linux-kernel - [PATCH v4 27/27] KVM: arm64: selftests: Add SME to set_id

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Message-Id: <20250214-kvm-arm64-sme-v4-27-d64a681adcc2@kernel.org>
Date: Fri, 14 Feb 2025 01:58:10 +0000
From: Mark Brown <broonie@...nel.org>
To: Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>, 
 Joey Gouly <joey.gouly@....com>, Catalin Marinas <catalin.marinas@....com>, 
 Suzuki K Poulose <suzuki.poulose@....com>, Will Deacon <will@...nel.org>, 
 Paolo Bonzini <pbonzini@...hat.com>, Jonathan Corbet <corbet@....net>, 
 Shuah Khan <shuah@...nel.org>
Cc: Dave Martin <Dave.Martin@....com>, Fuad Tabba <tabba@...gle.com>, 
 Mark Rutland <mark.rutland@....com>, linux-arm-kernel@...ts.infradead.org, 
 kvmarm@...ts.linux.dev, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, 
 linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Mark Brown <broonie@...nel.org>
Subject: [PATCH v4 27/27] KVM: arm64: selftests: Add SME to set_id_regs
 test

Add coverage of the SME ID registers to set_id_regs, ID_AA64PFR1_EL1.SME
becomes writable and we add ID_AA64SMFR_EL1 and it's subfields.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 tools/testing/selftests/kvm/arm64/set_id_regs.c | 29 +++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/arm64/set_id_regs.c b/tools/testing/selftests/kvm/arm64/set_id_regs.c
index 217541fe653601a82697134c8d773e901a205cfe..16a4cd84f45472451479c6a5502c67adb4d64490 100644
--- a/tools/testing/selftests/kvm/arm64/set_id_regs.c
+++ b/tools/testing/selftests/kvm/arm64/set_id_regs.c
@@ -138,6 +138,7 @@ static const struct reg_ftr_bits ftr_id_aa64pfr0_el1[] = {
 
 static const struct reg_ftr_bits ftr_id_aa64pfr1_el1[] = {
 	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64PFR1_EL1, CSV2_frac, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64PFR1_EL1, SME, 0),
 	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64PFR1_EL1, SSBS, ID_AA64PFR1_EL1_SSBS_NI),
 	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64PFR1_EL1, BT, 0),
 	REG_FTR_END,
@@ -182,6 +183,28 @@ static const struct reg_ftr_bits ftr_id_aa64mmfr2_el1[] = {
 	REG_FTR_END,
 };
 
+static const struct reg_ftr_bits ftr_id_aa64smfr0_el1[] = {
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, FA64, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, LUTv2, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, SMEver, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, I16I64, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, F64F64, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, I16I32, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, B16B16, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, F16F16, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, F8F16, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, F8F32, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, I8I32, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, F16F32, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, B16F32, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, BI32I32, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, F32F32, 0)
+,	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, SF8FMA, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, SF8DP4, 0),
+	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64SMFR0_EL1, SF8DP2, 0),
+	REG_FTR_END,
+};
+
 static const struct reg_ftr_bits ftr_id_aa64zfr0_el1[] = {
 	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ZFR0_EL1, F64MM, 0),
 	REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64ZFR0_EL1, F32MM, 0),
@@ -212,6 +235,7 @@ static struct test_feature_reg test_regs[] = {
 	TEST_REG(SYS_ID_AA64MMFR0_EL1, ftr_id_aa64mmfr0_el1),
 	TEST_REG(SYS_ID_AA64MMFR1_EL1, ftr_id_aa64mmfr1_el1),
 	TEST_REG(SYS_ID_AA64MMFR2_EL1, ftr_id_aa64mmfr2_el1),
+	TEST_REG(SYS_ID_AA64SMFR0_EL1, ftr_id_aa64smfr0_el1),
 	TEST_REG(SYS_ID_AA64ZFR0_EL1, ftr_id_aa64zfr0_el1),
 };
 
@@ -228,6 +252,7 @@ static void guest_code(void)
 	GUEST_REG_SYNC(SYS_ID_AA64MMFR0_EL1);
 	GUEST_REG_SYNC(SYS_ID_AA64MMFR1_EL1);
 	GUEST_REG_SYNC(SYS_ID_AA64MMFR2_EL1);
+	GUEST_REG_SYNC(SYS_ID_AA64SMFR0_EL1);
 	GUEST_REG_SYNC(SYS_ID_AA64ZFR0_EL1);
 	GUEST_REG_SYNC(SYS_CTR_EL0);
 
@@ -675,8 +700,8 @@ int main(void)
 		   ARRAY_SIZE(ftr_id_aa64isar2_el1) + ARRAY_SIZE(ftr_id_aa64pfr0_el1) +
 		   ARRAY_SIZE(ftr_id_aa64pfr1_el1) + ARRAY_SIZE(ftr_id_aa64mmfr0_el1) +
 		   ARRAY_SIZE(ftr_id_aa64mmfr1_el1) + ARRAY_SIZE(ftr_id_aa64mmfr2_el1) +
-		   ARRAY_SIZE(ftr_id_aa64zfr0_el1) - ARRAY_SIZE(test_regs) + 2 +
-		   MPAM_IDREG_TEST;
+		   ARRAY_SIZE(ftr_id_aa64zfr0_el1) + ARRAY_SIZE(ftr_id_aa64smfr0_el1) - ARRAY_SIZE(test_regs) +
+		   2 + MPAM_IDREG_TEST;
 
 	ksft_set_plan(test_cnt);
 

-- 
2.39.5