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Message-Id: <20061128124349.7E31C25015E@cleopatra.q>
Date: Tue, 28 Nov 2006 12:43:49 -0000
From: Avi Kivity <avi@...ranet.com>
To: kvm-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org, akpm@...l.org,
yaniv.kamay@...ranet.com, mingo@...e.hu
Subject: [PATCH 5/6] KVM: AMD SVM: Implementation
Implement the kvm function vector.
Signed-off-by: Yaniv Kamay <yaniv@...ranet.com>
Signed-off-by: Avi Kivity <avi@...ranet.com>
Index: linux-2.6/drivers/kvm/svm.c
===================================================================
--- /dev/null
+++ linux-2.6/drivers/kvm/svm.c
@@ -0,0 +1,1622 @@
+/*
+ * Kernel-based Virtual Machine driver for Linux
+ *
+ * AMD SVM support
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ *
+ * Authors:
+ * Yaniv Kamay <yaniv@...ranet.com>
+ * Avi Kivity <avi@...ranet.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <asm/desc.h>
+
+#include "kvm_svm.h"
+#include "x86_emulate.h"
+
+MODULE_AUTHOR("Qumranet");
+MODULE_LICENSE("GPL");
+
+#define IOPM_ALLOC_ORDER 2
+#define MSRPM_ALLOC_ORDER 1
+
+#define DB_VECTOR 1
+#define UD_VECTOR 6
+#define GP_VECTOR 13
+
+#define DR7_GD_MASK (1 << 13)
+#define DR6_BD_MASK (1 << 13)
+#define CR4_DE_MASK (1UL << 3)
+
+#define SEG_TYPE_LDT 2
+#define SEG_TYPE_BUSY_TSS16 3
+
+unsigned long iopm_base;
+unsigned long msrpm_base;
+
+struct svm_cpu_data {
+ int cpu;
+
+ uint64_t asid_generation;
+ uint32_t max_asid;
+ uint32_t next_asid;
+ struct ldttss_desc *tss_desc;
+
+ struct page *save_area;
+};
+
+static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
+
+struct svm_init_data {
+ int cpu;
+ int r;
+};
+
+static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
+
+#define NUM_MSR_MAPS (sizeof(msrpm_ranges) / sizeof(*msrpm_ranges))
+#define MSRS_RANGE_SIZE 2048
+#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
+
+#define MAX_INST_SIZE 15
+
+static unsigned get_addr_size(struct kvm_vcpu *vcpu)
+{
+ struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
+ u16 cs_attrib;
+
+ if (!(sa->cr0 & CR0_PE_MASK) || (sa->rflags & X86_EFLAGS_VM))
+ return 2;
+
+ cs_attrib = sa->cs.attrib;
+
+ return (cs_attrib & SVM_SELECTOR_L_MASK) ? 8 :
+ (cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2;
+}
+
+static inline u8 pop_irq(struct kvm_vcpu *vcpu)
+{
+ int word_index = __ffs(vcpu->irq_summary);
+ int bit_index = __ffs(vcpu->irq_pending[word_index]);
+ int irq = word_index * BITS_PER_LONG + bit_index;
+
+ clear_bit(bit_index, &vcpu->irq_pending[word_index]);
+ if (!vcpu->irq_pending[word_index])
+ clear_bit(word_index, &vcpu->irq_summary);
+ return irq;
+}
+
+static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
+{
+ set_bit(irq, vcpu->irq_pending);
+ set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
+}
+
+static inline void clgi(void)
+{
+ asm volatile ("clgi");
+}
+
+static inline void stgi(void)
+{
+ asm volatile ("stgi");
+}
+
+static inline void invlpga(unsigned long addr, u32 asid)
+{
+ asm volatile ("invlpga" :: "a"(addr), "c"(asid));
+}
+
+static inline unsigned long read_cr2(void)
+{
+ unsigned long cr2;
+
+ asm volatile ("mov %%cr2, %0" : "=r" (cr2));
+ return cr2;
+}
+
+static inline void write_cr2(unsigned long val)
+{
+ asm volatile ("mov %0, %%cr2" :: "r" (val));
+}
+
+static inline unsigned long read_dr6(void)
+{
+ unsigned long dr6;
+
+ asm volatile ("mov %%dr6, %0" : "=r" (dr6));
+ return dr6;
+}
+
+static inline void write_dr6(unsigned long val)
+{
+ asm volatile ("mov %0, %%dr6" :: "r" (val));
+}
+
+static inline unsigned long read_dr7(void)
+{
+ unsigned long dr7;
+
+ asm volatile ("mov %%dr7, %0" : "=r" (dr7));
+ return dr7;
+}
+
+static inline void write_dr7(unsigned long val)
+{
+ asm volatile ("mov %0, %%dr7" :: "r" (val));
+}
+
+static inline int svm_is_long_mode(struct kvm_vcpu *vcpu)
+{
+ return vcpu->svm->vmcb->save.efer & EFER_LMA;
+}
+
+static inline void force_new_asid(struct kvm_vcpu *vcpu)
+{
+ vcpu->svm->asid_generation--;
+}
+
+static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
+{
+ force_new_asid(vcpu);
+}
+
+static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
+{
+ if (!(efer & EFER_LMA))
+ efer &= ~EFER_LME;
+
+ vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
+ vcpu->shadow_efer = efer;
+}
+
+static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
+{
+ vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
+ SVM_EVTINJ_VALID_ERR |
+ SVM_EVTINJ_TYPE_EXEPT |
+ GP_VECTOR;
+ vcpu->svm->vmcb->control.event_inj_err = error_code;
+}
+
+static void inject_ud(struct kvm_vcpu *vcpu)
+{
+ vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
+ SVM_EVTINJ_TYPE_EXEPT |
+ UD_VECTOR;
+}
+
+static void inject_db(struct kvm_vcpu *vcpu)
+{
+ vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
+ SVM_EVTINJ_TYPE_EXEPT |
+ DB_VECTOR;
+}
+
+static int is_page_fault(uint32_t info)
+{
+ info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
+ return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
+}
+
+static int is_external_interrupt(u32 info)
+{
+ info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
+ return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
+}
+
+static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
+{
+ if (!vcpu->svm->next_rip) {
+ printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
+ return;
+ }
+ if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) {
+ printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
+ __FUNCTION__,
+ vcpu->svm->vmcb->save.rip,
+ vcpu->svm->next_rip);
+ }
+
+ vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip;
+ vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
+}
+
+static int has_svm(void)
+{
+ uint32_t eax, ebx, ecx, edx;
+
+ if (current_cpu_data.x86_vendor != X86_VENDOR_AMD) {
