Hi all, This series changes the initialization of two virtual registers to make sure they match the value of the underlying physical cpu.
It also disables cpus different from the boot cpu, unless a newly introduced command line option is specified. In that case, it explains how to setup the system to avoid corruptions, which involves manually specifying the cpu affinity of all domains, because the scheduler still lacks big.LITTLE support. In the uncommon case of a system where the cacheline sizes are different across cores, it disables all cores that have a different dcache line size from the boot cpu. In fact, it is not sufficient to use the dcache line size of the current cpu, it would be necessary to use the minimum across all dcache line sizes of all cores. Given that it is actually uncommon even in big.LITTLE systems, just disable cpus for now. The first patch in the series is a fix for the way we read the dcache line size. Cheers, Stefano Julien Grall (1): xen/arm: Park CPUs with a MIDR different from the boot CPU. Stefano Stabellini (6): xen/arm: Read the dcache line size from CTR register xen/arm: make processor a per cpu variable xen/arm: read ACTLR on the pcpu where the vcpu will run xen/arm: set VPIDR based on the MIDR value of the underlying pCPU xen/arm: update the docs about heterogeneous computing xen/arm: disable CPUs with different dcache line sizes docs/misc/arm/big.LITTLE.txt | 46 +++++++++++++++++++++++++++++++++++++ docs/misc/xen-command-line.markdown | 15 ++++++++++++ xen/arch/arm/arm32/head.S | 2 +- xen/arch/arm/arm64/head.S | 2 +- xen/arch/arm/domain.c | 15 ++++++------ xen/arch/arm/processor.c | 8 +++---- xen/arch/arm/setup.c | 17 ++------------ xen/arch/arm/smpboot.c | 39 +++++++++++++++++++++++++++++++ xen/arch/arm/vcpreg.c | 4 ++-- xen/include/asm-arm/cpregs.h | 2 ++ xen/include/asm-arm/domain.h | 3 --- xen/include/asm-arm/page.h | 27 +++++++++++++++------- 12 files changed, 138 insertions(+), 42 deletions(-) create mode 100644 docs/misc/arm/big.LITTLE.txt _______________________________________________ Xen-devel mailing list Xenfirstname.lastname@example.org https://lists.xenproject.org/mailman/listinfo/xen-devel