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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH for-next 5/7] x86_64: move PV specific code under pv/x86_64
No functional change.
Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
xen/arch/x86/pv/Makefile | 1 +
xen/arch/x86/pv/x86_64/Makefile | 1 +
xen/arch/x86/{ => pv}/x86_64/compat/traps.c | 0
xen/arch/x86/pv/x86_64/traps.c | 398 ++++++++++++++++++++++++++++
xen/arch/x86/x86_64/traps.c | 377 --------------------------
5 files changed, 400 insertions(+), 377 deletions(-)
create mode 100644 xen/arch/x86/pv/x86_64/Makefile
rename xen/arch/x86/{ => pv}/x86_64/compat/traps.c (100%)
create mode 100644 xen/arch/x86/pv/x86_64/traps.c
diff --git a/xen/arch/x86/pv/Makefile b/xen/arch/x86/pv/Makefile
index c996dcc149..d4aca44c06 100644
--- a/xen/arch/x86/pv/Makefile
+++ b/xen/arch/x86/pv/Makefile
@@ -1,4 +1,5 @@
subdir-y += compat
+subdir-y += x86_64
obj-y += hypercall.o
obj-bin-y += dom0_build.init.o
diff --git a/xen/arch/x86/pv/x86_64/Makefile b/xen/arch/x86/pv/x86_64/Makefile
new file mode 100644
index 0000000000..c55c340bc1
--- /dev/null
+++ b/xen/arch/x86/pv/x86_64/Makefile
@@ -0,0 +1 @@
+obj-y += traps.o
diff --git a/xen/arch/x86/x86_64/compat/traps.c
b/xen/arch/x86/pv/x86_64/compat/traps.c
similarity index 100%
rename from xen/arch/x86/x86_64/compat/traps.c
rename to xen/arch/x86/pv/x86_64/compat/traps.c
diff --git a/xen/arch/x86/pv/x86_64/traps.c b/xen/arch/x86/pv/x86_64/traps.c
new file mode 100644
index 0000000000..ec7d23eaf7
--- /dev/null
+++ b/xen/arch/x86/pv/x86_64/traps.c
@@ -0,0 +1,398 @@
+
+#include <xen/guest_access.h>
+#include <xen/hypercall.h>
+#include <xen/nmi.h>
+#include <xen/types.h>
+
+#include <asm/current.h>
+#include <asm/event.h>
+#include <asm/msr.h>
+#include <asm/traps.h>
+
+#include <public/callback.h>
+
+void toggle_guest_mode(struct vcpu *v)
+{
+ if ( is_pv_32bit_vcpu(v) )
+ return;
+ if ( cpu_has_fsgsbase )
+ {
+ if ( v->arch.flags & TF_kernel_mode )
+ v->arch.pv_vcpu.gs_base_kernel = __rdgsbase();
+ else
+ v->arch.pv_vcpu.gs_base_user = __rdgsbase();
+ }
+ v->arch.flags ^= TF_kernel_mode;
+ asm volatile ( "swapgs" );
+ update_cr3(v);
+ /* Don't flush user global mappings from the TLB. Don't tick TLB clock. */
+ asm volatile ( "mov %0, %%cr3" : : "r" (v->arch.cr3) : "memory" );
+ if ( !(v->arch.flags & TF_kernel_mode) )
+ return;
+
+ if ( v->arch.pv_vcpu.need_update_runstate_area &&
+ update_runstate_area(v) )
+ v->arch.pv_vcpu.need_update_runstate_area = 0;
+
+ if ( v->arch.pv_vcpu.pending_system_time.version &&
+ update_secondary_system_time(v,
+ &v->arch.pv_vcpu.pending_system_time) )
+ v->arch.pv_vcpu.pending_system_time.version = 0;
+}
+
+unsigned long do_iret(void)
+{
+ struct cpu_user_regs *regs = guest_cpu_user_regs();
