Merge branch 'kvm-kconfig'

Cleanups to Kconfig definitions for KVM

* replace HAVE_KVM with an architecture-dependent symbol, when CONFIG_KVM
  may or may not be available depending on CPU capabilities (MIPS)

* replace HAVE_KVM with IS_ENABLED(CONFIG_KVM) for host-side code that is
  not part of the KVM module, so that it is completely compiled out

* factor common "select" statements in common code instead of requiring
  each architecture to specify it

arch/arm64/Kconfig

@@ -216,7 +216,6 @@ config ARM64
 	select HAVE_HW_BREAKPOINT if PERF_EVENTS
 	select HAVE_IOREMAP_PROT
 	select HAVE_IRQ_TIME_ACCOUNTING
-	select HAVE_KVM
 	select HAVE_MOD_ARCH_SPECIFIC
 	select HAVE_NMI
 	select HAVE_PERF_EVENTS

arch/arm64/kvm/Kconfig

@@ -20,7 +20,6 @@ if VIRTUALIZATION
 
 menuconfig KVM
 	bool "Kernel-based Virtual Machine (KVM) support"
-	depends on HAVE_KVM
 	select KVM_COMMON
 	select KVM_GENERIC_HARDWARE_ENABLING
 	select KVM_GENERIC_MMU_NOTIFIER
@@ -34,7 +33,6 @@ menuconfig KVM
 	select HAVE_KVM_MSI
 	select HAVE_KVM_IRQCHIP
 	select HAVE_KVM_IRQ_ROUTING
-	select IRQ_BYPASS_MANAGER
 	select HAVE_KVM_IRQ_BYPASS
 	select HAVE_KVM_READONLY_MEM
 	select HAVE_KVM_VCPU_RUN_PID_CHANGE

arch/loongarch/Kconfig

@@ -133,7 +133,6 @@ config LOONGARCH
 	select HAVE_KPROBES
 	select HAVE_KPROBES_ON_FTRACE
 	select HAVE_KRETPROBES
-	select HAVE_KVM
 	select HAVE_MOD_ARCH_SPECIFIC
 	select HAVE_NMI
 	select HAVE_PCI

arch/loongarch/kvm/Kconfig

@@ -20,7 +20,6 @@ if VIRTUALIZATION
 config KVM
 	tristate "Kernel-based Virtual Machine (KVM) support"
 	depends on AS_HAS_LVZ_EXTENSION
-	depends on HAVE_KVM
 	select HAVE_KVM_DIRTY_RING_ACQ_REL
 	select HAVE_KVM_VCPU_ASYNC_IOCTL
 	select KVM_COMMON

