At present MTRRs are mirrored to the secondary CPUs only once, as those CPUs are started up. But U-Boot may add more MTRRs later, e.g. if it decides that a video console must be set up.
This series enhances the x86 multi-processor support to allow MTRRs to be updated at any time. It also updates the 'mtrr' command to support setting the MTRRs on CPUs other than the boot CPU.
Changes in v2: - Add comments to explain what start_aps() does - Drop change to include/dm/uclass.h - Mention error return in get_bsp() - Add more comments - Add a comment to run_ap_work() - Rename mtrr_save_all() to mtrr_read_all() - Add a new patch to avoid enabling SMP in SPL - Add new patch to add AP_DEFAULT_BASE to coral's memory map - Rename function to mtrr_write_all() - Keep things building by temporarily renaming the function in cmd/ - Drop the renamed mtrr_set_valid_() instead of mtrr_set_valid() - Add a new patch with more comments
Simon Glass (25): x86: mp_init: Switch to livetree x86: Move MP code into mp_init x86: mp_init: Avoid declarations in header files x86: mp_init: Switch parameter names in start_aps() x86: mp_init: Drop the num_cpus static variable x86: mtrr: Fix 'ensable' typo x86: mp_init: Set up the CPU numbers at the start x86: mp_init: Adjust bsp_init() to return more information x86: cpu: Remove unnecessary #ifdefs x86: mp: Support APs waiting for instructions global_data: Add a generic global_data flag for SMP state x86: Set the SMP flag when MP init is complete x86: mp: Allow running functions on multiple CPUs x86: mp: Park CPUs before running the OS x86: mp: Add iterators for CPUs x86: mtrr: Use MP calls to list the MTRRs x86: Don't enable SMP in SPL x86: coral: Update the memory map x86: mtrr: Update MTRRs on all CPUs x86: mtrr: Add support for writing to MTRRs on any CPU x86: mtrr: Update the command to use the new mtrr calls x86: mtrr: Restructure so command execution is in one place x86: mtrr: Update 'mtrr' to allow setting MTRRs on any CPU x86: mp: Add more comments to the module x86: mtrr: Enhance 'mtrr' command to list MTRRs on any CPU
arch/x86/cpu/Makefile | 2 +- arch/x86/cpu/cpu.c | 63 ++-- arch/x86/cpu/i386/cpu.c | 26 +- arch/x86/cpu/mp_init.c | 520 ++++++++++++++++++++++---- arch/x86/cpu/mtrr.c | 149 ++++++++ arch/x86/include/asm/mp.h | 132 ++++++- arch/x86/include/asm/mtrr.h | 51 +++ cmd/x86/mtrr.c | 148 +++++--- doc/board/google/chromebook_coral.rst | 1 + include/asm-generic/global_data.h | 1 + 10 files changed, 904 insertions(+), 189 deletions(-)