diff options
| author | Tom Lendacky <[email protected]> | 2017-11-06 14:17:53 -0600 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2017-11-17 15:30:33 +0100 |
| commit | ac5292e9a294618cecb31109d1ba265e3d027ba2 (patch) | |
| tree | 76e74e08320f656c0a7d860abf99f91dde7dfe31 /scripts/gcc-plugins | |
| parent | be62a32044061cb4a3b70a10598e093f1319102e (diff) | |
x86/boot: Fix boot failure when SMP MP-table is based at 0
When crosvm is used to boot a kernel as a VM, the SMP MP-table is found
at physical address 0x0. This causes mpf_base to be set to 0 and a
subsequent "if (!mpf_base)" check in default_get_smp_config() results in
the MP-table not being parsed. Further into the boot this results in an
oops when attempting a read_apic_id().
Add a boolean variable that is set to true when the MP-table is found.
Use this variable for testing if the MP-table was found so that even a
value of 0 for mpf_base will result in continued parsing of the MP-table.
Fixes: 5997efb96756 ("x86/boot: Use memremap() to map the MPF and MPC data")
Reported-by: Tomeu Vizoso <[email protected]>
Signed-off-by: Tom Lendacky <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'scripts/gcc-plugins')
0 files changed, 0 insertions, 0 deletions