arch/mips/Kconfig

@@ -1250,6 +1250,7 @@ config CPU_LOONGSON64
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_HUGEPAGES
 	select CPU_SUPPORTS_MSA
+	select CPU_SUPPORTS_VZ
 	select CPU_DIEI_BROKEN if !LOONGSON3_ENHANCEMENT
 	select CPU_MIPSR2_IRQ_VI
 	select DMA_NONCOHERENT
@@ -1261,7 +1262,6 @@ config CPU_LOONGSON64
 	select MIPS_FP_SUPPORT
 	select GPIOLIB
 	select SWIOTLB
-	select HAVE_KVM
 	help
 	  The Loongson GSx64(GS264/GS464/GS464E/GS464V) series of processor
 	  cores implements the MIPS64R2 instruction set with many extensions,
@@ -1374,7 +1374,6 @@ config CPU_MIPS32_R2
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
-	select HAVE_KVM
 	help
 	  Choose this option to build a kernel for release 2 or later of the
 	  MIPS32 architecture.  Most modern embedded systems with a 32-bit
@@ -1389,7 +1388,7 @@ config CPU_MIPS32_R5
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
-	select HAVE_KVM
+	select CPU_SUPPORTS_VZ
 	select MIPS_O32_FP64_SUPPORT
 	help
 	  Choose this option to build a kernel for release 5 or later of the
@@ -1405,7 +1404,7 @@ config CPU_MIPS32_R6
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
-	select HAVE_KVM
+	select CPU_SUPPORTS_VZ
 	select MIPS_O32_FP64_SUPPORT
 	help
 	  Choose this option to build a kernel for release 6 or later of the
@@ -1441,7 +1440,6 @@ config CPU_MIPS64_R2
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_HUGEPAGES
 	select CPU_SUPPORTS_MSA
-	select HAVE_KVM
 	help
 	  Choose this option to build a kernel for release 2 or later of the
 	  MIPS64 architecture.  Many modern embedded systems with a 64-bit
@@ -1459,7 +1457,7 @@ config CPU_MIPS64_R5
 	select CPU_SUPPORTS_HUGEPAGES
 	select CPU_SUPPORTS_MSA
 	select MIPS_O32_FP64_SUPPORT if 32BIT || MIPS32_O32
-	select HAVE_KVM
+	select CPU_SUPPORTS_VZ
 	help
 	  Choose this option to build a kernel for release 5 or later of the
 	  MIPS64 architecture.  This is a intermediate MIPS architecture
@@ -1477,7 +1475,7 @@ config CPU_MIPS64_R6
 	select CPU_SUPPORTS_HUGEPAGES
 	select CPU_SUPPORTS_MSA
 	select MIPS_O32_FP64_SUPPORT if 32BIT || MIPS32_O32
-	select HAVE_KVM
+	select CPU_SUPPORTS_VZ
 	help
 	  Choose this option to build a kernel for release 6 or later of the
 	  MIPS64 architecture.  New MIPS processors, starting with the Warrior
@@ -1492,9 +1490,9 @@ config CPU_P5600
 	select CPU_SUPPORTS_HIGHMEM
 	select CPU_SUPPORTS_MSA
 	select CPU_SUPPORTS_CPUFREQ
+	select CPU_SUPPORTS_VZ
 	select CPU_MIPSR2_IRQ_VI
 	select CPU_MIPSR2_IRQ_EI
-	select HAVE_KVM
 	select MIPS_O32_FP64_SUPPORT
 	help
 	  Choose this option to build a kernel for MIPS Warrior P5600 CPU.
@@ -1614,7 +1612,7 @@ config CPU_CAVIUM_OCTEON
 	select USB_EHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
 	select USB_OHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
 	select MIPS_L1_CACHE_SHIFT_7
-	select HAVE_KVM
+	select CPU_SUPPORTS_VZ
 	help
 	  The Cavium Octeon processor is a highly integrated chip containing
 	  many ethernet hardware widgets for networking tasks. The processor
@@ -1969,6 +1967,8 @@ config CPU_SUPPORTS_ADDRWINCFG
 config CPU_SUPPORTS_HUGEPAGES
 	bool
 	depends on !(32BIT && (PHYS_ADDR_T_64BIT || EVA))
+config CPU_SUPPORTS_VZ
+	bool
 config MIPS_PGD_C0_CONTEXT
 	bool
 	depends on 64BIT

arch/mips/kvm/Kconfig

@@ -17,7 +17,7 @@ if VIRTUALIZATION
 
 config KVM
 	tristate "Kernel-based Virtual Machine (KVM) support"
-	depends on HAVE_KVM
+	depends on CPU_SUPPORTS_VZ
 	depends on MIPS_FP_SUPPORT
 	select EXPORT_UASM
 	select KVM_COMMON

arch/powerpc/kvm/Kconfig

@@ -22,7 +22,6 @@ config KVM
 	select KVM_COMMON
 	select HAVE_KVM_VCPU_ASYNC_IOCTL
 	select KVM_VFIO
-	select IRQ_BYPASS_MANAGER
 	select HAVE_KVM_IRQ_BYPASS
 
 config KVM_BOOK3S_HANDLER

arch/s390/Kconfig

@@ -193,7 +193,6 @@ config S390
 	select HAVE_KPROBES
 	select HAVE_KPROBES_ON_FTRACE
 	select HAVE_KRETPROBES
-	select HAVE_KVM
 	select HAVE_LIVEPATCH
 	select HAVE_MEMBLOCK_PHYS_MAP
 	select HAVE_MOD_ARCH_SPECIFIC

arch/s390/kvm/Kconfig

@@ -19,7 +19,6 @@ if VIRTUALIZATION
 config KVM
 	def_tristate y
 	prompt "Kernel-based Virtual Machine (KVM) support"
-	depends on HAVE_KVM
 	select HAVE_KVM_CPU_RELAX_INTERCEPT
 	select HAVE_KVM_VCPU_ASYNC_IOCTL
 	select KVM_ASYNC_PF

