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| author | David Brazdil <dbrazdil@google.com> | 2020-09-22 21:49:09 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-30 08:37:14 +0100 |
| commit | 30c953911c4370bfb622ee1c2fcc7e78c84df800 (patch) | |
| tree | 525991f0ee45ff0992dae3b2858030d5f622b1d2 /arch/arm64/kernel | |
| parent | 2a1198c9b436402582f7beed57028044b819329c (diff) | |
| download | linux-30c953911c4370bfb622ee1c2fcc7e78c84df800.tar.bz2 | |
kvm: arm64: Set up hyp percpu data for nVHE
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
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index d14166012e51..d52e6b5dbfd3 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -28,8 +28,15 @@ jiffies = jiffies_64; __start___kvm_ex_table = .; \ *(__kvm_ex_table) \ __stop___kvm_ex_table = .; + +#define HYPERVISOR_PERCPU_SECTION \ + . = ALIGN(PAGE_SIZE); \ + HYP_SECTION_NAME(.data..percpu) : { \ + *(HYP_SECTION_NAME(.data..percpu)) \ + } #else /* CONFIG_KVM */ #define HYPERVISOR_EXTABLE +#define HYPERVISOR_PERCPU_SECTION #endif #define HYPERVISOR_TEXT \ @@ -195,6 +202,7 @@ SECTIONS } PERCPU_SECTION(L1_CACHE_BYTES) + HYPERVISOR_PERCPU_SECTION .rela.dyn : ALIGN(8) { *(.rela .rela*) |