On Tue, Jul 19, 2016 at 1:12 AM, Suraj Jitindar Singh
<sjitindarsingh@xxxxxxxxx> wrote:
> vms and vcpus have statistics associated with them which can be viewed
> within the debugfs. Currently it is assumed within the vcpu_stat_get() and
> vm_stat_get() functions that all of these statistics are represented as
> u32s, however the next patch adds some u64 vcpu statistics.
>
> Change all vcpu statistics to u64 and modify vcpu_stat_get() accordingly.
> Since vcpu statistics are per vcpu, they will only be updated by a single
> vcpu at a time so this shouldn't present a problem on 32-bit machines
> which can't atomically increment 64-bit numbers. However vm statistics
> could potentially be updated by multiple vcpus from that vm at a time.
> To avoid the overhead of atomics make all vm statistics ulong such that
> they are 64-bit on 64-bit systems where they can be atomically incremented
> and are 32-bit on 32-bit systems which may not be able to atomically
> increment 64-bit numbers. Modify vm_stat_get() to expect ulongs.
>
> Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@xxxxxxxxx>
Looks great, thanks.
Reviewed-by: David Matlack <dmatlack@xxxxxxxxxx>
>
> ---
> Change Log:
>
> V2 -> V3:
> - Instead of implementing separate u32 and u64 functions keep the
> generic functions and modify them to expect u64s. Thus update all
> vm and vcpu statistics to u64s accordingly.
> V3 -> V4:
> - Change vm_stats from u64 to ulong
> ---
> arch/arm/include/asm/kvm_host.h | 12 ++--
> arch/arm64/include/asm/kvm_host.h | 12 ++--
> arch/mips/include/asm/kvm_host.h | 46 ++++++-------
> arch/powerpc/include/asm/kvm_host.h | 60 ++++++++---------
> arch/s390/include/asm/kvm_host.h | 128 ++++++++++++++++++------------------
> arch/x86/include/asm/kvm_host.h | 72 ++++++++++----------
> virt/kvm/kvm_main.c | 4 +-
> 7 files changed, 167 insertions(+), 167 deletions(-)
>
> diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
> index 96387d4..c8e55b3b 100644
> --- a/arch/arm/include/asm/kvm_host.h
> +++ b/arch/arm/include/asm/kvm_host.h
> @@ -183,15 +183,15 @@ struct kvm_vcpu_arch {
> };
>
> struct kvm_vm_stat {
> - u32 remote_tlb_flush;
> + ulong remote_tlb_flush;
> };
>
> struct kvm_vcpu_stat {
> - u32 halt_successful_poll;
> - u32 halt_attempted_poll;
> - u32 halt_poll_invalid;
> - u32 halt_wakeup;
> - u32 hvc_exit_stat;
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> + u64 hvc_exit_stat;
> u64 wfe_exit_stat;
> u64 wfi_exit_stat;
> u64 mmio_exit_user;
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 49095fc..b14c8bc 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -291,15 +291,15 @@ struct kvm_vcpu_arch {
> #endif
>
> struct kvm_vm_stat {
> - u32 remote_tlb_flush;
> + ulong remote_tlb_flush;
> };
>
> struct kvm_vcpu_stat {
> - u32 halt_successful_poll;
> - u32 halt_attempted_poll;
> - u32 halt_poll_invalid;
> - u32 halt_wakeup;
> - u32 hvc_exit_stat;
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> + u64 hvc_exit_stat;
> u64 wfe_exit_stat;
> u64 wfi_exit_stat;
> u64 mmio_exit_user;
> diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
> index 36a391d..9704888 100644
> --- a/arch/mips/include/asm/kvm_host.h
> +++ b/arch/mips/include/asm/kvm_host.h
