linux-kernel - [RFC PATCH v2 11/11] selftests: KVM: aarch64: Add the bitmap firmware registers to get-reg-list

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Message-Id: <20211113012234.1443009-12-rananta@google.com>
Date:   Sat, 13 Nov 2021 01:22:34 +0000
From:   Raghavendra Rao Ananta <rananta@...gle.com>
To:     Marc Zyngier <maz@...nel.org>, Andrew Jones <drjones@...hat.com>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Peter Shier <pshier@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Reiji Watanabe <reijiw@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Raghavendra Rao Anata <rananta@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [RFC PATCH v2 11/11] selftests: KVM: aarch64: Add the bitmap firmware
 registers to get-reg-list

The bitmap firmware psuedo-registers needs special handling, such as
enabling the capability KVM_CAP_ARM_HVC_FW_REG_BMAP. Since there's
no support as of yet in get-reg-list to enable a capability, add a
field 'enable_capability' in the 'struct reg_sublist' to
incorporate this. Also, to not mess with the existing configurations,
create a new vcpu_config to hold these bitmap firmware registers.

Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>
---
 .../selftests/kvm/aarch64/get-reg-list.c      | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/tools/testing/selftests/kvm/aarch64/get-reg-list.c b/tools/testing/selftests/kvm/aarch64/get-reg-list.c
index cc898181faab..7479d0ae501e 100644
--- a/tools/testing/selftests/kvm/aarch64/get-reg-list.c
+++ b/tools/testing/selftests/kvm/aarch64/get-reg-list.c
@@ -40,6 +40,7 @@ static __u64 *blessed_reg, blessed_n;
 struct reg_sublist {
 	const char *name;
 	long capability;
+	long enable_capability;
 	int feature;
 	bool finalize;
 	__u64 *regs;
@@ -397,6 +398,19 @@ static void check_supported(struct vcpu_config *c)
 	}
 }
 
+static void enable_capabilities(struct kvm_vm *vm, struct vcpu_config *c)
+{
+	struct reg_sublist *s;
+
+	for_each_sublist(c, s) {
+		if (s->enable_capability) {
+			struct kvm_enable_cap cap = {.cap = s->enable_capability};
+
+			vm_enable_cap(vm, &cap);
+		}
+	}
+}
+
 static bool print_list;
 static bool print_filtered;
 static bool fixup_core_regs;
@@ -414,6 +428,7 @@ static void run_test(struct vcpu_config *c)
 	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
 	prepare_vcpu_init(c, &init);
 	aarch64_vcpu_add_default(vm, 0, &init, NULL);
+	enable_capabilities(vm, c);
 	finalize_vcpu(vm, 0, c);
 
 	reg_list = vcpu_get_reg_list(vm, 0);
@@ -1014,6 +1029,12 @@ static __u64 sve_rejects_set[] = {
 	KVM_REG_ARM64_SVE_VLS,
 };
 
+static __u64 fw_reg_bmap_set[] = {
+	KVM_REG_ARM_FW_REG(3),		/* KVM_REG_ARM_STD_BMAP */
+	KVM_REG_ARM_FW_REG(4),		/* KVM_REG_ARM_STD_HYP_BMAP */
+	KVM_REG_ARM_FW_REG(5),		/* KVM_REG_ARM_VENDOR_HYP_BMAP */
+};
+
 #define BASE_SUBLIST \
 	{ "base", .regs = base_regs, .regs_n = ARRAY_SIZE(base_regs), }
 #define VREGS_SUBLIST \
@@ -1025,6 +1046,10 @@ static __u64 sve_rejects_set[] = {
 	{ "sve", .capability = KVM_CAP_ARM_SVE, .feature = KVM_ARM_VCPU_SVE, .finalize = true, \
 	  .regs = sve_regs, .regs_n = ARRAY_SIZE(sve_regs), \
 	  .rejects_set = sve_rejects_set, .rejects_set_n = ARRAY_SIZE(sve_rejects_set), }
+#define FW_REG_BMAP_SUBLIST \
+	{ "fw_reg_bmap", .regs = fw_reg_bmap_set, .regs_n = ARRAY_SIZE(fw_reg_bmap_set), \
+	 .capability = KVM_CAP_ARM_HVC_FW_REG_BMAP, \
+	 .enable_capability = KVM_CAP_ARM_HVC_FW_REG_BMAP, }
 
 static struct vcpu_config vregs_config = {
 	.sublists = {
@@ -1057,10 +1082,20 @@ static struct vcpu_config sve_pmu_config = {
 	},
 };
 
+static struct vcpu_config vregs_fw_regs_bmap_config = {
+	.sublists = {
+	BASE_SUBLIST,
+	VREGS_SUBLIST,
+	FW_REG_BMAP_SUBLIST,
+	{0},
+	},
+};
+
 static struct vcpu_config *vcpu_configs[] = {
 	&vregs_config,
 	&vregs_pmu_config,
 	&sve_config,
 	&sve_pmu_config,
+	&vregs_fw_regs_bmap_config,
 };
 static int vcpu_configs_n = ARRAY_SIZE(vcpu_configs);
-- 
2.34.0.rc1.387.gb447b232ab-goog