On Wed, 2018-05-30 at 10:31:22 UTC, Nicholas Piggin wrote:
> The stores to update the SLB shadow area must be made as they appear
> in the C code, so that the hypervisor does not see an entry with
> mismatched vsid and esid. Use WRITE_ONCE for this.
>
> GCC has been observed to elide the first
On Fri, Jun 01, 2018 at 08:52:27AM +1000, Nicholas Piggin wrote:
> On Fri, 01 Jun 2018 00:22:21 +1000
> Michael Ellerman wrote:
> > Nicholas Piggin writes:
> > > - p->save_area[index].esid = 0;
> > > - p->save_area[index].vsid = cpu_to_be64(mk_vsid_data(ea, ssize, flags));
> > > -
Nicholas Piggin writes:
> On Fri, 01 Jun 2018 00:22:21 +1000
> Michael Ellerman wrote:
>> Nicholas Piggin writes:
>> > The stores to update the SLB shadow area must be made as they appear
>> > in the C code, so that the hypervisor does not see an entry with
>> > mismatched vsid and esid. Use
On Fri, 01 Jun 2018 00:22:21 +1000
Michael Ellerman wrote:
> Nicholas Piggin writes:
>
> > The stores to update the SLB shadow area must be made as they appear
> > in the C code, so that the hypervisor does not see an entry with
> > mismatched vsid and esid. Use WRITE_ONCE for this.
> >
> >
Nicholas Piggin writes:
> The stores to update the SLB shadow area must be made as they appear
> in the C code, so that the hypervisor does not see an entry with
> mismatched vsid and esid. Use WRITE_ONCE for this.
>
> GCC has been observed to elide the first store to esid in the update,
> which
The stores to update the SLB shadow area must be made as they appear
in the C code, so that the hypervisor does not see an entry with
mismatched vsid and esid. Use WRITE_ONCE for this.
GCC has been observed to elide the first store to esid in the update,
which means that if the hypervisor
