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From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	David Brazdil <dbrazdil@google.com>,
	Eric Auger <eric.auger@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Qian Cai <qcai@redhat.com>,
	Shannon Zhao <shannon.zhao@linux.alibaba.com>,
	James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	kernel-team@android.com, kvmarm@lists.cs.columbia.edu,
	kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 08/18] KVM: arm64: Declutter host PSCI 0.1 handling
Date: Thu,  7 Jan 2021 11:20:51 +0000	[thread overview]
Message-ID: <20210107112101.2297944-9-maz@kernel.org> (raw)
In-Reply-To: <20210107112101.2297944-1-maz@kernel.org>

Although there is nothing wrong with the current host PSCI relay
implementation, we can clean it up and remove some of the helpers
that do not improve the overall readability of the legacy PSCI 0.1
handling.

Opportunity is taken to turn the bitmap into a set of booleans,
and creative use of preprocessor macros make init and check
more concise/readable.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/include/asm/kvm_host.h    | 11 ++--
 arch/arm64/kvm/arm.c                 | 12 +++--
 arch/arm64/kvm/hyp/nvhe/psci-relay.c | 77 +++++++---------------------
 3 files changed, 30 insertions(+), 70 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index bce2452b305c..8fcfab0c2567 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -241,11 +241,6 @@ struct kvm_host_data {
 	struct kvm_pmu_events pmu_events;
 };
 
-#define KVM_HOST_PSCI_0_1_CPU_SUSPEND	BIT(0)
-#define KVM_HOST_PSCI_0_1_CPU_ON	BIT(1)
-#define KVM_HOST_PSCI_0_1_CPU_OFF	BIT(2)
-#define KVM_HOST_PSCI_0_1_MIGRATE	BIT(3)
-
 struct kvm_host_psci_config {
 	/* PSCI version used by host. */
 	u32 version;
@@ -253,8 +248,10 @@ struct kvm_host_psci_config {
 	/* Function IDs used by host if version is v0.1. */
 	struct psci_0_1_function_ids function_ids_0_1;
 
-	/* Bitmask of functions enabled for v0.1, bits KVM_HOST_PSCI_0_1_*. */
-	unsigned int enabled_functions_0_1;
+	bool psci_0_1_cpu_suspend_implemented;
+	bool psci_0_1_cpu_on_implemented;
+	bool psci_0_1_cpu_off_implemented;
+	bool psci_0_1_migrate_implemented;
 };
 
 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config);
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 836ca763b91d..e207e4541f55 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1603,6 +1603,9 @@ static void init_cpu_logical_map(void)
 		hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu);
 }
 
+#define init_psci_0_1_impl_state(config, what)	\
+	config.psci_0_1_ ## what ## _implemented = psci_ops.what
+
 static bool init_psci_relay(void)
 {
 	/*
@@ -1618,11 +1621,10 @@ static bool init_psci_relay(void)
 
 	if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) {
 		kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids();
-		kvm_host_psci_config.enabled_functions_0_1 =
-			(psci_ops.cpu_suspend ? KVM_HOST_PSCI_0_1_CPU_SUSPEND : 0) |
-			(psci_ops.cpu_off ? KVM_HOST_PSCI_0_1_CPU_OFF : 0) |
-			(psci_ops.cpu_on ? KVM_HOST_PSCI_0_1_CPU_ON : 0) |
-			(psci_ops.migrate ? KVM_HOST_PSCI_0_1_MIGRATE : 0);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off);
+		init_psci_0_1_impl_state(kvm_host_psci_config, migrate);
 	}
 	return true;
 }
diff --git a/arch/arm64/kvm/hyp/nvhe/psci-relay.c b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
index 1f7237e45148..e3947846ffcb 100644
--- a/arch/arm64/kvm/hyp/nvhe/psci-relay.c
+++ b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
@@ -43,48 +43,16 @@ struct psci_boot_args {
 static DEFINE_PER_CPU(struct psci_boot_args, cpu_on_args) = PSCI_BOOT_ARGS_INIT;
 static DEFINE_PER_CPU(struct psci_boot_args, suspend_args) = PSCI_BOOT_ARGS_INIT;
 
