The non-x86 part of this series is wholly contained in patch 01. Compared to other recent kvm-wide changes, this one is very straightforward (famous last words). Like a few other architectures, e.g. PPC, x86 uses a set of global hooks to call back into vendor code on demand. A handlful of the x86 hooks are used only within the scope of kvm_init(). This series moves the init-only hooks to a separate struct, partly to clean up the code a bit, but mainly so that the runtime hooks can be made available only after the x86 vendor has completed its ->hardware_setup(). While working on a different series I spent a fair bit of time scratching my as to why a kvm_x86_ops wasn't working, and eventually realized VMX's callback wasn't "ready" because the vmcs_config hadn't yet been populated. Due to lack of a cross-compiling setup, the non-x86 changes in patch 01 are untested. The SVM changes in patch 02 are fairly well tested, e.g. fudged things enough to ensure KVM didn't explode on a null pointer. Patch 05 is a bit scary as a rogue dereference of kvm_x86_ops before ->hardware_setup() will crash KVM (maybe the kernel?). I didn't find any obvious ways to use kvm_x86_ops on AMD, and tested on a few different Intel CPUs, so I'm reasonably confident that there are no existing violations. Sean Christopherson (5): KVM: Pass kvm_init()'s opaque param to additional arch funcs KVM: x86: Move init-only kvm_x86_ops to separate struct KVM: VMX: Move hardware_setup() definition below vmx_x86_ops KVM: VMX: Configure runtime hooks using vmx_x86_ops KVM: x86: Set kvm_x86_ops only after ->hardware_setup() completes arch/mips/kvm/mips.c | 4 +- arch/powerpc/kvm/powerpc.c | 4 +- arch/s390/kvm/kvm-s390.c | 4 +- arch/x86/include/asm/kvm_host.h | 13 +- arch/x86/kvm/svm.c | 15 +- arch/x86/kvm/vmx/nested.c | 15 +- arch/x86/kvm/vmx/nested.h | 3 +- arch/x86/kvm/vmx/vmx.c | 345 ++++++++++++++++---------------- arch/x86/kvm/x86.c | 16 +- include/linux/kvm_host.h | 4 +- virt/kvm/arm/arm.c | 4 +- virt/kvm/kvm_main.c | 18 +- 12 files changed, 238 insertions(+), 207 deletions(-) -- 2.24.1
