[PATCH 0/7] Allow the kernel to be booted in HYP mode
Marc Zyngier
marc.zyngier at arm.com
Sat Aug 11 07:04:30 EDT 2012
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
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