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KVM: s390: Add signal_exits counter

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Add a signal_exits counter for s390, as exists on arm64, loongarch, mips,
powerpc, riscv and x86.

This is used by kvm_handle_signal_exit(), which we will use when we
later enable CONFIG_VIRT_XFER_TO_GUEST_WORK.

Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
This commit is contained in:
Andrew Donnellan 2025-11-26 16:33:10 +11:00 committed by Janosch Frank
parent 44acac00be
commit c067847c52
2 changed files with 4 additions and 1 deletions
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1
arch/s390/include/asm/kvm_host.h
View File

@ -146,6 +146,7 @@ struct kvm_vcpu_stat {
u64 instruction_diagnose_500;
u64 instruction_diagnose_other;
u64 pfault_sync;
u64 signal_exits;
};
#define PGM_OPERATION 0x01

4
arch/s390/kvm/kvm-s390.c
View File

@ -185,7 +185,8 @@ const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
STATS_DESC_COUNTER(VCPU, instruction_diagnose_308),
STATS_DESC_COUNTER(VCPU, instruction_diagnose_500),
STATS_DESC_COUNTER(VCPU, instruction_diagnose_other),
STATS_DESC_COUNTER(VCPU, pfault_sync)
STATS_DESC_COUNTER(VCPU, pfault_sync),
STATS_DESC_COUNTER(VCPU, signal_exits)
};
const struct kvm_stats_header kvm_vcpu_stats_header = {
@ -5251,6 +5252,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
if (signal_pending(current) && !rc) {
kvm_run->exit_reason = KVM_EXIT_INTR;
vcpu->stat.signal_exits++;
rc = -EINTR;
}