From d4ec586c60ab978554245c58cf432df444c93b4e Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Tue, 6 Jun 2023 17:12:26 -0700 Subject: KVM: selftests: Allow specify physical cpu list in demand paging test Mimic the dirty log test and allow the user to pin demand paging test tasks to physical CPUs. Put the help message into a general helper as suggested by Sean. Signed-off-by: Peter Xu [sean: rebase, tweak arg ordering, add "print" to helper, print program name] Link: https://lore.kernel.org/r/20230607001226.1398889-1-seanjc@google.com Signed-off-by: Sean Christopherson --- tools/testing/selftests/kvm/lib/kvm_util.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'tools/testing/selftests/kvm/lib/kvm_util.c') diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 298c4372fb1a..9741a7ff6380 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -494,6 +494,23 @@ static uint32_t parse_pcpu(const char *cpu_str, const cpu_set_t *allowed_mask) return pcpu; } +void kvm_print_vcpu_pinning_help(void) +{ + const char *name = program_invocation_name; + + printf(" -c: Pin tasks to physical CPUs. Takes a list of comma separated\n" + " values (target pCPU), one for each vCPU, plus an optional\n" + " entry for the main application task (specified via entry\n" + " ). If used, entries must be provided for all\n" + " vCPUs, i.e. pinning vCPUs is all or nothing.\n\n" + " E.g. to create 3 vCPUs, pin vCPU0=>pCPU22, vCPU1=>pCPU23,\n" + " vCPU2=>pCPU24, and pin the application task to pCPU50:\n\n" + " %s -v 3 -c 22,23,24,50\n\n" + " To leave the application task unpinned, drop the final entry:\n\n" + " %s -v 3 -c 22,23,24\n\n" + " (default: no pinning)\n", name, name); +} + void kvm_parse_vcpu_pinning(const char *pcpus_string, uint32_t vcpu_to_pcpu[], int nr_vcpus) { -- cgit