From 8c49b5d43d4c45ca0bb0d1faa23feef2e76e89fa Mon Sep 17 00:00:00 2001 From: David Brazdil Date: Tue, 5 Jan 2021 18:05:37 +0000 Subject: KVM: arm64: Generate hyp relocation data Add a post-processing step to compilation of KVM nVHE hyp code which calls a custom host tool (gen-hyprel) on the partially linked object file (hyp sections' names prefixed). The tool lists all R_AARCH64_ABS64 data relocations targeting hyp sections and generates an assembly file that will form a new section .hyp.reloc in the kernel binary. The new section contains an array of 32-bit offsets to the positions targeted by these relocations. Since these addresses of those positions will not be determined until linking of `vmlinux`, each 32-bit entry carries a R_AARCH64_PREL32 relocation with addend + . The linker of `vmlinux` will therefore fill the slot accordingly. This relocation data will be used at runtime to convert the kernel VAs at those positions to hyp VAs. Signed-off-by: David Brazdil Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210105180541.65031-5-dbrazdil@google.com --- arch/arm64/kvm/hyp/nvhe/.gitignore | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm64/kvm/hyp/nvhe/.gitignore') diff --git a/arch/arm64/kvm/hyp/nvhe/.gitignore b/arch/arm64/kvm/hyp/nvhe/.gitignore index 695d73d0249e..5b6c43cc96f8 100644 --- a/arch/arm64/kvm/hyp/nvhe/.gitignore +++ b/arch/arm64/kvm/hyp/nvhe/.gitignore @@ -1,2 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only +gen-hyprel hyp.lds +hyp-reloc.S -- cgit