+ printk(KERN_INFO "has_svm: not amd\n");
+ return 0;
+ }
+
+ cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
+ if (eax < SVM_CPUID_FUNC) {
+ printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
+ return 0;
+ }
+
+ cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
+ if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
+ printk(KERN_DEBUG "has_svm: svm not available\n");
+ return 0;
+ }
+ return 1;
+}
+
+static void svm_hardware_disable(void *garbage)
+{
+ struct svm_cpu_data *svm_data
+ = per_cpu(svm_data, raw_smp_processor_id());
+
+ if (svm_data) {
+ uint64_t efer;
+
+ wrmsrl(MSR_VM_HSAVE_PA, 0);
+ rdmsrl(MSR_EFER, efer);
+ wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
+ per_cpu(svm_data, raw_smp_processor_id()) = 0;
+ __free_page(svm_data->save_area);
+ kfree(svm_data);
+ }
+}
+
+static void svm_hardware_enable(void *garbage)
+{
+
+ struct svm_cpu_data *svm_data;
+ uint64_t efer;
+ struct desc_ptr gdt_descr;
+ struct desc_struct *gdt;
+ int me = raw_smp_processor_id();
+
+ if (!has_svm()) {
+ printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
+ return;
+ }
+ svm_data = per_cpu(svm_data, me);
+
+ if (!svm_data) {
+ printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
+ me);
+ return;
+ }
+
+ svm_data->asid_generation = 1;
+ svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
+ svm_data->next_asid = svm_data->max_asid + 1;
+
+ asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
+ gdt = (struct desc_struct *)gdt_descr.address;
+ svm_data->tss_desc = (struct ldttss_desc *)(gdt + GDT_ENTRY_TSS);
+
+ rdmsrl(MSR_EFER, efer);
+ wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
+
+ wrmsrl(MSR_VM_HSAVE_PA,
+ page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
+}
+
+static int svm_cpu_init(int cpu)
+{
+ struct svm_cpu_data *svm_data;
+ int r;
+
+ svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
+ if (!svm_data)
+ return -ENOMEM;
+ svm_data->cpu = cpu;
+ svm_data->save_area = alloc_page(GFP_KERNEL);
+ r = -ENOMEM;
+ if (!svm_data->save_area)
+ goto err_1;
+
+ per_cpu(svm_data, cpu) = svm_data;
+
+ return 0;
+
+err_1:
+ kfree(svm_data);
+ return r;
+
+}
+
+static int set_msr_interception(u32 *msrpm, unsigned msr,
+ int read, int write)
+{
+ int i;
+
+ for (i = 0; i < NUM_MSR_MAPS; i++) {
+ if (msr >= msrpm_ranges[i] &&
+ msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
+ u32 msr_offset = (i * MSRS_IN_RANGE + msr -
+ msrpm_ranges[i]) * 2;
+
+ u32 *base = msrpm + (msr_offset / 32);
+ u32 msr_shift = msr_offset % 32;
+ u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
+ *base = (*base & ~(0x3 << msr_shift)) |
+ (mask << msr_shift);
+ return 1;
+ }
+ }
+ printk(KERN_DEBUG "%s: not found 0x%x\n", __FUNCTION__, msr);
+ return 0;
+}
+
+static __init int svm_hardware_setup(void)
+{
+ int cpu;
+ struct page *iopm_pages;
+ struct page *msrpm_pages;
+ void *msrpm_va;
+ int r;
+
+
+ iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
+
+ if (!iopm_pages)
+ return -ENOMEM;
+ memset(page_address(iopm_pages), 0xff,
+ PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
+ iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
+
+
+ msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
+
+ r = -ENOMEM;
+ if (!msrpm_pages)
+ goto err_1;
+
+ msrpm_va = page_address(msrpm_pages);
+ memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
+ msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
+
+ set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
+ set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
+ set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
+ set_msr_interception(msrpm_va, MSR_STAR, 1, 1);
+ set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
+ set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
+ set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
+ set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
+ set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
+ set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
+
+ for_each_online_cpu(cpu) {
+ r = svm_cpu_init(cpu);
+ if (r)
+ goto err_2;
+ }
+ return 0;
+
+err_2:
+ __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
+ msrpm_base = 0;
+err_1:
+ __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
+ iopm_base = 0;
+ return r;
+}
+
+static __exit void svm_hardware_unsetup(void)
+{
+ __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
+ __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
+ iopm_base = msrpm_base = 0;
+}
+
+static void init_seg(struct vmcb_seg *seg)
+{
+ seg->selector = 0;
+ seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
+ SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
+ seg->limit = 0xffff;
+ seg->base = 0;
+}
+
+static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
+{
+ seg->selector = 0;
+ seg->attrib = SVM_SELECTOR_P_MASK | type;
+ seg->limit = 0xffff;
+ seg->base = 0;
+}
+
+static int svm_vcpu_setup(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+
+static void init_vmcb(struct vmcb *vmcb)
+{
+ struct vmcb_control_area *control = &vmcb->control;
+ struct vmcb_save_area *save = &vmcb->save;
+ u64 tsc;
+
+ control->intercept_cr_read = INTERCEPT_CR0_MASK |
+ INTERCEPT_CR3_MASK |
+ INTERCEPT_CR4_MASK;
+
+ control->intercept_cr_write = INTERCEPT_CR0_MASK |
+ INTERCEPT_CR3_MASK |
+ INTERCEPT_CR4_MASK;
+
+ control->intercept_dr_read = INTERCEPT_DR0_MASK |
+ INTERCEPT_DR1_MASK |
+ INTERCEPT_DR2_MASK |
+ INTERCEPT_DR3_MASK;
+
+ control->intercept_dr_write = INTERCEPT_DR0_MASK |
+ INTERCEPT_DR1_MASK |
+ INTERCEPT_DR2_MASK |
+ INTERCEPT_DR3_MASK |
+ INTERCEPT_DR5_MASK |
+ INTERCEPT_DR7_MASK;
+
+ control->intercept_exceptions = 1 << PF_VECTOR;
+
+
+ control->intercept = (1ULL << INTERCEPT_INTR) |
+ (1ULL << INTERCEPT_NMI) |
+ /*
+ * selective cr0 intercept bug?