-static u64 get_psci_func_id(struct kvm_cpu_context *host_ctxt)
-{
-	DECLARE_REG(u64, func_id, host_ctxt, 0);
-
-	return func_id;
-}
-
-static inline bool is_psci_0_1_function_enabled(unsigned int fn_bit)
-{
-	return kvm_host_psci_config.enabled_functions_0_1 & fn_bit;
-}
-
-static inline bool is_psci_0_1_cpu_suspend(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_SUSPEND) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_suspend);
-}
-
-static inline bool is_psci_0_1_cpu_on(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_ON) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_on);
-}
-
-static inline bool is_psci_0_1_cpu_off(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_OFF) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_off);
-}
-
-static inline bool is_psci_0_1_migrate(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_MIGRATE) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.migrate);
-}
+#define	is_psci_0_1(what, func_id)					\
+	(kvm_host_psci_config.psci_0_1_ ## what ## _implemented &&	\
+	 (func_id) == kvm_host_psci_config.function_ids_0_1.what)
 
 static bool is_psci_0_1_call(u64 func_id)
 {
-	return is_psci_0_1_cpu_suspend(func_id) ||
-	       is_psci_0_1_cpu_on(func_id) ||
-	       is_psci_0_1_cpu_off(func_id) ||
-	       is_psci_0_1_migrate(func_id);
+	return (is_psci_0_1(cpu_suspend, func_id) ||
+		is_psci_0_1(cpu_on, func_id) ||
+		is_psci_0_1(cpu_off, func_id) ||
+		is_psci_0_1(migrate, func_id));
 }
 
 static bool is_psci_0_2_call(u64 func_id)
@@ -94,16 +62,6 @@ static bool is_psci_0_2_call(u64 func_id)
 	       (PSCI_0_2_FN64(0) <= func_id && func_id <= PSCI_0_2_FN64(31));
 }
 
-static bool is_psci_call(u64 func_id)
-{
-	switch (kvm_host_psci_config.version) {
-	case PSCI_VERSION(0, 1):
-		return is_psci_0_1_call(func_id);
-	default:
-		return is_psci_0_2_call(func_id);
-	}
-}
-
 static unsigned long psci_call(unsigned long fn, unsigned long arg0,
 			       unsigned long arg1, unsigned long arg2)
 {
@@ -273,14 +231,14 @@ asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
 
 static unsigned long psci_0_1_handler(u64 func_id, struct kvm_cpu_context *host_ctxt)
 {
-	if (is_psci_0_1_cpu_off(func_id) || is_psci_0_1_migrate(func_id))
+	if (is_psci_0_1(cpu_off, func_id) || is_psci_0_1(migrate, func_id))
 		return psci_forward(host_ctxt);
-	else if (is_psci_0_1_cpu_on(func_id))
+	if (is_psci_0_1(cpu_on, func_id))
 		return psci_cpu_on(func_id, host_ctxt);
-	else if (is_psci_0_1_cpu_suspend(func_id))
+	if (is_psci_0_1(cpu_suspend, func_id))
 		return psci_cpu_suspend(func_id, host_ctxt);
-	else
-		return PSCI_RET_NOT_SUPPORTED;
+
+	return PSCI_RET_NOT_SUPPORTED;
 }
 
 static unsigned long psci_0_2_handler(u64 func_id, struct kvm_cpu_context *host_ctxt)
@@ -322,20 +280,23 @@ static unsigned long psci_1_0_handler(u64 func_id, struct kvm_cpu_context *host_
 
 bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt)
 {
-	u64 func_id = get_psci_func_id(host_ctxt);
+	DECLARE_REG(u64, func_id, host_ctxt, 0);
 	unsigned long ret;
 
-	if (!is_psci_call(func_id))
-		return false;
-
 	switch (kvm_host_psci_config.version) {
 	case PSCI_VERSION(0, 1):
+		if (!is_psci_0_1_call(func_id))
+			return false;
 		ret = psci_0_1_handler(func_id, host_ctxt);
 		break;
 	case PSCI_VERSION(0, 2):
+		if (!is_psci_0_2_call(func_id))
+			return false;
 		ret = psci_0_2_handler(func_id, host_ctxt);
 		break;
 	default:
+		if (!is_psci_0_2_call(func_id))
+			return false;
 		ret = psci_1_0_handler(func_id, host_ctxt);
 		break;
 	}
-- 
2.29.2


