Re: [PATCH v7 2/4] KVM: stats: Add fd-based API to read binary stats data

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 03/06/21 23:14, Jing Zhang wrote:
> +#define DEFINE_VM_STATS_DESC(...) {					       \
> +	STATS_DESC_COUNTER("remote_tlb_flush"),				       \
> +	## __VA_ARGS__							       \
> +}
> +
> +#define DEFINE_VCPU_STATS_DESC(...) {					       \
> +	STATS_DESC_COUNTER("halt_successful_poll"),			       \
> +	STATS_DESC_COUNTER("halt_attempted_poll"),			       \
> +	STATS_DESC_COUNTER("halt_poll_invalid"),			       \
> +	STATS_DESC_COUNTER("halt_wakeup"),				       \
> +	STATS_DESC_TIME_NSEC("halt_poll_success_ns"),			       \
> +	STATS_DESC_TIME_NSEC("halt_poll_fail_ns"),			       \
> +	## __VA_ARGS__							       \

Let's instead put this (note it's without braces) in macros like these

#define KVM_GENERIC_VM_STATS()							\
	STATS_DESC_COUNTER("remote_tlb_flush"),

#define KVM_GENERIC_VCPU_STATS(...)						\
	STATS_DESC_COUNTER("halt_successful_poll"),				\
	STATS_DESC_COUNTER("halt_attempted_poll"),				\
	STATS_DESC_COUNTER("halt_poll_invalid"),				\
	STATS_DESC_COUNTER("halt_wakeup"),					\
	STATS_DESC_TIME_NSEC("halt_poll_success_ns"),				\
	STATS_DESC_TIME_NSEC("halt_poll_fail_ns"),

and it can be used in the arch files.  In fact it can even be added in patch 1 and
switched to STATS_DESC_* here.

Paolo