> @@ -98,32 +98,32 @@ extern void (*kvm_mips_release_pfn_clean)(kvm_pfn_t pfn);
> extern bool (*kvm_mips_is_error_pfn)(kvm_pfn_t pfn);
>
> struct kvm_vm_stat {
> - u32 remote_tlb_flush;
> + ulong remote_tlb_flush;
> };
>
> struct kvm_vcpu_stat {
> - u32 wait_exits;
> - u32 cache_exits;
> - u32 signal_exits;
> - u32 int_exits;
> - u32 cop_unusable_exits;
> - u32 tlbmod_exits;
> - u32 tlbmiss_ld_exits;
> - u32 tlbmiss_st_exits;
> - u32 addrerr_st_exits;
> - u32 addrerr_ld_exits;
> - u32 syscall_exits;
> - u32 resvd_inst_exits;
> - u32 break_inst_exits;
> - u32 trap_inst_exits;
> - u32 msa_fpe_exits;
> - u32 fpe_exits;
> - u32 msa_disabled_exits;
> - u32 flush_dcache_exits;
> - u32 halt_successful_poll;
> - u32 halt_attempted_poll;
> - u32 halt_poll_invalid;
> - u32 halt_wakeup;
> + u64 wait_exits;
> + u64 cache_exits;
> + u64 signal_exits;
> + u64 int_exits;
> + u64 cop_unusable_exits;
> + u64 tlbmod_exits;
> + u64 tlbmiss_ld_exits;
> + u64 tlbmiss_st_exits;
> + u64 addrerr_st_exits;
> + u64 addrerr_ld_exits;
> + u64 syscall_exits;
> + u64 resvd_inst_exits;
> + u64 break_inst_exits;
> + u64 trap_inst_exits;
> + u64 msa_fpe_exits;
> + u64 fpe_exits;
> + u64 msa_disabled_exits;
> + u64 flush_dcache_exits;
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> };
>
> enum kvm_mips_exit_types {
> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
> index 610f393..f6304c5 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -95,41 +95,41 @@ struct kvmppc_vcpu_book3s;
> struct kvmppc_book3s_shadow_vcpu;
>
> struct kvm_vm_stat {
> - u32 remote_tlb_flush;
> + ulong remote_tlb_flush;
> };
>
> struct kvm_vcpu_stat {
> - u32 sum_exits;
> - u32 mmio_exits;
> - u32 signal_exits;
> - u32 light_exits;
> + u64 sum_exits;
> + u64 mmio_exits;
> + u64 signal_exits;
> + u64 light_exits;
> /* Account for special types of light exits: */
> - u32 itlb_real_miss_exits;
> - u32 itlb_virt_miss_exits;
> - u32 dtlb_real_miss_exits;
> - u32 dtlb_virt_miss_exits;
> - u32 syscall_exits;
> - u32 isi_exits;
> - u32 dsi_exits;
> - u32 emulated_inst_exits;
> - u32 dec_exits;
> - u32 ext_intr_exits;
> - u32 halt_successful_poll;
> - u32 halt_attempted_poll;
> - u32 halt_poll_invalid;
> - u32 halt_wakeup;
> - u32 dbell_exits;
> - u32 gdbell_exits;
> - u32 ld;
> - u32 st;
> + u64 itlb_real_miss_exits;
> + u64 itlb_virt_miss_exits;
> + u64 dtlb_real_miss_exits;
> + u64 dtlb_virt_miss_exits;
> + u64 syscall_exits;
> + u64 isi_exits;
> + u64 dsi_exits;
> + u64 emulated_inst_exits;
> + u64 dec_exits;
> + u64 ext_intr_exits;
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> + u64 dbell_exits;
> + u64 gdbell_exits;
> + u64 ld;
> + u64 st;
> #ifdef CONFIG_PPC_BOOK3S
> - u32 pf_storage;
> - u32 pf_instruc;
> - u32 sp_storage;
> - u32 sp_instruc;
> - u32 queue_intr;
> - u32 ld_slow;
> - u32 st_slow;
> + u64 pf_storage;
> + u64 pf_instruc;
> + u64 sp_storage;
> + u64 sp_instruc;
> + u64 queue_intr;
> + u64 ld_slow;
> + u64 st_slow;
> #endif
> };
>
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index ac82e8e..bdacd9c 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -238,69 +238,69 @@ struct sie_page {
> } __packed;
>
> struct kvm_vcpu_stat {
> - u32 exit_userspace;