WARNING: multiple messages have this Message-ID
From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kernel-team@android.com, kvm@vger.kernel.org,
	Qian Cai <qcai@redhat.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Shannon Zhao <shannon.zhao@linux.alibaba.com>,
	linux-arm-kernel@lists.infradead.org,
	Nathan Chancellor <natechancellor@gmail.com>,
	kvmarm@lists.cs.columbia.edu
Subject: [PATCH 08/18] KVM: arm64: Declutter host PSCI 0.1 handling
Date: Thu,  7 Jan 2021 11:20:51 +0000	[thread overview]
Message-ID: <20210107112101.2297944-9-maz@kernel.org> (raw)
In-Reply-To: <20210107112101.2297944-1-maz@kernel.org>

Although there is nothing wrong with the current host PSCI relay
implementation, we can clean it up and remove some of the helpers
that do not improve the overall readability of the legacy PSCI 0.1
handling.

Opportunity is taken to turn the bitmap into a set of booleans,
and creative use of preprocessor macros make init and check
more concise/readable.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/include/asm/kvm_host.h    | 11 ++--
 arch/arm64/kvm/arm.c                 | 12 +++--
 arch/arm64/kvm/hyp/nvhe/psci-relay.c | 77 +++++++---------------------
 3 files changed, 30 insertions(+), 70 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index bce2452b305c..8fcfab0c2567 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -241,11 +241,6 @@ struct kvm_host_data {
 	struct kvm_pmu_events pmu_events;
 };
 
-#define KVM_HOST_PSCI_0_1_CPU_SUSPEND	BIT(0)
-#define KVM_HOST_PSCI_0_1_CPU_ON	BIT(1)
-#define KVM_HOST_PSCI_0_1_CPU_OFF	BIT(2)
-#define KVM_HOST_PSCI_0_1_MIGRATE	BIT(3)
-
 struct kvm_host_psci_config {
 	/* PSCI version used by host. */
 	u32 version;
@@ -253,8 +248,10 @@ struct kvm_host_psci_config {
 	/* Function IDs used by host if version is v0.1. */
 	struct psci_0_1_function_ids function_ids_0_1;
 
-	/* Bitmask of functions enabled for v0.1, bits KVM_HOST_PSCI_0_1_*. */
-	unsigned int enabled_functions_0_1;
+	bool psci_0_1_cpu_suspend_implemented;
+	bool psci_0_1_cpu_on_implemented;
+	bool psci_0_1_cpu_off_implemented;
+	bool psci_0_1_migrate_implemented;
 };
 
 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config);
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 836ca763b91d..e207e4541f55 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1603,6 +1603,9 @@ static void init_cpu_logical_map(void)
 		hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu);
 }
 
+#define init_psci_0_1_impl_state(config, what)	\
+	config.psci_0_1_ ## what ## _implemented = psci_ops.what
+
 static bool init_psci_relay(void)
 {
 	/*
@@ -1618,11 +1621,10 @@ static bool init_psci_relay(void)
 
 	if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) {
 		kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids();
-		kvm_host_psci_config.enabled_functions_0_1 =
-			(psci_ops.cpu_suspend ? KVM_HOST_PSCI_0_1_CPU_SUSPEND : 0) |
-			(psci_ops.cpu_off ? KVM_HOST_PSCI_0_1_CPU_OFF : 0) |
-			(psci_ops.cpu_on ? KVM_HOST_PSCI_0_1_CPU_ON : 0) |
-			(psci_ops.migrate ? KVM_HOST_PSCI_0_1_MIGRATE : 0);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off);
+		init_psci_0_1_impl_state(kvm_host_psci_config, migrate);
 	}
 	return true;
 }
diff --git a/arch/arm64/kvm/hyp/nvhe/psci-relay.c b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
index 1f7237e45148..e3947846ffcb 100644
--- a/arch/arm64/kvm/hyp/nvhe/psci-relay.c
+++ b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
@@ -43,48 +43,16 @@ struct psci_boot_args {
 static DEFINE_PER_CPU(struct psci_boot_args, cpu_on_args) = PSCI_BOOT_ARGS_INIT;
 static DEFINE_PER_CPU(struct psci_boot_args, suspend_args) = PSCI_BOOT_ARGS_INIT;
 
