+++ /dev/null
-INTERFACE [svm]:
-
-#include "task.h"
-#include "virt.h"
-
-class Vm : public Task
-{
-private:
- static void resume_vm(Mword phys_vmcb, Mword *regs)
- asm("resume_vm") __attribute__((__regparm__(3)));
- Unsigned8 _asid[Config::Max_num_cpus];
- Unsigned32 _asid_generation[Config::Max_num_cpus];
-
- enum
- {
- EFER_LME = 1 << 8,
- EFER_LMA = 1 << 10,
- };
-
-public:
- ~Vm() {}
-
- enum Operation
- {
- Vm_run = Task::Vm_ops + 0,
- };
-};
-
-// ------------------------------------------------------------------------
-INTERFACE [svm && debug]:
-
-EXTENSION class Vm
-{
-protected:
- struct Log_vm_svm_exit
- {
- Mword exitcode, exitinfo1, exitinfo2, rip;
- };
-
- static unsigned log_fmt(Tb_entry *, int max, char *buf) asm ("__fmt_vm_svm_exit");
-};
-
-// ------------------------------------------------------------------------
-IMPLEMENTATION [svm]:
-
-#include "context.h"
-#include "mem_space.h"
-#include "fpu.h"
-#include "ref_ptr.h"
-#include "svm.h"
-#include "thread.h" // XXX: circular dep, move this out here!
-#include "thread_state.h" // XXX: circular dep, move this out here!
-#include "virt.h"
-
-
-// ------------------------------------------------------------------------
-IMPLEMENTATION [svm && ia32]:
-
-PRIVATE static inline
-bool
-Vm::is_64bit()
-{ return false; }
-
-PRIVATE inline
-Address
-Vm::get_vm_cr3(Vmcb *)
-{
- // When running in 32bit mode we already return the page-table of our Vm
- // object, whether we're running with shadow or nested paging
- return mem_space()->phys_dir();
-}
-
-//----------------------------------------------------------------------------
-IMPLEMENTATION [svm && amd64]:
-
-PRIVATE static inline
-bool
-Vm::is_64bit()
-{ return true; }
-
-PRIVATE inline
-Address
-Vm::get_vm_cr3(Vmcb *v)
-{
- // When we have nested paging, we just return the 4lvl host page-table of
- // our Vm.
- if (v->np_enabled())
- return mem_space()->phys_dir();
-
- // When running with shadow paging and the guest is running in long mode
- // and has paging enabled, we can just return the 4lvl page table of our
- // host Vm object.
- if ( (v->state_save_area.efer & EFER_LME)
- && (v->state_save_area.cr0 & CR0_PG))
- return mem_space()->phys_dir();
-
- // Now it's getting tricky when running with shadow paging.
- // We need to obey the following rules:
- // - When the guest is not running in 64bit mode the CR3 one can set for
- // the page-table must be below 4G physical memory (i.e. bit 32-63 must
- // be zero). This is unfortunate when the host has memory above 4G as
- // Fiasco gets its memory from the end of physical memory, i.e.
- // page-table memory is above 4G.
- // - We need an appropriate page-table format for 32bit!
- // That means either a 2lvl page-table or a 3lvl PAE one. That would
- // require to maintain two page-tables for the guest, one for 32bit
- // mode execution and one for 64 bit execution. It is needed either for
- // the transition from real to long-mode via protected mode or for
- // 32bit only guests.
- // There's one trick to avoid having two PTs: 4lvl-PTs and 3lvl-PAE-PTs
- // have much in common so that it's possible to just take the the PDPE
- // one of the host as the 3lvl-PAE-PT for the guest. Well, not quite.
- // The problem is that SVM checks that MBZ bits in the PAE-PT entries
- // are really 0 as written in the spec. Now the 4lvl PT contains rights
- // bits there, so that this type of PT is refused and does not work on
- // real hardware.
- // So why is the code still here? Well, QEmu isn't so picky about the
- // bits in the PDPE and it thus works there...
