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Commit 49c13b51 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (80 commits)
  KVM: Use CPU_DYING for disabling virtualization
  KVM: Tune hotplug/suspend IPIs
  KVM: Keep track of which cpus have virtualization enabled
  SMP: Allow smp_call_function_single() to current cpu
  i386: Allow smp_call_function_single() to current cpu
  x86_64: Allow smp_call_function_single() to current cpu
  HOTPLUG: Adapt thermal throttle to CPU_DYING
  HOTPLUG: Adapt cpuset hotplug callback to CPU_DYING
  HOTPLUG: Add CPU_DYING notifier
  KVM: Clean up #includes
  KVM: Remove kvmfs in favor of the anonymous inodes source
  KVM: SVM: Reliably detect if SVM was disabled by BIOS
  KVM: VMX: Remove unnecessary code in vmx_tlb_flush()
  KVM: MMU: Fix Wrong tlb flush order
  KVM: VMX: Reinitialize the real-mode tss when entering real mode
  KVM: Avoid useless memory write when possible
  KVM: Fix x86 emulator writeback
  KVM: Add support for in-kernel pio handlers
  KVM: VMX: Fix interrupt checking on lightweight exit
  KVM: Adds support for in-kernel mmio handlers
  ...
parents 492559af cec9ad27

arch/i386/kernel/cpu/mcheck/therm_throt.c

+4 −2
Original line number Diff line number Diff line
@@ -134,19 +134,21 @@ static __cpuinit int thermal_throttle_cpu_callback(struct notifier_block *nfb, 
	int err;



	sys_dev = get_cpu_sysdev(cpu);

	mutex_lock(&therm_cpu_lock);

	switch (action) {

	case CPU_ONLINE:

	case CPU_ONLINE_FROZEN:

		mutex_lock(&therm_cpu_lock);

		err = thermal_throttle_add_dev(sys_dev);

		mutex_unlock(&therm_cpu_lock);

		WARN_ON(err);

		break;

	case CPU_DEAD:

	case CPU_DEAD_FROZEN:

		mutex_lock(&therm_cpu_lock);

		thermal_throttle_remove_dev(sys_dev);

		mutex_unlock(&therm_cpu_lock);

		break;

	}

	mutex_unlock(&therm_cpu_lock);

	return NOTIFY_OK;

}

arch/i386/kernel/smpcommon.c

+5 −3
Original line number Diff line number Diff line
@@ -47,7 +47,7 @@ int smp_call_function(void (*func) (void *info), void *info, int nonatomic, 
EXPORT_SYMBOL(smp_call_function);



/**

 * smp_call_function_single - Run a function on another CPU

 * smp_call_function_single - Run a function on a specific CPU

 * @cpu: The target CPU.  Cannot be the calling CPU.

 * @func: The function to run. This must be fast and non-blocking.

 * @info: An arbitrary pointer to pass to the function.
@@ -66,9 +66,11 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, 
	int ret;

	int me = get_cpu();

	if (cpu == me) {

		WARN_ON(1);

		local_irq_disable();

		func(info);

		local_irq_enable();

		put_cpu();

		return -EBUSY;

		return 0;

	}



	ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);

arch/x86_64/kernel/smp.c

+8 −4
Original line number Diff line number Diff line
@@ -357,7 +357,7 @@ __smp_call_function_single(int cpu, void (*func) (void *info), void *info, 
}



/*

 * smp_call_function_single - Run a function on another CPU

 * smp_call_function_single - Run a function on a specific CPU

 * @func: The function to run. This must be fast and non-blocking.

 * @info: An arbitrary pointer to pass to the function.

 * @nonatomic: Currently unused.
@@ -374,14 +374,18 @@ int smp_call_function_single (int cpu, void (*func) (void *info), void *info, 
{

	/* prevent preemption and reschedule on another processor */

	int me = get_cpu();



	/* Can deadlock when called with interrupts disabled */

	WARN_ON(irqs_disabled());



	if (cpu == me) {

		local_irq_disable();

		func(info);

		local_irq_enable();

		put_cpu();

		return 0;

	}



	/* Can deadlock when called with interrupts disabled */

	WARN_ON(irqs_disabled());



	spin_lock_bh(&call_lock);

