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Date: Thu, 1 Dec 2022 17:28:13 +0100
From: Claudio Imbrenda <imbrenda@...ux.ibm.com>
To: Janis Schoetterl-Glausch <scgl@...ux.ibm.com>
Cc: Christian Borntraeger <borntraeger@...ux.ibm.com>,
Janosch Frank <frankja@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
David Hildenbrand <david@...hat.com>,
Jonathan Corbet <corbet@....net>, kvm@...r.kernel.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-s390@...r.kernel.org,
Paolo Bonzini <pbonzini@...hat.com>,
Shuah Khan <shuah@...nel.org>,
Sven Schnelle <svens@...ux.ibm.com>
Subject: Re: [PATCH v3 4/9] KVM: s390: selftest: memop: Replace macros by
functions
On Thu, 17 Nov 2022 23:17:53 +0100
Janis Schoetterl-Glausch <scgl@...ux.ibm.com> wrote:
> Replace the DEFAULT_* test helpers by functions, as they don't
> need the exta flexibility.
>
> Signed-off-by: Janis Schoetterl-Glausch <scgl@...ux.ibm.com>
> ---
> tools/testing/selftests/kvm/s390x/memop.c | 82 +++++++++++------------
> 1 file changed, 39 insertions(+), 43 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c
> index 69869c7e2ab1..286185a59238 100644
> --- a/tools/testing/selftests/kvm/s390x/memop.c
> +++ b/tools/testing/selftests/kvm/s390x/memop.c
> @@ -48,6 +48,8 @@ struct mop_desc {
> uint8_t key;
> };
>
> +const uint8_t NO_KEY = 0xff;
> +
> static struct kvm_s390_mem_op ksmo_from_desc(const struct mop_desc *desc)
> {
> struct kvm_s390_mem_op ksmo = {
> @@ -85,7 +87,7 @@ static struct kvm_s390_mem_op ksmo_from_desc(const struct mop_desc *desc)
> ksmo.flags |= KVM_S390_MEMOP_F_INJECT_EXCEPTION;
> if (desc->_set_flags)
> ksmo.flags = desc->set_flags;
> - if (desc->f_key) {
> + if (desc->f_key && desc->key != NO_KEY) {
is this change going to affect the behaviour?
if so, please document it in the patch description
> ksmo.flags |= KVM_S390_MEMOP_F_SKEY_PROTECTION;
> ksmo.key = desc->key;
> }
> @@ -268,34 +270,28 @@ static void prepare_mem12(void)
> #define ASSERT_MEM_EQ(p1, p2, size) \
> TEST_ASSERT(!memcmp(p1, p2, size), "Memory contents do not match!")
>
> -#define DEFAULT_WRITE_READ(copy_cpu, mop_cpu, mop_target_p, size, ...) \
> -({ \
> - struct test_info __copy_cpu = (copy_cpu), __mop_cpu = (mop_cpu); \
> - enum mop_target __target = (mop_target_p); \
> - uint32_t __size = (size); \
> - \
> - prepare_mem12(); \
> - CHECK_N_DO(MOP, __mop_cpu, __target, WRITE, mem1, __size, \
> - GADDR_V(mem1), ##__VA_ARGS__); \
> - HOST_SYNC(__copy_cpu, STAGE_COPIED); \
> - CHECK_N_DO(MOP, __mop_cpu, __target, READ, mem2, __size, \
> - GADDR_V(mem2), ##__VA_ARGS__); \
> - ASSERT_MEM_EQ(mem1, mem2, __size); \
> -})
> +static void default_write_read(struct test_info copy_cpu, struct test_info mop_cpu,
> + enum mop_target mop_target, uint32_t size, uint8_t key)
> +{
> + prepare_mem12();
> + CHECK_N_DO(MOP, mop_cpu, mop_target, WRITE, mem1, size,
> + GADDR_V(mem1), KEY(key));
> + HOST_SYNC(copy_cpu, STAGE_COPIED);
> + CHECK_N_DO(MOP, mop_cpu, mop_target, READ, mem2, size,
> + GADDR_V(mem2), KEY(key));
> + ASSERT_MEM_EQ(mem1, mem2, size);
> +}
>
> -#define DEFAULT_READ(copy_cpu, mop_cpu, mop_target_p, size, ...) \
> -({ \
> - struct test_info __copy_cpu = (copy_cpu), __mop_cpu = (mop_cpu); \
> - enum mop_target __target = (mop_target_p); \
> - uint32_t __size = (size); \
> - \
> - prepare_mem12(); \
> - CHECK_N_DO(MOP, __mop_cpu, __target, WRITE, mem1, __size, \
> - GADDR_V(mem1)); \
> - HOST_SYNC(__copy_cpu, STAGE_COPIED); \
> - CHECK_N_DO(MOP, __mop_cpu, __target, READ, mem2, __size, ##__VA_ARGS__);\
