Re: [PATCH v3 0/2] arm64: ptdump flush fixes

[Will Deacon]

On Sun, Aug 23, 2026 at 11:13:15AM +0100, Marc Zyngier wrote:
> On Fri, 14 Aug 2026 23:24:56 +0100,
> Wei-Lin Chang <weilin.chang@xxxxxxx> wrote:
> > 
> > Hi,
> > 
> > This series fixes two problems around ptdumps:
> > 
> > 1. note_page_flush(), which flushes out the last row of ptdumps, does
> >    not account for address spaces that have IA < 64. Other than making
> >    the last region extremely huge, the attributes of the last region
> >    within the address spaces appear to extend all the way to 1 << 64.
> > 
> > 2. KVM/arm64's stage-2 ptdump missed calling note_page_flush().
> > 
> > To address Will's comment [1], I have created an end_address field for
> > struct ptdump_pg_state, and initialized it with the end address of the
> > ptdumps. It follows the same convention as the last range->end:
> > exclusive end, except for the case where the address space ends at
> > 1 << 64. In that case it is set as ULONG_MAX.
> > 
> > Caching the end address avoids duplicating the range iteration in
> > note_page_flush(), at the cost of duplicating state in ptdump_pg_state.
> > 
> > Series is based on v7.2-rc5.
> 
> Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
> 
> Will, if you're OK with patch #1, do you want the whole thing to go
> via the arm64 or the kvmarm tree?

I can pick 'em both up, as I already have some other fixes on my radar
for -rc1.

Cheers,

Will