michaelh/zephyr
1
0
Fork 0
Code Releases Activity

boards: x86: minnowboard: Do not assign promptless X86_NO_SPECTRE_V4

Browse source 
Assignments to promptless symbols have no effect. Flagged by
https://github.com/zephyrproject-rtos/zephyr/pull/20742.

From looking at
http://www.mouser.com
  /catalog/specsheets/CircuitCO_595-MINNOWMAX-DUAL%20Data%20Sheet.pdf
, this board uses an Intel Atom E3815 or an Intel Atom E3825 CPU.

Both of those CPUs are listed as vulnerable to all three variants of
Meltdown and Spectre in
https://www.techarp.com/guides/complete-meltdown-spectre-cpu-list/6/.

All the X86_NO_SPECTRE_V* symbols default to n (and it seems nothing
turns them on at the moment), so just remove the assignment, which will
be a no-op.

Also remove the comment re. Spectre V4, as it seems this board is
vulnerable to more than that, though I could've missed something.

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
This commit is contained in:
Ulf Magnusson 2020-01-16 15:59:56 +01:00 • committed by Anas Nashif
commit c935c26819
1 changed files with 0 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

4
boards/x86/minnowboard/minnowboard_defconfig
View file

@ -11,7 +11,3 @@ CONFIG_SERIAL=y
CONFIG_UART_NS16550=y
CONFIG_UART_CONSOLE=y
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=25000000
# According to INTEL-SA-00115, series E of Atom(tm) processors
# are affected.
CONFIG_X86_NO_SPECTRE_V4=n