+ * 0: 0f 22 d8 mov %eax,%cr3
+ * 3: 0f 20 c0 mov %cr0,%eax
+ * 6: 0d 00 00 00 80 or $0x80000000,%eax
+ * b: 0f 22 c0 mov %eax,%cr0
+ * set cr3 ->interception
+ * get cr0 ->interception
+ * set cr0 -> no interception
+ */
+ /* (1ULL << INTERCEPT_SELECTIVE_CR0) | */
+ (1ULL << INTERCEPT_CPUID) |
+ (1ULL << INTERCEPT_HLT) |
+ (1ULL << INTERCEPT_INVLPG) |
+ (1ULL << INTERCEPT_INVLPGA) |
+ (1ULL << INTERCEPT_IOIO_PROT) |
+ (1ULL << INTERCEPT_MSR_PROT) |
+ (1ULL << INTERCEPT_TASK_SWITCH) |
+ (1ULL << INTERCEPT_VMRUN) |
+ (1ULL << INTERCEPT_VMMCALL) |
+ (1ULL << INTERCEPT_VMLOAD) |
+ (1ULL << INTERCEPT_VMSAVE) |
+ (1ULL << INTERCEPT_STGI) |
+ (1ULL << INTERCEPT_CLGI) |
+ (1ULL << INTERCEPT_SKINIT);
+
+ control->iopm_base_pa = iopm_base;
+ control->msrpm_base_pa = msrpm_base;
+ rdtscll(tsc);
+ control->tsc_offset = -tsc;
+ control->int_ctl = V_INTR_MASKING_MASK;
+
+ init_seg(&save->es);
+ init_seg(&save->ss);
+ init_seg(&save->ds);
+ init_seg(&save->fs);
+ init_seg(&save->gs);
+
+ save->cs.selector = 0xf000;
+ /* Executable/Readable Code Segment */
+ save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
+ SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
+ save->cs.limit = 0xffff;
+ save->cs.base = 0xffff0000;
+
+ save->gdtr.limit = 0xffff;
+ save->idtr.limit = 0xffff;
+
+ init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
+ init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
+
+ save->efer = MSR_EFER_SVME_MASK;
+
+ save->dr6 = 0xffff0ff0;
+ save->dr7 = 0x400;
+ save->rflags = 2;
+ save->rip = 0x0000fff0;
+
+ /*
+ * cr0 val on cpu init should be 0x60000010, we enable cpu
+ * cache by default. the orderly way is to enable cache in bios.
+ */
+ save->cr0 = 0x00000010 | CR0_PG_MASK;
+ save->cr4 = CR4_PAE_MASK;
+ /* rdx = ?? */
+}
+
+static int svm_create_vcpu(struct kvm_vcpu *vcpu)
+{
+ struct page *page;
+ int r;
+
+ r = -ENOMEM;
+ vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL);
+ if (!vcpu->svm)
+ goto out1;
+ page = alloc_page(GFP_KERNEL);
+ if (!page)
+ goto out2;
+
+ vcpu->svm->vmcb = page_address(page);
+ memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
+ vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
+ vcpu->svm->cr0 = 0x00000010;
+ vcpu->svm->asid_generation = 0;
+ memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
+ init_vmcb(vcpu->svm->vmcb);
+
+ return 0;
+
+out2:
+ kfree(vcpu->svm);
+out1:
+ return r;
+}
+
+static void svm_free_vcpu(struct kvm_vcpu *vcpu)
+{
+ if (!vcpu->svm)
+ return;
+ if (vcpu->svm->vmcb)
+ __free_page(pfn_to_page(vcpu->svm->vmcb_pa >> PAGE_SHIFT));
+ kfree(vcpu->svm);
+}
+
+static struct kvm_vcpu *svm_vcpu_load(struct kvm_vcpu *vcpu)
+{
+ get_cpu();
+ return vcpu;
+}
+
+static void svm_vcpu_put(struct kvm_vcpu *vcpu)
+{
+ put_cpu();
+}
+
+static void svm_cache_regs(struct kvm_vcpu *vcpu)
+{
+ vcpu->regs[VCPU_REGS_RAX] = vcpu->svm->vmcb->save.rax;
+ vcpu->regs[VCPU_REGS_RSP] = vcpu->svm->vmcb->save.rsp;
+ vcpu->rip = vcpu->svm->vmcb->save.rip;
+}
+
+static void svm_decache_regs(struct kvm_vcpu *vcpu)
+{
+ vcpu->svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
+ vcpu->svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
+ vcpu->svm->vmcb->save.rip = vcpu->rip;
+}
+
+static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
+{
+ return vcpu->svm->vmcb->save.rflags;
+}
+
+static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
+{
+ vcpu->svm->vmcb->save.rflags = rflags;
+}
+
+static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
+{
+ struct vmcb_save_area *save = &vcpu->svm->vmcb->save;
+
+ switch (seg) {
+ case VCPU_SREG_CS: return &save->cs;
+ case VCPU_SREG_DS: return &save->ds;
+ case VCPU_SREG_ES: return &save->es;
+ case VCPU_SREG_FS: return &save->fs;
+ case VCPU_SREG_GS: return &save->gs;
+ case VCPU_SREG_SS: return &save->ss;
+ case VCPU_SREG_TR: return &save->tr;
+ case VCPU_SREG_LDTR: return &save->ldtr;
+ }
+ BUG();
+ return 0;
+}
+
+static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
+{
+ struct vmcb_seg *s = svm_seg(vcpu, seg);
+
+ return s->base;
+}
+
+static void svm_get_segment(struct kvm_vcpu *vcpu,
+ struct kvm_segment *var, int seg)
+{
+ struct vmcb_seg *s = svm_seg(vcpu, seg);
+
+ var->base = s->base;
+ var->limit = s->limit;
+ var->selector = s->selector;
+ var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
+ var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
+ var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
+ var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
+ var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
+ var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
+ var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
+ var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
+ var->unusable = !var->present;
+}
+
+static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
+{
+ struct vmcb_seg *s = svm_seg(vcpu, VCPU_SREG_CS);
+
+ *db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
+ *l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
+}
+
+static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
+{
+ dt->limit = vcpu->svm->vmcb->save.ldtr.limit;
+ dt->base = vcpu->svm->vmcb->save.ldtr.base;
+}
+
+static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
+{
+ vcpu->svm->vmcb->save.ldtr.limit = dt->limit;
+ vcpu->svm->vmcb->save.ldtr.base = dt->base ;
+}
+
+static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
+{
+ dt->limit = vcpu->svm->vmcb->save.gdtr.limit;
+ dt->base = vcpu->svm->vmcb->save.gdtr.base;
+}
+
+static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
+{
+ vcpu->svm->vmcb->save.gdtr.limit = dt->limit;
+ vcpu->svm->vmcb->save.gdtr.base = dt->base ;
+}
+
+static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
+{
+#ifdef __x86_64__
+ if (vcpu->shadow_efer & EFER_LME) {
+ if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) {
+ vcpu->shadow_efer |= EFER_LMA;
+ vcpu->svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
+ }
+
+ if (is_paging(vcpu) && !(cr0 & CR0_PG_MASK) ) {
+ vcpu->shadow_efer &= ~EFER_LMA;
+ vcpu->svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
+ }
+ }
+#endif
+ vcpu->svm->cr0 = cr0;
+ vcpu->svm->vmcb->save.cr0 = cr0 | CR0_PG_MASK;
+ vcpu->cr0 = cr0;
+}
+
+static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
