This patch series allows the kernel (and the decompressor) to be entered in HYP mode, which is a requirement for supporting hypervisors such as KVM. The main idea is to have a stub hypervisor to go back and forth between HYP and SVC modes, and let the kernel install a full blown hypervisor if necessary. Also, we ensure that a kernel without virt support can still be entered in HYP mode and safely go back to SVC. Most of the heavy lifting has been done by Dave Martin, but all bugs have been introduced by me while reworking it. This series also relies on Dave's earlier opcode injection series : http://comments.gmane.org/gmane.linux.ports.arm.kernel/180901 It's been tested on a variety of platforms (VE A9/A15, Fast Model) with all combinaisons of entering in HYP or SVC, ARM or Thumb2 kernels. Patches against 3.6-rc1. Dave Martin (5): ARM: virt: allow the kernel to be entered in HYP mode ARM: zImage/virt: hyp mode entry support for the zImage loader ARM: virt: Update documentation for hyp mode entry support ARM: virt: Add boot-time diagnostics ARM: virt: Add CONFIG_ARM_VIRT_EXT option Marc Zyngier (2): ARM: opcodes: add __ERET/__MSR_ELR_HYP instruction encoding ARM: virt: arch_timers: enable access to physical timers Documentation/arm/Booting | 22 ++++- arch/arm/boot/compressed/.gitignore | 1 + arch/arm/boot/compressed/Makefile | 9 ++- arch/arm/boot/compressed/head.S | 71 ++++++++++- arch/arm/include/asm/assembler.h | 28 +++++ arch/arm/include/asm/opcodes-virt.h | 10 ++ arch/arm/include/asm/ptrace.h | 1 + arch/arm/include/asm/virt.h | 69 +++++++++++ arch/arm/kernel/Makefile | 2 + arch/arm/kernel/head.S | 14 ++- arch/arm/kernel/hyp-stub.S | 218 +++++++++++++++++++++++++++++++++++ arch/arm/kernel/setup.c | 20 +++ arch/arm/kernel/smp.c | 3 + arch/arm/mm/Kconfig | 17 +++ 14 files changed, 473 insertions(+), 12 deletions(-) create mode 100644 arch/arm/include/asm/virt.h create mode 100644 arch/arm/kernel/hyp-stub.S -- 1.7.8.6 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
