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Message-Id: <20220621150902.46126-1-mlevitsk@redhat.com>
Date: Tue, 21 Jun 2022 18:08:51 +0300
From: Maxim Levitsky <mlevitsk@...hat.com>
To: kvm@...r.kernel.org
Cc: Sean Christopherson <seanjc@...gle.com>, x86@...nel.org,
Kees Cook <keescook@...omium.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
Borislav Petkov <bp@...en8.de>, Joerg Roedel <joro@...tes.org>,
Ingo Molnar <mingo@...hat.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH v2 00/11] SMM emulation and interrupt shadow fixes
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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