KVM: x86: Add an emulation type to handle completion of user exits

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The next patch would use kvm_emulate_instruction() with
EMULTYPE_SKIP in complete_userspace_io callback to fix a
problem in msr access emulation. However, EMULTYPE_SKIP
only updates RIP, more things like updating interruptibility
state and injecting single-step #DBs would be done in the
callback. Since the emulator also does those things after
x86_emulate_insn(), add a new emulation type to pair with
EMULTYPE_SKIP to do those things for completion of user exits
within the emulator.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Hou Wenlong <houwenlong93@linux.alibaba.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <8f8c8e268b65f31d55c2881a4b30670946ecfa0d.1635842679.git.houwenlong93@linux.alibaba.com>

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Hou Wenlong 2021-11-02 17:15:30 +08:00 • committed by Paolo Bonzini

parent 5e854864ee

commit 906fa90416

2 changed files with 17 additions and 4 deletions

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8

arch/x86/include/asm/kvm_host.h

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13

arch/x86/kvm/x86.c

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