> - u32 exit_null;
> - u32 exit_external_request;
> - u32 exit_external_interrupt;
> - u32 exit_stop_request;
> - u32 exit_validity;
> - u32 exit_instruction;
> - u32 exit_pei;
> - u32 halt_successful_poll;
> - u32 halt_attempted_poll;
> - u32 halt_poll_invalid;
> - u32 halt_wakeup;
> - u32 instruction_lctl;
> - u32 instruction_lctlg;
> - u32 instruction_stctl;
> - u32 instruction_stctg;
> - u32 exit_program_interruption;
> - u32 exit_instr_and_program;
> - u32 deliver_external_call;
> - u32 deliver_emergency_signal;
> - u32 deliver_service_signal;
> - u32 deliver_virtio_interrupt;
> - u32 deliver_stop_signal;
> - u32 deliver_prefix_signal;
> - u32 deliver_restart_signal;
> - u32 deliver_program_int;
> - u32 deliver_io_int;
> - u32 exit_wait_state;
> - u32 instruction_pfmf;
> - u32 instruction_stidp;
> - u32 instruction_spx;
> - u32 instruction_stpx;
> - u32 instruction_stap;
> - u32 instruction_storage_key;
> - u32 instruction_ipte_interlock;
> - u32 instruction_stsch;
> - u32 instruction_chsc;
> - u32 instruction_stsi;
> - u32 instruction_stfl;
> - u32 instruction_tprot;
> - u32 instruction_essa;
> - u32 instruction_sigp_sense;
> - u32 instruction_sigp_sense_running;
> - u32 instruction_sigp_external_call;
> - u32 instruction_sigp_emergency;
> - u32 instruction_sigp_cond_emergency;
> - u32 instruction_sigp_start;
> - u32 instruction_sigp_stop;
> - u32 instruction_sigp_stop_store_status;
> - u32 instruction_sigp_store_status;
> - u32 instruction_sigp_store_adtl_status;
> - u32 instruction_sigp_arch;
> - u32 instruction_sigp_prefix;
> - u32 instruction_sigp_restart;
> - u32 instruction_sigp_init_cpu_reset;
> - u32 instruction_sigp_cpu_reset;
> - u32 instruction_sigp_unknown;
> - u32 diagnose_10;
> - u32 diagnose_44;
> - u32 diagnose_9c;
> - u32 diagnose_258;
> - u32 diagnose_308;
> - u32 diagnose_500;
> + u64 exit_userspace;
> + u64 exit_null;
> + u64 exit_external_request;
> + u64 exit_external_interrupt;
> + u64 exit_stop_request;
> + u64 exit_validity;
> + u64 exit_instruction;
> + u64 exit_pei;
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> + u64 instruction_lctl;
> + u64 instruction_lctlg;
> + u64 instruction_stctl;
> + u64 instruction_stctg;
> + u64 exit_program_interruption;
> + u64 exit_instr_and_program;
> + u64 deliver_external_call;
> + u64 deliver_emergency_signal;
> + u64 deliver_service_signal;
> + u64 deliver_virtio_interrupt;
> + u64 deliver_stop_signal;
> + u64 deliver_prefix_signal;
> + u64 deliver_restart_signal;
> + u64 deliver_program_int;
> + u64 deliver_io_int;
> + u64 exit_wait_state;
> + u64 instruction_pfmf;
> + u64 instruction_stidp;
> + u64 instruction_spx;
> + u64 instruction_stpx;
> + u64 instruction_stap;
> + u64 instruction_storage_key;
> + u64 instruction_ipte_interlock;
> + u64 instruction_stsch;
> + u64 instruction_chsc;
> + u64 instruction_stsi;
> + u64 instruction_stfl;
> + u64 instruction_tprot;
> + u64 instruction_essa;
> + u64 instruction_sigp_sense;
> + u64 instruction_sigp_sense_running;
> + u64 instruction_sigp_external_call;
> + u64 instruction_sigp_emergency;
> + u64 instruction_sigp_cond_emergency;
> + u64 instruction_sigp_start;
> + u64 instruction_sigp_stop;
> + u64 instruction_sigp_stop_store_status;
