[PATCH 1/5] KVM: selftests: Introduce a shared base for test memslots
From: Tharit Tangkijwanichakul
Date: Sat Oct 17 2026 - 07:03:27 EST
Replace hardcoded slot 1 assignments with TEST_MEM_SLOT_BASE
This prepares tests for reserving slot 1 for library use.
Signed-off-by: Tharit Tangkijwanichakul <tharitt97@xxxxxxxxx>
---
tools/testing/selftests/kvm/arm64/hypercalls.c | 3 ++-
tools/testing/selftests/kvm/arm64/sea_to_user.c | 2 +-
tools/testing/selftests/kvm/arm64/stage2_block_transitions.c | 2 +-
tools/testing/selftests/kvm/arm64/vgic_its_save.c | 2 +-
tools/testing/selftests/kvm/arm64/vgic_lpi_stress.c | 2 +-
tools/testing/selftests/kvm/dirty_log_test.c | 2 +-
tools/testing/selftests/kvm/guest_memfd_test.c | 2 +-
tools/testing/selftests/kvm/include/kvm_util.h | 1 +
tools/testing/selftests/kvm/kvm_page_table_test.c | 2 +-
tools/testing/selftests/kvm/mmu_stress_test.c | 2 +-
tools/testing/selftests/kvm/riscv/sbi_pmu_test.c | 3 ++-
tools/testing/selftests/kvm/steal_time.c | 3 ++-
tools/testing/selftests/kvm/x86/nested_dirty_log_test.c | 2 +-
tools/testing/selftests/kvm/x86/nested_vmsave_vmload_test.c | 2 +-
14 files changed, 17 insertions(+), 13 deletions(-)
diff --git a/tools/testing/selftests/kvm/arm64/hypercalls.c b/tools/testing/selftests/kvm/arm64/hypercalls.c
index 391e2ba58b0b..ff7c21738a96 100644
--- a/tools/testing/selftests/kvm/arm64/hypercalls.c
+++ b/tools/testing/selftests/kvm/arm64/hypercalls.c
@@ -191,7 +191,8 @@ static void steal_time_init(struct kvm_vcpu *vcpu)
unsigned int gpages;
gpages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, STEAL_TIME_SIZE);
- vm_userspace_mem_region_add(vcpu->vm, VM_MEM_SRC_ANONYMOUS, ST_GPA_BASE, 1, gpages, 0);
+ vm_userspace_mem_region_add(vcpu->vm, VM_MEM_SRC_ANONYMOUS, ST_GPA_BASE,
+ TEST_MEM_SLOT_BASE, gpages, 0);
vcpu_device_attr_set(vcpu, KVM_ARM_VCPU_PVTIME_CTRL,
KVM_ARM_VCPU_PVTIME_IPA, &st_ipa);
diff --git a/tools/testing/selftests/kvm/arm64/sea_to_user.c b/tools/testing/selftests/kvm/arm64/sea_to_user.c
index d4af6e0eed28..bb552debc61c 100644
--- a/tools/testing/selftests/kvm/arm64/sea_to_user.c
+++ b/tools/testing/selftests/kvm/arm64/sea_to_user.c
@@ -323,7 +323,7 @@ static struct kvm_vm *vm_create_with_sea_handler(struct kvm_vcpu **vcpu)
/*vm=*/vm,
/*src_type=*/src_type,
/*gpa=*/start_gpa,
- /*slot=*/1,
+ /*slot=*/TEST_MEM_SLOT_BASE,
/*npages=*/num_guest_pages,
/*flags=*/0);
diff --git a/tools/testing/selftests/kvm/arm64/stage2_block_transitions.c b/tools/testing/selftests/kvm/arm64/stage2_block_transitions.c
index 5fd47f4ada1f..0e23d7b55782 100644
--- a/tools/testing/selftests/kvm/arm64/stage2_block_transitions.c
+++ b/tools/testing/selftests/kvm/arm64/stage2_block_transitions.c
@@ -41,7 +41,7 @@
#include "test_util.h"
#include "ucall.h"
-#define DATA_SLOT 1
+#define DATA_SLOT TEST_MEM_SLOT_BASE
#define TEST_GVA 0xc0000000UL
#define BLOCK_SIZE SZ_2M
diff --git a/tools/testing/selftests/kvm/arm64/vgic_its_save.c b/tools/testing/selftests/kvm/arm64/vgic_its_save.c
index 864da01539f3..e858a4aa741d 100644
--- a/tools/testing/selftests/kvm/arm64/vgic_its_save.c
+++ b/tools/testing/selftests/kvm/arm64/vgic_its_save.c
@@ -29,7 +29,7 @@
#include "ucall.h"
#include "vgic.h"
-#define TEST_MEMSLOT_INDEX 1
+#define TEST_MEMSLOT_INDEX TEST_MEM_SLOT_BASE
/* All three ITS table entry sizes are 8 bytes in ABI 0. */
#define ESZ 8
diff --git a/tools/testing/selftests/kvm/arm64/vgic_lpi_stress.c b/tools/testing/selftests/kvm/arm64/vgic_lpi_stress.c
index 9a69c439a0f8..1d5c56481053 100644
--- a/tools/testing/selftests/kvm/arm64/vgic_lpi_stress.c
+++ b/tools/testing/selftests/kvm/arm64/vgic_lpi_stress.c
@@ -18,7 +18,7 @@
#include "ucall.h"
#include "vgic.h"
-#define TEST_MEMSLOT_INDEX 1
+#define TEST_MEMSLOT_INDEX TEST_MEM_SLOT_BASE
#define GIC_LPI_OFFSET 8192
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index af5eb0334a74..75084fe3bec6 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -26,7 +26,7 @@
#define PAGE_SHIFT_4K 12
/* The memory slot index to track dirty pages */
-#define TEST_MEM_SLOT_INDEX 1
+#define TEST_MEM_SLOT_INDEX TEST_MEM_SLOT_BASE
/* Default guest test virtual memory offset */
#define DEFAULT_GUEST_TEST_MEM 0xc0000000
diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
index 2233d871a38f..231bfe238e31 100644
--- a/tools/testing/selftests/kvm/guest_memfd_test.c
+++ b/tools/testing/selftests/kvm/guest_memfd_test.c
@@ -510,7 +510,7 @@ static void test_guest_memfd_guest(void)
* the PCI hole and other MMIO regions that need to be avoided.
