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| author |   David Brazdil <dbrazdil@google.com> | 2020-09-22 21:49:07 +0100 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2020-09-30 08:37:13 +0100 |
| commit | df4c8214a18d202fa0ec221a001f640e020f7e44 (patch) | |
| tree | 7f4227456644dd41451490fd45082a4e7f9ab30c /arch/arm64/kvm | |
| parent | kvm: arm64: Add helpers for accessing nVHE hyp per-cpu vars (diff) | |
| download | linux-dev-df4c8214a18d202fa0ec221a001f640e020f7e44.tar.xz linux-dev-df4c8214a18d202fa0ec221a001f640e020f7e44.zip | |
kvm: arm64: Duplicate arm64_ssbd_callback_required for nVHE hyp
Hyp keeps track of which cores require SSBD callback by accessing a
kernel-proper global variable. Create an nVHE symbol of the same name
and copy the value from kernel proper to nVHE as KVM is being enabled
on a core.
Done in preparation for separating percpu memory owned by kernel
proper and nVHE.
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/20200922204910.7265-8-dbrazdil@google.com
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/arm.c | 3 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/switch.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 46dc3d75cf13..cbfff390f55f 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1295,6 +1295,9 @@ static void cpu_init_hyp_mode(void) arm64_get_ssbd_state() == ARM64_SSBD_FORCE_DISABLE) { kvm_call_hyp_nvhe(__kvm_enable_ssbs); } + + /* Copy information whether SSBD callback is required to hyp. */ + hyp_init_aux_data(); } static void cpu_hyp_reset(void) diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c index cc4f8e790fb3..4662df6330d7 100644 --- a/arch/arm64/kvm/hyp/nvhe/switch.c +++ b/arch/arm64/kvm/hyp/nvhe/switch.c @@ -27,6 +27,9 @@ #include <asm/processor.h> #include <asm/thread_info.h> +/* Non-VHE copy of the kernel symbol. */ +DEFINE_PER_CPU_READ_MOSTLY(u64, arm64_ssbd_callback_required); + static void __activate_traps(struct kvm_vcpu *vcpu) { u64 val; |