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AJvYcCX5FEhWaXXztdPIX0rVcKVN79VnRcXXpbESbek2Z0P0Y1sff/OkEI0qkT7Hvp/c8Gv1rno/xAU68xVYTHw=@vger.kernel.org X-Gm-Message-State: AOJu0YzWxTo/lL5ZDjG/0Jn00x9VN8u56fCT+D+EOdQ6cMZllYc2yPEU kf3FtrcOrHkkFNa5Krq3M/aTbLEF2dBY/fZC4C7SVCcRTMB9Lj6s78Kr1K28GyOcdZ9XvPNuCVG jxTHKRH94tw== X-Google-Smtp-Source: AGHT+IEPQay9Y8CPc4NCAf9wmXyxCMeYXXSRQnwHxxS/TYx9u0H9ZZe4g9YLXll0aeY364hkPCkt35VntGEZQg== X-Received: from wmma26.prod.google.com ([2002:a05:600c:225a:b0:434:f299:5633]) (user=smostafa job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1c82:b0:434:a815:2b57 with SMTP id 5b1f17b1804b1-4362286399fmr35483095e9.20.1734026763212; Thu, 12 Dec 2024 10:06:03 -0800 (PST) Date: Thu, 12 Dec 2024 18:04:02 +0000 In-Reply-To: <20241212180423.1578358-1-smostafa@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241212180423.1578358-1-smostafa@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20241212180423.1578358-39-smostafa@google.com> Subject: [RFC PATCH v2 38/58] iommu/io-pgtable-arm: Add post table walker callback From: Mostafa Saleh To: iommu@lists.linux.dev, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, will@kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, robdclark@gmail.com, joro@8bytes.org, robin.murphy@arm.com, jean-philippe@linaro.org, jgg@ziepe.ca, nicolinc@nvidia.com, vdonnefort@google.com, qperret@google.com, tabba@google.com, danielmentz@google.com, tzukui@google.com, Mostafa Saleh Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a callback for postable, this would be used by pKVM to cleanup tables next. Signed-off-by: Mostafa Saleh --- drivers/iommu/io-pgtable-arm-common.c | 15 ++++++++++++++- include/linux/io-pgtable-arm.h | 2 ++ include/linux/io-pgtable.h | 2 ++ 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/io-pgtable-arm-common.c b/drivers/iommu/io-pgtab= le-arm-common.c index 4fc0b03494e3..076240eaec19 100644 --- a/drivers/iommu/io-pgtable-arm-common.c +++ b/drivers/iommu/io-pgtable-arm-common.c @@ -523,6 +523,13 @@ static int visit_pgtable_walk(struct io_pgtable_walk_d= ata *walk_data, int lvl, return 0; } =20 +static void visit_pgtable_post_table(struct arm_lpae_io_pgtable_walk_data = *data, + arm_lpae_iopte *ptep, int lvl) +{ + if (data->visit_post_table) + data->visit_post_table(data, ptep, lvl); +} + static int arm_lpae_pgtable_walk(struct io_pgtable_ops *ops, unsigned long= iova, size_t size, struct io_pgtable_walk_common *walker) { @@ -530,6 +537,7 @@ static int arm_lpae_pgtable_walk(struct io_pgtable_ops = *ops, unsigned long iova, struct io_pgtable_walk_data walk_data =3D { .data =3D walker, .visit =3D visit_pgtable_walk, + .visit_post_table =3D visit_pgtable_post_table, .addr =3D iova, .end =3D iova + size, }; @@ -562,7 +570,12 @@ static int io_pgtable_visit(struct arm_lpae_io_pgtable= *data, } =20 ptep =3D iopte_deref(pte, data); - return __arm_lpae_iopte_walk(data, walk_data, ptep, lvl + 1); + ret =3D __arm_lpae_iopte_walk(data, walk_data, ptep, lvl + 1); + + if (walk_data->visit_post_table) + walk_data->visit_post_table(data, ptep, lvl); + + return ret; } =20 static int __arm_lpae_iopte_walk(struct arm_lpae_io_pgtable *data, diff --git a/include/linux/io-pgtable-arm.h b/include/linux/io-pgtable-arm.h index 9e5878c37d78..c00eb0cb7e43 100644 --- a/include/linux/io-pgtable-arm.h +++ b/include/linux/io-pgtable-arm.h @@ -21,6 +21,8 @@ struct io_pgtable_walk_data { struct io_pgtable_walk_common *data; int (*visit)(struct io_pgtable_walk_data *walk_data, int lvl, arm_lpae_iopte *ptep, size_t size); + void (*visit_post_table)(struct arm_lpae_io_pgtable_walk_data *data, + arm_lpae_iopte *ptep, int lvl); unsigned long flags; u64 addr; const u64 end; diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index da50e17b0177..86226571cdb8 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -193,6 +193,8 @@ struct arm_lpae_io_pgtable_walk_data { u64 ptes[4]; int level; void *cookie; + void (*visit_post_table)(struct arm_lpae_io_pgtable_walk_data *data, + arm_lpae_iopte *ptep, int lvl); }; =20 /** --=20 2.47.0.338.g60cca15819-goog