* Peter Maydell (peter.mayd...@linaro.org) wrote:
> On Thu, 18 Mar 2021 at 10:25, Dr. David Alan Gilbert
> <dgilb...@redhat.com> wrote:
> > Oh yes, just:
> >
> > diff --git a/migration/ram.c b/migration/ram.c
> > index 52537f14ac..a7269955b5 100644
> > --- a/migration/ram.c
> > +++ b/migration/ram.c
> > @@ -81,6 +81,8 @@
> > /* 0x80 is reserved in migration.h start with 0x100 next */
> > #define RAM_SAVE_FLAG_COMPRESS_PAGE 0x100
> >
> > +#define RAM_SAVE_FLAG__MAX RAM_SAVE_FLAG_COMPRESS_PAGE
> > +
> > static inline bool is_zero_range(uint8_t *p, uint64_t size)
> > {
> > return buffer_is_zero(p, size);
> > @@ -4090,5 +4092,6 @@ static SaveVMHandlers savevm_ram_handlers = {
> > void ram_mig_init(void)
> > {
> > qemu_mutex_init(&XBZRLE.lock);
> > + QEMU_BUILD_BUG_ON(RAM_SAVE_FLAG__MAX >= (1 << TARGET_PAGE_BITS_MIN));
> > register_savevm_live("ram", 0, 4, &savevm_ram_handlers, &ram_state);
> > }
> >
> >
> > works; lets keep that in mind somewhere after Michael fixes AVR.
>
> You don't have a great deal of headroom even after getting AVR
> to change, by the way -- TARGET_PAGE_BITS_MIN for Arm is 10.
> So you might want to think about ways to eg reclaim usage of
> that "obsolete, not used" RAM_SAVE_FLAG_FULL bit.
Yep, I've been warning anyone who adds one for ages
> Also, what does the
> /* 0x80 is reserved in migration.h start with 0x100 next */
> comment refer to? migration.h has no instances of "RAM_SAVE"
> or 0x80 or 1 << 7...
It looks like it got moved to qemu-file.h a few years ago
as RAM_SAVE_FLAG_HOOK.
Dave
> thanks
> -- PMM
>
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
