Messages in this thread | | | Date | Thu, 4 Mar 2021 14:09:36 +0000 | From | Will Deacon <> | Subject | Re: [PATCH v3 07/32] KVM: arm64: Introduce a BSS section for use at Hyp |
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On Tue, Mar 02, 2021 at 02:59:37PM +0000, Quentin Perret wrote: > Currently, the hyp code cannot make full use of a bss, as the kernel > section is mapped read-only. > > While this mapping could simply be changed to read-write, it would > intermingle even more the hyp and kernel state than they currently are. > Instead, introduce a __hyp_bss section, that uses reserved pages, and > create the appropriate RW hyp mappings during KVM init. > > Signed-off-by: Quentin Perret <qperret@google.com> > --- > arch/arm64/include/asm/sections.h | 1 + > arch/arm64/kernel/vmlinux.lds.S | 52 ++++++++++++++++++++----------- > arch/arm64/kvm/arm.c | 14 ++++++++- > arch/arm64/kvm/hyp/nvhe/hyp.lds.S | 1 + > 4 files changed, 49 insertions(+), 19 deletions(-)
Acked-by: Will Deacon <will@kernel.org>
Will
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