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From: Yosry Ahmed <yosry.ahmed@linux.dev>
To: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Kevin Cheng <chengkev@google.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Yosry Ahmed <yosry.ahmed@linux.dev>
Subject: [PATCH v3 04/14] x86/svm: Move CR0 selective write intercept test near CR3 intercept
Date: Mon, 10 Nov 2025 23:26:32 +0000	[thread overview]
Message-ID: <20251110232642.633672-5-yosry.ahmed@linux.dev> (raw)
In-Reply-To: <20251110232642.633672-1-yosry.ahmed@linux.dev>

It makes more semantic sense for these tests to be in close proximity.

Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev>
---
 x86/svm_tests.c | 64 ++++++++++++++++++++++++-------------------------
 1 file changed, 32 insertions(+), 32 deletions(-)

diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index e911659194b3d..feeb27d61435b 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -112,6 +112,35 @@ static bool finished_rsm_intercept(struct svm_test *test)
 	return get_test_stage(test) == 2;
 }
 
+static void prepare_sel_cr0_intercept(struct svm_test *test)
+{
+	vmcb->save.cr0 &= ~X86_CR0_CD;
+	vmcb->control.intercept |= (1ULL << INTERCEPT_SELECTIVE_CR0);
+}
+
+static void test_sel_cr0_write_intercept(struct svm_test *test)
+{
+	unsigned long cr0;
+
+	/* read cr0, set CD, and write back */
+	cr0  = read_cr0();
+	cr0 |= X86_CR0_CD;
+	write_cr0(cr0);
+
+	/*
+	 * If we are here the test failed, not sure what to do now because we
+	 * are not in guest-mode anymore so we can't trigger an intercept.
+	 * Trigger a tripple-fault for now.
+	 */
+	report_fail("sel_cr0 test. Can not recover from this - exiting");
+	exit(report_summary());
+}
+
+static bool check_sel_cr0_intercept(struct svm_test *test)
+{
+	return vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE;
+}
+
 static void prepare_cr3_intercept(struct svm_test *test)
 {
 	default_prepare(test);
@@ -793,35 +822,6 @@ static bool check_asid_zero(struct svm_test *test)
 	return vmcb->control.exit_code == SVM_EXIT_ERR;
 }
 
-static void prepare_sel_cr0_intercept(struct svm_test *test)
-{
-	vmcb->save.cr0 &= ~X86_CR0_CD;
-	vmcb->control.intercept |= (1ULL << INTERCEPT_SELECTIVE_CR0);
-}
-
-static void test_sel_cr0_write_intercept(struct svm_test *test)
-{
-	unsigned long cr0;
-
-	/* read cr0, set CD, and write back */
-	cr0  = read_cr0();
-	cr0 |= X86_CR0_CD;
-	write_cr0(cr0);
-
-	/*
-	 * If we are here the test failed, not sure what to do now because we
-	 * are not in guest-mode anymore so we can't trigger an intercept.
-	 * Trigger a tripple-fault for now.
-	 */
-	report_fail("sel_cr0 test. Can not recover from this - exiting");
-	exit(report_summary());
-}
-
-static bool check_sel_cr0_intercept(struct svm_test *test)
-{
-	return vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE;
-}
-
 #define TSC_ADJUST_VALUE    (1ll << 32)
 #define TSC_OFFSET_VALUE    (~0ull << 48)
 static bool ok;
@@ -3458,6 +3458,9 @@ struct svm_test svm_tests[] = {
 	{ "rsm", default_supported,
 	  prepare_rsm_intercept, default_prepare_gif_clear,
 	  test_rsm_intercept, finished_rsm_intercept, check_rsm_intercept },
+	{ "sel cr0 write intercept", default_supported,
+	  prepare_sel_cr0_intercept, default_prepare_gif_clear,
+	  test_sel_cr0_write_intercept, default_finished, check_sel_cr0_intercept},
 	{ "cr3 read intercept", default_supported,
 	  prepare_cr3_intercept, default_prepare_gif_clear,
 	  test_cr3_intercept, default_finished, check_cr3_intercept },
@@ -3482,9 +3485,6 @@ struct svm_test svm_tests[] = {
 	{ "asid_zero", default_supported, prepare_asid_zero,
 	  default_prepare_gif_clear, test_asid_zero,
 	  default_finished, check_asid_zero },
-	{ "sel cr0 write intercept", default_supported,
-	  prepare_sel_cr0_intercept, default_prepare_gif_clear,
-	  test_sel_cr0_write_intercept, default_finished, check_sel_cr0_intercept},
 	{ "tsc_adjust", tsc_adjust_supported, tsc_adjust_prepare,
 	  default_prepare_gif_clear, tsc_adjust_test,
 	  default_finished, tsc_adjust_check },
-- 
2.51.2.1041.gc1ab5b90ca-goog


  parent reply	other threads:[~2025-11-10 23:27 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-10 23:26 [PATCH v3 00/14] Improvements for (nested) SVM testing Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 01/14] scripts: Always return '2' when skipping tests Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 02/14] x86/vmx: Skip vmx_pf_exception_test_fep early if FEP is not available Yosry Ahmed
2025-11-14  0:40   ` Sean Christopherson
2025-11-14  0:47     ` Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 03/14] x86/svm: Cleanup selective cr0 write intercept test Yosry Ahmed
2025-11-12 13:48   ` Manali Shukla
2025-11-10 23:26 ` Yosry Ahmed [this message]
2025-11-12 13:52   ` [PATCH v3 04/14] x86/svm: Move CR0 selective write intercept test near CR3 intercept Manali Shukla
2025-11-10 23:26 ` [PATCH v3 05/14] x86/svm: Add FEP helpers for SVM tests Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 06/14] x86/svm: Report unsupported " Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 07/14] x86/svm: Move report_svm_guest() to the top of svm_tests.c Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 08/14] x86/svm: Print SVM test names before running tests Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 09/14] x86/svm: Deflake svm_tsc_scale_test Yosry Ahmed
2025-11-14  0:34   ` Sean Christopherson
2025-11-14  5:46     ` Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 10/14] x86/svm: Generalize and improve selective CR0 write intercept test Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 11/14] x86/svm: Add more selective CR0 write and LMSW test cases Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 12/14] x86/svm: Cleanup LBRV tests Yosry Ahmed
2025-11-13 11:58   ` Shivansh Dhiman
2025-11-13 14:59     ` Yosry Ahmed
2025-11-14  4:57       ` Shivansh Dhiman
2025-11-14  5:40         ` Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 13/14] x86/svm: Add more LBRV test cases Yosry Ahmed
2025-11-10 23:26 ` [PATCH v3 14/14] x86/svm: Rename VMCB fields to match KVM Yosry Ahmed
2025-11-14  0:40   ` Sean Christopherson
2025-11-11  0:52 ` [PATCH v3 00/14] Improvements for (nested) SVM testing Sean Christopherson
2025-11-11  0:58   ` Yosry Ahmed
2025-11-14  0:46 ` Sean Christopherson
2025-11-14  5:42   ` Yosry Ahmed

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