Not all of the breakpoint types are supported, but those that only examine contextidr are extended to support the new register. Backports commit e2a1a4616c86159eb4c07659a02fff8bb25d3729 from qemu
These routines are TCG specific. Backports commit 9dd5cca42448770a940fa2145f1ff18cdc7b01a9 from qemu