On Thu, May 08, 2008 at 04:15:03PM +0900, Isaku Yamahata wrote:
> On Thu, May 08, 2008 at 08:57:28AM +1000, Simon Horman wrote:
> > On Wed, May 07, 2008 at 05:31:21PM +0900, Isaku Yamahata wrote:
> > > Hi Simon-san.
> > > I guess that this patch isn't copmiled as inteneded.
> > > With the VHPT_ENABLED patch which make sure VHPT_ENABLED always
> > > defined to 1 or 0, I got compilation errors.
> > >
> > >
> > > [IA64] compilation fix with VHPT_ENABLED=1
> > >
> > > Enabling VHPT_ENABLED=1 results in compilation error in vmx_phy_mode.c
> > > and vmx_vcpu.c. This patch fixes them.
> > > vmx_phy_mode.c: In function 'vmx_load_all_rr':
> > > vmx_phy_mode.c:175: warning: implicit declaration of function
> > > 'vcpu_vhpt_maddr'
> > > vmx_phy_mode.c:175: error: 'v' undeclared (first use in this function)
> > > vmx_phy_mode.c:175: error: (Each undeclared identifier is reported only
> > > once
> > > vmx_phy_mode.c:175: error: for each function it appears in.)
> > > PATCHNAME: compilation_fix_with_vhpt_enabled
> > >
> > > Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
> >
> > Thanks Yamahata-san,
> >
> > that looks correct to me. I have a related fix to the same code which
> > alters the value that is tracked. Do you think this is correct:
>
> The patch itself looks correct.
>
> Related to the patch, do you mean that another #if VHPT_ENABLED in
> xen/arch/ia64/linux-xen/mca_asm.S should be removed and that
> the around code should be patched somehow?
I suspect that your change below is correct. But I am not competely
sure. I'll try testing it a bit and see if anything good/bad happens.
> diff -r 07e367fbd2b2 xen/arch/ia64/linux-xen/mca_asm.S
> --- a/xen/arch/ia64/linux-xen/mca_asm.S Wed May 07 17:14:08 2008 +0900
> +++ b/xen/arch/ia64/linux-xen/mca_asm.S Thu May 08 16:06:12 2008 +0900
> @@ -519,8 +488,9 @@
> #ifdef XEN
> .reload_vhpt:
> // 5. VHPT
> -#if VHPT_ENABLED
> - GET_VA_VCPU_VHPT_MADDR(r2,r3);;
> + GET_THIS_PADDR(r1, inserted_vhpt);;
> + cmp.eq p7,p0=r2,r0
> +(p7) br.cond.sptk .overlap_vhpt // vhpt isn't mapped.
>
> // avoid overlapping with stack TR
> shr.u r17=r2,IA64_GRANULE_SHIFT
> @@ -550,7 +520,6 @@
> srlz.d
> ;;
> .overlap_vhpt:
> -#endif
> #endif
> br.sptk.many done_tlb_purge_and_reload
> err:
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