linux-kernel - [PATCH v4 09/12] KVM: selftests: Only do get/set tests on present blessed list

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Date:   Fri, 23 Jun 2023 18:40:11 +0800
From:   Haibo Xu <haibo1.xu@...el.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     xiaobo55x@...il.com, haibo1.xu@...el.com, ajones@...tanamicro.com,
        maz@...nel.org, oliver.upton@...ux.dev, seanjc@...gle.com,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Shuah Khan <shuah@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Ben Gardon <bgardon@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Vipin Sharma <vipinsh@...gle.com>,
        Colton Lewis <coltonlewis@...gle.com>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-kselftest@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev
Subject: [PATCH v4 09/12] KVM: selftests: Only do get/set tests on present blessed list

Only do the get/set tests on present and blessed registers
since we don't know the capabilities of any new ones.

Suggested-by: Andrew Jones <ajones@...tanamicro.com>
Signed-off-by: Haibo Xu <haibo1.xu@...el.com>
---
 tools/testing/selftests/kvm/get-reg-list.c | 29 ++++++++++++++--------
 1 file changed, 18 insertions(+), 11 deletions(-)

diff --git a/tools/testing/selftests/kvm/get-reg-list.c b/tools/testing/selftests/kvm/get-reg-list.c
index b956ee410996..3beb6b62de0a 100644
--- a/tools/testing/selftests/kvm/get-reg-list.c
+++ b/tools/testing/selftests/kvm/get-reg-list.c
@@ -52,6 +52,10 @@ extern int vcpu_configs_n;
 	for_each_reg_filtered(i)						\
 		if (!find_reg(blessed_reg, blessed_n, reg_list->reg[i]))
 
+#define for_each_present_blessed_reg(i)			\
+	for ((i) = 0; (i) < blessed_n; ++(i))		\
+		if (find_reg(reg_list->reg, reg_list->n, blessed_reg[i]))
+
 static const char *config_name(struct vcpu_reg_list *c)
 {
 	struct vcpu_reg_sublist *s;
@@ -189,6 +193,16 @@ static void run_test(struct vcpu_reg_list *c)
 		return;
 	}
 
+	for_each_sublist(c, s)
+		blessed_n += s->regs_n;
+	blessed_reg = calloc(blessed_n, sizeof(__u64));
+
+	n = 0;
+	for_each_sublist(c, s) {
+		for (i = 0; i < s->regs_n; ++i)
+			blessed_reg[n++] = s->regs[i];
+	}
+
 	/*
 	 * We only test that we can get the register and then write back the
 	 * same value. Some registers may allow other values to be written
@@ -198,8 +212,11 @@ static void run_test(struct vcpu_reg_list *c)
 	 * be written need to have the other values tested, then we should
 	 * create a new set of tests for those in a new independent test
 	 * executable.
+	 *
+	 * Only do the get/set tests on present, blessed list registers,
+	 * since we don't know the capabilities of any new registers.
 	 */
-	for_each_reg(i) {
+	for_each_present_blessed_reg(i) {
 		uint8_t addr[2048 / 8];
 		struct kvm_one_reg reg = {
 			.id = reg_list->reg[i],
@@ -242,16 +259,6 @@ static void run_test(struct vcpu_reg_list *c)
 		}
 	}
 
-	for_each_sublist(c, s)
-		blessed_n += s->regs_n;
-	blessed_reg = calloc(blessed_n, sizeof(__u64));
-
-	n = 0;
-	for_each_sublist(c, s) {
-		for (i = 0; i < s->regs_n; ++i)
-			blessed_reg[n++] = s->regs[i];
-	}
-
 	for_each_new_reg(i)
 		++new_regs;
 
-- 
2.34.1