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target/arm: Implement SEL2 physical and virtual timers

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When FEAT_SEL2 was implemented the SEL2 timers were missed. This
shows up when building the latest Hafnium with SPMC_AT_EL=2. The
actual implementation utilises the same logic as the rest of the
timers so all we need to do is:

  - define the timers and their access functions
  - conditionally add the correct system registers
  - create a new accessfn as the rules are subtly different to the
    existing secure timer

Fixes: e9152ee91c (target/arm: add ARMv8.4-SEL2 system registers)
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250204125009.2281315-7-peter.maydell@linaro.org
Cc: qemu-stable@nongnu.org
Cc: Andrei Homescu <ahomescu@google.com>
Cc: Arve Hjønnevåg <arve@google.com>
Cc: Rémi Denis-Courmont <remi.denis.courmont@huawei.com>
[PMM: CP_ACCESS_TRAP_UNCATEGORIZED -> CP_ACCESS_UNDEFINED;
 offset logic now in gt_{indirect,direct}_access_timer_offset() ]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alex Bennée 2025-03-07 10:08:21 +00:00 • committed by Peter Maydell
parent 02c648a0a1
commit f9f99d7ca5
5 changed files with 174 additions and 1 deletions
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4
target/arm/cpu.c
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@ -2069,6 +2069,10 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
arm_gt_stimer_cb, cpu);
cpu->gt_timer[GTIMER_HYPVIRT] = timer_new(QEMU_CLOCK_VIRTUAL, scale,
arm_gt_hvtimer_cb, cpu);
cpu->gt_timer[GTIMER_S_EL2_PHYS] = timer_new(QEMU_CLOCK_VIRTUAL, scale,
arm_gt_sel2timer_cb, cpu);
cpu->gt_timer[GTIMER_S_EL2_VIRT] = timer_new(QEMU_CLOCK_VIRTUAL, scale,
arm_gt_sel2vtimer_cb, cpu);
}
#endif