This patch series introduces system management mode support. There is still some work to do, namely: test without unrestricted guest support, test on AMD, disable the capability if !unrestricted guest and !emulate invalid guest state(*), test with a QEMU that understand KVM_MEM_X86_SMRAM, actually post QEMU patches that let you use this. (*) newer chipsets moved away from legacy SMRAM at 0xa0000, thus support for real mode CS base above 1M is necessary Because legacy SMRAM is a mess, I have tried these patches with Q35's high SMRAM (at 0xfeda0000). This means that right now this isn't the easiest thing to test; you need QEMU patches that add support for high SMRAM, and SeaBIOS patches to use high SMRAM. Until QEMU support for KVM_MEM_X86_SMRAM is in place, also, I'm keeping SMRAM open in SeaBIOS. That said, even this clumsy and incomplete userspace configuration is enough to test all patches except 11 and 12. The series is structured as follows. Patch 1 is an unrelated bugfix (I think). Patches 2 to 6 extend some infrastructure functions. Patches 1 to 4 could be committed right now. Patches 7 to 9 implement basic support for SMM in the KVM API and teach KVM about doing the world switch on SMI and RSM. Patch 10 touches all places in KVM that read/write guest memory to go through an x86-specific function. The x86-specific function takes a VCPU rather than a struct kvm. This is used in patches 11 and 12 to limits access to specially marked SMRAM slots unless the VCPU is in system management mode. Finally, patch 13 exposes the new capability for userspace to probe. Paolo Paolo Bonzini (12): KVM: MMU: fix for CR4.SMEP=1, CR0.WP=0? KVM: export __gfn_to_pfn_memslot, drop gfn_to_pfn_async KVM: remove unnecessary arg from mark_page_dirty_in_slot, export it KVM: x86: pass host_initiated to functions that read MSRs KVM: x86: pass the whole hflags field to emulator and back KVM: x86: API changes for SMM support KVM: x86: stubs for SMM support KVM: x86: save/load state on SMM switch KVM: x86: add vcpu-specific functions to read/write/translate GFNs KVM: x86: add SMM to the MMU role KVM: x86: add KVM_MEM_X86_SMRAM memory slot flag KVM: x86: advertise KVM_CAP_X86_SMM Radim Krčmář (1): KVM: reuse memslot in kvm_write_guest_page Documentation/virtual/kvm/api.txt | 52 ++++- arch/x86/include/asm/kvm_emulate.h | 7 +- arch/x86/include/asm/kvm_host.h | 39 ++-- arch/x86/include/asm/vmx.h | 1 + arch/x86/include/uapi/asm/kvm.h | 10 + arch/x86/kvm/Makefile | 2 +- arch/x86/kvm/cpuid.h | 8 + arch/x86/kvm/emulate.c | 257 ++++++++++++++++++++- arch/x86/kvm/kvm_cache_regs.h | 5 + arch/x86/kvm/lapic.c | 26 ++- arch/x86/kvm/mmu.c | 20 +- arch/x86/kvm/paging_tmpl.h | 8 +- arch/x86/kvm/smram.c | 229 +++++++++++++++++++ arch/x86/kvm/svm.c | 63 +++--- arch/x86/kvm/vmx.c | 74 +++--- arch/x86/kvm/x86.c | 452 ++++++++++++++++++++++++++++++------- include/linux/kvm_host.h | 20 +- include/uapi/linux/kvm.h | 5 +- virt/kvm/kvm_main.c | 48 ++-- 19 files changed, 1095 insertions(+), 231 deletions(-) create mode 100644 arch/x86/kvm/smram.c -- 1.8.3.1 -- 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
