From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757591Ab3FGXDs (ORCPT ); Fri, 7 Jun 2013 19:03:48 -0400 Received: from mail-ie0-f172.google.com ([209.85.223.172]:43315 "EHLO mail-ie0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756156Ab3FGXDq (ORCPT ); Fri, 7 Jun 2013 19:03:46 -0400 From: David Daney To: linux-mips@linux-mips.org, ralf@linux-mips.org, kvm@vger.kernel.org, Sanjay Lal Cc: linux-kernel@vger.kernel.org, David Daney Subject: [PATCH 00/31] KVM/MIPS: Implement hardware virtualization via the MIPS-VZ extensions. Date: Fri, 7 Jun 2013 16:03:04 -0700 Message-Id: <1370646215-6543-1-git-send-email-ddaney.cavm@gmail.com> X-Mailer: git-send-email 1.7.11.7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Daney These patches take a somewhat different approach to MIPS virtualization via the MIPS-VZ extensions than the patches previously sent by Sanjay Lal. Several facts about the code: o Existing exception handlers are modified to hook in to KVM instead of intercepting all exceptions via the EBase register, and then chaining to real exception handlers. o Able to boot 64-bit SMP guests that use the FPU (I have booted 4-way SMP 64-bit MIPS/Linux). o Additional overhead on every exception even when *no* vCPU is running. o Lower interrupt overhead, than the EBase interception method, when vCPU *is* running. o This code is somewhat smaller than the existing trap/emulate implementation (about 2100 lines vs. about 5300 lines) o Currently probably only usable on the OCTEON III CPU model, as some MIPS-VZ implementation-defined behaviors were assumed to have the OCTEON III behavior. Note: I think Ralf already has the 17/31 (MIPS: Quit exposing Kconfig symbols in uapi headers.) queued, but I also include it here. David Daney (31): MIPS: Move allocate_kscratch to cpu-probe.c and make it public. MIPS: Save and restore K0/K1 when CONFIG_KVM_MIPSVZ mips/kvm: Fix 32-bitisms in kvm_locore.S mips/kvm: Add casts to avoid pointer width mismatch build failures. mips/kvm: Use generic cache flushing functions. mips/kvm: Rename kvm_vcpu_arch.pc to kvm_vcpu_arch.epc mips/kvm: Rename VCPU_registername to KVM_VCPU_ARCH_registername mips/kvm: Fix code formatting in arch/mips/kvm/kvm_locore.S mips/kvm: Factor trap-and-emulate support into a pluggable implementation. mips/kvm: Implement ioctls to get and set FPU registers. MIPS: Rearrange branch.c so it can be used by kvm code. MIPS: Add instruction format information for WAIT, MTC0, MFC0, et al. mips/kvm: Add accessors for MIPS VZ registers. mips/kvm: Add thread_info flag to indicate operation in MIPS VZ Guest Mode. mips/kvm: Exception handling to leave and reenter guest mode. mips/kvm: Add exception handler for MIPSVZ Guest exceptions. MIPS: Quit exposing Kconfig symbols in uapi headers. mips/kvm: Add pt_regs slots for BadInstr and BadInstrP mips/kvm: Add host definitions for MIPS VZ based host. mips/kvm: Hook into TLB fault handlers. mips/kvm: Allow set_except_vector() to be used from MIPSVZ code. mips/kvm: Split get_new_mmu_context into two parts. mips/kvm: Hook into CP unusable exception handler. mips/kvm: Add thread_struct fields used by MIPSVZ hosts. mips/kvm: Add some asm-offsets constants used by MIPSVZ. mips/kvm: Split up Kconfig and Makefile definitions in preperation for MIPSVZ. mips/kvm: Gate the use of kvm_local_flush_tlb_all() by KVM_MIPSTE mips/kvm: Only use KVM_COALESCED_MMIO_PAGE_OFFSET with KVM_MIPSTE mips/kvm: Add MIPSVZ support. mips/kvm: Enable MIPSVZ in Kconfig/Makefile mips/kvm: Allow for upto 8 KVM vcpus per vm. arch/mips/Kconfig | 1 + arch/mips/include/asm/branch.h | 7 + arch/mips/include/asm/kvm_host.h | 622 +----------- arch/mips/include/asm/kvm_mips_te.h | 589 +++++++++++ arch/mips/include/asm/kvm_mips_vz.h | 29 + arch/mips/include/asm/mipsregs.h | 264 +++++ arch/mips/include/asm/mmu_context.h | 12 +- arch/mips/include/asm/processor.h | 6 + arch/mips/include/asm/ptrace.h | 36 + arch/mips/include/asm/stackframe.h | 150 ++- arch/mips/include/asm/thread_info.h | 2 + arch/mips/include/asm/uasm.h | 2 +- arch/mips/include/uapi/asm/inst.h | 23 +- arch/mips/include/uapi/asm/ptrace.h | 17 +- arch/mips/kernel/asm-offsets.c | 124 ++- arch/mips/kernel/branch.c | 63 +- arch/mips/kernel/cpu-probe.c | 34 + arch/mips/kernel/genex.S | 8 + arch/mips/kernel/scall64-64.S | 12 + arch/mips/kernel/scall64-n32.S | 12 + arch/mips/kernel/traps.c | 15 +- arch/mips/kvm/Kconfig | 23 +- arch/mips/kvm/Makefile | 15 +- arch/mips/kvm/kvm_locore.S | 980 +++++++++--------- arch/mips/kvm/kvm_mips.c | 768 ++------------ arch/mips/kvm/kvm_mips_comm.h | 1 + arch/mips/kvm/kvm_mips_commpage.c | 9 +- arch/mips/kvm/kvm_mips_dyntrans.c | 4 +- arch/mips/kvm/kvm_mips_emul.c | 312 +++--- arch/mips/kvm/kvm_mips_int.c | 53 +- arch/mips/kvm/kvm_mips_int.h | 2 - arch/mips/kvm/kvm_mips_stats.c | 6 +- arch/mips/kvm/kvm_mipsvz.c | 1894 +++++++++++++++++++++++++++++++++++ arch/mips/kvm/kvm_mipsvz_guest.S | 234 +++++ arch/mips/kvm/kvm_tlb.c | 140 +-- arch/mips/kvm/kvm_trap_emul.c | 932 +++++++++++++++-- arch/mips/mm/fault.c | 8 + arch/mips/mm/tlbex-fault.S | 6 + arch/mips/mm/tlbex.c | 45 +- 39 files changed, 5299 insertions(+), 2161 deletions(-) create mode 100644 arch/mips/include/asm/kvm_mips_te.h create mode 100644 arch/mips/include/asm/kvm_mips_vz.h create mode 100644 arch/mips/kvm/kvm_mipsvz.c create mode 100644 arch/mips/kvm/kvm_mipsvz_guest.S -- 1.7.11.7