+{
+ vcpu->cr4 = cr4;
+ vcpu->svm->vmcb->save.cr4 = cr4 | CR4_PAE_MASK;
+}
+
+static void svm_set_segment(struct kvm_vcpu *vcpu,
+ struct kvm_segment *var, int seg)
+{
+ struct vmcb_seg *s = svm_seg(vcpu, seg);
+
+ s->base = var->base;
+ s->limit = var->limit;
+ s->selector = var->selector;
+ if (var->unusable)
+ s->attrib = 0;
+ else {
+ s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
+ s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
+ s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
+ s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
+ s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
+ s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
+ s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
+ s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
+ }
+ if (seg == VCPU_SREG_CS)
+ vcpu->svm->vmcb->save.cpl
+ = (vcpu->svm->vmcb->save.cs.attrib
+ >> SVM_SELECTOR_DPL_SHIFT) & 3;
+
+}
+
+/* FIXME:
+
+ vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
+ vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
+
+*/
+
+static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
+{
+ return -EOPNOTSUPP;
+}
+
+static void load_host_msrs(struct kvm_vcpu *vcpu)
+{
+ int i;
+
+ for ( i = 0; i < NR_HOST_SAVE_MSRS; i++)
+ wrmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]);
+}
+
+static void save_host_msrs(struct kvm_vcpu *vcpu)
+{
+ int i;
+
+ for ( i = 0; i < NR_HOST_SAVE_MSRS; i++)
+ rdmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]);
+}
+
+static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data)
+{
+ if (svm_data->next_asid > svm_data->max_asid) {
+ ++svm_data->asid_generation;
+ svm_data->next_asid = 1;
+ vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
+ }
+
+ vcpu->cpu = svm_data->cpu;
+ vcpu->svm->asid_generation = svm_data->asid_generation;
+ vcpu->svm->vmcb->control.asid = svm_data->next_asid++;
+}
+
+static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address)
+{
+ invlpga(address, vcpu->svm->vmcb->control.asid); // is needed?
+}
+
+static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
+{
+ return vcpu->svm->db_regs[dr];
+}
+
+static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
+ int *exception)
+{
+ *exception = 0;
+
+ if (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) {
+ vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
+ vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK;
+ *exception = DB_VECTOR;
+ return;
+ }
+
+ switch (dr) {
+ case 0 ... 3:
+ vcpu->svm->db_regs[dr] = value;
+ return;
+ case 4 ... 5:
+ if (vcpu->cr4 & CR4_DE_MASK) {
+ *exception = UD_VECTOR;
+ return;
+ }
+ case 7: {
+ if (value & ~((1ULL << 32) - 1)) {
+ *exception = GP_VECTOR;
+ return;
+ }
+ vcpu->svm->vmcb->save.dr7 = value;
+ return;
+ }
+ default:
+ printk(KERN_DEBUG "%s: unexpected dr %u\n",
+ __FUNCTION__, dr);
+ *exception = UD_VECTOR;
+ return;
+ }
+}
+
+static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
+ u64 fault_address;
+ u32 error_code;
+ enum emulation_result er;
+
+ if (is_external_interrupt(exit_int_info))
+ push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
+
+ spin_lock(&vcpu->kvm->lock);
+
+ fault_address = vcpu->svm->vmcb->control.exit_info_2;
+ error_code = vcpu->svm->vmcb->control.exit_info_1;
+ if (!vcpu->mmu.page_fault(vcpu, fault_address, error_code)) {
+ spin_unlock(&vcpu->kvm->lock);
+ return 1;
+ }
+ er = emulate_instruction(vcpu, kvm_run, fault_address, error_code);
+ spin_unlock(&vcpu->kvm->lock);
+
+ switch (er) {
+ case EMULATE_DONE:
+ return 1;
+ case EMULATE_DO_MMIO:
+ ++kvm_stat.mmio_exits;
+ kvm_run->exit_reason = KVM_EXIT_MMIO;
+ return 0;
+ case EMULATE_FAIL:
+ vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
+ break;
+ default:
+ BUG();
+ }
+
+ kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+ return 0;
+}
+
+static int io_get_override(struct kvm_vcpu *vcpu,
+ struct vmcb_seg **seg,
+ int *addr_override)
+{
+ u8 inst[MAX_INST_SIZE];
+ unsigned ins_length;
+ gva_t rip;
+ int i;
+
+ rip = vcpu->svm->vmcb->save.rip;
+ ins_length = vcpu->svm->next_rip - rip;
+ rip += vcpu->svm->vmcb->save.cs.base;
+
+ if (ins_length > MAX_INST_SIZE)
+ printk(KERN_DEBUG
+ "%s: inst length err, cs base 0x%llx rip 0x%llx "
+ "next rip 0x%llx ins_length %u\n",
+ __FUNCTION__,
+ vcpu->svm->vmcb->save.cs.base,
+ vcpu->svm->vmcb->save.rip,
+ vcpu->svm->vmcb->control.exit_info_2,
+ ins_length);
+
+ if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length)
+ /* #PF */
+ return 0;
+
+ *addr_override = 0;
+ *seg = 0;
+ for (i = 0; i < ins_length; i++)
+ switch (inst[i]) {
+ case 0xf0:
+ case 0xf2:
+ case 0xf3:
+ case 0x66:
+ continue;
+ case 0x67:
+ *addr_override = 1;
+ continue;
+ case 0x2e:
+ *seg = &vcpu->svm->vmcb->save.cs;
+ continue;
+ case 0x36:
+ *seg = &vcpu->svm->vmcb->save.ss;
+ continue;
+ case 0x3e:
+ *seg = &vcpu->svm->vmcb->save.ds;
+ continue;
+ case 0x26:
+ *seg = &vcpu->svm->vmcb->save.es;
+ continue;
+ case 0x64:
+ *seg = &vcpu->svm->vmcb->save.fs;
+ continue;
+ case 0x65:
+ *seg = &vcpu->svm->vmcb->save.gs;
+ continue;
+ default:
+ return 1;
+ }
+ printk(KERN_DEBUG "%s: unexpected\n", __FUNCTION__);
+ return 0;
+}
+
+static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, u64 *address)
+{
+ unsigned long addr_mask;
+ unsigned long *reg;
+ struct vmcb_seg *seg;
+ int addr_override;
+ struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save;
+ u16 cs_attrib = save_area->cs.attrib;
+ unsigned addr_size = get_addr_size(vcpu);
+
+ if (!io_get_override(vcpu, &seg, &addr_override))
+ return 0;
+
+ if (addr_override)
+ addr_size = (addr_size == 2) ? 4: (addr_size >> 1);
+
+ if (ins) {
+ reg = &vcpu->regs[VCPU_REGS_RDI];
+ seg = &vcpu->svm->vmcb->save.es;
+ } else {
+ reg = &vcpu->regs[VCPU_REGS_RSI];
+ seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds;
+ }
+
+ addr_mask = ~0ULL >> (64 - (addr_size * 8));
+
+ if ((cs_attrib & SVM_SELECTOR_L_MASK) &&
+ !(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
+ *address = (*reg & addr_mask);
+ return addr_mask;
+ }
+
+ if (!(seg->attrib & SVM_SELECTOR_P_SHIFT)) {
+ svm_inject_gp(vcpu, 0);
+ return 0;
+ }
+
+ *address = (*reg & addr_mask) + seg->base;
+ return addr_mask;
+}
+
+static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug?
