Re: [GIT PULL][RESEND #2] KVM Updates for 2.6.23-rc1

From: H. Peter Anvin
Date: Tue Jul 17 2007 - 15:07:18 EST


S.ÃaÄlar Onur wrote:
>
> If i'm not wrong X86_CMPXCHG64 depends on CONFIG_X86_PAE which depends on
> HIGHMEM64 and again if i'm not wrong this means distributions who wants to
> provide KVM must enable CONFIG_X86_PAE and CONFIG_HIGHMEM64G from now on?
>

X86_PAE should depend on X86_CMPXCHG64, not the other way around.

I asked Andi Kleen about this on IRC, and he said:

<freitag> the reason was that i didn't want to hack everybody's magic
MSRs into the old verify_cpu.S

verify_cpu.S is dead on i386 (replaced by arch/i386/boot/cpucheck.c)
which does have the flags enable MSR tweaks; it is still being used for
APs on x86-64. However, in the meantime it should be safe to remove
this dependency from i386.

-hpa

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