-static u64 get_psci_func_id(struct kvm_cpu_context *host_ctxt)
-{
-	DECLARE_REG(u64, func_id, host_ctxt, 0);
-
-	return func_id;
-}
-
-static inline bool is_psci_0_1_function_enabled(unsigned int fn_bit)
-{
-	return kvm_host_psci_config.enabled_functions_0_1 & fn_bit;
-}
-
-static inline bool is_psci_0_1_cpu_suspend(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_SUSPEND) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_suspend);
-}
-
-static inline bool is_psci_0_1_cpu_on(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_ON) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_on);
-}
-
-static inline bool is_psci_0_1_cpu_off(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_OFF) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_off);
-}
-
-static inline bool is_psci_0_1_migrate(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_MIGRATE) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.migrate);
-}
+#define	is_psci_0_1(what, func_id)					\
+	(kvm_host_psci_config.psci_0_1_ ## what ## _implemented &&	\
+	 (func_id) == kvm_host_psci_config.function_ids_0_1.what)
 
 static bool is_psci_0_1_call(u64 func_id)
 {
-	return is_psci_0_1_cpu_suspend(func_id) ||
-	       is_psci_0_1_cpu_on(func_id) ||
-	       is_psci_0_1_cpu_off(func_id) ||
-	       is_psci_0_1_migrate(func_id);
+	return (is_psci_0_1(cpu_suspend, func_id) ||
+		is_psci_0_1(cpu_on, func_id) ||
+		is_psci_0_1(cpu_off, func_id) ||
+		is_psci_0_1(migrate, func_id));
 }
 
 static bool is_psci_0_2_call(u64 func_id)
@@ -94,16 +62,6 @@ static bool is_psci_0_2_call(u64 func_id)
 	       (PSCI_0_2_FN64(0) <= func_id && func_id <= PSCI_0_2_FN64(31));
 }
 
-static bool is_psci_call(u64 func_id)
-{
-	switch (kvm_host_psci_config.version) {
-	case PSCI_VERSION(0, 1):
-		return is_psci_0_1_call(func_id);
-	default:
-		return is_psci_0_2_call(func_id);
-	}
-}
-
 static unsigned long psci_call(unsigned long fn, unsigned long arg0,
 			       unsigned long arg1, unsigned long arg2)
 {
@@ -273,14 +231,14 @@ asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
 
 static unsigned long psci_0_1_handler(u64 func_id, struct kvm_cpu_context *host_ctxt)
 {
-	if (is_psci_0_1_cpu_off(func_id) || is_psci_0_1_migrate(func_id))
+	if (is_psci_0_1(cpu_off, func_id) || is_psci_0_1(migrate, func_id))
 		return psci_forward(host_ctxt);
-	else if (is_psci_0_1_cpu_on(func_id))
+	if (is_psci_0_1(cpu_on, func_id))
 		return psci_cpu_on(func_id, host_ctxt);
-	else if (is_psci_0_1_cpu_suspend(func_id))
+	if (is_psci_0_1(cpu_suspend, func_id))
 		return psci_cpu_suspend(func_id, host_ctxt);
-	else
-		return PSCI_RET_NOT_SUPPORTED;
+
+	return PSCI_RET_NOT_SUPPORTED;
 }
 
 static unsigned long psci_0_2_handler(u64 func_id, struct kvm_cpu_context *host_ctxt)
@@ -322,20 +280,23 @@ static unsigned long psci_1_0_handler(u64 func_id, struct kvm_cpu_context *host_
 
 bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt)
 {
-	u64 func_id = get_psci_func_id(host_ctxt);
+	DECLARE_REG(u64, func_id, host_ctxt, 0);
 	unsigned long ret;
 
-	if (!is_psci_call(func_id))
-		return false;
-
 	switch (kvm_host_psci_config.version) {
 	case PSCI_VERSION(0, 1):
+		if (!is_psci_0_1_call(func_id))
+			return false;
 		ret = psci_0_1_handler(func_id, host_ctxt);
 		break;
 	case PSCI_VERSION(0, 2):
+		if (!is_psci_0_2_call(func_id))
+			return false;
 		ret = psci_0_2_handler(func_id, host_ctxt);
 		break;
 	default:
+		if (!is_psci_0_2_call(func_id))
+			return false;
 		ret = psci_1_0_handler(func_id, host_ctxt);
 		break;
 	}
-- 
2.29.2