+ int _in = io_info & SVM_IOIO_TYPE_MASK;
+
+ ++kvm_stat.io_exits;
+
+ vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2;
+
+ kvm_run->exit_reason = KVM_EXIT_IO;
+ kvm_run->io.port = io_info >> 16;
+ kvm_run->io.direction = (_in) ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
+ kvm_run->io.size = ((io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT);
+ kvm_run->io.string = (io_info & SVM_IOIO_STR_MASK) != 0;
+ kvm_run->io.rep = (io_info & SVM_IOIO_REP_MASK) != 0;
+
+ if (kvm_run->io.string) {
+ unsigned addr_mask;
+
+ addr_mask = io_adress(vcpu, _in, &kvm_run->io.address);
+ if (!addr_mask) {
+ printk("%s: get io address failed\n", __FUNCTION__);
+ return 1;
+ }
+
+ if (kvm_run->io.rep) {
+ kvm_run->io.count = vcpu->regs[VCPU_REGS_RCX] & addr_mask;
+ kvm_run->io.string_down = (vcpu->svm->vmcb->save.rflags
+ & X86_EFLAGS_DF) != 0;
+ }
+ } else {
+ kvm_run->io.value = vcpu->svm->vmcb->save.rax;
+ }
+ return 0;
+}
+
+
+static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ return 1;
+}
+
+static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
+ skip_emulated_instruction(vcpu);
+ if (vcpu->irq_summary && (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF))
+ return 1;
+
+ kvm_run->exit_reason = KVM_EXIT_HLT;
+ return 0;
+}
+
+static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ inject_ud(vcpu);
+ return 1;
+}
+
+static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ printk("%s: task swiche is unsupported\n", __FUNCTION__);
+ kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+ return 0;
+}
+
+static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
+ kvm_run->exit_reason = KVM_EXIT_CPUID;
+ return 0;
+}
+
+static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ if (emulate_instruction(vcpu, 0, 0, 0) != EMULATE_DONE)
+ printk(KERN_ERR "%s: failed\n", __FUNCTION__);
+ return 1;
+}
+
+static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
+{
+ switch (ecx) {
+ case MSR_IA32_MC0_CTL:
+ case MSR_IA32_MCG_STATUS:
+ case MSR_IA32_MCG_CAP:
+ case MSR_IA32_MC0_MISC:
+ case MSR_IA32_MC0_MISC+4:
+ case MSR_IA32_MC0_MISC+8:
+ case MSR_IA32_MC0_MISC+12:
+ case MSR_IA32_MC0_MISC+16:
+ case MSR_IA32_UCODE_REV:
+ /* MTRR registers */
+ case 0xfe:
+ case 0x200 ... 0x2ff:
+ *data = 0;
+ break;
+ case MSR_IA32_TIME_STAMP_COUNTER: {
+ u64 tsc;
+
+ rdtscll(tsc);
+ *data = vcpu->svm->vmcb->control.tsc_offset + tsc;
+ break;
+ }
+ case MSR_EFER:
+ *data = vcpu->shadow_efer;
+ break;
+ case MSR_IA32_APICBASE:
+ *data = vcpu->apic_base;
+ break;
+ case MSR_STAR:
+ *data = vcpu->svm->vmcb->save.star;
+ break;
+ case MSR_LSTAR:
+ *data = vcpu->svm->vmcb->save.lstar;
+ break;
+ case MSR_CSTAR:
+ *data = vcpu->svm->vmcb->save.cstar;
+ break;
+ case MSR_IA32_SYSENTER_CS:
+ *data = vcpu->svm->vmcb->save.sysenter_cs;
+ break;
+ case MSR_IA32_SYSENTER_EIP:
+ *data = vcpu->svm->vmcb->save.sysenter_eip;
+ break;
+ case MSR_IA32_SYSENTER_ESP:
+ *data = vcpu->svm->vmcb->save.sysenter_esp;
+ break;
+ case MSR_KERNEL_GS_BASE:
+ *data = vcpu->svm->vmcb->save.kernel_gs_base;
+ break;
+ case MSR_SYSCALL_MASK:
+ *data = vcpu->svm->vmcb->save.sfmask;
+ break;
+ default:
+ printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", ecx);
+ return 1;
+ }
+ return 0;
+}
+
+static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ u32 ecx = vcpu->regs[VCPU_REGS_RCX];
+ u64 data;
+
+ if (svm_get_msr(vcpu, ecx, &data))
+ svm_inject_gp(vcpu, 0);
+ else {
+ vcpu->svm->vmcb->save.rax = data & 0xffffffff;
+ vcpu->regs[VCPU_REGS_RDX] = data >> 32;
+ vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
+ skip_emulated_instruction(vcpu);
+ }
+ return 1;
+}
+
+static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
+{
+ switch (ecx) {
+ case MSR_EFER:
+ set_efer(vcpu, data);
+ break;
+ case MSR_IA32_MC0_STATUS:
+ printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n"
+ , __FUNCTION__, data);
+ break;
+ case MSR_IA32_TIME_STAMP_COUNTER: {
+ u64 tsc;
+
+ rdtscll(tsc);
+ vcpu->svm->vmcb->control.tsc_offset = data - tsc;
+ break;
+ }
+ case MSR_IA32_UCODE_REV:
+ case MSR_IA32_UCODE_WRITE:
+ case 0x200 ... 0x2ff: /* MTRRs */
+ break;
+ case MSR_IA32_APICBASE:
+ vcpu->apic_base = data;
+ break;
+ case MSR_STAR:
+ vcpu->svm->vmcb->save.star = data;
+ break;
+ case MSR_LSTAR:
+ vcpu->svm->vmcb->save.lstar = data;
+ break;
+ case MSR_CSTAR:
