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drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists

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Unconditionally whitelisting OA registers is a security violation. Set
RING_FORCE_TO_NONPRIV_DENY bit in OA nonpriv slots, so that OA registers
don't get whitelisted by default after probe, gt reset, resume and engine
reset.

Fixes: 828a8eaf37 ("drm/xe/oa: Add MMIO trigger support")
Cc: stable@vger.kernel.org # v6.12+
Suggested-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patch.msgid.link/20260615224227.34880-2-ashutosh.dixit@intel.com
This commit is contained in:
Ashutosh Dixit 2026-06-15 15:42:19 -07:00
parent 63dfab5786
commit 90511bdcfd
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/xe/xe_reg_whitelist.c
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@ -104,10 +104,12 @@ static const struct xe_rtp_table_sr register_whitelist = XE_RTP_TABLE_SR(
RING_FORCE_TO_NONPRIV_ACCESS_RW))
},
#define WHITELIST_DENY(r, f) WHITELIST(r, (f) | RING_FORCE_TO_NONPRIV_DENY)
#define WHITELIST_OA_MMIO_TRG(trg, status, head) \
WHITELIST(trg, RING_FORCE_TO_NONPRIV_ACCESS_RW), \
WHITELIST(status, RING_FORCE_TO_NONPRIV_ACCESS_RD), \
WHITELIST(head, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4)
WHITELIST_DENY(trg, RING_FORCE_TO_NONPRIV_ACCESS_RW), \
WHITELIST_DENY(status, RING_FORCE_TO_NONPRIV_ACCESS_RD), \
WHITELIST_DENY(head, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4)
#define WHITELIST_OAG_MMIO_TRG \
WHITELIST_OA_MMIO_TRG(OAG_MMIOTRIGGER, OAG_OASTATUS, OAG_OAHEADPTR)