	__smp_call_function_single(cpu, func, info, nonatomic, wait);

	spin_unlock_bh(&call_lock);

drivers/kvm/Kconfig

+7 −2
Original line number Diff line number Diff line 
#

# KVM configuration

#

menu "Virtualization"

menuconfig VIRTUALIZATION

	bool "Virtualization"

	depends on X86

	default y



if VIRTUALIZATION



config KVM

	tristate "Kernel-based Virtual Machine (KVM) support"

	depends on X86 && EXPERIMENTAL

	depends on X86_CMPXCHG64 || 64BIT

	---help---

	  Support hosting fully virtualized guest machines using hardware

	  virtualization extensions.  You will need a fairly recent
@@ -35,4 +40,4 @@ config KVM_AMD 
	  Provides support for KVM on AMD processors equipped with the AMD-V

	  (SVM) extensions.



endmenu
 
endif # VIRTUALIZATION

drivers/kvm/kvm.h

+108 −8
Original line number Diff line number Diff line
@@ -10,6 +10,8 @@ 
#include <linux/list.h>

#include <linux/mutex.h>

#include <linux/spinlock.h>

#include <linux/signal.h>

#include <linux/sched.h>

#include <linux/mm.h>

#include <asm/signal.h>
@@ -18,6 +20,7 @@ 
#include <linux/kvm_para.h>



#define CR0_PE_MASK (1ULL << 0)

#define CR0_MP_MASK (1ULL << 1)

#define CR0_TS_MASK (1ULL << 3)

#define CR0_NE_MASK (1ULL << 5)

#define CR0_WP_MASK (1ULL << 16)
@@ -42,7 +45,8 @@ 
	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \

	 | CR0_NW_MASK | CR0_CD_MASK)

#define KVM_VM_CR0_ALWAYS_ON \

	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK)

	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK | CR0_TS_MASK \

	 | CR0_MP_MASK)

#define KVM_GUEST_CR4_MASK \

	(CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)

#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
@@ -51,10 +55,10 @@ 
#define INVALID_PAGE (~(hpa_t)0)

#define UNMAPPED_GVA (~(gpa_t)0)



#define KVM_MAX_VCPUS 1

#define KVM_MAX_VCPUS 4

#define KVM_ALIAS_SLOTS 4

#define KVM_MEMORY_SLOTS 4

#define KVM_NUM_MMU_PAGES 256

#define KVM_NUM_MMU_PAGES 1024

#define KVM_MIN_FREE_MMU_PAGES 5

#define KVM_REFILL_PAGES 25

#define KVM_MAX_CPUID_ENTRIES 40
@@ -79,6 +83,11 @@ 


#define KVM_PIO_PAGE_OFFSET 1



/*

 * vcpu->requests bit members

 */

#define KVM_TLB_FLUSH 0



/*

 * Address types:

 *
@@ -137,7 +146,7 @@ struct kvm_mmu_page { 
	gfn_t gfn;

	union kvm_mmu_page_role role;



	hpa_t page_hpa;

	u64 *spt;

	unsigned long slot_bitmap; /* One bit set per slot which has memory

				    * in this shadow page.

				    */
@@ -232,6 +241,7 @@ struct kvm_pio_request { 
	struct page *guest_pages[2];

	unsigned guest_page_offset;

	int in;

	int port;

	int size;

	int string;

	int down;
@@ -252,8 +262,70 @@ struct kvm_stat { 
	u32 halt_exits;

	u32 request_irq_exits;

	u32 irq_exits;

	u32 light_exits;

	u32 efer_reload;

};



struct kvm_io_device {

	void (*read)(struct kvm_io_device *this,

		     gpa_t addr,

		     int len,

		     void *val);

	void (*write)(struct kvm_io_device *this,

		      gpa_t addr,

		      int len,

		      const void *val);

	int (*in_range)(struct kvm_io_device *this, gpa_t addr);

	void (*destructor)(struct kvm_io_device *this);



	void             *private;

};



static inline void kvm_iodevice_read(struct kvm_io_device *dev,

				     gpa_t addr,

				     int len,

				     void *val)

{

	dev->read(dev, addr, len, val);

}



static inline void kvm_iodevice_write(struct kvm_io_device *dev,

				      gpa_t addr,

				      int len,

				      const void *val)

{

	dev->write(dev, addr, len, val);

}



static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)

{

	return dev->in_range(dev, addr);

}



static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)

{

	if (dev->destructor)

		dev->destructor(dev);

}



/*

 * It would be nice to use something smarter than a linear search, TBD...

