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Wed, 02 Sep 2026 03:51:10 -0700 (PDT) Date: Wed, 2 Sep 2026 11:47:05 +0100 In-Reply-To: <20260902104712.2399797-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20260902104712.2399797-1-vdonnefort@google.com> X-Mailer: git-send-email 2.55.0.970.g62bdec98f9-goog Message-ID: <20260902104712.2399797-4-vdonnefort@google.com> Subject: [PATCH v9 03/10] set_memory.h: Introduce can_set_direct_map_range() To: catalin.marinas@arm.com, will@kernel.org, rppt@kernel.org, akpm@linux-foundation.org, sudeep.holla@kernel.org, jenswi@kernel.org, robh@kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Action: no action X-Spamd-Result: default: False [-2.30 / 15.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; MV_CASE(0.50)[]; DMARC_POLICY_ALLOW(-0.50)[google.com,reject]; FORGED_SENDER(0.30)[vdonnefort@google.com,3nv-xagokblkm4fee56fik7ff7c5.3fdfg-k55c9jkj.kiljk5469idn1i5.fi7@flex--vdonnefort.bounces.google.com]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17:c]; R_DKIM_ALLOW(-0.20)[google.com:s=20251104]; 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no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-op-tee.lists.trustedfirmware.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: mark.rutland@arm.com, sumit.garg@kernel.org, ardb@kernel.org, thierry.reding@kernel.org, david@kernel.org, danielmentz@google.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, op-tee@lists.trustedfirmware.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Vincent Donnefort X-Mailman-Version: 3.3.5 Precedence: list List-Id: Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Vincent Donnefort via OP-TEE Reply-To: Vincent Donnefort While can_set_direct_map() tells whether the direct map can be modified globally, can_set_direct_map_range() checks if a specific range can be modified. e.g. if mapped at PTE-level. Signed-off-by: Vincent Donnefort diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h index 3030d9245f5a..88175c3fa751 100644 --- a/include/linux/set_memory.h +++ b/include/linux/set_memory.h @@ -44,6 +44,12 @@ static inline bool kernel_page_present(struct page *page) { return true; } + +static inline bool can_set_direct_map_range(struct page *page, + unsigned long nr_pages) +{ + return false; +} #else /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */ /* * Some architectures, e.g. ARM64 can disable direct map modifications at @@ -56,6 +62,14 @@ static inline bool can_set_direct_map(void) } #define can_set_direct_map can_set_direct_map #endif + +#ifndef can_set_direct_map_range +static inline bool can_set_direct_map_range(struct page *page, unsigned long nr_pages) +{ + return can_set_direct_map(); +} +#define can_set_direct_map_range can_set_direct_map_range +#endif #endif /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */ #ifdef CONFIG_X86_64 -- 2.55.0.970.g62bdec98f9-goog