arch/x86/Kconfig

@@ -244,7 +244,6 @@ config X86
 	select HAVE_FUNCTION_ERROR_INJECTION
 	select HAVE_KRETPROBES
 	select HAVE_RETHOOK
-	select HAVE_KVM
 	select HAVE_LIVEPATCH			if X86_64
 	select HAVE_MIXED_BREAKPOINTS_REGS
 	select HAVE_MOD_ARCH_SPECIFIC

arch/x86/include/asm/hardirq.h

@@ -15,7 +15,7 @@ typedef struct {
 	unsigned int irq_spurious_count;
 	unsigned int icr_read_retry_count;
 #endif
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 	unsigned int kvm_posted_intr_ipis;
 	unsigned int kvm_posted_intr_wakeup_ipis;
 	unsigned int kvm_posted_intr_nested_ipis;

arch/x86/include/asm/idtentry.h

@@ -675,7 +675,7 @@ DECLARE_IDTENTRY_SYSVEC(IRQ_WORK_VECTOR,		sysvec_irq_work);
 # endif
 #endif
 
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_VECTOR,		sysvec_kvm_posted_intr_ipi);
 DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_WAKEUP_VECTOR,	sysvec_kvm_posted_intr_wakeup_ipi);
 DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_NESTED_VECTOR,	sysvec_kvm_posted_intr_nested_ipi);

arch/x86/include/asm/irq.h

@@ -29,7 +29,7 @@ struct irq_desc;
 
 extern void fixup_irqs(void);
 
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 extern void kvm_set_posted_intr_wakeup_handler(void (*handler)(void));
 #endif
 

arch/x86/include/asm/irq_vectors.h

@@ -84,7 +84,7 @@
 #define HYPERVISOR_CALLBACK_VECTOR	0xf3
 
 /* Vector for KVM to deliver posted interrupt IPI */
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 #define POSTED_INTR_VECTOR		0xf2
 #define POSTED_INTR_WAKEUP_VECTOR	0xf1
 #define POSTED_INTR_NESTED_VECTOR	0xf0

arch/x86/kernel/idt.c

@@ -153,7 +153,7 @@ static const __initconst struct idt_data apic_idts[] = {
 #ifdef CONFIG_X86_LOCAL_APIC
 	INTG(LOCAL_TIMER_VECTOR,		asm_sysvec_apic_timer_interrupt),
 	INTG(X86_PLATFORM_IPI_VECTOR,		asm_sysvec_x86_platform_ipi),
-# ifdef CONFIG_HAVE_KVM
+# if IS_ENABLED(CONFIG_KVM)
 	INTG(POSTED_INTR_VECTOR,		asm_sysvec_kvm_posted_intr_ipi),
 	INTG(POSTED_INTR_WAKEUP_VECTOR,		asm_sysvec_kvm_posted_intr_wakeup_ipi),
 	INTG(POSTED_INTR_NESTED_VECTOR,		asm_sysvec_kvm_posted_intr_nested_ipi),

arch/x86/kernel/irq.c

@@ -164,7 +164,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 #if defined(CONFIG_X86_IO_APIC)
 	seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
 #endif
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 	seq_printf(p, "%*s: ", prec, "PIN");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->kvm_posted_intr_ipis);
@@ -290,7 +290,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_x86_platform_ipi)
 }
 #endif
 
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 static void dummy_handler(void) {}
 static void (*kvm_posted_intr_wakeup_handler)(void) = dummy_handler;
 

arch/x86/kvm/Kconfig

@@ -7,7 +7,6 @@ source "virt/kvm/Kconfig"
 
 menuconfig VIRTUALIZATION
 	bool "Virtualization"
-	depends on HAVE_KVM || X86
 	default y
 	help
 	  Say Y here to get to see options for using your Linux host to run other
@@ -20,7 +19,6 @@ if VIRTUALIZATION
 
