Re: [PATCH v14 4/4] target/ppc: trigger PERFM EBBs from power8-pmu.c

[Richard Henderson <richard.henderson@linaro.org>]

On 2/25/22 00:11, Daniel Henrique Barboza wrote:
> This patch adds the EBB exception support that are triggered by
> Performance Monitor alerts. This happens when a Performance Monitor
> alert occurs and MMCR0_EBE, BESCR_PME and BESCR_GE are set.
> 
> fire_PMC_interrupt() will execute the raise_ebb_perfm_exception() helper
> which will check for MMCR0_EBE, BESCR_PME and BESCR_GE bits. If all bits
> are set, do_ebb() will attempt to trigger a PERFM EBB event.
> 
> If the EBB facility is enabled in both FSCR and HFSCR we consider that
> the EBB is valid and set BESCR_PMEO. After that, if we're running in
> problem state, fire a POWERPC_EXCP_PERM_EBB immediately. Otherwise we'll
> queue a PPC_INTERRUPT_EBB.
> 
> Signed-off-by: Daniel Henrique Barboza<danielhb413@gmail.com>
> ---
>   target/ppc/cpu.h         |  5 +++++
>   target/ppc/excp_helper.c | 48 ++++++++++++++++++++++++++++++++++++++++
>   target/ppc/power8-pmu.c  |  3 +--
>   3 files changed, 54 insertions(+), 2 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~