newer hardware requires a very recent kernel (5.6 at
least, although it will probably be at least 5.9 by the time the hardware is
released).
The CET status will be used in future functionality.
