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AKwUvBw5wrjBb2EF8/iaXC81CIWcJUWJGyD6OcauTYG9M2eHjwXUywz3LWu9hrLjUHoYCohdDEgtGbdCmnrG@vger.kernel.org X-Gm-Message-State: AFuF++m5TsuvF5GcfuTl3o7A/BWvKwuq9iuL9/sFSXKfcSkR79HIclbL p0XwWeNZhehKGysZJeq97W0shytWCBXYxrH+1l9BE9j1stit5XGKGYdFZXCLNZ3iN65KNJc13QO 6CFRsRfAirduuveDzXZS/1A== X-Received: from ejcz24.prod.google.com ([2002:a17:906:2718:b0:c25:3006:b1a0]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a17:907:807:b0:c15:f598:60c0 with SMTP id a640c23a62f3a-c25d544f52fmr257827266b.4.1788346270231; 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> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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() From: Vincent Donnefort 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 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 Content-Type: text/plain; charset="UTF-8" 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