On 06/28/2016 10:39 AM, Paolo Bonzini wrote: > The maximum amount of storage that can be addressed by the m25p80 command > set is 4 GiB. However, cur_addr is currently a 64-bit integer. To avoid > further problems related to sign extension of signed 32-bit integer > expressions, change cur_addr to a 32 bit integer. Preserve migration > format by adding a dummy 4-byte field in place of the (big-endian) > high four bytes in the formerly 64-bit cur_addr field.
I do not think that migration ever worked before. did it ? > Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> Reviewed-by: Cédric Le Goater <c...@kaod.org> > --- > hw/block/m25p80.c | 15 ++++++++------- > 1 file changed, 8 insertions(+), 7 deletions(-) > > diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c > index 76a9bcf..7668b22 100644 > --- a/hw/block/m25p80.c > +++ b/hw/block/m25p80.c > @@ -389,7 +389,7 @@ typedef struct Flash { > uint32_t pos; > uint8_t needed_bytes; > uint8_t cmd_in_progress; > - uint64_t cur_addr; > + uint32_t cur_addr; > uint32_t nonvolatile_cfg; > /* Configuration register for Macronix */ > uint32_t volatile_cfg; > @@ -535,9 +535,9 @@ static inline void flash_sync_dirty(Flash *s, int64_t > newpage) > } > > static inline > -void flash_write8(Flash *s, uint64_t addr, uint8_t data) > +void flash_write8(Flash *s, uint32_t addr, uint8_t data) > { > - int64_t page = addr / s->pi->page_size; > + uint32_t page = addr / s->pi->page_size; > uint8_t prev = s->storage[s->cur_addr]; This routine needs a cleanup. It takes an 'addr' parameter (it is called with s->cur_addr) and uses s->cur_addr at the same time. C. > if (!s->write_enable) { > @@ -545,7 +545,7 @@ void flash_write8(Flash *s, uint64_t addr, uint8_t data) > } > > if ((prev ^ data) & data) { > - DB_PRINT_L(1, "programming zero to one! addr=%" PRIx64 " %" PRIx8 > + DB_PRINT_L(1, "programming zero to one! addr=%" PRIx32 " %" PRIx8 > " -> %" PRIx8 "\n", addr, prev, data); > } > > @@ -1094,7 +1094,7 @@ static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t > tx) > switch (s->state) { > > case STATE_PAGE_PROGRAM: > - DB_PRINT_L(1, "page program cur_addr=%#" PRIx64 " data=%" PRIx8 "\n", > + DB_PRINT_L(1, "page program cur_addr=%#" PRIx32 " data=%" PRIx8 "\n", > s->cur_addr, (uint8_t)tx); > flash_write8(s, s->cur_addr, (uint8_t)tx); > s->cur_addr = (s->cur_addr + 1) & (s->size - 1); > @@ -1102,7 +1102,7 @@ static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t > tx) > > case STATE_READ: > r = s->storage[s->cur_addr]; > - DB_PRINT_L(1, "READ 0x%" PRIx64 "=%" PRIx8 "\n", s->cur_addr, > + DB_PRINT_L(1, "READ 0x%" PRIx32 "=%" PRIx8 "\n", s->cur_addr, > (uint8_t)r); > s->cur_addr = (s->cur_addr + 1) & (s->size - 1); > break; > @@ -1199,7 +1199,8 @@ static const VMStateDescription vmstate_m25p80 = { > VMSTATE_UINT32(pos, Flash), > VMSTATE_UINT8(needed_bytes, Flash), > VMSTATE_UINT8(cmd_in_progress, Flash), > - VMSTATE_UINT64(cur_addr, Flash), > + VMSTATE_UNUSED(4), > + VMSTATE_UINT32(cur_addr, Flash), > VMSTATE_BOOL(write_enable, Flash), > VMSTATE_BOOL_V(reset_enable, Flash, 2), > VMSTATE_UINT8_V(ear, Flash, 2), >