On 23/08/2016 01:27, Brijesh Singh wrote:
> In current implementation, asid allocation starts from 1, this patch
> adds a min_asid variable in svm_vcpu structure to allow starting asid
> from something other than 1.
>
> Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
> ---
> arch/x86/kvm/svm.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index 211be94..f010b23 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -470,6 +470,7 @@ struct svm_cpu_data {
> u64 asid_generation;
> u32 max_asid;
> u32 next_asid;
> + u32 min_asid;
> struct kvm_ldttss_desc *tss_desc;
>
> struct page *save_area;
> @@ -726,6 +727,7 @@ static int svm_hardware_enable(void)
> sd->asid_generation = 1;
> sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
> sd->next_asid = sd->max_asid + 1;
> + sd->min_asid = 1;
>
> native_store_gdt(&gdt_descr);
> gdt = (struct desc_struct *)gdt_descr.address;
> @@ -1887,7 +1889,7 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
> {
> if (sd->next_asid > sd->max_asid) {
> ++sd->asid_generation;
> - sd->next_asid = 1;
> + sd->next_asid = sd->min_asid;
> svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
> }
>
>
> --
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>
Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
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