+ struct iret_context iret_saved;
+ struct vcpu *v = current;
+
+ if ( unlikely(copy_from_user(&iret_saved, (void *)regs->rsp,
+ sizeof(iret_saved))) )
+ {
+ gprintk(XENLOG_ERR,
+ "Fault while reading IRET context from guest stack\n");
+ goto exit_and_crash;
+ }
+
+ /* Returning to user mode? */
+ if ( (iret_saved.cs & 3) == 3 )
+ {
+ if ( unlikely(pagetable_is_null(v->arch.guest_table_user)) )
+ {
+ gprintk(XENLOG_ERR,
+ "Guest switching to user mode with no user page tables\n");
+ goto exit_and_crash;
+ }
+ toggle_guest_mode(v);
+ }
+
+ if ( VM_ASSIST(v->domain, architectural_iopl) )
+ v->arch.pv_vcpu.iopl = iret_saved.rflags & X86_EFLAGS_IOPL;
+
+ regs->rip = iret_saved.rip;
+ regs->cs = iret_saved.cs | 3; /* force guest privilege */
+ regs->rflags = ((iret_saved.rflags & ~(X86_EFLAGS_IOPL|X86_EFLAGS_VM))
+ | X86_EFLAGS_IF);
+ regs->rsp = iret_saved.rsp;
+ regs->ss = iret_saved.ss | 3; /* force guest privilege */
+
+ if ( !(iret_saved.flags & VGCF_in_syscall) )
+ {
+ regs->entry_vector &= ~TRAP_syscall;
+ regs->r11 = iret_saved.r11;
+ regs->rcx = iret_saved.rcx;
+ }
+
+ /* Restore upcall mask from supplied EFLAGS.IF. */
+ vcpu_info(v, evtchn_upcall_mask) = !(iret_saved.rflags & X86_EFLAGS_IF);
+
+ async_exception_cleanup(v);
+
+ /* Saved %rax gets written back to regs->rax in entry.S. */
+ return iret_saved.rax;
+
+ exit_and_crash:
+ domain_crash(v->domain);
+ return 0;
+}
+
+static unsigned int write_stub_trampoline(
+ unsigned char *stub, unsigned long stub_va,
+ unsigned long stack_bottom, unsigned long target_va)
+{
+ /* movabsq %rax, stack_bottom - 8 */
+ stub[0] = 0x48;
+ stub[1] = 0xa3;
+ *(uint64_t *)&stub[2] = stack_bottom - 8;
+
+ /* movq %rsp, %rax */
+ stub[10] = 0x48;
+ stub[11] = 0x89;
+ stub[12] = 0xe0;
+
+ /* movabsq $stack_bottom - 8, %rsp */
+ stub[13] = 0x48;
+ stub[14] = 0xbc;
+ *(uint64_t *)&stub[15] = stack_bottom - 8;
+
+ /* pushq %rax */
+ stub[23] = 0x50;
+
+ /* jmp target_va */
+ stub[24] = 0xe9;
+ *(int32_t *)&stub[25] = target_va - (stub_va + 29);
+
+ /* Round up to a multiple of 16 bytes. */
+ return 32;
+}
+
+DEFINE_PER_CPU(struct stubs, stubs);
+void lstar_enter(void);
+void cstar_enter(void);
+
+void subarch_percpu_traps_init(void)
+{
+ unsigned long stack_bottom = get_stack_bottom();
+ unsigned long stub_va = this_cpu(stubs.addr);
+ unsigned char *stub_page;
+ unsigned int offset;
+
+ /* IST_MAX IST pages + 1 syscall page + 1 guard page + primary stack. */
+ BUILD_BUG_ON((IST_MAX + 2) * PAGE_SIZE + PRIMARY_STACK_SIZE > STACK_SIZE);
+
+ stub_page = map_domain_page(_mfn(this_cpu(stubs.mfn)));
+
+ /*
+ * Trampoline for SYSCALL entry from 64-bit mode. The VT-x HVM vcpu
+ * context switch logic relies on the SYSCALL trampoline being at the
+ * start of the stubs.
