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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Marek Szyprowski , Robin Murphy , Sumit Semwal , Benjamin Gaignard , Brian Starkey , John Stultz , "T.J. Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Catalin Marinas , Will Deacon Cc: Thierry Reding , devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev, linaro-mm-sig@lists.linaro.org, linux-trace-kernel@vger.kernel.org, Thierry Reding , Chun Ng X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2551; i=treding@nvidia.com; h=from:subject:message-id; bh=G1LDIXegX2JsIizEgI4OVqdVWI4H2qUqnDjgZImq5XA=; b=owEBbQKS/ZANAwAKAd0jrNd/PrOhAcsmYgBqRTuFpaJPLzRyixdVeDrzwyjHz8TdwopYr+lh2 QtMV/FTH92JAjMEAAEKAB0WIQSI6sMIAUnM98CNyJ/dI6zXfz6zoQUCakU7hQAKCRDdI6zXfz6z oYHgD/9DX2Si/rXRk+uCTzgU4FnEHIC0/836XVX0PwE8Ma9Ts3J4Ee1/5z4Bu7fsEBHy4B5nsYJ 5HY7goBFPkb8aaQuFHph3Elh5ghlrSLBKMwuM9bif/EjTZCy4cJvzDmW8MoMxwShmrhItxDbn2m wDriAvc09QSZbZJXHGas0SwlZbJrBfz/L7SGZpaHlEuK0/18CNrzsihbkF03qYcRhI+bIbyKp6x OCCsizV8aNU6Rdv6A76LYBE1opYbwXE3hBvSoEb0rdjK4pwc1M9VrGaANO2WFhSqtp3p329kiCR t3M6Tcq9VW6OhNoVWjtbxSYsH4AyO/4GImvYOoBBZmABxd3BYGtDyx9qiSxwTnhIOkowltBwDEC r8qcvoNnhp1KLdYBeatZBsgshi++YY+yJDNl7EnvEnHwAsIe0yhIyirKeSf1eTvj/1j3R4XXu5i w2FAaNtlofPzZAj/5aiWC8afRClCczkiKN/T527UzBH93xC/VZFX214PjZama7wpFXNU98m3jDG wFusLKzUfW0WuCLubnpA/ais9Yz78tToqcJdtGAvP/sN+buHI3vnWH44We1nPHow3pKyFXOxngI uPQWSO+yHz2FMkvwy0UDzziwfMQNIiMuzY7FpCKSivOCfIUKmjoYRUW/GLcGJqauaMlNBlwCoMm 8wKqeTnYGGDOWRw== X-Developer-Key: i=treding@nvidia.com; a=openpgp; fpr=88EAC3080149CCF7C08DC89FDD23ACD77F3EB3A1 X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 731201C0013 X-Rspam-User: X-Stat-Signature: a7hbayazywuz5imgn1sruk9nzwn715wp X-HE-Tag: 1782922133-842164 X-HE-Meta: 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 LOAEfUhe 6ru1KJQ3jvNYZMhmoeFcl/8A6kzPdObN3OCvlZ9j1nn+rnFqp1MHl+gjigbGaPNJCa9puZ1v+YXT8KSvwSUJYyO8P9pR6z7FLiV+rcLTJaPDq+5ZQgQ5SwNsmltrAJ0E/b2iCBEbUA/IH0at3mkdmqUdtVUK4pnTXIDI13fRHF1nN6TOzKpn4PHxEiU7NFP5aFL3xEgzBTugVw5rkw19bcszcry3xTGqoD194Fysi0I2kC80zYke/0eZKE0osGhOEHP1ve5lgr89MtG34qsrF3mHEGrkn5OxamGeAzJdVJrLG+7fiXtn+PnAdDVCurK7McqtmK7RhCLJMLhYwLzI+zsUFT+tTKSy3iAxlvkQD/Tg0PtA= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Chun Ng Add helpers to swap PROT_NORMAL and PROT_DEVICE_nGnRnE protection bits on a kernel-linear-map range. Signed-off-by: Chun Ng Signed-off-by: Thierry Reding --- arch/arm64/include/asm/set_memory.h | 2 ++ arch/arm64/mm/pageattr.c | 16 ++++++++++++++++ include/linux/set_memory.h | 11 +++++++++++ 3 files changed, 29 insertions(+) diff --git a/arch/arm64/include/asm/set_memory.h b/arch/arm64/include/asm/set_memory.h index 90f61b17275e..6a7030609789 100644 --- a/arch/arm64/include/asm/set_memory.h +++ b/arch/arm64/include/asm/set_memory.h @@ -10,6 +10,8 @@ bool can_set_direct_map(void); #define can_set_direct_map can_set_direct_map int set_memory_valid(unsigned long addr, int numpages, int enable); +int set_memory_device(unsigned long addr, int numpages); +int set_memory_normal(unsigned long addr, int numpages); int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index bbe98ac9ad8c..871b59a6c9ea 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -251,6 +251,22 @@ int set_memory_valid(unsigned long addr, int numpages, int enable) __pgprot(PTE_PRESENT_VALID_KERNEL)); } +int set_memory_device(unsigned long addr, int numpages) +{ + return __change_memory_common(addr, PAGE_SIZE * numpages, + __pgprot(PROT_DEVICE_nGnRnE), + __pgprot(PROT_NORMAL)); +} +EXPORT_SYMBOL_GPL(set_memory_device); + +int set_memory_normal(unsigned long addr, int numpages) +{ + return __change_memory_common(addr, PAGE_SIZE * numpages, + __pgprot(PROT_NORMAL), + __pgprot(PROT_DEVICE_nGnRnE)); +} +EXPORT_SYMBOL_GPL(set_memory_normal); + int set_direct_map_invalid_noflush(struct page *page) { pgprot_t clear_mask = __pgprot(PTE_PRESENT_VALID_KERNEL); diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h index 3030d9245f5a..abcb11378fdb 100644 --- a/include/linux/set_memory.h +++ b/include/linux/set_memory.h @@ -72,6 +72,17 @@ static inline int clear_mce_nospec(unsigned long pfn) } #endif +#ifndef CONFIG_ARM64 +static inline int set_memory_device(unsigned long addr, int numpages) +{ + return 0; +} +static inline int set_memory_normal(unsigned long addr, int numpages) +{ + return 0; +} +#endif + #ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT static inline int set_memory_encrypted(unsigned long addr, int numpages) { -- 2.54.0