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30ae9610d2
The current ITS driver works fine as long as normal memory and GICR regions are located within the lower 48bit (>=0 && <2^48) physical address space. Some of the registers GICR_PEND/PROP, GICR_VPEND/VPROP and GITS_CBASER are handled properly but not all when configuring the hardware with 52bit physical address. This patch does the following changes to support 52bit PA. -Handle 52bit PA in GITS_BASERn. -Fix ITT_addr width to 52bits, bits[51:8]. -Fix RDbase width to 52bits, bits[51:16]. -Fix VPT_addr width to 52bits, bits[51:16]. Definition of the GITS_BASERn register when ITS PageSize is 64KB: -Bits[47:16] of the register provide bits[47:16] of the table PA. -Bits[15:12] of the register provide bits[51:48] of the table PA. -Bits[15:00] of the base physical address are 0. Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> |
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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.