Re: [PATCH 7.1.y] drm/xe/rtp: Maintain OA whitelists separately

["Dixit, Ashutosh" <ashutosh.dixit@intel.com>]

On Mon, 03 Aug 2026 16:10:37 -0700, Dixit, Ashutosh wrote:
>
> On Fri, 31 Jul 2026 17:45:26 -0700, Sasha Levin wrote:
> >
>
> Hi Sasha/Greg,
>
> The patch below is correct. However, because you will encounter conflicts
> in other patches of this series too, I have backported the entire series
> for linux-7.1.y here:
>
> https://lore.kernel.org/stable/20260803230136.3270230-1-ashutosh.dixit@intel.com/
>
> Will it be possible to apply the patches from the above link instead?
> Since it will save us some work.
>
> I will also send backports of this series to linux-6.12.y and linux-6.18.y.

Ports to linux-6.12.y and linux-6.18.y are here:

https://lore.kernel.org/stable/20260803233346.3277427-1-ashutosh.dixit@intel.com/
https://lore.kernel.org/stable/20260803232608.3276045-1-ashutosh.dixit@intel.com/

> Sorry, I am not too sure of the process to follow here. So if it needs to
> be done differently please let me know.
>
> Thanks.
> --
> Ashutosh
>
> > From: Ashutosh Dixit <ashutosh.dixit@intel.com>
> >
> > [ Upstream commit 31e2437561621b4867c08efc890bf629d017df03 ]
> >
> > OA registers are dynamically whitelisted (and again dewhitelisted) on OA
> > stream open/close. Maintaining OA whitelists separately from non-OA
> > register whitlists simplifies this management of OA register
> > whitelisting/dewhitelisting.
> >
> > Fixes: 828a8eaf37c3 ("drm/xe/oa: Add MMIO trigger support")
> > Cc: stable@vger.kernel.org # v6.12+
> > Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
> > Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
> > Link: https://patch.msgid.link/20260615224227.34880-3-ashutosh.dixit@intel.com
> > (cherry picked from commit c478244a9e2d14b3f1f92e8bd293919e554622a5)
> > Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> > [ adapted RTP table from struct wrapper macro `XE_RTP_TABLE_SR()` back to plain `struct xe_rtp_entry_sr[]` array and restored the 5-arg `xe_rtp_process_to_sr()` call with `ARRAY_SIZE()` ]
> > Signed-off-by: Sasha Levin <sashal@kernel.org>
> > ---
> >  drivers/gpu/drm/xe/xe_gt_debugfs.c      | 4 +++-
> >  drivers/gpu/drm/xe/xe_hw_engine.c       | 2 ++
> >  drivers/gpu/drm/xe/xe_hw_engine_types.h | 8 ++++++++
> >  drivers/gpu/drm/xe/xe_reg_whitelist.c   | 6 ++++++
> >  4 files changed, 19 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/xe/xe_gt_debugfs.c b/drivers/gpu/drm/xe/xe_gt_debugfs.c
> > index f45306308cd6..c38bcacb27e4 100644
> > --- a/drivers/gpu/drm/xe/xe_gt_debugfs.c
> > +++ b/drivers/gpu/drm/xe/xe_gt_debugfs.c
> > @@ -149,8 +149,10 @@ static int register_save_restore(struct xe_gt *gt, struct drm_printer *p)
> >	drm_printf(p, "\n");
> >
> >	drm_printf(p, "Whitelist\n");
> > -	for_each_hw_engine(hwe, gt, id)
> > +	for_each_hw_engine(hwe, gt, id) {
> >		xe_reg_whitelist_dump(&hwe->reg_whitelist, p);
> > +		xe_reg_whitelist_dump(&hwe->oa_whitelist, p);
> > +	}
> >
> >	return 0;
> >  }
> > diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
> > index a7441a66e94c..b5a869c720af 100644
> > --- a/drivers/gpu/drm/xe/xe_hw_engine.c
> > +++ b/drivers/gpu/drm/xe/xe_hw_engine.c
> > @@ -575,6 +575,8 @@ static void hw_engine_init_early(struct xe_gt *gt, struct xe_hw_engine *hwe,
> >	hw_engine_setup_default_state(hwe);
> >
> >	xe_reg_sr_init(&hwe->reg_whitelist, hwe->name, gt_to_xe(gt));
> > +	xe_reg_sr_init(&hwe->oa_whitelist, hwe->name, gt_to_xe(gt));
> > +	xe_reg_sr_init(&hwe->oa_sr, hwe->name, gt_to_xe(gt));
> >	xe_reg_whitelist_process_engine(hwe);
> >  }
> >
> > diff --git a/drivers/gpu/drm/xe/xe_hw_engine_types.h b/drivers/gpu/drm/xe/xe_hw_engine_types.h
> > index e4191a7a2c31..04ca7545d22c 100644
> > --- a/drivers/gpu/drm/xe/xe_hw_engine_types.h
> > +++ b/drivers/gpu/drm/xe/xe_hw_engine_types.h
> > @@ -128,6 +128,14 @@ struct xe_hw_engine {
> >	 * @reg_whitelist: table with registers to be whitelisted
> >	 */
> >	struct xe_reg_sr reg_whitelist;
> > +	/**
> > +	 * @oa_whitelist: oa registers to be whitelisted
> > +	 */
> > +	struct xe_reg_sr oa_whitelist;
> > +	/**
> > +	 * @oa_sr: oa nonpriv whitelist registers, changed on oa stream open/close
> > +	 */
> > +	struct xe_reg_sr oa_sr;
> >	/**
> >	 * @reg_lrc: LRC workaround registers
> >	 */
> > diff --git a/drivers/gpu/drm/xe/xe_reg_whitelist.c b/drivers/gpu/drm/xe/xe_reg_whitelist.c
> > index 8cc313182968..089335b185d1 100644
> > --- a/drivers/gpu/drm/xe/xe_reg_whitelist.c
> > +++ b/drivers/gpu/drm/xe/xe_reg_whitelist.c
> > @@ -89,6 +89,9 @@ static const struct xe_rtp_entry_sr register_whitelist[] = {
> >			 WHITELIST(VFLSKPD,
> >				   RING_FORCE_TO_NONPRIV_ACCESS_RW))
> >	},
> > +};
> > +
> > +static const struct xe_rtp_entry_sr oa_whitelist[] = {
> >
> >  #define WHITELIST_OA_MMIO_TRG(trg, status, head) \
> >	WHITELIST(trg, RING_FORCE_TO_NONPRIV_ACCESS_RW), \
> > @@ -191,6 +194,9 @@ void xe_reg_whitelist_process_engine(struct xe_hw_engine *hwe)
> >	xe_rtp_process_to_sr(&ctx, register_whitelist, ARRAY_SIZE(register_whitelist),
> >			     &hwe->reg_whitelist, false);
> >	whitelist_apply_to_hwe(hwe);
> > +
> > +	xe_rtp_process_to_sr(&ctx, oa_whitelist, ARRAY_SIZE(oa_whitelist),
> > +			     &hwe->oa_whitelist, false);
> >  }
> >
> >  /**
> > --
> > 2.53.0
> >