- Address vm_cr3 = mem_space()->dir()->walk(Virt_addr(0), 0).e->addr();
- if (EXPECT_FALSE(!vm_cr3))
- {
- // force allocation of new secondary page-table level
- mem_space()->dir()->alloc_cast<Mem_space_q_alloc>()
- ->walk(Virt_addr(0), 1, Mem_space_q_alloc(ram_quota(),
- Mapped_allocator::allocator()));
- vm_cr3 = mem_space()->dir()->walk(Virt_addr(0), 0).e->addr();
- }
-
- if (EXPECT_FALSE(vm_cr3 >= 1UL << 32))
- {
- WARN("svm: Host page-table not under 4G, sorry.\n");
- return 0;
- }
-
- return vm_cr3;
-}
-
-//----------------------------------------------------------------------------
-IMPLEMENTATION [svm]:
-
-class Mem_space_vm : public Mem_space
-{
-public:
- Mem_space_vm(Ram_quota *q) : Mem_space(q, false) {}
- virtual Page_number map_max_address() const
- { return Page_number::create(1UL << (MWORD_BITS - Page_shift)); }
-};
-
-struct Vm_space_factory
-{
- /** Create a usual Mem_space object. */
- template< typename A1 >
- static void create(Mem_space *v, A1 a1)
- { new (v) Mem_space_vm(a1); }
-
- template< typename S >
- static void create(S *v)
- { new (v) S(); }
-};
-
-PROTECTED static
-slab_cache_anon*
-Vm::allocator()
-{
- static slab_cache_anon* slabs = new Kmem_slab_simple (sizeof (Vm),
- sizeof (Mword),
- "Vm");
- return slabs;
-}
-
-PROTECTED inline
-void *
-Vm::operator new (size_t size, void *p)
-{
- (void)size;
- assert (size == sizeof (Vm));
- return p;
-}
-
-PRIVATE inline
-Unsigned8
-Vm::asid ()
-{
- return _asid[current_cpu()];
-}
-
-PRIVATE inline
-void
-Vm::asid (Unsigned8 asid)
-{
- _asid[current_cpu()] = asid;
-}
-
-PRIVATE inline
-Unsigned32
-Vm::asid_generation ()
-{
- return _asid_generation[current_cpu()];
-}
-
-PRIVATE inline
-void
-Vm::asid_generation (Unsigned32 generation)
-{
- _asid_generation[current_cpu()] = generation;
-}
-
-PUBLIC
-Vm::Vm(Ram_quota *q)
-: Task(Vm_space_factory(), q, L4_fpage(0))
-{
- memset(_asid, 0, sizeof(_asid));
- memset(_asid_generation, 0, sizeof(_asid_generation));
-}
-
-PUBLIC
-static
-Vm *
-Vm::create(Ram_quota *quota)
-{
- if (void *t = allocator()->q_alloc(quota))
- {
- Vm *a = new (t) Vm(quota);
- if (a->valid())
- return a;
-
- delete a;
- }
-
- return 0;
-}
-// to do:
-// - handle cr2
-// - force fpu ownership
-// - debug registers not covered by VMCB
-
-PRIVATE
-void
-Vm::copy_state_save_area(Vmcb *dest, Vmcb *src)
-{
- Vmcb_state_save_area *d = &dest->state_save_area;
- Vmcb_state_save_area *s = &src->state_save_area;
-
- d->es_sel = s->es_sel;
- d->es_attrib = s->es_attrib;
- d->es_limit = s->es_limit;
- d->es_base = s->es_base;
-
- d->cs_sel = s->cs_sel;
- d->cs_attrib = s->cs_attrib;
- d->cs_limit = s->cs_limit;
- d->cs_base = s->cs_base;
-
- d->ss_sel = s->ss_sel;
- d->ss_attrib = s->ss_attrib;
- d->ss_limit = s->ss_limit;
- d->ss_base = s->ss_base;
-
- d->ds_sel = s->ds_sel;
- d->ds_attrib = s->ds_attrib;
- d->ds_limit = s->ds_limit;
- d->ds_base = s->ds_base;
