This patchset implements the Arm architectural features ARMv8.3-RCPC and ARMv8.4-RCPC. These provide a handful of new load and store instructions which have "LoadAcquirePC" semantics. These are slightly weaker than standard "LoadAcquire", so we choose to implement them in QEMU as LoadAcquire.
Patch 1 is a trivial fix to the PMU isar function which I managed to cut-n-paste with the wrong FIELD_EX* macro. I've tested these using risu against an Arm AEM FVP model: this doesn't do anything to test the memory barrier semantics but does work as a check that the decode is correct and that the various signed/unsigned/extend/etc operations are being done correctly. thanks -- PMM Peter Maydell (3): target/arm: Fix wrong use of FIELD_EX32 on ID_AA64DFR0 target/arm: Implement v8.3-RCPC target/arm: Implement v8.4-RCPC target/arm/cpu.h | 14 ++++- linux-user/elfload.c | 2 + target/arm/cpu64.c | 1 + target/arm/translate-a64.c | 114 +++++++++++++++++++++++++++++++++++++ 4 files changed, 129 insertions(+), 2 deletions(-) -- 2.20.1
