On 2/11/20 5:52 AM, Joerg Roedel wrote:
> Implement a handler for #VC exceptions caused by RDMSR/WRMSR
> instructions.
As a general comment on all of these event handlers: Why do we bother
having the hypercalls in the interrupt handler as opposed to just
calling them directly. What you have is:
wrmsr()
-> #VC exception
hcall()
But we could make our rd/wrmsr() wrappers just do:
if (running_on_sev_es())
hcall(HCALL_MSR_WHATEVER...)
else
wrmsr()
and then we don't have any of the nastiness of exception handling.
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