KVM: selftests: Extend vmx_tsc_adjust_test to cover SVM

Add SVM L1 code to run the nested guest, and allow the test to run with
SVM as well as VMX.

Reviewed-by: Jim Mattson <jmattson@google.com>

Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Link: https://patch.msgid.link/20251021074736.1324328-8-yosry.ahmed@linux.dev
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 0 insertions, 146 deletions

diff --git a/tools/testing/selftests/kvm/x86/vmx_tsc_adjust_test.c b/tools/testing/selftests/kvm/x86/vmx_tsc_adjust_test.c
deleted file mode 100644
index 2dcc0306a0d9..000000000000
--- a/tools/testing/selftests/kvm/x86/vmx_tsc_adjust_test.c
+++ /dev/null
@@ -1,146 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * vmx_tsc_adjust_test
- *
- * Copyright (C) 2018, Google LLC.
- *
- * IA32_TSC_ADJUST test
- *
- * According to the SDM, "if an execution of WRMSR to the
- * IA32_TIME_STAMP_COUNTER MSR adds (or subtracts) value X from the TSC,
- * the logical processor also adds (or subtracts) value X from the
- * IA32_TSC_ADJUST MSR.
- *
- * Note that when L1 doesn't intercept writes to IA32_TSC, a
- * WRMSR(IA32_TSC) from L2 sets L1's TSC value, not L2's perceived TSC
- * value.
- *
- * This test verifies that this unusual case is handled correctly.
- */
-
-#include "test_util.h"
-#include "kvm_util.h"
-#include "processor.h"
-#include "vmx.h"
-
-#include <string.h>
-#include <sys/ioctl.h>
-
-#include "kselftest.h"
-
-#ifndef MSR_IA32_TSC_ADJUST
-#define MSR_IA32_TSC_ADJUST 0x3b
-#endif
-
-#define TSC_ADJUST_VALUE (1ll << 32)
-#define TSC_OFFSET_VALUE -(1ll << 48)
-
-enum {
-	PORT_ABORT = 0x1000,
-	PORT_REPORT,
-	PORT_DONE,
-};
-
-enum {
-	VMXON_PAGE = 0,
-	VMCS_PAGE,
-	MSR_BITMAP_PAGE,
-
-	NUM_VMX_PAGES,
-};
-
-/* The virtual machine object. */
-static struct kvm_vm *vm;
-
-static void check_ia32_tsc_adjust(int64_t max)
-{
-	int64_t adjust;
-
-	adjust = rdmsr(MSR_IA32_TSC_ADJUST);
-	GUEST_SYNC(adjust);
-	GUEST_ASSERT(adjust <= max);
-}
-
-static void l2_guest_code(void)
-{
-	uint64_t l1_tsc = rdtsc() - TSC_OFFSET_VALUE;
-
-	wrmsr(MSR_IA32_TSC, l1_tsc - TSC_ADJUST_VALUE);
-	check_ia32_tsc_adjust(-2 * TSC_ADJUST_VALUE);
-
-	/* Exit to L1 */
-	__asm__ __volatile__("vmcall");
-}
-
-static void l1_guest_code(struct vmx_pages *vmx_pages)
-{
-#define L2_GUEST_STACK_SIZE 64
-	unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
-	uint32_t control;
-
-	GUEST_ASSERT(rdtsc() < TSC_ADJUST_VALUE);
-	wrmsr(MSR_IA32_TSC, rdtsc() - TSC_ADJUST_VALUE);
-	check_ia32_tsc_adjust(-1 * TSC_ADJUST_VALUE);
-
-	GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
-	GUEST_ASSERT(load_vmcs(vmx_pages));
-
-	/* Prepare the VMCS for L2 execution. */
-	prepare_vmcs(vmx_pages, l2_guest_code,
-		     &l2_guest_stack[L2_GUEST_STACK_SIZE]);
-	control = vmreadz(CPU_BASED_VM_EXEC_CONTROL);
-	control |= CPU_BASED_USE_MSR_BITMAPS | CPU_BASED_USE_TSC_OFFSETTING;
-	vmwrite(CPU_BASED_VM_EXEC_CONTROL, control);
-	vmwrite(TSC_OFFSET, TSC_OFFSET_VALUE);
-
-	GUEST_ASSERT(!vmlaunch());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL);
-
-	check_ia32_tsc_adjust(-2 * TSC_ADJUST_VALUE);
-
-	GUEST_DONE();
-}
-
-static void report(int64_t val)
-{
-	pr_info("IA32_TSC_ADJUST is %ld (%lld * TSC_ADJUST_VALUE + %lld).\n",
-		val, val / TSC_ADJUST_VALUE, val % TSC_ADJUST_VALUE);
-}
-
-int main(int argc, char *argv[])
-{
-	vm_vaddr_t vmx_pages_gva;
-	struct kvm_vcpu *vcpu;
-
-	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
-
-	vm = vm_create_with_one_vcpu(&vcpu, (void *) l1_guest_code);
-
-	/* Allocate VMX pages and shared descriptors (vmx_pages). */
-	vcpu_alloc_vmx(vm, &vmx_pages_gva);
-	vcpu_args_set(vcpu, 1, vmx_pages_gva);
-
-	for (;;) {
-		struct ucall uc;
-
-		vcpu_run(vcpu);
-		TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
-
-		switch (get_ucall(vcpu, &uc)) {
-		case UCALL_ABORT:
-			REPORT_GUEST_ASSERT(uc);
-			/* NOT REACHED */
-		case UCALL_SYNC:
-			report(uc.args[1]);
-			break;
-		case UCALL_DONE:
-			goto done;
-		default:
-			TEST_FAIL("Unknown ucall %lu", uc.cmd);
-		}
-	}
-
-done:
-	kvm_vm_free(vm);
-	return 0;
-}