-
- d->fs_sel = s->fs_sel;
- d->fs_attrib = s->fs_attrib;
- d->fs_limit = s->fs_limit;
- d->fs_base = s->fs_base;
-
- d->gs_sel = s->gs_sel;
- d->gs_attrib = s->gs_attrib;
- d->gs_limit = s->gs_limit;
- d->gs_base = s->gs_base;
-
- d->gdtr_sel = s->gdtr_sel;
- d->gdtr_attrib = s->gdtr_attrib;
- d->gdtr_limit = s->gdtr_limit;
- d->gdtr_base = s->gdtr_base;
-
- d->ldtr_sel = s->ldtr_sel;
- d->ldtr_attrib = s->ldtr_attrib;
- d->ldtr_limit = s->ldtr_limit;
- d->ldtr_base = s->ldtr_base;
-
- d->idtr_sel = s->idtr_sel;
- d->idtr_attrib = s->idtr_attrib;
- d->idtr_limit = s->idtr_limit;
- d->idtr_base = s->idtr_base;
-
- d->tr_sel = s->tr_sel;
- d->tr_attrib = s->tr_attrib;
- d->tr_limit = s->tr_limit;
- d->tr_base = s->tr_base;
-
- d->cpl = s->cpl;
- d->efer = s->efer;
-
- d->cr4 = s->cr4;
- d->cr3 = s->cr3;
- d->cr0 = s->cr0;
- d->dr7 = s->dr7;
- d->dr6 = s->dr6;
- d->rflags = s->rflags;
-
- d->rip = s->rip;
- d->rsp = s->rsp;
- d->rax = s->rax;
-
- d->star = s->star;
- d->lstar = s->lstar;
- d->cstar = s->cstar;
- d->sfmask = s->sfmask;
- d->kernelgsbase = s->kernelgsbase;
- d->sysenter_cs = s->sysenter_cs;
- d->sysenter_esp = s->sysenter_esp;
- d->sysenter_eip = s->sysenter_eip;
- d->cr2 = s->cr2;
-
- d->g_pat = s->g_pat;
- d->dbgctl = s->dbgctl;
- d->br_from = s->br_from;
- d->br_to = s->br_to;
- d->lastexcpfrom = s->lastexcpfrom;
- d->last_excpto = s->last_excpto;
-}
-
-
-PRIVATE
-void
-Vm::copy_control_area(Vmcb *dest, Vmcb *src)
-{
- Vmcb_control_area *d = &dest->control_area;
- Vmcb_control_area *s = &src->control_area;
-
- d->intercept_rd_crX = s->intercept_rd_crX;
- d->intercept_wr_crX = s->intercept_wr_crX;
-
- d->intercept_rd_drX = s->intercept_rd_drX;
- d->intercept_wr_drX = s->intercept_wr_drX;
-
- d->intercept_exceptions = s->intercept_exceptions;
-
- d->intercept_instruction0 = s->intercept_instruction0;
- d->intercept_instruction1 = s->intercept_instruction1;
-
- // skip iopm_base_pa and msrpm_base_pa
-
- d->tsc_offset = s->tsc_offset;
- d->guest_asid_tlb_ctl = s->guest_asid_tlb_ctl;
- d->interrupt_ctl = s->interrupt_ctl;
- d->interrupt_shadow = s->interrupt_shadow;
- d->exitcode = s->exitcode;
- d->exitinfo1 = s->exitinfo1;
- d->exitinfo2 = s->exitinfo2;
- d->exitintinfo = s->exitintinfo;
- d->np_enable = s->np_enable;
-
- d->eventinj = s->eventinj;
- d->n_cr3 = s->n_cr3;
- d->lbr_virtualization_enable = s->lbr_virtualization_enable;
-}
-
-
-/* skip anything that does not change */
-PRIVATE
-void
-Vm::copy_control_area_back(Vmcb *dest, Vmcb *src)
-{
- Vmcb_control_area *d = &dest->control_area;
- Vmcb_control_area *s = &src->control_area;
-
- d->interrupt_ctl = s->interrupt_ctl;
- d->interrupt_shadow = s->interrupt_shadow;
-
- d->exitcode = s->exitcode;
- d->exitinfo1 = s->exitinfo1;
- d->exitinfo2 = s->exitinfo2;
- d->exitintinfo = s->exitintinfo;
-
- d->eventinj = s->eventinj;
-}
-
-/** \brief Choose an ASID for this Vm.