> - ASSERT_MEM_EQ(mem1, mem2, __size); \
> -})
> +static void default_read(struct test_info copy_cpu, struct test_info mop_cpu,
> + enum mop_target mop_target, uint32_t size, uint8_t key)
> +{
> + prepare_mem12();
> + CHECK_N_DO(MOP, mop_cpu, mop_target, WRITE, mem1, size, GADDR_V(mem1));
> + HOST_SYNC(copy_cpu, STAGE_COPIED);
> + CHECK_N_DO(MOP, mop_cpu, mop_target, READ, mem2, size,
> + GADDR_V(mem2), KEY(key));
> + ASSERT_MEM_EQ(mem1, mem2, size);
> +}
>
> static void guest_copy(void)
> {
> @@ -310,7 +306,7 @@ static void test_copy(void)
>
> HOST_SYNC(t.vcpu, STAGE_INITED);
>
> - DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size);
> + default_write_read(t.vcpu, t.vcpu, LOGICAL, t.size, NO_KEY);
>
> kvm_vm_free(t.kvm_vm);
> }
> @@ -357,26 +353,26 @@ static void test_copy_key(void)
> HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
>
> /* vm, no key */
> - DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, t.size);
> + default_write_read(t.vcpu, t.vm, ABSOLUTE, t.size, NO_KEY);
>
> /* vm/vcpu, machting key or key 0 */
> - DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(0));
> - DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(9));
> - DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, t.size, KEY(0));
> - DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, t.size, KEY(9));
> + default_write_read(t.vcpu, t.vcpu, LOGICAL, t.size, 0);
> + default_write_read(t.vcpu, t.vcpu, LOGICAL, t.size, 9);
> + default_write_read(t.vcpu, t.vm, ABSOLUTE, t.size, 0);
> + default_write_read(t.vcpu, t.vm, ABSOLUTE, t.size, 9);
> /*
> * There used to be different code paths for key handling depending on
> * if the region crossed a page boundary.
> * There currently are not, but the more tests the merrier.
> */
> - DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, 1, KEY(0));
> - DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, 1, KEY(9));
> - DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, 1, KEY(0));
> - DEFAULT_WRITE_READ(t.vcpu, t.vm, ABSOLUTE, 1, KEY(9));
> + default_write_read(t.vcpu, t.vcpu, LOGICAL, 1, 0);
> + default_write_read(t.vcpu, t.vcpu, LOGICAL, 1, 9);
> + default_write_read(t.vcpu, t.vm, ABSOLUTE, 1, 0);
> + default_write_read(t.vcpu, t.vm, ABSOLUTE, 1, 9);
>
> /* vm/vcpu, mismatching keys on read, but no fetch protection */
> - DEFAULT_READ(t.vcpu, t.vcpu, LOGICAL, t.size, GADDR_V(mem2), KEY(2));
> - DEFAULT_READ(t.vcpu, t.vm, ABSOLUTE, t.size, GADDR_V(mem1), KEY(2));
> + default_read(t.vcpu, t.vcpu, LOGICAL, t.size, 2);
> + default_read(t.vcpu, t.vm, ABSOLUTE, t.size, 2);
>
> kvm_vm_free(t.kvm_vm);
> }
> @@ -409,7 +405,7 @@ static void test_copy_key_storage_prot_override(void)
> HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
>
> /* vcpu, mismatching keys, storage protection override in effect */
> - DEFAULT_WRITE_READ(t.vcpu, t.vcpu, LOGICAL, t.size, KEY(2));
> + default_write_read(t.vcpu, t.vcpu, LOGICAL, t.size, 2);
>
> kvm_vm_free(t.kvm_vm);
> }
> @@ -422,8 +418,8 @@ static void test_copy_key_fetch_prot(void)
> HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
>
> /* vm/vcpu, matching key, fetch protection in effect */
> - DEFAULT_READ(t.vcpu, t.vcpu, LOGICAL, t.size, GADDR_V(mem2), KEY(9));
> - DEFAULT_READ(t.vcpu, t.vm, ABSOLUTE, t.size, GADDR_V(mem2), KEY(9));
> + default_read(t.vcpu, t.vcpu, LOGICAL, t.size, 9);
> + default_read(t.vcpu, t.vm, ABSOLUTE, t.size, 9);
>
> kvm_vm_free(t.kvm_vm);
> }
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