kvm: arm64: Set up hyp percpu data for nVHE

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Add hyp percpu section to linker script and rename the corresponding ELF
sections of hyp/nvhe object files. This moves all nVHE-specific percpu
variables to the new hyp percpu section.

Allocate sufficient amount of memory for all percpu hyp regions at global KVM
init time and create corresponding hyp mappings.

The base addresses of hyp percpu regions are kept in a dynamically allocated
array in the kernel.

Add NULL checks in PMU event-reset code as it may run before KVM memory is
initialized.

Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200922204910.7265-10-dbrazdil@google.com

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David Brazdil 2020-09-22 21:49:09 +01:00 • committed by Marc Zyngier

parent 2a1198c9b4

commit 30c953911c

5 changed files with 87 additions and 6 deletions

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19

arch/arm64/include/asm/kvm_asm.h

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8

arch/arm64/kernel/vmlinux.lds.S

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55

arch/arm64/kvm/arm.c

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6

arch/arm64/kvm/hyp/nvhe/hyp.lds.S

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5

arch/arm64/kvm/pmu.c

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