This is an "early" RFC series for adding SGX virtualization to KVM. SGX virtualization (more specifically, EPC virtualization) is dependent on the not-yet-merged SGX enabling series and so cannot be considered for inclusion any time soon.
The primary goal of this RFC is to get feedback on the overall approach, e.g. code location, uAPI changes, functionality, etc... My hope is to sort out any major issues sooner rather than later, so that if/when the base SGX enabling is merged, virtualization support can quickly follow suit. That being said, nitpicking and bikeshedding is more than welcome :-) This code applies on top of a slightly modified version of v21 of the SGX enabling series[1]. The modifications on top of the SGX series are a few minor bug fixes that are not related to SGX virtualization, but affect code that is moved/modified by this series. The full source for the modified version of v21 can be found at: https://github.com/sean-jc/linux.git under the tag: sgx-v21-ish A corresponding Qemu RFC will (hopefully) follow next week, the Qemu patches need a bit more cleanup... [1] https://lkml.kernel.org/r/20190713170804.2340-1-jarkko.sakki...@linux.intel.com Sean Christopherson (21): x86/sgx: Add defines for SGX device minor numbers x86/sgx: Move bus registration and device init to common code x86/sgx: Move provisioning device to common code x86/sgx: Add /dev/sgx/virt_epc device to allocate "raw" EPC for VMs x86/sgx: Expose SGX architectural definitions to the kernel KVM: x86: Add SGX sub-features leaf to reverse CPUID table KVM: x86: Add WARN_ON_ONCE(index!=0) in __do_cpuid_ent KVM: x86: Add kvm_x86_ops hook to short circuit emulation KVM: VMX: Add basic handling of VM-Exit from SGX enclave KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for VMX/SGX KVM: x86: Export kvm_propagate_fault (as kvm_propagate_page_fault) KVM: x86: Define new #PF SGX error code bit x86/sgx: Move the intermediate EINIT helper into the driver x86/sgx: Add helpers to expose ECREATE and EINIT to KVM KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions KVM: VMX: Edd emulation of SGX Launch Control LE hash MSRs KVM: VMX: Add handler for ENCLS[EINIT] to support SGX Launch Control KVM: x86: Invoke kvm_x86_ops->cpuid_update() after kvm_update_cpuid() KVM: VMX: Enable SGX virtualization for SGX1, SGX2 and LC x86/sgx: Export sgx_set_attribute() for use by KVM KVM: x86: Add capability to grant VM access to privileged SGX attribute Documentation/virtual/kvm/api.txt | 20 ++ arch/x86/Kconfig | 13 + arch/x86/include/asm/kvm_host.h | 8 +- arch/x86/include/asm/sgx.h | 17 + .../cpu/sgx/arch.h => include/asm/sgx_arch.h} | 1 + arch/x86/include/asm/vmx.h | 1 + arch/x86/include/uapi/asm/vmx.h | 1 + arch/x86/kernel/cpu/sgx/Makefile | 1 + arch/x86/kernel/cpu/sgx/driver/driver.h | 3 +- arch/x86/kernel/cpu/sgx/driver/ioctl.c | 40 ++- arch/x86/kernel/cpu/sgx/driver/main.c | 73 +---- arch/x86/kernel/cpu/sgx/encl.c | 2 +- arch/x86/kernel/cpu/sgx/encls.h | 2 +- arch/x86/kernel/cpu/sgx/main.c | 141 ++++++-- arch/x86/kernel/cpu/sgx/sgx.h | 16 +- arch/x86/kernel/cpu/sgx/virt.c | 308 ++++++++++++++++++ arch/x86/kernel/cpu/sgx/virt.h | 14 + arch/x86/kvm/Makefile | 2 + arch/x86/kvm/cpuid.c | 135 ++++++-- arch/x86/kvm/cpuid.h | 20 ++ arch/x86/kvm/emulate.c | 1 + arch/x86/kvm/mmu.c | 12 - arch/x86/kvm/svm.c | 19 +- arch/x86/kvm/vmx/nested.c | 21 +- arch/x86/kvm/vmx/nested.h | 5 + arch/x86/kvm/vmx/sgx.c | 247 ++++++++++++++ arch/x86/kvm/vmx/sgx.h | 11 + arch/x86/kvm/vmx/vmcs12.c | 1 + arch/x86/kvm/vmx/vmcs12.h | 4 +- arch/x86/kvm/vmx/vmx.c | 251 +++++++++++++- arch/x86/kvm/vmx/vmx.h | 6 + arch/x86/kvm/x86.c | 40 ++- arch/x86/kvm/x86.h | 5 - include/uapi/linux/kvm.h | 1 + tools/testing/selftests/x86/sgx/defines.h | 2 +- 35 files changed, 1234 insertions(+), 210 deletions(-) create mode 100644 arch/x86/include/asm/sgx.h rename arch/x86/{kernel/cpu/sgx/arch.h => include/asm/sgx_arch.h} (99%) create mode 100644 arch/x86/kernel/cpu/sgx/virt.c create mode 100644 arch/x86/kernel/cpu/sgx/virt.h create mode 100644 arch/x86/kvm/vmx/sgx.c create mode 100644 arch/x86/kvm/vmx/sgx.h -- 2.22.0
