On 5/2/2024 6:44 PM, Andrew Jones wrote:
> On Wed, May 01, 2024 at 02:54:32PM GMT, Manali Shukla wrote:
>> From: Manali Shukla <[email protected]>
>>
>> The interface is used to read the data values of a specified vcpu stat
>> from the currenly available binary stats interface.
>>
>> Signed-off-by: Manali Shukla <[email protected]>
>> ---
>> .../testing/selftests/kvm/include/kvm_util.h | 66 +++++++++++++++++++
>> tools/testing/selftests/kvm/lib/kvm_util.c | 32 +++++++++
>> 2 files changed, 98 insertions(+)
>>
>> diff --git a/tools/testing/selftests/kvm/include/kvm_util.h
>> b/tools/testing/selftests/kvm/include/kvm_util.h
>> index 63c2aaae51f3..7dad3275a4d3 100644
>> --- a/tools/testing/selftests/kvm/include/kvm_util.h
>> +++ b/tools/testing/selftests/kvm/include/kvm_util.h
>> @@ -518,6 +518,72 @@ static inline uint64_t vm_get_stat(struct kvm_vm *vm,
>> const char *stat_name)
>> return data;
>> }
>>
>> +/*
>> + * Ensure that the sequence of the enum vcpu_stat_types matches the order of
>> + * kvm_vcpu_stats_desc[]. Otherwise, vcpu_get_stat() may return incorrect
>> data
>> + * because __vcpu_get_stat() uses the enum type as an index to get the
>> + * descriptor for a given stat and then uses read_stat_data() to get the
>> stats
>> + * from the descriptor.
>> + */
>> +enum vcpu_stat_types {
>> + HALT_SUCCESSFUL_POLL,
>> + HALT_ATTEMPTED_POLL,
>> + HALT_POLL_INVALID,
>> + HALT_WAKEUP,
>> + HALT_POLL_SUCCESS_NS,
>> + HALT_POLL_FAIL_NS,
>> + HALT_WAIT_NS,
>> + HALT_POLL_SUCCESS_HIST,
>> + HALT_POLL_FAIL_HIST,
>> + HALT_WAIT_HIST,
>> + BLOCKING,
>
> Everything below here is x86 specific, but this is an arch-neutral file.
> Please structure this in a way that each architecture can share the
> generic types and also provide its own.
>
> Thanks,
> drew
Thank you for reviewing my patches.
Sure. I will take care of it in the next version.
-Manali
>
>> + PF_TAKEN,
>> + PF_FIXED,
>> + PF_EMULATE,
>> + PF_SPURIOUS,
>> + PF_FAST,
>> + PF_MMIO_SPTE_CREATED,
>> + PF_GUEST,
>> + TLB_FLUSH,
>> + INVLPG,
>> + EXITS,
>> + IO_EXITS,
>> + MMIO_EXITS,
>> + SIGNAL_EXITS,
>> + IRQ_WINDOW_EXITS,
>> + NMI_WINDOW_EXITS,
>> + LD_FLUSH,
>> + HALT_EXITS,
>> + REQUEST_IRQ_EXITS,
>> + IRQ_EXITS,
>> + HOST_STATE_RELOAD,
>> + FPU_RELOAD,
>> + INSN_EMULATION,
>> + INSN_EMULATION_FAIL,
>> + HYPERCALLS,
>> + IRQ_INJECTIONS,
>> + NMI_INJECTIONS,
>> + REQ_EVENT,
>> + NESTED_RUN,
>> + DIRECTED_YIELD_ATTEMPTED,
>> + DIRECTED_YIELD_SUCCESSFUL,
>> + PREEMPTION_REPORTED,
>> + PREEMPTION_OTHER,
>> + GUEST_MODE,
>> + NOTIFY_WINDOW_EXITS,
>> +};
>> +
>> +void __vcpu_get_stat(struct kvm_vcpu *vcpu, enum vcpu_stat_types type,
>> uint64_t *data,
>> + size_t max_elements);
>> +
>> +static inline uint64_t vcpu_get_stat(struct kvm_vcpu *vcpu, enum
>> vcpu_stat_types type)
>> +{
>> + uint64_t data;
>> +
>> + __vcpu_get_stat(vcpu, type, &data, 1);
>> + return data;
>> +}
>> +
>> void vm_create_irqchip(struct kvm_vm *vm);
>>
>> static inline int __vm_create_guest_memfd(struct kvm_vm *vm, uint64_t size,
>> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c
>> b/tools/testing/selftests/kvm/lib/kvm_util.c
>> index 6b2158655baa..3de292ca9280 100644
>> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
>> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
>> @@ -2256,6 +2256,38 @@ void read_stat_data(int stats_fd, struct
>> kvm_stats_header *header,
>> desc->name, size, ret);
>> }
>>
>> +/*
>> + * Read the data of the named vcpu stat
>> + *
>> + * Input Args:
>> + * vcpu - the vcpu for which the stat should be read
>> + * stat_name - the name of the stat to read
>> + * max_elements - the maximum number of 8-byte values to read into data
>> + *
>> + * Output Args:
>> + * data - the buffer into which stat data should be read
>> + *
>> + * Read the data values of a specified stat from the binary stats interface.
>> + */
>> +void __vcpu_get_stat(struct kvm_vcpu *vcpu, enum vcpu_stat_types type,
>> uint64_t *data,
>> + size_t max_elements)
>> +{
>> + int vcpu_stats_fd;
>> + struct kvm_stats_header header;
>> + struct kvm_stats_desc *desc, *t_desc;
>> + size_t size_desc;
>> +
>> + vcpu_stats_fd = vcpu_get_stats_fd(vcpu);
>> + read_stats_header(vcpu_stats_fd, &header);
>> +
>> + desc = read_stats_descriptors(vcpu_stats_fd, &header);
>> + size_desc = get_stats_descriptor_size(&header);
>> +
>> + t_desc = (void *)desc + (type * size_desc);
>> + read_stat_data(vcpu_stats_fd, &header, t_desc,
>> + data, max_elements);
>> +}
>> +
>> /*
>> * Read the data of the named stat
>> *
>> --
>> 2.34.1
>>
