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From: Andrew Scull <ascull@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org, kernel-team@android.com,
	maz@kernel.org, Sudeep Holla <sudeep.holla@arm.com>,
	catalin.marinas@arm.com, will@kernel.org
Subject: [PATCH v4 02/19] KVM: arm64: Remove hyp_panic arguments
Date: Tue, 15 Sep 2020 11:46:26 +0100	[thread overview]
Message-ID: <20200915104643.2543892-3-ascull@google.com> (raw)
In-Reply-To: <20200915104643.2543892-1-ascull@google.com>

hyp_panic is able to find all the context it needs from within itself so
remove the argument. The __hyp_panic wrapper becomes redundant so is
also removed.

Signed-off-by: Andrew Scull <ascull@google.com>
---
 arch/arm64/include/asm/kvm_hyp.h        |  2 +-
 arch/arm64/kvm/hyp/hyp-entry.S          |  7 +------
 arch/arm64/kvm/hyp/include/hyp/switch.h |  4 +---
 arch/arm64/kvm/hyp/nvhe/switch.c        |  8 ++++++--
 arch/arm64/kvm/hyp/vhe/switch.c         | 10 ++++++----
 5 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 46689e7db46c..3de99b323061 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -89,7 +89,7 @@ void deactivate_traps_vhe_put(void);
 
 u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt);
 
-void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt);
+void __noreturn hyp_panic(void);
 #ifdef __KVM_NVHE_HYPERVISOR__
 void __noreturn __hyp_do_panic(unsigned long, ...);
 #endif
diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
index 46b4dab933d0..9cb3fbca5d79 100644
--- a/arch/arm64/kvm/hyp/hyp-entry.S
+++ b/arch/arm64/kvm/hyp/hyp-entry.S
@@ -210,12 +210,7 @@ SYM_FUNC_START(__hyp_do_panic)
 SYM_FUNC_END(__hyp_do_panic)
 #endif
 
-SYM_CODE_START(__hyp_panic)
-	get_host_ctxt x0, x1
-	b	hyp_panic
-SYM_CODE_END(__hyp_panic)
-
-.macro invalid_vector	label, target = __hyp_panic
+.macro invalid_vector	label, target = hyp_panic
 	.align	2
 SYM_CODE_START(\label)
 	b \target
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index 0864f88bc840..96ea3fdd0c20 100644
--- a/arch/arm64/kvm/hyp/include/hyp/switch.h
+++ b/arch/arm64/kvm/hyp/include/hyp/switch.h
@@ -510,13 +510,11 @@ static inline void __set_host_arch_workaround_state(struct kvm_vcpu *vcpu)
 static inline void __kvm_unexpected_el2_exception(void)
 {
 	unsigned long addr, fixup;
-	struct kvm_cpu_context *host_ctxt;
 	struct exception_table_entry *entry, *end;
 	unsigned long elr_el2 = read_sysreg(elr_el2);
 
 	entry = hyp_symbol_addr(__start___kvm_ex_table);
 	end = hyp_symbol_addr(__stop___kvm_ex_table);
-	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
 
 	while (entry < end) {
 		addr = (unsigned long)&entry->insn + entry->insn;
@@ -531,7 +529,7 @@ static inline void __kvm_unexpected_el2_exception(void)
 		return;
 	}
 
-	hyp_panic(host_ctxt);
+	hyp_panic();
 }
 
 #endif /* __ARM64_KVM_HYP_SWITCH_H__ */
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 3c9c065b3264..26d6fd4b6f4d 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -242,14 +242,18 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
 	return exit_code;
 }
 
-void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
+void __noreturn hyp_panic(void)
 {
 	u64 spsr = read_sysreg_el2(SYS_SPSR);
 	u64 elr = read_sysreg_el2(SYS_ELR);
 	u64 par = read_sysreg(par_el1);
-	struct kvm_vcpu *vcpu = host_ctxt->__hyp_running_vcpu;
+	struct kvm_cpu_context *host_ctxt;
+	struct kvm_vcpu *vcpu;
 	unsigned long str_va;
 
+	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
+	vcpu = host_ctxt->__hyp_running_vcpu;
+
 	if (read_sysreg(vttbr_el2)) {
 		__timer_disable_traps(vcpu);
 		__deactivate_traps(vcpu);
diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c
index 6636522a8529..c1fd47557713 100644
--- a/arch/arm64/kvm/hyp/vhe/switch.c
+++ b/arch/arm64/kvm/hyp/vhe/switch.c
@@ -192,10 +192,12 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
 	return ret;
 }
 
