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RISC-V: KVM: set 'vlenb' in kvm_riscv_vcpu_alloc_vector_context()

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'vlenb', added to riscv_v_ext_state by commit c35f3aa34509 ("RISC-V:
vector: export VLENB csr in __sc_riscv_v_state"), isn't being
initialized in guest_context. If we export 'vlenb' as a KVM CSR,
something we want to do in the next patch, it'll always return 0.

Set 'vlenb' to riscv_v_size/32.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Daniel Henrique Barboza 2023-12-05 14:45:07 -03:00 committed by Anup Patel
parent bdf6aa328f
commit 197bd237b6
1 changed files with 1 additions and 0 deletions
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arch/riscv/kvm/vcpu_vector.c
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@ -76,6 +76,7 @@ int kvm_riscv_vcpu_alloc_vector_context(struct kvm_vcpu *vcpu,
cntx->vector.datap = kmalloc(riscv_v_vsize, GFP_KERNEL);
if (!cntx->vector.datap)
return -ENOMEM;
cntx->vector.vlenb = riscv_v_vsize / 32;
vcpu->arch.host_context.vector.datap = kzalloc(riscv_v_vsize, GFP_KERNEL);
if (!vcpu->arch.host_context.vector.datap)