This patchset implements KVM support for MIPS32 processors, using Trap & Emulation. In KVM mode, CPU virtualization is handled via the kvm kernel module, while system and I/O virtualization leverage the Malta model already present in QEMU. Both Guest kernel and Guest Userspace execute in UM. The Guest address space is as folows: Guest User address space: 0x00000000 -> 0x40000000 Guest Kernel Unmapped: 0x40000000 -> 0x60000000 Guest Kernel Mapped: 0x60000000 -> 0x80000000 As a result, Guest Usermode virtual memory is limited to 1GB. KVM support (by trap and emulate) was added to the Linux kernel in v3.10. Changes in v3: Changes mostly addressing review comments from v2 patchset. A git tag for this version of the patchset can also be found on github: https://github.com/jahogan/qemu-kvm-mips.git kvm-mips-v3 - Remove "target-mips: Set target page size to 16K in KVM mode". It should actually work fine with 4k TARGET_PAGE_SIZE as long as there is no cache aliasing or both host and guest kernels are configured to a sufficient page size to avoid aliasing (which the kernel arch/mips/kvm/00README.txt alludes to anyway). - Rewrote kvm sigmask patch to allow sigmask length to be set by kvm_arch_init(), so that MIPS can set it to 16 as it has 128 signals. This is better than cluttering kvm-all.c with TARGET_* ifdefs (Peter Maydell). - Set sigmask length to 16 from kvm_arch_init() since MIPS Linux has 128 signals. This is better than cluttering kvm_all.c with TARGET_* ifdefs (Peter Maydell). - s/dprintf/DPRINTF/ (Andreas Färber). - Use "cs" rather than "cpu" or "env" for CPUState variable names (Andreas Färber). - Use CPUMIPSState rather than CPUArchState (Andreas Färber). - Pass MIPSCPU to cpu_mips_io_interrupts_pending() rather than CPUMIPSState (Andreas Färber). - Remove spurious parentheses around cpu_mips_io_interrupts_pending() call (Andreas Färber). - Pass MIPSCPU to kvm_mips_set_[ipi_]interrupt (Andreas Färber). - Make use of error_report (Andreas Färber) and clean up error messages a little to include __func__. - Remove inline kvm_mips_{put,get}_one_[ul]reg() declarations from kvm_mips.h. They're only used in target-mips/kvm.c anyway. - Make kvm_arch_{put,get}_registers static within target-mips/kvm.c and remove from kvm_mips.h. - Remove unnecessary includes from Malta patch, especially linux/kvm.h which isn't a good idea on non-Linux (Peter Maydell). Changes in v2: This patchset is based on Sanjay Lal's V1 patchset from 2nd March 2013: https://patchwork.kernel.org/project/kvm/list/?submitter=51991&state=*&q=qemu-devel I think I've addressed all the V1 feedback. The other main change is the removal of the boot-CPS ROM code binary blob and GIC/SMP support since it's all slightly orthogonal to KVM support. Instead the existing minimal bootloader code for Malta has been updated to work with KVM T&E. A git tag for this version of the patchset can also be found on github: https://github.com/jahogan/qemu-kvm-mips.git kvm-mips-v2 - Expand commit messages - Rebase on v1.7.0 - Misc checkpatch and other cleanups - Some interrupt bug fixes from Yann Le Du <ledu@xxxxxxxxxxx> - Add get/set register functionality from Yann Le Du <ledu@xxxxxxxxxxx> - Use new 64 bit compatible ABI from Cavium from Sanjay Lal <sanjayl@xxxxxxxxxxx> - Add dummy kvm_arch_init_irq_routing() The common KVM code insists on calling kvm_arch_init_irq_routing() as soon as it sees kernel header support for it (regardless of whether QEMU supports it). Provide a dummy function to satisfy this. - Remove request_interrupt_window code (Peter Maydell) - Remove #ifdef CONFIG_KVM where guarded by kvm_enabled() already - Removal of cps / GIC / SMP support - Minimal bootloader modified to execute safely from RAM - Create asm-mips symlink using generic code and move above default case (Peter Maydell) - Remove redundant check of target_name = cpu = mips - Remove mipsel cross compilation fix, which is now fixed by commit 61cc919f73ea (configure: detect endian via compile test) - Add translation of guest kernel segments to allow an attached gdb to see kernel memory correctly James Hogan (4): target-mips: get_physical_address: Add defines for segment bases target-mips: get_physical_address: Add KVM awareness kvm: Allow arch to set sigmask length hw/mips: malta: Add KVM support Sanjay Lal (5): hw/mips/cputimer: Don't start periodic timer in KVM mode hw/mips: Add API to convert KVM guest KSEG0 <-> GPA target-mips: kvm: Add main KVM support for MIPS hw/mips: In KVM mode, inject IRQ2 (I/O) interupts via ioctls target-mips: Enable KVM support in build system configure | 6 +- hw/mips/addr.c | 10 + hw/mips/cputimer.c | 13 +- hw/mips/mips_int.c | 11 ++ hw/mips/mips_malta.c | 82 +++++--- include/hw/mips/cpudevs.h | 4 + include/sysemu/kvm.h | 2 + kvm-all.c | 11 +- target-mips/Makefile.objs | 1 + target-mips/helper.c | 51 +++-- target-mips/kvm.c | 472 ++++++++++++++++++++++++++++++++++++++++++++++ target-mips/kvm_mips.h | 19 ++ 12 files changed, 642 insertions(+), 40 deletions(-) create mode 100644 target-mips/kvm.c create mode 100644 target-mips/kvm_mips.h -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