_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm

WARNING: multiple messages have this Message-ID
From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	kernel-team@android.com, kvm@vger.kernel.org,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Qian Cai <qcai@redhat.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Shannon Zhao <shannon.zhao@linux.alibaba.com>,
	Eric Auger <eric.auger@redhat.com>,
	James Morse <james.morse@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Nathan Chancellor <natechancellor@gmail.com>,
	David Brazdil <dbrazdil@google.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	kvmarm@lists.cs.columbia.edu,
	Julien Thierry <julien.thierry.kdev@gmail.com>
Subject: [PATCH 08/18] KVM: arm64: Declutter host PSCI 0.1 handling
Date: Thu,  7 Jan 2021 11:20:51 +0000	[thread overview]
Message-ID: <20210107112101.2297944-9-maz@kernel.org> (raw)
In-Reply-To: <20210107112101.2297944-1-maz@kernel.org>

Although there is nothing wrong with the current host PSCI relay
implementation, we can clean it up and remove some of the helpers
that do not improve the overall readability of the legacy PSCI 0.1
handling.

Opportunity is taken to turn the bitmap into a set of booleans,
and creative use of preprocessor macros make init and check
more concise/readable.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/include/asm/kvm_host.h    | 11 ++--
 arch/arm64/kvm/arm.c                 | 12 +++--
 arch/arm64/kvm/hyp/nvhe/psci-relay.c | 77 +++++++---------------------
 3 files changed, 30 insertions(+), 70 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index bce2452b305c..8fcfab0c2567 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -241,11 +241,6 @@ struct kvm_host_data {
 	struct kvm_pmu_events pmu_events;
 };
 
-#define KVM_HOST_PSCI_0_1_CPU_SUSPEND	BIT(0)
-#define KVM_HOST_PSCI_0_1_CPU_ON	BIT(1)
-#define KVM_HOST_PSCI_0_1_CPU_OFF	BIT(2)
-#define KVM_HOST_PSCI_0_1_MIGRATE	BIT(3)
-
 struct kvm_host_psci_config {
 	/* PSCI version used by host. */
 	u32 version;
@@ -253,8 +248,10 @@ struct kvm_host_psci_config {
 	/* Function IDs used by host if version is v0.1. */
 	struct psci_0_1_function_ids function_ids_0_1;
 
-	/* Bitmask of functions enabled for v0.1, bits KVM_HOST_PSCI_0_1_*. */
-	unsigned int enabled_functions_0_1;
+	bool psci_0_1_cpu_suspend_implemented;
+	bool psci_0_1_cpu_on_implemented;
+	bool psci_0_1_cpu_off_implemented;
+	bool psci_0_1_migrate_implemented;
 };
 
 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config);
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 836ca763b91d..e207e4541f55 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1603,6 +1603,9 @@ static void init_cpu_logical_map(void)
 		hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu);
 }
 
+#define init_psci_0_1_impl_state(config, what)	\
+	config.psci_0_1_ ## what ## _implemented = psci_ops.what
+
 static bool init_psci_relay(void)
 {
 	/*
@@ -1618,11 +1621,10 @@ static bool init_psci_relay(void)
 
 	if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) {
 		kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids();
-		kvm_host_psci_config.enabled_functions_0_1 =
-			(psci_ops.cpu_suspend ? KVM_HOST_PSCI_0_1_CPU_SUSPEND : 0) |
-			(psci_ops.cpu_off ? KVM_HOST_PSCI_0_1_CPU_OFF : 0) |
-			(psci_ops.cpu_on ? KVM_HOST_PSCI_0_1_CPU_ON : 0) |
-			(psci_ops.migrate ? KVM_HOST_PSCI_0_1_MIGRATE : 0);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on);
+		init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off);
+		init_psci_0_1_impl_state(kvm_host_psci_config, migrate);
 	}
 	return true;
 }
diff --git a/arch/arm64/kvm/hyp/nvhe/psci-relay.c b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
index 1f7237e45148..e3947846ffcb 100644
--- a/arch/arm64/kvm/hyp/nvhe/psci-relay.c
+++ b/arch/arm64/kvm/hyp/nvhe/psci-relay.c
@@ -43,48 +43,16 @@ struct psci_boot_args {
 static DEFINE_PER_CPU(struct psci_boot_args, cpu_on_args) = PSCI_BOOT_ARGS_INIT;
 static DEFINE_PER_CPU(struct psci_boot_args, suspend_args) = PSCI_BOOT_ARGS_INIT;
 