- *
- * Choose an ASID for this Vm. The ASID provided by userspace is ignored
- * instead the kernel picks one.
- * Userspace uses the flush-bit to receive a new ASID for this Vm.
- * All ASIDs are flushed as soon as the kernel runs out of ASIDs.
- *
- * @param vmcb_s external VMCB provided by userspace
- * @param kernel_vmcb_s our VMCB
- *
- */
-PRIVATE
-void
-Vm::configure_asid (Vmcb *vmcb_s, Vmcb *kernel_vmcb_s)
-{
- assert (cpu_lock.test());
-
- Svm &s = Svm::cpus.cpu(current_cpu());
-
- if (// vmm requests flush
- ((vmcb_s->control_area.guest_asid_tlb_ctl >> 32) & 1) == 1 ||
- // our asid is not valid or expired
- !(s.asid_valid(asid(), asid_generation())))
- {
- asid(s.next_asid());
- asid_generation(s.global_asid_generation());
- }
-
- assert(s.asid_valid(asid(), asid_generation()));
-#if 1
- kernel_vmcb_s->control_area.guest_asid_tlb_ctl = asid();
- if (s.flush_all_asids())
- {
- kernel_vmcb_s->control_area.guest_asid_tlb_ctl |= (1ULL << 32);
- s.flush_all_asids(false);
- }
-#else
- kernel_vmcb_s->control_area.guest_asid_tlb_ctl = 1;
- kernel_vmcb_s->control_area.guest_asid_tlb_ctl |= (1ULL << 32);
-#endif
-}
-
-L4_msg_tag
-Vm::sys_vm_run(Syscall_frame *f, Utcb *utcb)
-{
- //Mword host_cr0;
- Unsigned64 orig_cr3, orig_ncr3;
-
- assert (cpu_lock.test());
-
- /* these 4 must not use ldt entries */
- assert (!(Cpu::get_cs() & (1 << 2)));
- assert (!(Cpu::get_ss() & (1 << 2)));
- assert (!(Cpu::get_ds() & (1 << 2)));
- assert (!(Cpu::get_es() & (1 << 2)));
-
- Svm &s = Svm::cpus.cpu(current_cpu());
-
- L4_msg_tag const &tag = f->tag();
-
- if (EXPECT_FALSE(!s.svm_enabled()))
- {
- WARN("svm: not supported/enabled\n");
- return commit_result(-L4_err::EInval);
- }
-
- if (EXPECT_FALSE(tag.words() < 1 + Svm::Gpregs_words))
- {
- WARN("svm: Invalid message length\n");
- return commit_result(-L4_err::EInval);
- }
-
- L4_snd_item_iter vmcb_item(utcb, tag.words());
-
- if (EXPECT_FALSE(!tag.items() || !vmcb_item.next()))
- return commit_result(-L4_err::EInval);
-
- L4_fpage vmcb_fpage(vmcb_item.get()->d);
-
- if (EXPECT_FALSE(!vmcb_fpage.is_mempage()))
- {
- WARN("svm: Fpage invalid\n");
- return commit_error(utcb, L4_error::Overflow);
- }
-
- if (EXPECT_FALSE(vmcb_fpage.order() < 12))
- return commit_result(-L4_err::EInval);
-
- Vmcb *vmcb_s = (Vmcb *)(Virt_addr(vmcb_fpage.mem_address()).value());
- Vmcb *kernel_vmcb_s = s.kernel_vmcb();
-
- if (EXPECT_FALSE(vmcb_s->np_enabled() && !s.has_npt()))
- {
- WARN("svm: No NPT available\n");
- return commit_result(-L4_err::EInval);
- }
-
- Address vm_cr3 = get_vm_cr3(vmcb_s);
- // can only fail on 64bit, will be optimized away on 32bit
- if (EXPECT_FALSE(is_64bit() && !vm_cr3))
- return commit_result(-L4_err::ENomem);
-
- Mem_space::Phys_addr phys_vmcb;
- Mem_space::Size size;
- bool resident;
- unsigned int page_attribs;
-
- Mem_space *const curr_mem_space = current()->space()->mem_space();
