kernel/arch/arm64/include/asm/hyp_image.h, branch linux-6.2.y

KVM: arm64: Allow using kvm_nvhe_sym() in hyp code

2021-03-19T12:01:20Z

In order to allow the usage of code shared by the host and the hyp in static inline library functions, allow the usage of kvm_nvhe_sym() at EL2 by defaulting to the raw symbol name. Acked-by: Will Deacon Signed-off-by: Quentin Perret Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210319100146.1149909-10-qperret@google.com

KVM: arm64: Link position-independent string routines into .hyp.text

2021-03-19T12:01:19Z

Pull clear_page(), copy_page(), memcpy() and memset() into the nVHE hyp code and ensure that we always execute the '__pi_' entry point on the offchance that it changes in future. [ qperret: Commit title nits and added linker script alias ] Signed-off-by: Will Deacon Signed-off-by: Quentin Perret Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210319100146.1149909-3-qperret@google.com

KVM: arm64: Add symbol at the beginning of each hyp section

2021-01-23T14:00:57Z

Generating hyp relocations will require referencing positions at a given offset from the beginning of hyp sections. Since the final layout will not be determined until the linking of `vmlinux`, modify the hyp linker script to insert a symbol at the first byte of each hyp section to use as an anchor. The linker of `vmlinux` will place the symbols together with the sections. Signed-off-by: David Brazdil Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210105180541.65031-4-dbrazdil@google.com

kvm: arm64: Move nVHE hyp namespace macros to hyp_image.h

2020-09-30T07:33:52Z

Minor cleanup to move all macros related to prefixing nVHE hyp section and symbol names into one place: hyp_image.h. Signed-off-by: David Brazdil Signed-off-by: Marc Zyngier Acked-by: Will Deacon Link: https://lore.kernel.org/r/20200922204910.7265-3-dbrazdil@google.com

kvm: arm64: Partially link nVHE hyp code, simplify HYPCOPY

2020-09-30T07:33:52Z

Relying on objcopy to prefix the ELF section names of the nVHE hyp code is brittle and prevents us from using wildcards to match specific section names. Improve the build rules by partially linking all '.nvhe.o' files and prefixing their ELF section names using a linker script. Continue using objcopy for prefixing ELF symbol names. One immediate advantage of this approach is that all subsections matching a pattern can be merged into a single prefixed section, eg. .text and .text.* can be linked into a single '.hyp.text'. This removes the need for -fno-reorder-functions on GCC and will be useful in the future too: LTO builds use .text subsections, compilers routinely generate .rodata subsections, etc. Partially linking all hyp code into a single object file also makes it easier to analyze. Signed-off-by: David Brazdil Signed-off-by: Marc Zyngier Acked-by: Will Deacon Link: https://lore.kernel.org/r/20200922204910.7265-2-dbrazdil@google.com