On Mon, Jul 01, 2024 at 11:02:38AM +0000, Mostafa Saleh wrote:
> Previously, to check if faults are enabled, it was sufficient to check
> the current stage of translation and check the corresponding
> record_faults flag.
>
> However, with nesting, it is possible for stage-1 (nested) translation
> to trigger a stage-2 fault, so we check SMMUPTWEventInfo as it would
> have the correct stage set from the page table walk.
>
> Signed-off-by: Mostafa Saleh <smost...@google.com>
> ---
> hw/arm/smmuv3.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
> index 36eb6f514a..6c18dc0acf 100644
> --- a/hw/arm/smmuv3.c
> +++ b/hw/arm/smmuv3.c
> @@ -34,9 +34,10 @@
> #include "smmuv3-internal.h"
> #include "smmu-internal.h"
>
> -#define PTW_RECORD_FAULT(cfg) (((cfg)->stage == SMMU_STAGE_1) ? \
> - (cfg)->record_faults : \
> - (cfg)->s2cfg.record_faults)
> +#define PTW_RECORD_FAULT(ptw_info, cfg) (((ptw_info).stage == SMMU_STAGE_1
> && \
> + (cfg)->record_faults) || \
> + ((ptw_info).stage == SMMU_STAGE_2 &&
> \
> + (cfg)->s2cfg.record_faults))
I guess this could be simplified as "(info.stage == STAGE_1) ? s1cfg : s2cfg"
Anyway:
Reviewed-by: Jean-Philippe Brucker <jean-phili...@linaro.org>
>
> /**
> * smmuv3_trigger_irq - pulse @irq if enabled and update
> @@ -919,7 +920,7 @@ static SMMUTranslationStatus
> smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
> event->u.f_walk_eabt.addr2 = ptw_info.addr;
> break;
> case SMMU_PTW_ERR_TRANSLATION:
> - if (PTW_RECORD_FAULT(cfg)) {
> + if (PTW_RECORD_FAULT(ptw_info, cfg)) {
> event->type = SMMU_EVT_F_TRANSLATION;
> event->u.f_translation.addr = addr;
> event->u.f_translation.addr2 = ptw_info.addr;
> @@ -928,7 +929,7 @@ static SMMUTranslationStatus
> smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
> }
> break;
> case SMMU_PTW_ERR_ADDR_SIZE:
> - if (PTW_RECORD_FAULT(cfg)) {
> + if (PTW_RECORD_FAULT(ptw_info, cfg)) {
> event->type = SMMU_EVT_F_ADDR_SIZE;
> event->u.f_addr_size.addr = addr;
> event->u.f_addr_size.addr2 = ptw_info.addr;
> @@ -937,7 +938,7 @@ static SMMUTranslationStatus
> smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
> }
> break;
> case SMMU_PTW_ERR_ACCESS:
> - if (PTW_RECORD_FAULT(cfg)) {
> + if (PTW_RECORD_FAULT(ptw_info, cfg)) {
> event->type = SMMU_EVT_F_ACCESS;
> event->u.f_access.addr = addr;
> event->u.f_access.addr2 = ptw_info.addr;
> @@ -946,7 +947,7 @@ static SMMUTranslationStatus
> smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
> }
> break;
> case SMMU_PTW_ERR_PERMISSION:
> - if (PTW_RECORD_FAULT(cfg)) {
> + if (PTW_RECORD_FAULT(ptw_info, cfg)) {
> event->type = SMMU_EVT_F_PERMISSION;
> event->u.f_permission.addr = addr;
> event->u.f_permission.addr2 = ptw_info.addr;
> --
> 2.45.2.803.g4e1b14247a-goog
>