-static void __hyp_call_panic(u64 spsr, u64 elr, u64 par,
-			     struct kvm_cpu_context *host_ctxt)
+static void __hyp_call_panic(u64 spsr, u64 elr, u64 par)
 {
+	struct kvm_cpu_context *host_ctxt;
 	struct kvm_vcpu *vcpu;
+
+	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
 	vcpu = host_ctxt->__hyp_running_vcpu;
 
 	__deactivate_traps(vcpu);
@@ -208,13 +210,13 @@ static void __hyp_call_panic(u64 spsr, u64 elr, u64 par,
 }
 NOKPROBE_SYMBOL(__hyp_call_panic);
 
-void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
+void __noreturn hyp_panic(void)
 {
 	u64 spsr = read_sysreg_el2(SYS_SPSR);
 	u64 elr = read_sysreg_el2(SYS_ELR);
 	u64 par = read_sysreg(par_el1);
 
-	__hyp_call_panic(spsr, elr, par, host_ctxt);
+	__hyp_call_panic(spsr, elr, par);
 	unreachable();
 }
 
-- 
2.28.0.618.gf4bc123cb7-goog

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

WARNING: multiple messages have this Message-ID (diff)
From: Andrew Scull <ascull@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org, kernel-team@android.com,
	suzuki.poulose@arm.com, maz@kernel.org,
	Sudeep Holla <sudeep.holla@arm.com>,
	james.morse@arm.com, Andrew Scull <ascull@google.com>,
	catalin.marinas@arm.com, will@kernel.org,
	julien.thierry.kdev@gmail.com
Subject: [PATCH v4 02/19] KVM: arm64: Remove hyp_panic arguments
Date: Tue, 15 Sep 2020 11:46:26 +0100	[thread overview]
Message-ID: <20200915104643.2543892-3-ascull@google.com> (raw)
In-Reply-To: <20200915104643.2543892-1-ascull@google.com>

hyp_panic is able to find all the context it needs from within itself so
remove the argument. The __hyp_panic wrapper becomes redundant so is
also removed.

Signed-off-by: Andrew Scull <ascull@google.com>
---
 arch/arm64/include/asm/kvm_hyp.h        |  2 +-
 arch/arm64/kvm/hyp/hyp-entry.S          |  7 +------
 arch/arm64/kvm/hyp/include/hyp/switch.h |  4 +---
 arch/arm64/kvm/hyp/nvhe/switch.c        |  8 ++++++--
 arch/arm64/kvm/hyp/vhe/switch.c         | 10 ++++++----
 5 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 46689e7db46c..3de99b323061 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -89,7 +89,7 @@ void deactivate_traps_vhe_put(void);
 
 u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt);
 
-void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt);
+void __noreturn hyp_panic(void);
 #ifdef __KVM_NVHE_HYPERVISOR__
 void __noreturn __hyp_do_panic(unsigned long, ...);
 #endif
diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
index 46b4dab933d0..9cb3fbca5d79 100644
--- a/arch/arm64/kvm/hyp/hyp-entry.S
+++ b/arch/arm64/kvm/hyp/hyp-entry.S
@@ -210,12 +210,7 @@ SYM_FUNC_START(__hyp_do_panic)
 SYM_FUNC_END(__hyp_do_panic)
 #endif
 
-SYM_CODE_START(__hyp_panic)
-	get_host_ctxt x0, x1
-	b	hyp_panic
-SYM_CODE_END(__hyp_panic)
-
-.macro invalid_vector	label, target = __hyp_panic
+.macro invalid_vector	label, target = hyp_panic
 	.align	2
 SYM_CODE_START(\label)
 	b \target
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index 0864f88bc840..96ea3fdd0c20 100644
--- a/arch/arm64/kvm/hyp/include/hyp/switch.h
+++ b/arch/arm64/kvm/hyp/include/hyp/switch.h
@@ -510,13 +510,11 @@ static inline void __set_host_arch_workaround_state(struct kvm_vcpu *vcpu)
 static inline void __kvm_unexpected_el2_exception(void)
 {
 	unsigned long addr, fixup;
-	struct kvm_cpu_context *host_ctxt;
 	struct exception_table_entry *entry, *end;
 	unsigned long elr_el2 = read_sysreg(elr_el2);
 
 	entry = hyp_symbol_addr(__start___kvm_ex_table);
 	end = hyp_symbol_addr(__stop___kvm_ex_table);
-	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
 
 	while (entry < end) {
 		addr = (unsigned long)&entry->insn + entry->insn;
@@ -531,7 +529,7 @@ static inline void __kvm_unexpected_el2_exception(void)
 		return;
 	}
 
