Re: [PATCH] Re: UP APIC reenabling vs. cpu type detection ordering

2001-02-08 Thread Maciej W. Rozycki
On Thu, 8 Feb 2001, Mikael Pettersson wrote: > No, poking into MSRs not explicitly defined on the current CPU is > inherently unsafe. I have several x86 CPU data sheets here in front > of me which say the same thing: "Don't write to undocumented MSRs." Your point is right -- the problem are not

Re: [PATCH] Re: UP APIC reenabling vs. cpu type detection ordering

2001-02-07 Thread H. Peter Anvin
Mikael Pettersson wrote: > > H. Peter Anvin wrote: > > >"Maciej W. Rozycki" wrote: > >... > >> It might be viable just to delete the test altogether, though and just > >> trap #GP(0) on the MSR access. For the sake of simplicity. If a problem > >> with a system ever arizes, we may handle it t

[PATCH] Re: UP APIC reenabling vs. cpu type detection ordering

2001-02-07 Thread Mikael Pettersson
H. Peter Anvin wrote: >"Maciej W. Rozycki" wrote: >... >> It might be viable just to delete the test altogether, though and just >> trap #GP(0) on the MSR access. For the sake of simplicity. If a problem >> with a system ever arizes, we may handle it then. >> >> Note that we still have to ch