+ vcpu->svm->vmcb->save.cstar = data;
+ break;
+ case MSR_IA32_SYSENTER_CS:
+ vcpu->svm->vmcb->save.sysenter_cs = data;
+ break;
+ case MSR_IA32_SYSENTER_EIP:
+ vcpu->svm->vmcb->save.sysenter_eip = data;
+ break;
+ case MSR_IA32_SYSENTER_ESP:
+ vcpu->svm->vmcb->save.sysenter_esp = data;
+ break;
+ case MSR_KERNEL_GS_BASE:
+ vcpu->svm->vmcb->save.kernel_gs_base = data;
+ break;
+ case MSR_SYSCALL_MASK:
+ vcpu->svm->vmcb->save.sfmask = data;
+ break;
+ default:
+ printk(KERN_ERR "kvm: unhandled wrmsr: %x\n", ecx);
+ return 1;
+ }
+ return 0;
+}
+
+static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ u32 ecx = vcpu->regs[VCPU_REGS_RCX];
+ u64 data = (vcpu->svm->vmcb->save.rax & -1u)
+ | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
+ vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
+ if (svm_set_msr(vcpu, ecx, data))
+ svm_inject_gp(vcpu, 0);
+ else
+ skip_emulated_instruction(vcpu);
+ return 1;
+}
+
+static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ if (vcpu->svm->vmcb->control.exit_info_1)
+ return wrmsr_interception(vcpu, kvm_run);
+ else
+ return rdmsr_interception(vcpu, kvm_run);
+}
+
+static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
+ struct kvm_run *kvm_run) = {
+ [SVM_EXIT_READ_CR0] = emulate_on_interception,
+ [SVM_EXIT_READ_CR3] = emulate_on_interception,
+ [SVM_EXIT_READ_CR4] = emulate_on_interception,
+ /* for now: */
+ [SVM_EXIT_WRITE_CR0] = emulate_on_interception,
+ [SVM_EXIT_WRITE_CR3] = emulate_on_interception,
+ [SVM_EXIT_WRITE_CR4] = emulate_on_interception,
+ [SVM_EXIT_READ_DR0] = emulate_on_interception,
+ [SVM_EXIT_READ_DR1] = emulate_on_interception,
+ [SVM_EXIT_READ_DR2] = emulate_on_interception,
+ [SVM_EXIT_READ_DR3] = emulate_on_interception,
+ [SVM_EXIT_WRITE_DR0] = emulate_on_interception,
+ [SVM_EXIT_WRITE_DR1] = emulate_on_interception,
+ [SVM_EXIT_WRITE_DR2] = emulate_on_interception,
+ [SVM_EXIT_WRITE_DR3] = emulate_on_interception,
+ [SVM_EXIT_WRITE_DR5] = emulate_on_interception,
+ [SVM_EXIT_WRITE_DR7] = emulate_on_interception,
+ [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
+ [SVM_EXIT_INTR] = nop_on_interception,
+ [SVM_EXIT_NMI] = nop_on_interception,
+ [SVM_EXIT_SMI] = nop_on_interception,
+ [SVM_EXIT_INIT] = nop_on_interception,
+ /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */
+ [SVM_EXIT_CPUID] = cpuid_interception,
+ [SVM_EXIT_HLT] = halt_interception,
+ [SVM_EXIT_INVLPG] = emulate_on_interception,
+ [SVM_EXIT_INVLPGA] = invalid_op_interception,
+ [SVM_EXIT_IOIO] = io_interception,
+ [SVM_EXIT_MSR] = msr_interception,
+ [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
+ [SVM_EXIT_VMRUN] = invalid_op_interception,
+ [SVM_EXIT_VMMCALL] = invalid_op_interception,
+ [SVM_EXIT_VMLOAD] = invalid_op_interception,
+ [SVM_EXIT_VMSAVE] = invalid_op_interception,
+ [SVM_EXIT_STGI] = invalid_op_interception,
+ [SVM_EXIT_CLGI] = invalid_op_interception,
+ [SVM_EXIT_SKINIT] = invalid_op_interception,
+};
+
+
+static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ u32 exit_code = vcpu->svm->vmcb->control.exit_code;
+
+ kvm_run->exit_type = KVM_EXIT_TYPE_VM_EXIT;
+
+ if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
+ exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
+ printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
+ "exit_code 0x%x\n",
+ __FUNCTION__, vcpu->svm->vmcb->control.exit_int_info,
+ exit_code);
+
+ if (exit_code >= sizeof(svm_exit_handlers) / sizeof(*svm_exit_handlers)
+ || svm_exit_handlers[exit_code] == 0) {
+ kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
+ printk(KERN_ERR "%s: 0x%x @ 0x%llx cr0 0x%lx rflags 0x%llx\n",
+ __FUNCTION__,
+ exit_code,
+ vcpu->svm->vmcb->save.rip,
+ vcpu->cr0,
+ vcpu->svm->vmcb->save.rflags);
+ return 0;
+ }
+
+ return svm_exit_handlers[exit_code](vcpu, kvm_run);
+}
+
+static void reload_tss(struct kvm_vcpu *vcpu)
+{
+ int cpu = raw_smp_processor_id();
+
+ struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
+ svm_data->tss_desc->type = 9; //available 32/64-bit TSS
+ load_TR_desc();
+}
+
+static void pre_svm_run(struct kvm_vcpu *vcpu)
+{
+ int cpu = raw_smp_processor_id();
+
+ struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
+
+ vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
+ if (vcpu->cpu != cpu ||
+ vcpu->svm->asid_generation != svm_data->asid_generation)
