diff options
| 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/kvm/pmu.c | |
| parent | 2a1198c9b436402582f7beed57028044b819329c (diff) | |
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/kvm/pmu.c')
| -rw-r--r-- | arch/arm64/kvm/pmu.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm64/kvm/pmu.c b/arch/arm64/kvm/pmu.c index c869c851d2dd..faf32a44ba04 100644 --- a/arch/arm64/kvm/pmu.c +++ b/arch/arm64/kvm/pmu.c @@ -33,7 +33,7 @@ void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) { struct kvm_host_data *ctx = this_cpu_ptr_hyp_sym(kvm_host_data); - if (!kvm_pmu_switch_needed(attr)) + if (!ctx || !kvm_pmu_switch_needed(attr)) return; if (!attr->exclude_host) @@ -49,6 +49,9 @@ void kvm_clr_pmu_events(u32 clr) { struct kvm_host_data *ctx = this_cpu_ptr_hyp_sym(kvm_host_data); + if (!ctx) + return; + ctx->pmu_events.events_host &= ~clr; ctx->pmu_events.events_guest &= ~clr; } |