> + u64 instruction_sigp_store_status;
> + u64 instruction_sigp_store_adtl_status;
> + u64 instruction_sigp_arch;
> + u64 instruction_sigp_prefix;
> + u64 instruction_sigp_restart;
> + u64 instruction_sigp_init_cpu_reset;
> + u64 instruction_sigp_cpu_reset;
> + u64 instruction_sigp_unknown;
> + u64 diagnose_10;
> + u64 diagnose_44;
> + u64 diagnose_9c;
> + u64 diagnose_258;
> + u64 diagnose_308;
> + u64 diagnose_500;
> };
>
> #define PGM_OPERATION 0x01
> @@ -563,7 +563,7 @@ struct kvm_vcpu_arch {
> };
>
> struct kvm_vm_stat {
> - u32 remote_tlb_flush;
> + ulong remote_tlb_flush;
> };
>
> struct kvm_arch_memory_slot {
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 69e62862..c30462f 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -782,45 +782,45 @@ struct kvm_arch {
> };
>
> struct kvm_vm_stat {
> - u32 mmu_shadow_zapped;
> - u32 mmu_pte_write;
> - u32 mmu_pte_updated;
> - u32 mmu_pde_zapped;
> - u32 mmu_flooded;
> - u32 mmu_recycled;
> - u32 mmu_cache_miss;
> - u32 mmu_unsync;
> - u32 remote_tlb_flush;
> - u32 lpages;
> + ulong mmu_shadow_zapped;
> + ulong mmu_pte_write;
> + ulong mmu_pte_updated;
> + ulong mmu_pde_zapped;
> + ulong mmu_flooded;
> + ulong mmu_recycled;
> + ulong mmu_cache_miss;
> + ulong mmu_unsync;
> + ulong remote_tlb_flush;
> + ulong lpages;
> };
>
> struct kvm_vcpu_stat {
> - u32 pf_fixed;
> - u32 pf_guest;
> - u32 tlb_flush;
> - u32 invlpg;
> -
> - u32 exits;
> - u32 io_exits;
> - u32 mmio_exits;
> - u32 signal_exits;
> - u32 irq_window_exits;
> - u32 nmi_window_exits;
> - u32 halt_exits;
> - u32 halt_successful_poll;
> - u32 halt_attempted_poll;
> - u32 halt_poll_invalid;
> - u32 halt_wakeup;
> - u32 request_irq_exits;
> - u32 irq_exits;
> - u32 host_state_reload;
> - u32 efer_reload;
> - u32 fpu_reload;
> - u32 insn_emulation;
> - u32 insn_emulation_fail;
> - u32 hypercalls;
> - u32 irq_injections;
> - u32 nmi_injections;
> + u64 pf_fixed;
> + u64 pf_guest;
> + u64 tlb_flush;
> + u64 invlpg;
> +
> + u64 exits;
> + u64 io_exits;
> + u64 mmio_exits;
> + u64 signal_exits;
> + u64 irq_window_exits;
> + u64 nmi_window_exits;
> + u64 halt_exits;
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> + u64 request_irq_exits;
> + u64 irq_exits;
> + u64 host_state_reload;
> + u64 efer_reload;
> + u64 fpu_reload;
> + u64 insn_emulation;
> + u64 insn_emulation_fail;
> + u64 hypercalls;
> + u64 irq_injections;
> + u64 nmi_injections;
> };
>
> struct x86_instruction_info;
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 48bd520..37a6530 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -3531,7 +3531,7 @@ static int vm_stat_get_per_vm(void *data, u64 *val)
> {
> struct kvm_stat_data *stat_data = (struct kvm_stat_data *)data;
>
> - *val = *(u32 *)((void *)stat_data->kvm + stat_data->offset);
> + *val = *(ulong *)((void *)stat_data->kvm + stat_data->offset);
>
> return 0;
> }
> @@ -3561,7 +3561,7 @@ static int vcpu_stat_get_per_vm(void *data, u64 *val)
> *val = 0;
>
> kvm_for_each_vcpu(i, vcpu, stat_data->kvm)
> - *val += *(u32 *)((void *)vcpu + stat_data->offset);
> + *val += *(u64 *)((void *)vcpu + stat_data->offset);
>
> return 0;
> }
> --
> 2.5.5
>
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