+ new_asid(vcpu, svm_data);
+}
+
+
+static inline void kvm_try_inject_irq(struct kvm_vcpu *vcpu)
+{
+ struct vmcb_control_area *control;
+
+ if (!vcpu->irq_summary)
+ return;
+
+ control = &vcpu->svm->vmcb->control;
+
+ control->int_vector = pop_irq(vcpu);
+ control->int_ctl &= ~V_INTR_PRIO_MASK;
+ control->int_ctl |= V_IRQ_MASK |
+ ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
+}
+
+static void kvm_reput_irq(struct kvm_vcpu *vcpu)
+{
+ struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
+
+ if (control->int_ctl & V_IRQ_MASK) {
+ control->int_ctl &= ~V_IRQ_MASK;
+ push_irq(vcpu, control->int_vector);
+ }
+}
+
+static void save_db_regs(unsigned long *db_regs)
+{
+ asm ("mov %%dr0, %%rax \n\t"
+ "mov %%rax, %[dr0] \n\t"
+ "mov %%dr1, %%rax \n\t"
+ "mov %%rax, %[dr1] \n\t"
+ "mov %%dr2, %%rax \n\t"
+ "mov %%rax, %[dr2] \n\t"
+ "mov %%dr3, %%rax \n\t"
+ "mov %%rax, %[dr3] \n\t"
+ : [dr0] "=m"(db_regs[0]),
+ [dr1] "=m"(db_regs[1]),
+ [dr2] "=m"(db_regs[2]),
+ [dr3] "=m"(db_regs[3])
+ : : "rax");
+}
+
+static void load_db_regs(unsigned long *db_regs)
+{
+ asm volatile ("mov %[dr0], %%dr0 \n\t"
+ "mov %[dr1], %%dr1 \n\t"
+ "mov %[dr2], %%dr2 \n\t"
+ "mov %[dr3], %%dr3 \n\t"
+ :
+ : [dr0] "r"(db_regs[0]),
+ [dr1] "r"(db_regs[1]),
+ [dr2] "r"(db_regs[2]),
+ [dr3] "r"(db_regs[3])
+ : "rax");
+}
+
+static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
+{
+ u16 fs_selector;
+ u16 gs_selector;
+ u16 ldt_selector;
+
+again:
+ kvm_try_inject_irq(vcpu);
+
+ clgi();
+
+ pre_svm_run(vcpu);
+
+ save_host_msrs(vcpu);
+ fs_selector = read_fs();
+ gs_selector = read_gs();
+ ldt_selector = read_ldt();
+ vcpu->svm->host_cr2 = read_cr2();
+ vcpu->svm->host_dr6 = read_dr6();
+ vcpu->svm->host_dr7 = read_dr7();
+ vcpu->svm->vmcb->save.cr2 = vcpu->cr2;
+
+ if (vcpu->svm->vmcb->save.dr7 & 0xff) {
+ write_dr7(0);
+ save_db_regs(vcpu->svm->host_db_regs);
+ load_db_regs(vcpu->svm->db_regs);
+ }
+ asm volatile (
+#ifdef __x86_64__
+ "push %%rbx; push %%rcx; push %%rdx;"
+ "push %%rsi; push %%rdi; push %%rbp;"
+ "push %%r8; push %%r9; push %%r10; push %%r11;"
+ "push %%r12; push %%r13; push %%r14; push %%r15;"
+#else
+ "push %%ebx; push %%rcx push %%edx;"
+ "push %%esi; push %%edi; push %%ebp;"
+#endif
+
+#ifdef __x86_64__
+ "mov %c[rbx](%[vcpu]), %%rbx \n\t"
+ "mov %c[rcx](%[vcpu]), %%rcx \n\t"
+ "mov %c[rdx](%[vcpu]), %%rdx \n\t"
+ "mov %c[rsi](%[vcpu]), %%rsi \n\t"
+ "mov %c[rdi](%[vcpu]), %%rdi \n\t"
+ "mov %c[rbp](%[vcpu]), %%rbp \n\t"
+ "mov %c[r8](%[vcpu]), %%r8 \n\t"
+ "mov %c[r9](%[vcpu]), %%r9 \n\t"
+ "mov %c[r10](%[vcpu]), %%r10 \n\t"
+ "mov %c[r11](%[vcpu]), %%r11 \n\t"
+ "mov %c[r12](%[vcpu]), %%r12 \n\t"
+ "mov %c[r13](%[vcpu]), %%r13 \n\t"
+ "mov %c[r14](%[vcpu]), %%r14 \n\t"
+ "mov %c[r15](%[vcpu]), %%r15 \n\t"
+#else
+ "mov %c[rbx](%[vcpu]), %%ebx \n\t"
+ "mov %c[rcx](%[vcpu]), %%ecx \n\t"
+ "mov %c[rdx](%[vcpu]), %%edx \n\t"
+ "mov %c[rsi](%[vcpu]), %%esi \n\t"
+ "mov %c[rdi](%[vcpu]), %%edi \n\t"
+ "mov %c[rbp](%[vcpu]), %%ebp \n\t"
+#endif
+
+ /* Enter guest mode */
+ "push %%rax \n\t"
+ "mov %c[svm](%[vcpu]), %%rax \n\t"
+ "mov %c[vmcb](%%rax), %%rax \n\t"
+ SVM_VMLOAD "\n\t"
+ SVM_VMRUN "\n\t"
+ SVM_VMSAVE "\n\t"
+ "pop %%rax \n\t"
+
+ /* Save guest registers, load host registers */
+#ifdef __x86_64__
+ "mov %%rbx, %c[rbx](%[vcpu]) \n\t"
+ "mov %%rcx, %c[rcx](%[vcpu]) \n\t"
+ "mov %%rdx, %c[rdx](%[vcpu]) \n\t"
+ "mov %%rsi, %c[rsi](%[vcpu]) \n\t"
+ "mov %%rdi, %c[rdi](%[vcpu]) \n\t"
+ "mov %%rbp, %c[rbp](%[vcpu]) \n\t"
+ "mov %%r8, %c[r8](%[vcpu]) \n\t"
+ "mov %%r9, %c[r9](%[vcpu]) \n\t"
+ "mov %%r10, %c[r10](%[vcpu]) \n\t"
+ "mov %%r11, %c[r11](%[vcpu]) \n\t"
+ "mov %%r12, %c[r12](%[vcpu]) \n\t"
+ "mov %%r13, %c[r13](%[vcpu]) \n\t"
+ "mov %%r14, %c[r14](%[vcpu]) \n\t"
+ "mov %%r15, %c[r15](%[vcpu]) \n\t"
+
+ "pop %%r15; pop %%r14; pop %%r13; pop %%r12;"
+ "pop %%r11; pop %%r10; pop %%r9; pop %%r8;"
+ "pop %%rbp; pop %%rdi; pop %%rsi;"
+ "pop %%rdx; pop %%rcx; pop %%rbx; \n\t"
+#else
+ "mov %%ebx, %c[rbx](%3) \n\t"
+ "mov %%ecx, %c[rcx](%3) \n\t"
+ "mov %%edx, %c[rdx](%3) \n\t"
+ "mov %%esi, %c[rsi](%3) \n\t"
+ "mov %%edi, %c[rdi](%3) \n\t"
+ "mov %%ebp, %c[rbp](%3) \n\t"
+
+ "pop %%ebp; pop %%edi; pop %%esi;"
+ "pop %%edx; pop %%ecx; pop %%ebx; \n\t"
+#endif
+ :
+ : [vcpu]"a"(vcpu),
+ [svm]"i"(offsetof(struct kvm_vcpu, svm)),