-static u64 get_psci_func_id(struct kvm_cpu_context *host_ctxt)
-{
-	DECLARE_REG(u64, func_id, host_ctxt, 0);
-
-	return func_id;
-}
-
-static inline bool is_psci_0_1_function_enabled(unsigned int fn_bit)
-{
-	return kvm_host_psci_config.enabled_functions_0_1 & fn_bit;
-}
-
-static inline bool is_psci_0_1_cpu_suspend(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_SUSPEND) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_suspend);
-}
-
-static inline bool is_psci_0_1_cpu_on(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_ON) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_on);
-}
-
-static inline bool is_psci_0_1_cpu_off(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_CPU_OFF) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.cpu_off);
-}
-
-static inline bool is_psci_0_1_migrate(u64 func_id)
-{
-	return is_psci_0_1_function_enabled(KVM_HOST_PSCI_0_1_MIGRATE) &&
-	       (func_id == kvm_host_psci_config.function_ids_0_1.migrate);
-}
+#define	is_psci_0_1(what, func_id)					\
+	(kvm_host_psci_config.psci_0_1_ ## what ## _implemented &&	\
+	 (func_id) == kvm_host_psci_config.function_ids_0_1.what)
 
 static bool is_psci_0_1_call(u64 func_id)
 {
-	return is_psci_0_1_cpu_suspend(func_id) ||
-	       is_psci_0_1_cpu_on(func_id) ||
-	       is_psci_0_1_cpu_off(func_id) ||
-	       is_psci_0_1_migrate(func_id);
+	return (is_psci_0_1(cpu_suspend, func_id) ||
+		is_psci_0_1(cpu_on, func_id) ||
+		is_psci_0_1(cpu_off, func_id) ||
+		is_psci_0_1(migrate, func_id));
 }
 
 static bool is_psci_0_2_call(u64 func_id)
@@ -94,16 +62,6 @@ static bool is_psci_0_2_call(u64 func_id)
 	       (PSCI_0_2_FN64(0) <= func_id && func_id <= PSCI_0_2_FN64(31));
 }
 
-static bool is_psci_call(u64 func_id)
-{
-	switch (kvm_host_psci_config.version) {
-	case PSCI_VERSION(0, 1):
-		return is_psci_0_1_call(func_id);
-	default:
-		return is_psci_0_2_call(func_id);
-	}
-}
-
 static unsigned long psci_call(unsigned long fn, unsigned long arg0,
 			       unsigned long arg1, unsigned long arg2)
 {
@@ -273,14 +231,14 @@ asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
 
 static unsigned long psci_0_1_handler(u64 func_id, struct kvm_cpu_context *host_ctxt)
 {
-	if (is_psci_0_1_cpu_off(func_id) || is_psci_0_1_migrate(func_id))
+	if (is_psci_0_1(cpu_off, func_id) || is_psci_0_1(migrate, func_id))
 		return psci_forward(host_ctxt);
-	else if (is_psci_0_1_cpu_on(func_id))
+	if (is_psci_0_1(cpu_on, func_id))
 		return psci_cpu_on(func_id, host_ctxt);
-	else if (is_psci_0_1_cpu_suspend(func_id))
+	if (is_psci_0_1(cpu_suspend, func_id))
 		return psci_cpu_suspend(func_id, host_ctxt);
-	else
-		return PSCI_RET_NOT_SUPPORTED;
+
+	return PSCI_RET_NOT_SUPPORTED;
 }
 
 static unsigned long psci_0_2_handler(u64 func_id, struct kvm_cpu_context *host_ctxt)
@@ -322,20 +280,23 @@ static unsigned long psci_1_0_handler(u64 func_id, struct kvm_cpu_context *host_
 
 bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt)
 {
-	u64 func_id = get_psci_func_id(host_ctxt);
+	DECLARE_REG(u64, func_id, host_ctxt, 0);
 	unsigned long ret;
 
