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Message-ID: <ec789dfb-e447-4cc5-bd72-7ee8bf5a5daa@collabora.com>
Date: Fri, 26 Apr 2024 19:03:07 +0500
From: Muhammad Usama Anjum <usama.anjum@...labora.com>
To: Thomas Huth <thuth@...hat.com>, kvm@...r.kernel.org,
Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <seanjc@...gle.com>
Cc: Muhammad Usama Anjum <usama.anjum@...labora.com>,
linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH v2] KVM: selftests: Use TAP interface in the
set_memory_region test
On 4/26/24 4:45 PM, Thomas Huth wrote:
> Use the kselftest_harness.h interface in this test to get TAP
> output, so that it is easier for the user to see what the test
> is doing. (Note: We are not using the KVM_ONE_VCPU_TEST_SUITE()
> macro here since these tests are creating their VMs with the
> vm_create_barebones() function, not with vm_create_with_one_vcpu())
>
> Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
> Signed-off-by: Thomas Huth <thuth@...hat.com>
LGTM
Reviewed-by: Muhammad Usama Anjum <usama.anjum@...abora.com>
Tested-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---
> v2:
> - Rebase to linux-next branch
> - Make "loops" variable static
> - Added Andrew's Reviewed-by
>
> .../selftests/kvm/set_memory_region_test.c | 86 +++++++++----------
> 1 file changed, 42 insertions(+), 44 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> index 68c899d27561..a5c9bee5235a 100644
> --- a/tools/testing/selftests/kvm/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -16,6 +16,7 @@
> #include <test_util.h>
> #include <kvm_util.h>
> #include <processor.h>
> +#include "kselftest_harness.h"
>
> /*
> * s390x needs at least 1MB alignment, and the x86_64 MOVE/DELETE tests need a
> @@ -38,6 +39,8 @@ extern const uint64_t final_rip_end;
>
> static sem_t vcpu_ready;
>
> +static int loops;
> +
> static inline uint64_t guest_spin_on_val(uint64_t spin_val)
> {
> uint64_t val;
> @@ -219,6 +222,13 @@ static void test_move_memory_region(void)
> kvm_vm_free(vm);
> }
>
> +TEST(move_in_use_region)
> +{
> + ksft_print_msg("Testing MOVE of in-use region, %d loops\n", loops);
> + for (int i = 0; i < loops; i++)
> + test_move_memory_region();
> +}
> +
> static void guest_code_delete_memory_region(void)
> {
> uint64_t val;
> @@ -308,12 +318,19 @@ static void test_delete_memory_region(void)
> kvm_vm_free(vm);
> }
>
> -static void test_zero_memory_regions(void)
> +TEST(delete_in_use_region)
> +{
> + ksft_print_msg("Testing DELETE of in-use region, %d loops\n", loops);
> + for (int i = 0; i < loops; i++)
> + test_delete_memory_region();
> +}
> +
> +TEST(zero_memory_regions)
> {
> struct kvm_vcpu *vcpu;
> struct kvm_vm *vm;
>
> - pr_info("Testing KVM_RUN with zero added memory regions\n");
> + ksft_print_msg("Testing KVM_RUN with zero added memory regions\n");
>
> vm = vm_create_barebones();
> vcpu = __vm_vcpu_add(vm, 0);
> @@ -326,7 +343,7 @@ static void test_zero_memory_regions(void)
> }
> #endif /* __x86_64__ */
>
> -static void test_invalid_memory_region_flags(void)
> +TEST(invalid_memory_region_flags)
> {
> uint32_t supported_flags = KVM_MEM_LOG_DIRTY_PAGES;
> const uint32_t v2_only_flags = KVM_MEM_GUEST_MEMFD;
> @@ -389,7 +406,7 @@ static void test_invalid_memory_region_flags(void)
> * Test it can be added memory slots up to KVM_CAP_NR_MEMSLOTS, then any
> * tentative to add further slots should fail.
