On Fri, Sep 25, 2020 at 10:23:49PM +0200, Paolo Bonzini wrote: > On 25/09/20 18:54, Eduardo Habkost wrote: > > On Fri, Sep 25, 2020 at 04:42:26PM +0000, Strong, Beeman wrote: > >> LIP=0 will differ from LIP=1 behavior only when CSbase is non-zero, which > >> requires 32-bit code. In that case a LIP=0 implementation will provide > >> only the EIP offset from CSbase in IP packets (like TIP or FUP), while > >> LIP=1 implementation will provide the full LIP (CSbase + EIP offset). > >> > > Thanks. Is it possible to make KVM emulate LIP=0 behavior > > correctly on LIP=1 hosts, or vice versa? > > No, it's not possible. KVM doesn't have a say on what the processor > writes in the tracing packets.
Can KVM refuse to enable packet generation if CSbase is not zero and CPUID.(EAX=14H,ECX=0)[bit 31] seen by guest is different from host? -- Eduardo