 * Thankfully we dont expect many devices to register (famous last words :),

 * so until then it will suffice.  At least its abstracted so we can change

 * in one place.

 */

struct kvm_io_bus {

	int                   dev_count;

#define NR_IOBUS_DEVS 6

	struct kvm_io_device *devs[NR_IOBUS_DEVS];

};



void kvm_io_bus_init(struct kvm_io_bus *bus);

void kvm_io_bus_destroy(struct kvm_io_bus *bus);

struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);

void kvm_io_bus_register_dev(struct kvm_io_bus *bus,

			     struct kvm_io_device *dev);



struct kvm_vcpu {

	struct kvm *kvm;

	union {
@@ -266,6 +338,8 @@ struct kvm_vcpu { 
	u64 host_tsc;

	struct kvm_run *run;

	int interrupt_window_open;

	int guest_mode;

	unsigned long requests;

	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */

#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)

	unsigned long irq_pending[NR_IRQ_WORDS];
@@ -285,15 +359,20 @@ struct kvm_vcpu { 
	u64 apic_base;

	u64 ia32_misc_enable_msr;

	int nmsrs;

	int save_nmsrs;

	int msr_offset_efer;

#ifdef CONFIG_X86_64

	int msr_offset_kernel_gs_base;

#endif

	struct vmx_msr_entry *guest_msrs;

	struct vmx_msr_entry *host_msrs;



	struct list_head free_pages;

	struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];

	struct kvm_mmu mmu;



	struct kvm_mmu_memory_cache mmu_pte_chain_cache;

	struct kvm_mmu_memory_cache mmu_rmap_desc_cache;

	struct kvm_mmu_memory_cache mmu_page_cache;

	struct kvm_mmu_memory_cache mmu_page_header_cache;



	gfn_t last_pt_write_gfn;

	int   last_pt_write_count;
@@ -305,6 +384,11 @@ struct kvm_vcpu { 
	char *guest_fx_image;

	int fpu_active;

	int guest_fpu_loaded;

	struct vmx_host_state {

		int loaded;

		u16 fs_sel, gs_sel, ldt_sel;

		int fs_gs_ldt_reload_needed;

	} vmx_host_state;



	int mmio_needed;

	int mmio_read_completed;
@@ -331,6 +415,7 @@ struct kvm_vcpu { 
			u32 ar;

		} tr, es, ds, fs, gs;

	} rmode;

	int halt_request; /* real mode on Intel only */



	int cpuid_nent;

	struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
@@ -362,12 +447,15 @@ struct kvm { 
	struct list_head active_mmu_pages;

	int n_free_mmu_pages;

	struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];

	int nvcpus;

	struct kvm_vcpu vcpus[KVM_MAX_VCPUS];

	int memory_config_version;

	int busy;

	unsigned long rmap_overflow;

	struct list_head vm_list;

	struct file *filp;

	struct kvm_io_bus mmio_bus;

	struct kvm_io_bus pio_bus;

};



struct descriptor_table {
@@ -488,6 +576,7 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, 
		  int size, unsigned long count, int string, int down,

		  gva_t address, int rep, unsigned port);

void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);

int kvm_emulate_halt(struct kvm_vcpu *vcpu);

int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);

int emulate_clts(struct kvm_vcpu *vcpu);

int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
@@ -511,6 +600,7 @@ void save_msrs(struct vmx_msr_entry *e, int n); 
void kvm_resched(struct kvm_vcpu *vcpu);

void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);

void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);

void kvm_flush_remote_tlbs(struct kvm *kvm);



int kvm_read_guest(struct kvm_vcpu *vcpu,

	       gva_t addr,
@@ -524,10 +614,12 @@ int kvm_write_guest(struct kvm_vcpu *vcpu, 


unsigned long segment_base(u16 selector);



void kvm_mmu_pre_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);

void kvm_mmu_post_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);

void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,

		       const u8 *old, const u8 *new, int bytes);

int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);

void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);

int kvm_mmu_load(struct kvm_vcpu *vcpu);

void kvm_mmu_unload(struct kvm_vcpu *vcpu);



int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
@@ -539,6 +631,14 @@ static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, 
	return vcpu->mmu.page_fault(vcpu, gva, error_code);

}



static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)

{

	if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))

		return 0;



	return kvm_mmu_load(vcpu);

}



static inline int is_long_mode(struct kvm_vcpu *vcpu)

{

#ifdef CONFIG_X86_64