-	if (!is_psci_call(func_id))
-		return false;
-
 	switch (kvm_host_psci_config.version) {
 	case PSCI_VERSION(0, 1):
+		if (!is_psci_0_1_call(func_id))
+			return false;
 		ret = psci_0_1_handler(func_id, host_ctxt);
 		break;
 	case PSCI_VERSION(0, 2):
+		if (!is_psci_0_2_call(func_id))
+			return false;
 		ret = psci_0_2_handler(func_id, host_ctxt);
 		break;
 	default:
+		if (!is_psci_0_2_call(func_id))
+			return false;
 		ret = psci_1_0_handler(func_id, host_ctxt);
 		break;
 	}
-- 
2.29.2


_______________________________________________
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  parent reply	other threads:[~2021-01-07 11:22 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-07 11:20 [GIT PULL] KVM/arm64 fixes for 5.11, take #1 Marc Zyngier
2021-01-07 11:20 ` Marc Zyngier
2021-01-07 11:20 ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 01/18] KVM: arm64: Don't access PMCR_EL0 when no PMU is available Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 02/18] KVM: arm64: Prevent use of invalid PSCI v0.1 function IDs Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 03/18] KVM: arm64: Use lm_alias in nVHE-only VA conversion Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 04/18] KVM: arm64: Skip computing hyp VA layout for VHE Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 05/18] KVM: arm64: Minor cleanup of hyp variables used in host Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 06/18] KVM: arm64: Remove unused includes in psci-relay.c Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 07/18] KVM: arm64: Move skip_host_instruction to adjust_pc.h Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` Marc Zyngier [this message]
2021-01-07 11:20   ` [PATCH 08/18] KVM: arm64: Declutter host PSCI 0.1 handling Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 09/18] KVM: Documentation: Add arm64 KVM_RUN error codes Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 10/18] KVM: arm64: arch_timer: Remove VGIC initialization check Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 11/18] KVM: arm64: Move double-checked lock to kvm_vgic_map_resources() Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 12/18] KVM: arm64: Update comment in kvm_vgic_map_resources() Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 13/18] KVM: arm64: Remove redundant call to kvm_pmu_vcpu_reset() Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 14/18] KVM: arm64: Consolidate dist->ready setting into kvm_vgic_map_resources() Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 15/18] KVM: arm64: Fix hyp_cpu_pm_{init,exit} __init annotation Marc Zyngier
2021-01-07 11:20   ` [PATCH 15/18] KVM: arm64: Fix hyp_cpu_pm_{init, exit} " Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20 ` [PATCH 16/18] KVM: arm64: Remove spurious semicolon in reg_to_encoding() Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:20   ` Marc Zyngier
2021-01-07 11:21 ` [PATCH 17/18] KVM: arm64: Replace KVM_ARM_PMU with HW_PERF_EVENTS Marc Zyngier
2021-01-07 11:21   ` Marc Zyngier
2021-01-07 11:21   ` Marc Zyngier
2021-01-07 11:21 ` [PATCH 18/18] arm64: cpufeature: remove non-exist CONFIG_KVM_ARM_HOST Marc Zyngier
2021-01-07 11:21   ` Marc Zyngier
2021-01-07 11:21   ` Marc Zyngier
2021-01-07 18:19 ` [GIT PULL] KVM/arm64 fixes for 5.11, take #1 Paolo Bonzini
2021-01-07 18:19   ` Paolo Bonzini
2021-01-07 18:19   ` Paolo Bonzini
2021-01-07 23:09 ` Paolo Bonzini
2021-01-07 23:09   ` Paolo Bonzini
2021-01-07 23:09   ` Paolo Bonzini
2021-01-08  8:22   ` Marc Zyngier
2021-01-08  8:22     ` Marc Zyngier
2021-01-08  8:22     ` Marc Zyngier
2021-01-08 10:03     ` Paolo Bonzini
2021-01-08 10:03       ` Paolo Bonzini
2021-01-08 10:03       ` Paolo Bonzini

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