- resident = curr_mem_space->v_lookup(Virt_addr(vmcb_s), &phys_vmcb, &size, &page_attribs);
-
- if (!resident)
- {
- WARN("svm: VMCB invalid\n");
- return commit_result(-L4_err::EInval);
- }
-#if 0
- // currently only support for nested pagetables
- // if shadow page tables are to be allowed then cr0
- // needs further scrutiny and cr3 must not be accessible
- if((vmcb_s->control_area.np_enable & 1) != 1)
- return commit_result(-L4_err::EInval);
-#endif
-
- // neither EFER.LME nor EFER.LMA must be set
- if (EXPECT_FALSE(!is_64bit()
- && (vmcb_s->state_save_area.efer & (EFER_LME | EFER_LMA))))
- {
- WARN("svm: EFER invalid %llx\n", vmcb_s->state_save_area.efer);
- return commit_result(-L4_err::EInval);
- }
-
- // EFER.SVME must be set
- if (!(vmcb_s->state_save_area.efer & 0x1000))
- {
- WARN("svm: EFER invalid %llx\n", vmcb_s->state_save_area.efer);
- return commit_result(-L4_err::EInval);
- }
- // allow PAE in combination with NPT
-#if 0
- // CR4.PAE must be clear
- if(vmcb_s->state_save_area.cr4 & 0x20)
- return commit_result(-L4_err::EInval);
-#endif
-
- // XXX:
- // This generates a circular dep between thread<->task, this cries for a
- // new abstraction...
- if (!(current()->state() & Thread_fpu_owner))
- {
- if (!current_thread()->switchin_fpu())
- {
- WARN("svm: switchin_fpu failed\n");
- return commit_result(-L4_err::EInval);
- }
- }
-
-#if 0 //should never happen
- host_cr0 = Cpu::get_cr0();
- // the VMM does not currently own the fpu but wants to
- // make it available for the guest. This may happen
- // if it was descheduled between activating the fpu and
- // executing the vm_run operation
- if (!(vmcb_s->state_save_area.cr0 & 0x8) && (host_cr0 & 0x8))
- {
- WARN("svm: FPU TS\n");
- return commit_result(-L4_err::EInval);
- }
-#endif
-
- // increment our refcount, and drop it at the end automatically
- Ref_ptr<Vm> pin_myself(this);
-
- // sanitize VMCB
-
- orig_cr3 = vmcb_s->state_save_area.cr3;
- orig_ncr3 = vmcb_s->control_area.n_cr3;
-
- copy_control_area(kernel_vmcb_s, vmcb_s);
- copy_state_save_area(kernel_vmcb_s, vmcb_s);
-
- if (EXPECT_FALSE(is_64bit() && !kernel_vmcb_s->np_enabled()
- && (kernel_vmcb_s->state_save_area.cr0 & CR0_PG)
- && !(kernel_vmcb_s->state_save_area.cr4 & CR4_PAE)))
- {
- WARN("svm: No 32bit shadow page-tables on AMD64, use PAE!\n");
- return commit_result(-L4_err::EInval);
- }
-
- // set MCE according to host
- kernel_vmcb_s->state_save_area.cr4 |= Cpu::get_cr4() & CR4_MCE;
-
- // allow w access to cr0, cr2, cr3
- // allow r access to cr0, cr2, cr3, cr4
- // to do: check if enabling PAE in cr4 needs to be controlled
-
- // allow r/w access to dr[0-7]
- kernel_vmcb_s->control_area.intercept_rd_drX |= 0xff00;
- kernel_vmcb_s->control_area.intercept_wr_drX |= 0xff00;
-
-#if 0
- // intercept exception vectors 0-31
- kernel_vmcb_s->control_area.intercept_exceptions = 0xffffffff;
