Messages in this thread | | | From | Maxim Levitsky <> | Subject | [PATCH v2 00/11] SMM emulation and interrupt shadow fixes | Date | Tue, 21 Jun 2022 18:08:51 +0300 |
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This patch series is a result of long debug work to find out why sometimes guests with win11 secure boot were failing during boot.
During writing a unit test I found another bug, turns out that on rsm emulation, if the rsm instruction was done in real or 32 bit mode, KVM would truncate the restored RIP to 32 bit.
I also refactored the way we write SMRAM so it is easier now to understand what is going on.
The main bug in this series which I fixed is that we allowed #SMI to happen during the STI interrupt shadow, and we did nothing to both reset it on #SMI handler entry and restore it on RSM.
Best regards, Maxim Levitsky
Maxim Levitsky (11): KVM: x86: emulator: em_sysexit should update ctxt->mode KVM: x86: emulator: introduce update_emulation_mode KVM: x86: emulator: remove assign_eip_near/far KVM: x86: emulator: update the emulation mode after rsm KVM: x86: emulator: update the emulation mode after CR0 write KVM: x86: emulator/smm: number of GPRs in the SMRAM image depends on the image format KVM: x86: emulator/smm: add structs for KVM's smram layout KVM: x86: emulator/smm: use smram struct for 32 bit smram load/restore KVM: x86: emulator/smm: use smram struct for 64 bit smram load/restore KVM: x86: SVM: use smram structs KVM: x86: emulator/smm: preserve interrupt shadow in SMRAM
arch/x86/include/asm/kvm_host.h | 6 - arch/x86/kvm/emulate.c | 305 ++++++++++++++++---------------- arch/x86/kvm/kvm_emulate.h | 146 +++++++++++++++ arch/x86/kvm/svm/svm.c | 28 +-- arch/x86/kvm/x86.c | 162 ++++++++--------- 5 files changed, 394 insertions(+), 253 deletions(-)
-- 2.26.3
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