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[ Upstream commit c987876a80e7bcb98a839f10dca9ce7fda4feced ] Contrary to the non-VHE version of the TLB invalidation helpers, the VHE code has interrupts enabled, meaning that we can take an interrupt in the middle of such a sequence, and start running something else with HCR_EL2.TGE cleared. That's really not a good idea. Take the heavy-handed option and disable interrupts in __tlb_switch_to_guest_vhe, restoring them in __tlb_switch_to_host_vhe. The latter also gain an ISB in order to make sure that TGE really has taken effect. Cc: stable@vger.kernel.org Acked-by: Christoffer Dall <christoffer.dall@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.