-#endif
-
- // enable iopm and msrpm
- kernel_vmcb_s->control_area.intercept_instruction0 |= 0x18000000;
- // intercept FERR_FREEZE and shutdown events
- kernel_vmcb_s->control_area.intercept_instruction0 |= 0xc0000000;
- // intercept INTR/NMI/SMI/INIT
- kernel_vmcb_s->control_area.intercept_instruction0 |= 0xf;
- // intercept INVD
- kernel_vmcb_s->control_area.intercept_instruction0 |= (1 << 22);
- // intercept HLT
- kernel_vmcb_s->control_area.intercept_instruction0 |= (1 << 24);
- // intercept task switch
- kernel_vmcb_s->control_area.intercept_instruction0 |= (1 << 29);
- // intercept shutdown
- kernel_vmcb_s->control_area.intercept_instruction0 |= (1 << 31);
- // intercept MONITOR/MWAIT
- kernel_vmcb_s->control_area.intercept_instruction1 |= (1 << 10) | (1 << 11);
-
- // intercept virtualization related instructions
- // vmrun interception is required by the hardware
- kernel_vmcb_s->control_area.intercept_instruction1 |= 0xff;
-
- Mword kernel_vmcb_pa = s.kernel_vmcb_pa();
- Unsigned64 iopm_base_pa = s.iopm_base_pa();
- Unsigned64 msrpm_base_pa = s.msrpm_base_pa();
-
- kernel_vmcb_s->control_area.iopm_base_pa = iopm_base_pa;
- kernel_vmcb_s->control_area.msrpm_base_pa = msrpm_base_pa;
-
- configure_asid(vmcb_s, kernel_vmcb_s);
-
- // 7:0 V_TPR, 8 V_IRQ, 15:9 reserved SBZ,
- // 19:16 V_INTR_PRIO, 20 V_IGN_TPR, 23:21 reserved SBZ
- // 24 V_INTR_MASKING 31:25 reserved SBZ
- // 39:32 V_INTR_VECTOR, 63:40 reserved SBZ
-#if 0
- kernel_vmcb_s->control_area.interrupt_ctl = 0x10f0000;
-#endif
- // enable IRQ masking virtualization
- kernel_vmcb_s->control_area.interrupt_ctl |= 0x01000000;
-
-#if 0
- // 0 INTERRUPT_SHADOW, 31:1 reserved SBZ
- // 63:32 reserved SBZ
- kernel_vmcb_s->control_area.interrupt_shadow = 0;
-#endif
-
- kernel_vmcb_s->control_area.exitcode = 0;
- kernel_vmcb_s->control_area.exitinfo1 = 0;
- kernel_vmcb_s->control_area.exitinfo2 = 0;
- kernel_vmcb_s->control_area.exitintinfo = 0;
-
-#if 0
- // 0/1 NP_ENABLE, 31:1 reserved SBZ
- kernel_vmcb_s->control_area.np_enable = 1;
-
- // 31 VALID, EVENTINJ
- kernel_vmcb_s->control_area.eventinj = 0;
-#endif
-
- // N_CR3
- kernel_vmcb_s->control_area.n_cr3 = vm_cr3;
-
- if (!kernel_vmcb_s->np_enabled())
- {
- // to do: check that the vmtask has the
- // VM property set, i.e. does not contain mappings
- // to the fiasco kernel regions or runs with PL 3
-
- // printf("nested paging disabled, use n_cr3 as cr3\n");
- kernel_vmcb_s->state_save_area.cr3 = vm_cr3;
-
- // intercept accesses to cr0, cr3 and cr4
- kernel_vmcb_s->control_area.intercept_rd_crX = 0xfff9;
- kernel_vmcb_s->control_area.intercept_wr_crX = 0xfff9;
- }
-
-#if 0
- kernel_vmcb_s->control_area.lbr_virtualization_enable = 0;
-#endif
-
-
- // to do:
- // - initialize VM_HSAVE_PA (done)
- // - supply trusted msrpm_base_pa and iopm_base_pa (done)
- // - save host state not covered by VMRUN/VMEXIT (ldt, some segments etc) (done)
