On Thu, Nov 15, 2012 at 12:25:45PM -0800, Will Auld wrote:
> In order to track who initiated the call (host or guest) to modify an msr
> value I have changed function call parameters along the call path. The
> specific change is to add a struct pointer parameter that points to (index,
> data, caller) information rather than having this information passed as
> individual parameters.
>
> The initial use for this capability is for updating the IA32_TSC_ADJUST
> msr while setting the tsc value. It is anticipated that this capability
> is useful other tasks.
>
> Signed-off-by: Will Auld <[email protected]>
> ---
> arch/x86/include/asm/kvm_host.h | 12 +++++++++---
> arch/x86/kvm/svm.c | 21 +++++++++++++++------
> arch/x86/kvm/vmx.c | 24 +++++++++++++++++-------
> arch/x86/kvm/x86.c | 23 +++++++++++++++++------
> arch/x86/kvm/x86.h | 2 +-
> 5 files changed, 59 insertions(+), 23 deletions(-)
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 42bce48..a3aac1c 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -883,9 +883,9 @@ EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
> * Returns 0 on success, non-0 otherwise.
> * Assumes vcpu_load() was already called.
> */
> -int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
> +int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
> {
> - return kvm_x86_ops->set_msr(vcpu, msr_index, data);
> + return kvm_x86_ops->set_msr(vcpu, msr);
> }
>
> /*
> @@ -4286,7 +4293,11 @@ static int emulator_get_msr(struct x86_emulate_ctxt
> *ctxt,
> static int emulator_set_msr(struct x86_emulate_ctxt *ctxt,
> u32 msr_index, u64 data)
> {
> - return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data);
> + struct msr_data msr;
> + msr.data = data;
> + msr.index = msr_index;
> + msr.host_initiated = true;
false, this is guest instruction emulation.
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