> */
> -static void test_add_max_memory_regions(void)
> +TEST(add_max_memory_regions)
> {
> int ret;
> struct kvm_vm *vm;
> @@ -408,13 +425,13 @@ static void test_add_max_memory_regions(void)
> max_mem_slots = kvm_check_cap(KVM_CAP_NR_MEMSLOTS);
> TEST_ASSERT(max_mem_slots > 0,
> "KVM_CAP_NR_MEMSLOTS should be greater than 0");
> - pr_info("Allowed number of memory slots: %i\n", max_mem_slots);
> + ksft_print_msg("Allowed number of memory slots: %i\n", max_mem_slots);
>
> vm = vm_create_barebones();
>
> /* Check it can be added memory slots up to the maximum allowed */
> - pr_info("Adding slots 0..%i, each memory region with %dK size\n",
> - (max_mem_slots - 1), MEM_REGION_SIZE >> 10);
> + ksft_print_msg("Adding slots 0..%i, each memory region with %dK size\n",
> + (max_mem_slots - 1), MEM_REGION_SIZE >> 10);
>
> mem = mmap(NULL, (size_t)max_mem_slots * MEM_REGION_SIZE + alignment,
> PROT_READ | PROT_WRITE,
> @@ -455,12 +472,21 @@ static void test_invalid_guest_memfd(struct kvm_vm *vm, int memfd,
> TEST_ASSERT(r == -1 && errno == EINVAL, "%s", msg);
> }
>
> -static void test_add_private_memory_region(void)
> +static bool has_cap_guest_memfd(void)
> +{
> + return kvm_has_cap(KVM_CAP_GUEST_MEMFD) &&
> + (kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM));
> +}
> +
> +TEST(add_private_memory_region)
> {
> struct kvm_vm *vm, *vm2;
> int memfd, i;
>
> - pr_info("Testing ADD of KVM_MEM_GUEST_MEMFD memory regions\n");
> + if (!has_cap_guest_memfd())
> + SKIP(return, "Missing KVM_MEM_GUEST_MEMFD / KVM_X86_SW_PROTECTED_VM");
> +
> + ksft_print_msg("Testing ADD of KVM_MEM_GUEST_MEMFD memory regions\n");
>
> vm = vm_create_barebones_type(KVM_X86_SW_PROTECTED_VM);
>
> @@ -491,13 +517,16 @@ static void test_add_private_memory_region(void)
> kvm_vm_free(vm);
> }
>
> -static void test_add_overlapping_private_memory_regions(void)
> +TEST(add_overlapping_private_memory_regions)
> {
> struct kvm_vm *vm;
> int memfd;
> int r;
>
> - pr_info("Testing ADD of overlapping KVM_MEM_GUEST_MEMFD memory regions\n");
> + if (!has_cap_guest_memfd())
> + SKIP(return, "Missing KVM_MEM_GUEST_MEMFD / KVM_X86_SW_PROTECTED_VM");
> +
> + ksft_print_msg("Testing ADD of overlapping KVM_MEM_GUEST_MEMFD memory regions\n");
>
> vm = vm_create_barebones_type(KVM_X86_SW_PROTECTED_VM);
>
> @@ -536,46 +565,15 @@ static void test_add_overlapping_private_memory_regions(void)
> close(memfd);
> kvm_vm_free(vm);
> }
> +
> #endif
>
> int main(int argc, char *argv[])
> {
> -#ifdef __x86_64__
> - int i, loops;
> -
> - /*
> - * FIXME: the zero-memslot test fails on aarch64 and s390x because
> - * KVM_RUN fails with ENOEXEC or EFAULT.
> - */
> - test_zero_memory_regions();
> -#endif
> -
> - test_invalid_memory_region_flags();
> -
> - test_add_max_memory_regions();
> -
> -#ifdef __x86_64__
> - if (kvm_has_cap(KVM_CAP_GUEST_MEMFD) &&
> - (kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM))) {
> - test_add_private_memory_region();
> - test_add_overlapping_private_memory_regions();
> - } else {
> - pr_info("Skipping tests for KVM_MEM_GUEST_MEMFD memory regions\n");
> - }
> -
> if (argc > 1)
> loops = atoi_positive("Number of iterations", argv[1]);
> else
> loops = 10;
>
> - pr_info("Testing MOVE of in-use region, %d loops\n", loops);
> - for (i = 0; i < loops; i++)
> - test_move_memory_region();
> -
> - pr_info("Testing DELETE of in-use region, %d loops\n", loops);
> - for (i = 0; i < loops; i++)
> - test_delete_memory_region();
> -#endif
> -
> - return 0;
> + return test_harness_run(argc, argv);
> }
--
BR,
Muhammad Usama Anjum
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