- // - disable interupts (done)
- // - trigger interecepted device and timer interrupts (done, not necessary)
- // - check host CR0.TS (floating point registers) (done)
-
- Unsigned64 sysenter_cs, sysenter_eip, sysenter_esp;
- Unsigned32 fs, gs;
- Unsigned16 tr, ldtr;
- //Unsigned32 cr4;
-
- sysenter_cs = Cpu::rdmsr(MSR_SYSENTER_CS);
- sysenter_eip = Cpu::rdmsr(MSR_SYSENTER_EIP);
- sysenter_esp = Cpu::rdmsr(MSR_SYSENTER_ESP);
-
- fs = Cpu::get_fs();
- gs = Cpu::get_gs();
- tr = Cpu::get_tr();
- ldtr = Cpu::get_ldt();
-
- Gdt_entry tr_entry;
-
- tr_entry = (*Cpu::cpus.cpu(current_cpu()).get_gdt())[tr / 8];
-
-#if 0
- // to do: check if the nested page table walker looks
- // into the TLB. if so, global pages have to be disabled in
- // the host
- cr4 = Cpu::get_cr4();
-
- if (cr4 & CR4_PGE)
- // disable support for global pages as the vm task has
- // a divergent upper memory region from the regular tasks
- Cpu::set_cr4(cr4 & ~CR4_PGE);
-#endif
-
- resume_vm(kernel_vmcb_pa, &utcb->values[1]);
-
-
-#if 0
- if (cr4 & CR4_PGE)
- Cpu::set_cr4(cr4);
-#endif
-
- Cpu::wrmsr(sysenter_cs, MSR_SYSENTER_CS);
- Cpu::wrmsr(sysenter_eip, MSR_SYSENTER_EIP);
- Cpu::wrmsr(sysenter_esp, MSR_SYSENTER_ESP);
-
- Cpu::set_ldt(ldtr);
- Cpu::set_fs(fs);
- Cpu::set_gs(gs);
-
- // clear busy flag
- Gdt_entry tss_entry;
-
- tss_entry = (*Cpu::cpus.cpu(current_cpu()).get_gdt())[tr / 8];
- tss_entry.access &= 0xfd;
- (*Cpu::cpus.cpu(current_cpu()).get_gdt())[tr / 8] = tss_entry;
-
- Cpu::set_tr(tr); // TODO move under stgi in asm
-
- copy_state_save_area(vmcb_s, kernel_vmcb_s);
- copy_control_area_back(vmcb_s, kernel_vmcb_s);
-
- if (!(vmcb_s->np_enabled()))
- vmcb_s->state_save_area.cr3 = orig_cr3;
-
- vmcb_s->control_area.n_cr3 = orig_ncr3;
-
- LOG_TRACE("VM-SVM", "svm", current(), __fmt_vm_svm_exit,
- Log_vm_svm_exit *l = tbe->payload<Log_vm_svm_exit>();
- l->exitcode = vmcb_s->control_area.exitcode;
- l->exitinfo1 = vmcb_s->control_area.exitinfo1;
- l->exitinfo2 = vmcb_s->control_area.exitinfo2;
- l->rip = vmcb_s->state_save_area.rip;
- );
-
- return commit_result(L4_error::None);
-}
-
-PUBLIC
-void
-Vm::invoke(L4_obj_ref obj, Mword rights, Syscall_frame *f, Utcb *utcb)
-{
- if (EXPECT_FALSE(f->tag().proto() != L4_msg_tag::Label_task))
- {
- f->tag(commit_result(-L4_err::EBadproto));
- return;
- }
-
- switch (utcb->values[0])
- {
- case Vm_run:
- f->tag(sys_vm_run(f, utcb));
- return;
- default:
- Task::invoke(obj, rights, f, utcb);
- return;
- }
-}
-
-// ------------------------------------------------------------------------
-IMPLEMENTATION [svm && debug]:
-
-IMPLEMENT
-unsigned
-Vm::log_fmt(Tb_entry *e, int max, char *buf)
-{
- Log_vm_svm_exit *l = e->payload<Log_vm_svm_exit>();
- return snprintf(buf, max, "ec=%lx ei1=%08lx ei2=%08lx rip=%08lx",
- l->exitcode, l->exitinfo1, l->exitinfo2, l->rip);
-}
projects / l4.git / commitdiff