linux-kernel - [RFC PATCH 04/14] KVM: x86: Create stubs for a new VAC module

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Message-ID: <20231107202002.667900-5-aghulati@google.com>
Date:   Tue,  7 Nov 2023 20:19:52 +0000
From:   Anish Ghulati <aghulati@...gle.com>
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        hpa@...or.com, Vitaly Kuznetsov <vkuznets@...hat.com>,
        peterz@...radead.org, paulmck@...nel.org,
        Mark Rutland <mark.rutland@....com>
Cc:     Anish Ghulati <aghulati@...gle.com>
Subject: [RFC PATCH 04/14] KVM: x86: Create stubs for a new VAC module

Create emtpy stub files for what will eventually be a new module named
Virtualization Acceleration Code: Unupgradable Units Module (backronym:
VACUUM, or VAC for short). VAC will function as a base module for
multiple KVM modules and will contain the code needed to manage
system-wide virtualization resources, like enabling/disabling
virtualization hardware.

Signed-off-by: Anish Ghulati <aghulati@...gle.com>
---
 arch/x86/kvm/Makefile  | 2 ++
 arch/x86/kvm/svm/vac.c | 2 ++
 arch/x86/kvm/vac.c     | 3 +++
 arch/x86/kvm/vac.h     | 6 ++++++
 arch/x86/kvm/vmx/vac.c | 2 ++
 virt/kvm/Makefile.kvm  | 1 +
 virt/kvm/vac.c         | 3 +++
 virt/kvm/vac.h         | 6 ++++++
 8 files changed, 25 insertions(+)
 create mode 100644 arch/x86/kvm/svm/vac.c
 create mode 100644 arch/x86/kvm/vac.c
 create mode 100644 arch/x86/kvm/vac.h
 create mode 100644 arch/x86/kvm/vmx/vac.c
 create mode 100644 virt/kvm/vac.c
 create mode 100644 virt/kvm/vac.h

diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 3e965c90e065..b3de4bd7988f 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -13,6 +13,8 @@ kvm-y			+= x86.o emulate.o i8259.o irq.o lapic.o \
 			   hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \
 			   mmu/spte.o
 
+kvm-y                   += vac.o vmx/vac.o svm/vac.o
+
 ifdef CONFIG_HYPERV
 kvm-y			+= kvm_onhyperv.o
 endif
diff --git a/arch/x86/kvm/svm/vac.c b/arch/x86/kvm/svm/vac.c
new file mode 100644
index 000000000000..4aabf16d2fc0
--- /dev/null
+++ b/arch/x86/kvm/svm/vac.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
diff --git a/arch/x86/kvm/vac.c b/arch/x86/kvm/vac.c
new file mode 100644
index 000000000000..18d2ae7d3e47
--- /dev/null
+++ b/arch/x86/kvm/vac.c
@@ -0,0 +1,3 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "vac.h"
diff --git a/arch/x86/kvm/vac.h b/arch/x86/kvm/vac.h
new file mode 100644
index 000000000000..4d5dc4700f4e
--- /dev/null
+++ b/arch/x86/kvm/vac.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef ARCH_X86_KVM_VAC_H
+#define ARCH_X86_KVM_VAC_H
+
+#endif // ARCH_X86_KVM_VAC_H
diff --git a/arch/x86/kvm/vmx/vac.c b/arch/x86/kvm/vmx/vac.c
new file mode 100644
index 000000000000..4aabf16d2fc0
--- /dev/null
+++ b/arch/x86/kvm/vmx/vac.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
diff --git a/virt/kvm/Makefile.kvm b/virt/kvm/Makefile.kvm
index 4de10d447ef3..7876021ea4d7 100644
--- a/virt/kvm/Makefile.kvm
+++ b/virt/kvm/Makefile.kvm
@@ -11,6 +11,7 @@ kvm-y := $(KVM)/kvm_main.o $(KVM)/eventfd.o $(KVM)/binary_stats.o
 ifdef CONFIG_VFIO
 kvm-y += $(KVM)/vfio.o
 endif
+kvm-y += $(KVM)/vac.o
 kvm-$(CONFIG_KVM_MMIO) += $(KVM)/coalesced_mmio.o
 kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o
 kvm-$(CONFIG_HAVE_KVM_IRQ_ROUTING) += $(KVM)/irqchip.o
diff --git a/virt/kvm/vac.c b/virt/kvm/vac.c
new file mode 100644
index 000000000000..18d2ae7d3e47
--- /dev/null
+++ b/virt/kvm/vac.c
@@ -0,0 +1,3 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "vac.h"
diff --git a/virt/kvm/vac.h b/virt/kvm/vac.h
new file mode 100644
index 000000000000..8f7123a916c5
--- /dev/null
+++ b/virt/kvm/vac.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __KVM_VAC_H__
+#define __KVM_VAC_H__
+
+#endif
-- 
2.42.0.869.gea05f2083d-goog