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KVM: selftests: Use non-atomic clear/set bit helpers in KVM tests

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Use the dedicated non-atomic helpers for {clear,set}_bit() and their
test variants, i.e. the double-underscore versions.  Depsite being
defined in atomic.h, and despite the kernel versions being atomic in the
kernel, tools' {clear,set}_bit() helpers aren't actually atomic.  Move
to the double-underscore versions so that the versions that are expected
to be atomic (for kernel developers) can be made atomic without affecting
users that don't want atomic operations.

Leave the usage in ucall_free() as-is, it's the one place in tools/ that
actually wants/needs atomic behavior.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221119013450.2643007-7-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2022-11-19 01:34:47 +00:00 committed by Paolo Bonzini
parent 75d7ba32f9
commit 03a0c819e7
4 changed files with 22 additions and 22 deletions
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2
tools/testing/selftests/kvm/aarch64/arch_timer.c
View File

@ -222,7 +222,7 @@ static void *test_vcpu_run(void *arg)
/* Currently, any exit from guest is an indication of completion */
pthread_mutex_lock(&vcpu_done_map_lock);
set_bit(vcpu_idx, vcpu_done_map);
__set_bit(vcpu_idx, vcpu_done_map);
pthread_mutex_unlock(&vcpu_done_map_lock);
switch (get_ucall(vcpu, &uc)) {

34
tools/testing/selftests/kvm/dirty_log_test.c
View File

@ -44,20 +44,20 @@
# define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
# define test_bit_le(nr, addr) \
test_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define set_bit_le(nr, addr) \
set_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define clear_bit_le(nr, addr) \
clear_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define test_and_set_bit_le(nr, addr) \
test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define test_and_clear_bit_le(nr, addr) \
test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define __set_bit_le(nr, addr) \
__set_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define __clear_bit_le(nr, addr) \
__clear_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define __test_and_set_bit_le(nr, addr) \
__test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
# define __test_and_clear_bit_le(nr, addr) \
__test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, addr)
#else
# define test_bit_le test_bit
# define set_bit_le set_bit
# define clear_bit_le clear_bit
# define test_and_set_bit_le test_and_set_bit
# define test_and_clear_bit_le test_and_clear_bit
# define test_bit_le test_bit
# define __set_bit_le __set_bit
# define __clear_bit_le __clear_bit
# define __test_and_set_bit_le __test_and_set_bit
# define __test_and_clear_bit_le __test_and_clear_bit
#endif
#define TEST_DIRTY_RING_COUNT 65536
@ -305,7 +305,7 @@ static uint32_t dirty_ring_collect_one(struct kvm_dirty_gfn *dirty_gfns,
TEST_ASSERT(cur->offset < num_pages, "Offset overflow: "
"0x%llx >= 0x%x", cur->offset, num_pages);
//pr_info("fetch 0x%x page %llu\n", *fetch_index, cur->offset);
set_bit_le(cur->offset, bitmap);
__set_bit_le(cur->offset, bitmap);
dirty_ring_last_page = cur->offset;
dirty_gfn_set_collected(cur);
(*fetch_index)++;
@ -560,7 +560,7 @@ static void vm_dirty_log_verify(enum vm_guest_mode mode, unsigned long *bmap)
value_ptr = host_test_mem + page * host_page_size;
/* If this is a special page that we were tracking... */
if (test_and_clear_bit_le(page, host_bmap_track)) {
if (__test_and_clear_bit_le(page, host_bmap_track)) {
host_track_next_count++;
TEST_ASSERT(test_bit_le(page, bmap),
"Page %"PRIu64" should have its dirty bit "
@ -568,7 +568,7 @@ static void vm_dirty_log_verify(enum vm_guest_mode mode, unsigned long *bmap)
page);
}
if (test_and_clear_bit_le(page, bmap)) {
if (__test_and_clear_bit_le(page, bmap)) {
bool matched;
host_dirty_count++;
@ -661,7 +661,7 @@ static void vm_dirty_log_verify(enum vm_guest_mode mode, unsigned long *bmap)
* should report its dirtyness in the
* next run
*/
set_bit_le(page, host_bmap_track);
__set_bit_le(page, host_bmap_track);
}
}
}

4
tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c
View File

@ -142,7 +142,7 @@ void guest_code(struct vmx_pages *vmx_pages, struct hyperv_test_pages *hv_pages,
/* Intercept RDMSR 0xc0000100 */
vmwrite(CPU_BASED_VM_EXEC_CONTROL, vmreadz(CPU_BASED_VM_EXEC_CONTROL) |
CPU_BASED_USE_MSR_BITMAPS);
set_bit(MSR_FS_BASE & 0x1fff, vmx_pages->msr + 0x400);
__set_bit(MSR_FS_BASE & 0x1fff, vmx_pages->msr + 0x400);
GUEST_ASSERT(!vmresume());
GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ);
current_evmcs->guest_rip += 2; /* rdmsr */
@ -154,7 +154,7 @@ void guest_code(struct vmx_pages *vmx_pages, struct hyperv_test_pages *hv_pages,
current_evmcs->guest_rip += 2; /* rdmsr */
/* Intercept RDMSR 0xc0000101 without telling KVM about it */
set_bit(MSR_GS_BASE & 0x1fff, vmx_pages->msr + 0x400);
__set_bit(MSR_GS_BASE & 0x1fff, vmx_pages->msr + 0x400);
/* Make sure HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP is set */
current_evmcs->hv_clean_fields |= HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
GUEST_ASSERT(!vmresume());

4
tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c
View File

@ -103,7 +103,7 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm,
/* Intercept RDMSR 0xc0000100 */
vmcb->control.intercept |= 1ULL << INTERCEPT_MSR_PROT;
set_bit(2 * (MSR_FS_BASE & 0x1fff), svm->msr + 0x800);
__set_bit(2 * (MSR_FS_BASE & 0x1fff), svm->msr + 0x800);
run_guest(vmcb, svm->vmcb_gpa);
GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_MSR);
vmcb->save.rip += 2; /* rdmsr */
@ -115,7 +115,7 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm,
vmcb->save.rip += 2; /* rdmsr */
/* Intercept RDMSR 0xc0000101 without telling KVM about it */
set_bit(2 * (MSR_GS_BASE & 0x1fff), svm->msr + 0x800);
__set_bit(2 * (MSR_GS_BASE & 0x1fff), svm->msr + 0x800);
/* Make sure HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP is set */
vmcb->control.clean |= HV_VMCB_NESTED_ENLIGHTENMENTS;
run_guest(vmcb, svm->vmcb_gpa);