-	hyp_panic(host_ctxt);
+	hyp_panic();
 }
 
 #endif /* __ARM64_KVM_HYP_SWITCH_H__ */
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 3c9c065b3264..26d6fd4b6f4d 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -242,14 +242,18 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
 	return exit_code;
 }
 
-void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
+void __noreturn hyp_panic(void)
 {
 	u64 spsr = read_sysreg_el2(SYS_SPSR);
 	u64 elr = read_sysreg_el2(SYS_ELR);
 	u64 par = read_sysreg(par_el1);
-	struct kvm_vcpu *vcpu = host_ctxt->__hyp_running_vcpu;
+	struct kvm_cpu_context *host_ctxt;
+	struct kvm_vcpu *vcpu;
 	unsigned long str_va;
 
+	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
+	vcpu = host_ctxt->__hyp_running_vcpu;
+
 	if (read_sysreg(vttbr_el2)) {
 		__timer_disable_traps(vcpu);
 		__deactivate_traps(vcpu);
diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c
index 6636522a8529..c1fd47557713 100644
--- a/arch/arm64/kvm/hyp/vhe/switch.c
+++ b/arch/arm64/kvm/hyp/vhe/switch.c
@@ -192,10 +192,12 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
 	return ret;
 }
 
-static void __hyp_call_panic(u64 spsr, u64 elr, u64 par,
-			     struct kvm_cpu_context *host_ctxt)
+static void __hyp_call_panic(u64 spsr, u64 elr, u64 par)
 {
+	struct kvm_cpu_context *host_ctxt;
 	struct kvm_vcpu *vcpu;
+
+	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
 	vcpu = host_ctxt->__hyp_running_vcpu;
 
 	__deactivate_traps(vcpu);
@@ -208,13 +210,13 @@ static void __hyp_call_panic(u64 spsr, u64 elr, u64 par,
 }
 NOKPROBE_SYMBOL(__hyp_call_panic);
 
-void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
+void __noreturn hyp_panic(void)
 {
 	u64 spsr = read_sysreg_el2(SYS_SPSR);
 	u64 elr = read_sysreg_el2(SYS_ELR);
 	u64 par = read_sysreg(par_el1);
 
-	__hyp_call_panic(spsr, elr, par, host_ctxt);
+	__hyp_call_panic(spsr, elr, par);
 	unreachable();
 }
 
-- 
2.28.0.618.gf4bc123cb7-goog


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-09-15 10:46 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-15 10:46 [PATCH v4 00/19] Introduce separate nVHE hyp context Andrew Scull
2020-09-15 10:46 ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 01/19] KVM: arm64: Remove __activate_vm wrapper Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` Andrew Scull [this message]
2020-09-15 10:46   ` [PATCH v4 02/19] KVM: arm64: Remove hyp_panic arguments Andrew Scull
2020-09-15 10:46 ` [PATCH v4 03/19] KVM: arm64: Remove kvm_host_data_t typedef Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 04/19] KVM: arm64: Choose hyp symbol based on context Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 05/19] KVM: arm64: Save chosen hyp vector to a percpu variable Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 06/19] KVM: arm64: nVHE: Use separate vector for the host Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 07/19] KVM: arm64: nVHE: Don't consume host SErrors with ESB Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 08/19] KVM: arm64: Introduce hyp context Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 09/19] KVM: arm64: Update context references from host to hyp Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 10/19] KVM: arm64: Restore hyp when panicking in guest context Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-16 11:20   ` Marc Zyngier
2020-09-16 11:20     ` Marc Zyngier
2020-09-15 10:46 ` [PATCH v4 11/19] KVM: arm64: Share context save and restore macros Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 12/19] KVM: arm64: nVHE: Switch to hyp context for EL2 Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-16 13:14   ` Marc Zyngier
2020-09-16 13:14     ` Marc Zyngier
2020-09-15 10:46 ` [PATCH v4 13/19] KVM: arm64: nVHE: Handle hyp panics Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 14/19] KVM: arm64: nVHE: Pass pointers consistently to hyp-init Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 15/19] smccc: Define vendor hyp owned service call region Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 16/19] smccc: Use separate variables for args and results Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 17/19] KVM: arm64: nVHE: Migrate hyp interface to SMCCC Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 18/19] KVM: arm64: nVHE: Migrate hyp-init " Andrew Scull
2020-09-15 10:46   ` Andrew Scull
2020-09-15 10:46 ` [PATCH v4 19/19] KVM: arm64: nVHE: Fix pointers during SMCCC convertion Andrew Scull
2020-09-15 10:46   ` Andrew Scull

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