KVM: VMX: Pass "launched" directly to the vCPU-run asm blob

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...and remove struct vcpu_vmx's temporary __launched variable.

Eliminating __launched is a bonus, the real motivation is to get to the
point where the only reference to struct vcpu_vmx in the asm code is
to vcpu.arch.regs, which will simplify moving the blob to a proper asm
file.  Note that also means this approach is deliberately different than
what is used in nested_vmx_check_vmentry_hw().

Use BL as it is a callee-save register in both 32-bit and 64-bit ABIs,
i.e. it can't be modified by vmx_update_host_rsp(), to avoid having to
temporarily save/restore the launched flag.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

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Sean Christopherson 2019-01-25 07:41:05 -08:00 • committed by Paolo Bonzini

parent c09b03eb7f

commit c9afc58cc3

2 changed files with 7 additions and 8 deletions

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arch/x86/kvm/vmx/vmx.c

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2

arch/x86/kvm/vmx/vmx.h

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