Re: [PATCH 5/9] x86/hypercall: Move the hypercall tables into C

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 02/08/16 14:23, Jan Beulich wrote:
>>>> On 18.07.16 at 11:51, <andrew.cooper3@citrix.com> wrote:
>> +hypercall_fn_t *const hypercall_table[NR_hypercalls] = {
>> +    HYPERCALL(set_trap_table),
>> +    HYPERCALL(mmu_update),
>> +    HYPERCALL(set_gdt),
>> +    HYPERCALL(stack_switch),
>> +    HYPERCALL(set_callbacks),
>> +    HYPERCALL(fpu_taskswitch),
>> +    HYPERCALL(sched_op_compat),
>> +    HYPERCALL(platform_op),
>> +    HYPERCALL(set_debugreg),
>> +    HYPERCALL(get_debugreg),
>> +    HYPERCALL(update_descriptor),
>> +    HYPERCALL(memory_op),
>> +    HYPERCALL(multicall),
>> +    HYPERCALL(update_va_mapping),
>> +    HYPERCALL(set_timer_op),
>> +    HYPERCALL(event_channel_op_compat),
>> +    HYPERCALL(xen_version),
>> +    HYPERCALL(console_io),
>> +    HYPERCALL(physdev_op_compat),
>> +    HYPERCALL(grant_table_op),
>> +    HYPERCALL(vm_assist),
>> +    HYPERCALL(update_va_mapping_otherdomain),
>> +    HYPERCALL(iret),
>> +    HYPERCALL(vcpu_op),
>> +    HYPERCALL(set_segment_base),
>> +    HYPERCALL(mmuext_op),
>> +    HYPERCALL(xsm_op),
>> +    HYPERCALL(nmi_op),
>> +    HYPERCALL(sched_op),
>> +    HYPERCALL(callback_op),
>> +#ifdef CONFIG_XENOPROF
>> +    HYPERCALL(xenoprof_op),
>> +#endif
>> +    HYPERCALL(event_channel_op),
>> +    HYPERCALL(physdev_op),
>> +    HYPERCALL(hvm_op),
>> +    HYPERCALL(sysctl),
>> +    HYPERCALL(domctl),
>> +#ifdef CONFIG_KEXEC
>> +    HYPERCALL(kexec_op),
>> +#endif
>> +#ifdef CONFIG_TMEM
>> +    HYPERCALL(tmem_op),
>> +#endif
> To be honest I'd prefer the necessary #ifdef-ery to live in hypercall.h,
> the more that then ARM could (if they want) benefit from that too.

Which #ifdefary?

HYPERCALL() can't be used by ARM.

>
>> +hypercall_fn_t *const compat_hypercall_table[NR_hypercalls] = {
> Is it really helpful to create two separate tables here, just to then
> merge them in patch 7?

This is necessary, so the untangling of multicalls can happen in patch 6.

The only other bisectable option is to merge patches 5-7, which is
definitely too complicated to review.

~Andrew

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