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From: Sudeep Holla <sudeep.holla@arm.com>
To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org
Cc: Sudeep Holla <sudeep.holla@arm.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Christoffer Dall <christoffer.dall@arm.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Pouloze <suzuki.poulose@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Julien Thierry <julien.thierry@arm.com>
Subject: [PATCH v2 04/15] arm64: KVM: define SPE data structure for each vcpu
Date: Thu, 23 May 2019 11:34:51 +0100	[thread overview]
Message-ID: <20190523103502.25925-5-sudeep.holla@arm.com> (raw)
In-Reply-To: <20190523103502.25925-1-sudeep.holla@arm.com>

In order to support virtual SPE for guest, so define some basic structs.
This features depends on host having hardware with SPE support.

Since we can support this only on ARM64, add a separate config symbol
for the same.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 arch/arm64/include/asm/kvm_host.h |  2 ++
 arch/arm64/kvm/Kconfig            |  7 +++++++
 include/kvm/arm_spe.h             | 18 ++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 include/kvm/arm_spe.h

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 2a8d3f8ca22c..611a4884fb6c 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -46,6 +46,7 @@
 #include <kvm/arm_vgic.h>
 #include <kvm/arm_arch_timer.h>
 #include <kvm/arm_pmu.h>
+#include <kvm/arm_spe.h>
 
 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
 
@@ -304,6 +305,7 @@ struct kvm_vcpu_arch {
 	struct vgic_cpu vgic_cpu;
 	struct arch_timer_cpu timer_cpu;
 	struct kvm_pmu pmu;
+	struct kvm_spe spe;
 
 	/*
 	 * Anything that is not used directly from assembly code goes
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index a67121d419a2..3e178894ddd8 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -33,6 +33,7 @@ config KVM
 	select HAVE_KVM_EVENTFD
 	select HAVE_KVM_IRQFD
 	select KVM_ARM_PMU if HW_PERF_EVENTS
+	select KVM_ARM_SPE if (HW_PERF_EVENTS && ARM_SPE_PMU)
 	select HAVE_KVM_MSI
 	select HAVE_KVM_IRQCHIP
 	select HAVE_KVM_IRQ_ROUTING
@@ -57,6 +58,12 @@ config KVM_ARM_PMU
 	  Adds support for a virtual Performance Monitoring Unit (PMU) in
 	  virtual machines.
 
+config KVM_ARM_SPE
+	bool
+	---help---
+	  Adds support for a virtual Statistical Profiling Extension(SPE) in
+	  virtual machines.
+
 config KVM_INDIRECT_VECTORS
        def_bool KVM && (HARDEN_BRANCH_PREDICTOR || HARDEN_EL2_VECTORS)
 
diff --git a/include/kvm/arm_spe.h b/include/kvm/arm_spe.h
new file mode 100644
index 000000000000..8c96bdfad6ac
--- /dev/null
+++ b/include/kvm/arm_spe.h
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 ARM Ltd.
+ */
+
+#ifndef __ASM_ARM_KVM_SPE_H
+#define __ASM_ARM_KVM_SPE_H
+
+#include <uapi/linux/kvm.h>
+#include <linux/kvm_host.h>
+
+struct kvm_spe {
+	int irq;
+	bool ready; /* indicates that SPE KVM instance is ready for use */
+	bool created; /* SPE KVM instance is created, may not be ready yet */
+};
+
+#endif /* __ASM_ARM_KVM_SPE_H */
-- 
2.17.1


  parent reply	other threads:[~2019-05-23 10:36 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-23 10:34 [PATCH 00/15] arm64: KVM: add SPE profiling support for guest Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 01/15] KVM: arm64: add {read,write}_sysreg_elx_s versions for new registers Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 02/15] dt-bindings: ARM SPE: highlight the need for PPI partitions on heterogeneous systems Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 03/15] arm64: KVM: reset E2PB correctly in MDCR_EL2 when exiting the guest(VHE) Sudeep Holla
2019-05-23 10:34 ` Sudeep Holla [this message]
2019-05-23 10:34 ` [PATCH v2 05/15] arm64: KVM: add access handler for SPE system registers Sudeep Holla
2019-05-24 11:36   ` Julien Thierry
2019-05-24 14:12     ` Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 06/15] arm64: KVM/VHE: enable the use PMSCR_EL12 on VHE systems Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 07/15] arm64: KVM: split debug save restore across vm/traps activation Sudeep Holla
2019-05-28  8:18   ` Julien Thierry
2019-05-23 10:34 ` [PATCH v2 08/15] arm64: KVM/debug: drop pmscr_el1 and use sys_regs[PMSCR_EL1] in kvm_cpu_context Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 09/15] arm64: KVM: add support to save/restore SPE profiling buffer controls Sudeep Holla
2019-05-29  8:26   ` Julien Thierry
2019-05-23 10:34 ` [PATCH v2 10/15] arm64: KVM: enable conditional save/restore full " Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 11/15] arm64: KVM/debug: trap all accesses to SPE controls at EL1 Sudeep Holla
2019-05-23 10:34 ` [PATCH v2 12/15] KVM: arm64: add a new vcpu device control group for SPEv1 Sudeep Holla
2019-05-24 10:37   ` Marc Zyngier
2019-05-24 11:21     ` Sudeep Holla
2019-05-24 12:07       ` Marc Zyngier
2019-05-23 10:35 ` [PATCH v2 13/15] KVM: arm64: enable SPE support Sudeep Holla
2019-05-23 10:35 ` [PATCH v2 14/15][KVMTOOL] update_headers: Sync kvm UAPI headers with linux v5.2-rc1 Sudeep Holla
2019-05-23 10:35 ` [PATCH v2 15/15][KVMTOOL] kvm: add a vcpu feature for SPEv1 support Sudeep Holla

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