diff options
| author | Fuad Tabba <tabba@google.com> | 2024-04-23 18:05:09 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2024-05-01 18:46:58 +0300 |
| commit | 4c22a40dd9c3dcc2156f312ffc71955e56192a76 (patch) | |
| tree | d6945eed107a84653b4cbc0d7f46ecdf2d36768d | |
| parent | 5294afdbf45aced5295fe5941c58b40c41c23800 (diff) | |
| download | linux-4c22a40dd9c3dcc2156f312ffc71955e56192a76.tar.xz | |
KVM: arm64: Initialize the kvm host data's fpsimd_state pointer in pKVM
Since the host_fpsimd_state has been removed from kvm_vcpu_arch,
it isn't pointing to the hyp's version of the host fp_regs in
protected mode.
Initialize the host_data fpsimd_state point to the host_data's
context fp_regs on pKVM initialization.
Fixes: 51e09b5572d6 ("KVM: arm64: Exclude host_fpsimd_state pointer from kvm_vcpu_arch")
Signed-off-by: Fuad Tabba <tabba@google.com>
Acked-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240423150538.2103045-2-tabba@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
| -rw-r--r-- | arch/arm64/kvm/hyp/include/nvhe/pkvm.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/pkvm.c | 11 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/setup.c | 1 |
3 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h b/arch/arm64/kvm/hyp/include/nvhe/pkvm.h index 82b3d62538a6..20c3f6e13b99 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h +++ b/arch/arm64/kvm/hyp/include/nvhe/pkvm.h @@ -54,6 +54,7 @@ pkvm_hyp_vcpu_to_hyp_vm(struct pkvm_hyp_vcpu *hyp_vcpu) } void pkvm_hyp_vm_table_init(void *tbl); +void pkvm_host_fpsimd_state_init(void); int __pkvm_init_vm(struct kvm *host_kvm, unsigned long vm_hva, unsigned long pgd_hva); diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c index 26dd9a20ad6e..492b7fc2c0c7 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -247,6 +247,17 @@ void pkvm_hyp_vm_table_init(void *tbl) vm_table = tbl; } +void pkvm_host_fpsimd_state_init(void) +{ + unsigned long i; + + for (i = 0; i < hyp_nr_cpus; i++) { + struct kvm_host_data *host_data = per_cpu_ptr(&kvm_host_data, i); + + host_data->fpsimd_state = &host_data->host_ctxt.fp_regs; + } +} + /* * Return the hyp vm structure corresponding to the handle. */ diff --git a/arch/arm64/kvm/hyp/nvhe/setup.c b/arch/arm64/kvm/hyp/nvhe/setup.c index ae00dfa80801..859f22f754d3 100644 --- a/arch/arm64/kvm/hyp/nvhe/setup.c +++ b/arch/arm64/kvm/hyp/nvhe/setup.c @@ -300,6 +300,7 @@ void __noreturn __pkvm_init_finalise(void) goto out; pkvm_hyp_vm_table_init(vm_table_base); + pkvm_host_fpsimd_state_init(); out: /* * We tail-called to here from handle___pkvm_init() and will not return, |