+ [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
+ [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
+ [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
+ [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])),
+ [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])),
+ [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])),
+ [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP])),
+#ifdef __x86_64__
+ [r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])),
+ [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])),
+ [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])),
+ [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])),
+ [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])),
+ [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])),
+ [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])),
+ [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15]))
+#endif
+ : "cc", "memory" );
+
+ if ((vcpu->svm->vmcb->save.dr7 & 0xff))
+ load_db_regs(vcpu->svm->host_db_regs);
+
+ vcpu->cr2 = vcpu->svm->vmcb->save.cr2;
+
+ write_dr6(vcpu->svm->host_dr6);
+ write_dr7(vcpu->svm->host_dr7);
+ write_cr2(vcpu->svm->host_cr2);
+
+ load_fs(fs_selector);
+ load_gs(gs_selector);
+ load_ldt(ldt_selector);
+ load_host_msrs(vcpu);
+
+ reload_tss(vcpu);
+
+ stgi();
+
+ kvm_reput_irq(vcpu);
+
+ vcpu->svm->next_rip = 0;
+
+ if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
+ kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY;
+ kvm_run->exit_reason = vcpu->svm->vmcb->control.exit_code;
+ return 0;
+ }
+
+ if (handle_exit(vcpu, kvm_run)) {
+ if (signal_pending(current)) {
+ ++kvm_stat.signal_exits;
+ return -EINTR;
+ }
+ kvm_resched(vcpu);
+ goto again;
+ }
+ return 0;
+}
+
+static void svm_flush_tlb(struct kvm_vcpu *vcpu)
+{
+ force_new_asid(vcpu);
+}
+
+static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
+{
+ vcpu->svm->vmcb->save.cr3 = root;
+ force_new_asid(vcpu);
+}
+
+static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
+ unsigned long addr,
+ uint32_t err_code)
+{
+ uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
+
+ ++kvm_stat.pf_guest;
+
+ if (is_page_fault(exit_int_info)) {
+
+ vcpu->svm->vmcb->control.event_inj_err = 0;
+ vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
+ SVM_EVTINJ_VALID_ERR |
+ SVM_EVTINJ_TYPE_EXEPT |
+ DF_VECTOR;
+ return;
+ }
+ vcpu->cr2 = addr;
+ vcpu->svm->vmcb->save.cr2 = addr;
+ vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
+ SVM_EVTINJ_VALID_ERR |
+ SVM_EVTINJ_TYPE_EXEPT |
+ PF_VECTOR;
+ vcpu->svm->vmcb->control.event_inj_err = err_code;
+}
+
+
+static int is_disabled(void)
+{
+ return 0;
+}
+
+static struct kvm_arch_ops svm_arch_ops = {
+ .cpu_has_kvm_support = has_svm,
+ .disabled_by_bios = is_disabled,
+ .hardware_setup = svm_hardware_setup,
+ .hardware_unsetup = svm_hardware_unsetup,
+ .hardware_enable = svm_hardware_enable,
+ .hardware_disable = svm_hardware_disable,
+
+ .vcpu_create = svm_create_vcpu,
+ .vcpu_free = svm_free_vcpu,
+
+ .vcpu_load = svm_vcpu_load,
+ .vcpu_put = svm_vcpu_put,
+
+ .set_guest_debug = svm_guest_debug,
+ .get_msr = svm_get_msr,
+ .set_msr = svm_set_msr,
+ .get_segment_base = svm_get_segment_base,
+ .get_segment = svm_get_segment,
+ .set_segment = svm_set_segment,
+ .is_long_mode = svm_is_long_mode,
+ .get_cs_db_l_bits = svm_get_cs_db_l_bits,
+ .set_cr0 = svm_set_cr0,
+ .set_cr0_no_modeswitch = svm_set_cr0,
+ .set_cr3 = svm_set_cr3,
+ .set_cr4 = svm_set_cr4,
+ .set_efer = svm_set_efer,
+ .get_idt = svm_get_idt,
+ .set_idt = svm_set_idt,
+ .get_gdt = svm_get_gdt,
+ .set_gdt = svm_set_gdt,
+ .get_dr = svm_get_dr,
+ .set_dr = svm_set_dr,
+ .cache_regs = svm_cache_regs,
+ .decache_regs = svm_decache_regs,
+ .get_rflags = svm_get_rflags,
+ .set_rflags = svm_set_rflags,
+
+ .invlpg = svm_invlpg,
+ .flush_tlb = svm_flush_tlb,
+ .inject_page_fault = svm_inject_page_fault,
+
+ .inject_gp = svm_inject_gp,
+
+ .run = svm_vcpu_run,
+ .skip_emulated_instruction = skip_emulated_instruction,
+ .vcpu_setup = svm_vcpu_setup,
+};
+
+static int __init svm_init(void)
+{
+ kvm_emulator_want_group7_invlpg();
+ kvm_init_arch(&svm_arch_ops, THIS_MODULE);
+ return 0;
+}
+
+static void __exit svm_exit(void)
+{
+ kvm_exit_arch();
+}
+
+module_init(svm_init)
+module_exit(svm_exit)
-
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