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CPU watchpoints can be use by non-TCG accelerators. KVM uses them: $ git grep CPUWatchpoint|fgrep kvm target/arm/kvm64.c:1558: CPUWatchpoint *wp = find_hw_watchpoint(cs, debug_exit->far); target/i386/kvm/kvm.c:5216:static CPUWatchpoint hw_watchpoint; target/ppc/kvm.c:443:static CPUWatchpoint hw_watchpoint; target/s390x/kvm/kvm.c:139:static CPUWatchpoint hw_watchpoint; See for example commite4482ab7e3("target-arm: kvm - add support for HW assisted debug"): This adds basic support for HW assisted debug. The ioctl interface to KVM allows us to pass an implementation defined number of break and watch point registers. [...] This partially reverts commit2609ec2868. Fixes:2609ec2868("softmmu: Extract watchpoint API from physmem.c") Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230328173117.15226-4-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>