 config KVM
 	tristate "Kernel-based Virtual Machine (KVM) support"
-	depends on HAVE_KVM
 	depends on HIGH_RES_TIMERS
 	depends on X86_LOCAL_APIC
 	select KVM_COMMON
@@ -29,7 +27,6 @@ config KVM
 	select HAVE_KVM_PFNCACHE
 	select HAVE_KVM_DIRTY_RING_TSO
 	select HAVE_KVM_DIRTY_RING_ACQ_REL
-	select IRQ_BYPASS_MANAGER
 	select HAVE_KVM_IRQ_BYPASS
 	select HAVE_KVM_IRQ_ROUTING
 	select HAVE_KVM_READONLY_MEM

drivers/vfio/vfio.h

@@ -434,7 +434,7 @@ static inline void vfio_virqfd_exit(void)
 }
 #endif
 
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 void vfio_device_get_kvm_safe(struct vfio_device *device, struct kvm *kvm);
 void vfio_device_put_kvm(struct vfio_device *device);
 #else

drivers/vfio/vfio_main.c

@@ -16,7 +16,7 @@
 #include <linux/fs.h>
 #include <linux/idr.h>
 #include <linux/iommu.h>
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 #include <linux/kvm_host.h>
 #endif
 #include <linux/list.h>
@@ -385,7 +385,7 @@ void vfio_unregister_group_dev(struct vfio_device *device)
 }
 EXPORT_SYMBOL_GPL(vfio_unregister_group_dev);
 
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 void vfio_device_get_kvm_safe(struct vfio_device *device, struct kvm *kvm)
 {
 	void (*pfn)(struct kvm *kvm);

scripts/gdb/linux/constants.py.in

@@ -130,7 +130,11 @@ LX_CONFIG(CONFIG_X86_MCE_THRESHOLD)
 LX_CONFIG(CONFIG_X86_MCE_AMD)
 LX_CONFIG(CONFIG_X86_MCE)
 LX_CONFIG(CONFIG_X86_IO_APIC)
-LX_CONFIG(CONFIG_HAVE_KVM)
+/*
+ * CONFIG_KVM can be "m" but it affects common code too.  Use CONFIG_KVM_COMMON
+ * as a proxy for IS_ENABLED(CONFIG_KVM).
+ */
+LX_CONFIG_KVM = IS_BUILTIN(CONFIG_KVM_COMMON)
 LX_CONFIG(CONFIG_NUMA)
 LX_CONFIG(CONFIG_ARM64)
 LX_CONFIG(CONFIG_ARM64_4K_PAGES)

scripts/gdb/linux/interrupts.py

@@ -151,7 +151,7 @@ def x86_show_interupts(prec):
         if cnt is not None:
             text += "%*s: %10u\n" % (prec, "MIS", cnt['counter'])
 
-    if constants.LX_CONFIG_HAVE_KVM:
+    if constants.LX_CONFIG_KVM:
         text += x86_show_irqstat(prec, "PIN", 'kvm_posted_intr_ipis', 'Posted-interrupt notification event')
         text += x86_show_irqstat(prec, "NPI", 'kvm_posted_intr_nested_ipis', 'Nested posted-interrupt event')
         text += x86_show_irqstat(prec, "PIW", 'kvm_posted_intr_wakeup_ipis', 'Posted-interrupt wakeup event')

tools/arch/x86/include/asm/irq_vectors.h

@@ -84,7 +84,7 @@
 #define HYPERVISOR_CALLBACK_VECTOR	0xf3
 
 /* Vector for KVM to deliver posted interrupt IPI */
-#ifdef CONFIG_HAVE_KVM
+#if IS_ENABLED(CONFIG_KVM)
 #define POSTED_INTR_VECTOR		0xf2
 #define POSTED_INTR_WAKEUP_VECTOR	0xf1
 #define POSTED_INTR_NESTED_VECTOR	0xf0

virt/kvm/Kconfig

 # SPDX-License-Identifier: GPL-2.0
 # KVM common configuration items and defaults
 
-config HAVE_KVM
-       bool
-
 config KVM_COMMON
        bool
        select EVENTFD
@@ -76,6 +73,7 @@ config KVM_COMPAT
 
 config HAVE_KVM_IRQ_BYPASS
        bool
+       select IRQ_BYPASS_MANAGER
 
 config HAVE_KVM_VCPU_ASYNC_IOCTL
        bool