This series is aimed at offering the minimum level of support that KVM needs when it comes to architected timers. The first patch changes the driver to use the virtual timer by default instead of the physical one (access to the later is conditioned by the hypervisor settings, while the former is always available). This could be required even if the kernel is not running as a guest. The second patch exposes a clockcycle counter that can be used by other subsystems. Tested on A15 (VE+TC2), both as a host and a KVM guest. Patches against v3.6-rc4. * From v3: - Use %Q/%R qualifiers to read 64bit registers, and move accessors into a separate function. - Some minor cleanup. * From v2: - Trick the compiler into generating really nice code, at the expense of a certain lack of abstraction - Don't mandate physical timer non-secure PPI, in order to stay compatible with existing and possibly incomplete DTs. Marc Zyngier (2): ARM: arch_timers: enable the use of the virtual timer ARM: arch_timers: register a time/cycle counter arch/arm/include/asm/arch_timer.h | 7 + arch/arm/kernel/arch_timer.c | 368 +++++++++++++++++++++++++++----------- 2 files changed, 273 insertions(+), 102 deletions(-) -- 1.7.12 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