*/
const gpa_t gpa = SZ_4G;
- const int slot = 1;
+ const int slot = TEST_MEM_SLOT_BASE;
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 5a7a455b5387..759d604d44ce 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -30,6 +30,7 @@
#define KVM_DEV_PATH "/dev/kvm"
#define KVM_MAX_VCPUS 512
+#define TEST_MEM_SLOT_BASE 1
#define NSEC_PER_SEC 1000000000L
diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c
index 974813ea8953..f18720109319 100644
--- a/tools/testing/selftests/kvm/kvm_page_table_test.c
+++ b/tools/testing/selftests/kvm/kvm_page_table_test.c
@@ -20,7 +20,7 @@
#include "guest_modes.h"
#include "ucall_common.h"
-#define TEST_MEM_SLOT_INDEX 1
+#define TEST_MEM_SLOT_INDEX TEST_MEM_SLOT_BASE
/* Default size(1GB) of the memory for testing */
#define DEFAULT_TEST_MEM_SIZE (1 << 30)
diff --git a/tools/testing/selftests/kvm/mmu_stress_test.c b/tools/testing/selftests/kvm/mmu_stress_test.c
index 741e343962ed..b965a8b9d214 100644
--- a/tools/testing/selftests/kvm/mmu_stress_test.c
+++ b/tools/testing/selftests/kvm/mmu_stress_test.c
@@ -273,7 +273,7 @@ int main(int argc, char *argv[])
* 1gb-3gb,but it's simpler to skip straight to 4gb.
*/
const u64 start_gpa = SZ_4G;
- const int first_slot = 1;
+ const int first_slot = TEST_MEM_SLOT_BASE;
struct timespec time_start, time_run1, time_reset, time_run2, time_ro, time_rw;
u64 max_gpa, gpa, slot_size, max_mem, i;
diff --git a/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c b/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c
index 20388f0b959d..6abd74870e01 100644
--- a/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c
+++ b/tools/testing/selftests/kvm/riscv/sbi_pmu_test.c
@@ -605,7 +605,8 @@ static void test_vm_events_test(void *guest_code)
static void test_vm_setup_snapshot_mem(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
{
/* PMU Snapshot requires single page only */
- vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, PMU_SNAPSHOT_GPA_BASE, 1, 1, 0);
+ vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, PMU_SNAPSHOT_GPA_BASE,
+ TEST_MEM_SLOT_BASE, 1, 0);
/* PMU_SNAPSHOT_GPA_BASE is identity mapped */
virt_map(vm, PMU_SNAPSHOT_GPA_BASE, PMU_SNAPSHOT_GPA_BASE, 1);
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
index 785d19f9ee8f..e386580ef540 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -509,7 +509,8 @@ static struct kvm_vm *vm_create_steal_time(u32 nr_vcpus, void *guest_code,
/* Create a VM and an identity mapped memslot for the steal time structure */
vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
gpages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, STEAL_TIME_SIZE * nr_vcpus);
- vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, ST_GPA_BASE, 1, gpages, 0);
+ vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, ST_GPA_BASE,
+ TEST_MEM_SLOT_BASE, gpages, 0);
virt_map(vm, ST_GPA_BASE, ST_GPA_BASE, gpages);
return vm;
diff --git a/tools/testing/selftests/kvm/x86/nested_dirty_log_test.c b/tools/testing/selftests/kvm/x86/nested_dirty_log_test.c
index 26b474bf1353..e86d625b3e89 100644
--- a/tools/testing/selftests/kvm/x86/nested_dirty_log_test.c
+++ b/tools/testing/selftests/kvm/x86/nested_dirty_log_test.c
@@ -16,7 +16,7 @@
#include "vmx.h"
/* The memory slot index to track dirty pages */
-#define TEST_MEM_SLOT_INDEX 1
+#define TEST_MEM_SLOT_INDEX TEST_MEM_SLOT_BASE
/*
* Allocate four pages total. Two pages are used to verify that the KVM marks
diff --git a/tools/testing/selftests/kvm/x86/nested_vmsave_vmload_test.c b/tools/testing/selftests/kvm/x86/nested_vmsave_vmload_test.c
index a130759f39a1..4bc57e5e40e3 100644
--- a/tools/testing/selftests/kvm/x86/nested_vmsave_vmload_test.c
+++ b/tools/testing/selftests/kvm/x86/nested_vmsave_vmload_test.c
@@ -17,7 +17,7 @@
* interpreted as a direct L1 GPA or translated using NPT as an L2 GPA, depends
* on which VMCB is accessed.
*/
-#define TEST_MEM_SLOT_INDEX 1
+#define TEST_MEM_SLOT_INDEX TEST_MEM_SLOT_BASE
#define TEST_MEM_PAGES 2
#define TEST_MEM_BASE 0xc0000000
--
2.53.0