From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Ben Gardon <bgardon@google.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
linux-kselftest@vger.kernel.org
Cc: Cannon Matthews <cannonmatthews@google.com>,
Peter Xu <peterx@redhat.com>, Andrew Jones <drjones@redhat.com>,
Peter Shier <pshier@google.com>, Oliver Upton <oupton@google.com>,
Marc Zyngier <Marc.Zyngier@arm.com>,
Cornelia Huck <cohuck@redhat.com>, Thomas Huth <thuth@redhat.com>
Subject: Re: [PATCH v4 06/10] KVM: selftests: Add support for vcpu_args_set to aarch64 and s390x
Date: Fri, 24 Jan 2020 19:33:27 +0100 [thread overview]
Message-ID: <f1a56d20-823b-e878-e903-ff87b3c51229@de.ibm.com> (raw)
In-Reply-To: <4dbb6d1b-3162-d9b3-4ebb-5e4061776bb6@redhat.com>
On 24.01.20 10:03, Paolo Bonzini wrote:
> CCing Marc, Conny and Christian (plus Thomas and Drew who were already
> in the list) for review.
CC Thomas Huth,
>
> Thanks,
>
> Paolo
>
> On 23/01/20 19:04, Ben Gardon wrote:
>> Currently vcpu_args_set is only implemented for x86. This makes writing
>> tests with multiple vCPUs difficult as each guest vCPU must either a.)
>> do the same thing or b.) derive some kind of unique token from it's
>> registers or the architecture. To simplify the process of writing tests
>> with multiple vCPUs for s390 and aarch64, add set args functions for
>> those architectures.
[...]
>> .../selftests/kvm/lib/s390x/processor.c | 35 +++++++++++++++++++
[...]
>> --- a/tools/testing/selftests/kvm/lib/s390x/processor.c
>> +++ b/tools/testing/selftests/kvm/lib/s390x/processor.c
>> @@ -269,6 +269,41 @@ void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
>> run->psw_addr = (uintptr_t)guest_code;
>> }
>>
>> +/* VM VCPU Args Set
>> + *
>> + * Input Args:
>> + * vm - Virtual Machine
>> + * vcpuid - VCPU ID
>> + * num - number of arguments
>> + * ... - arguments, each of type uint64_t
>> + *
>> + * Output Args: None
>> + *
>> + * Return: None
>> + *
>> + * Sets the first num function input arguments to the values
>> + * given as variable args. Each of the variable args is expected to
>> + * be of type uint64_t. The registers set by this function are r2-r6.
>> + */
>> +void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...)
>> +{
>> + va_list ap;
>> + struct kvm_regs regs;
>> +
>> + TEST_ASSERT(num >= 1 && num <= 5, "Unsupported number of args,\n"
>> + " num: %u\n",
>> + num);
>> +
>> + va_start(ap, num);
>> + vcpu_regs_get(vm, vcpuid, ®s);
>> +
>> + for (i = 0; i < num; i++)
>> + regs.gprs[i + 2] = va_arg(ap, uint64_t);
>> +
>> + vcpu_regs_set(vm, vcpuid, ®s);
>> + va_end(ap);
>> +}
>> +
>> void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent)
>> {
>> struct vcpu *vcpu = vm->vcpu_head;
>>
>
Untested but the logic looks sane according to the ELF ABI.
next prev parent reply other threads:[~2020-01-24 18:36 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 18:04 [PATCH v4 00/10] Create a userfaultfd demand paging test Ben Gardon
2020-01-23 18:04 ` [PATCH v4 01/10] KVM: selftests: Create a " Ben Gardon
2020-01-24 9:49 ` Andrew Jones
2020-01-27 9:18 ` Thomas Huth
2020-01-23 18:04 ` [PATCH v4 02/10] KVM: selftests: Add demand paging content to the " Ben Gardon
2020-01-23 18:04 ` [PATCH v4 03/10] KVM: selftests: Add configurable demand paging delay Ben Gardon
2020-01-23 18:04 ` [PATCH v4 04/10] KVM: selftests: Add memory size parameter to the demand paging test Ben Gardon
2020-01-24 10:01 ` Andrew Jones
2020-01-23 18:04 ` [PATCH v4 05/10] KVM: selftests: Pass args to vCPU in global vCPU args struct Ben Gardon
2020-01-23 18:04 ` [PATCH v4 06/10] KVM: selftests: Add support for vcpu_args_set to aarch64 and s390x Ben Gardon
2020-01-24 9:03 ` Paolo Bonzini
2020-01-24 9:35 ` Andrew Jones
2020-01-24 9:44 ` Paolo Bonzini
2020-01-24 10:45 ` Andrew Jones
2020-01-24 18:33 ` Christian Borntraeger [this message]
2020-01-25 9:34 ` Paolo Bonzini
2020-01-27 8:38 ` Andrew Jones
2020-01-27 9:01 ` Thomas Huth
2020-01-23 18:04 ` [PATCH v4 07/10] KVM: selftests: Support multiple vCPUs in demand paging test Ben Gardon
2020-01-24 10:16 ` Andrew Jones
2020-01-24 10:49 ` Andrew Jones
2020-01-25 9:39 ` Paolo Bonzini
2020-01-27 8:39 ` Andrew Jones
2020-01-23 18:04 ` [PATCH v4 08/10] KVM: selftests: Time guest demand paging Ben Gardon
2020-01-24 10:21 ` Andrew Jones
2020-01-23 18:04 ` [PATCH v4 09/10] KVM: selftests: Stop memslot creation in KVM internal memslot region Ben Gardon
2020-01-24 8:58 ` Paolo Bonzini
2020-01-24 18:41 ` Ben Gardon
2020-01-25 9:37 ` Paolo Bonzini
2020-01-27 17:28 ` Ben Gardon
2020-01-23 18:04 ` [PATCH v4 10/10] KVM: selftests: Move memslot 0 above KVM internal memslots Ben Gardon
2020-01-24 9:01 ` Paolo Bonzini
2020-01-24 18:53 ` Ben Gardon
2020-01-27 9:42 ` Thomas Huth
2020-01-24 9:03 ` [PATCH v4 00/10] Create a userfaultfd demand paging test Paolo Bonzini
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