On 06.03.23 14:21, David Hildenbrand wrote:
On 03.03.23 18:19, Paolo Bonzini wrote:
On ARM, seqcst loads and stores (which QEMU does not use) are compiled
respectively as LDAR and STLR instructions. Even though STLR is also
used for store-release operations, STLR followed by LDAR provides
store
On 03.03.23 18:19, Paolo Bonzini wrote:
On ARM, seqcst loads and stores (which QEMU does not use) are compiled
respectively as LDAR and STLR instructions. Even though STLR is also
used for store-release operations, STLR followed by LDAR provides
store-against-load ordering, which is stronger tha
Il dom 5 mar 2023, 19:57 Richard Henderson
ha scritto:
> On 3/3/23 09:19, Paolo Bonzini wrote:
> > This nasty difference between Linux and C11 read-modify-write operations
> > has already caused issues in util/async.c and more are being found.
> > Provide something similar to Linux smp_mb__before
On 3/3/23 09:19, Paolo Bonzini wrote:
This nasty difference between Linux and C11 read-modify-write operations
has already caused issues in util/async.c and more are being found.
Provide something similar to Linux smp_mb__before/after_atomic(); this
has the double function of documenting clearly
On ARM, seqcst loads and stores (which QEMU does not use) are compiled
respectively as LDAR and STLR instructions. Even though STLR is also
used for store-release operations, STLR followed by LDAR provides
store-against-load ordering, which is stronger than a store-release.
Compare this to ARMv7,