+ */
+ wrmsrl(MSR_LSTAR, stub_va);
+ offset = write_stub_trampoline(stub_page + (stub_va & ~PAGE_MASK),
+ stub_va, stack_bottom,
+ (unsigned long)lstar_enter);
+ stub_va += offset;
+
+ if ( boot_cpu_data.x86_vendor == X86_VENDOR_INTEL ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR )
+ {
+ /* SYSENTER entry. */
+ wrmsrl(MSR_IA32_SYSENTER_ESP, stack_bottom);
+ wrmsrl(MSR_IA32_SYSENTER_EIP, (unsigned long)sysenter_entry);
+ wrmsr(MSR_IA32_SYSENTER_CS, __HYPERVISOR_CS, 0);
+ }
+
+ /* Trampoline for SYSCALL entry from compatibility mode. */
+ wrmsrl(MSR_CSTAR, stub_va);
+ offset += write_stub_trampoline(stub_page + (stub_va & ~PAGE_MASK),
+ stub_va, stack_bottom,
+ (unsigned long)cstar_enter);
+
+ /* Don't consume more than half of the stub space here. */
+ ASSERT(offset <= STUB_BUF_SIZE / 2);
+
+ unmap_domain_page(stub_page);
+
+ /* Common SYSCALL parameters. */
+ wrmsrl(MSR_STAR, XEN_MSR_STAR);
+ wrmsrl(MSR_SYSCALL_MASK, XEN_SYSCALL_MASK);
+}
+
+void init_int80_direct_trap(struct vcpu *v)
+{
+ struct trap_info *ti = &v->arch.pv_vcpu.trap_ctxt[0x80];
+ struct trap_bounce *tb = &v->arch.pv_vcpu.int80_bounce;
+
+ tb->flags = TBF_EXCEPTION;
+ tb->cs = ti->cs;
+ tb->eip = ti->address;
+
+ if ( null_trap_bounce(v, tb) )
+ tb->flags = 0;
+}
+
+static long register_guest_callback(struct callback_register *reg)
+{
+ long ret = 0;
+ struct vcpu *v = current;
+
+ if ( !is_canonical_address(reg->address) )
+ return -EINVAL;
+
+ switch ( reg->type )
+ {
+ case CALLBACKTYPE_event:
+ v->arch.pv_vcpu.event_callback_eip = reg->address;
+ break;
+
+ case CALLBACKTYPE_failsafe:
+ v->arch.pv_vcpu.failsafe_callback_eip = reg->address;
+ if ( reg->flags & CALLBACKF_mask_events )
+ set_bit(_VGCF_failsafe_disables_events,
+ &v->arch.vgc_flags);
+ else
+ clear_bit(_VGCF_failsafe_disables_events,
+ &v->arch.vgc_flags);
+ break;
+
+ case CALLBACKTYPE_syscall:
+ v->arch.pv_vcpu.syscall_callback_eip = reg->address;
+ if ( reg->flags & CALLBACKF_mask_events )
+ set_bit(_VGCF_syscall_disables_events,
+ &v->arch.vgc_flags);
+ else
+ clear_bit(_VGCF_syscall_disables_events,
+ &v->arch.vgc_flags);
+ break;
+
+ case CALLBACKTYPE_syscall32:
+ v->arch.pv_vcpu.syscall32_callback_eip = reg->address;
+ v->arch.pv_vcpu.syscall32_disables_events =
+ !!(reg->flags & CALLBACKF_mask_events);
+ break;
+
+ case CALLBACKTYPE_sysenter:
+ v->arch.pv_vcpu.sysenter_callback_eip = reg->address;
+ v->arch.pv_vcpu.sysenter_disables_events =
+ !!(reg->flags & CALLBACKF_mask_events);
+ break;
+
+ case CALLBACKTYPE_nmi:
+ ret = register_guest_nmi_callback(reg->address);
+ break;
+
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ return ret;
+}
+
+static long unregister_guest_callback(struct callback_unregister *unreg)
+{
+ long ret;
+
+ switch ( unreg->type )
+ {
+ case CALLBACKTYPE_event:
+ case CALLBACKTYPE_failsafe:
+ case CALLBACKTYPE_syscall:
+ case CALLBACKTYPE_syscall32:
+ case CALLBACKTYPE_sysenter:
+ ret = -EINVAL;
+ break;
+
+ case CALLBACKTYPE_nmi:
+ ret = unregister_guest_nmi_callback();
+ break;
+
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ return ret;
+}
+
+
+long do_callback_op(int cmd, XEN_GUEST_HANDLE_PARAM(const_void) arg)
+{
+ long ret;
+
+ switch ( cmd )
+ {
+ case CALLBACKOP_register:
+ {
+ struct callback_register reg;
+
+ ret = -EFAULT;
+ if ( copy_from_guest(®, arg, 1) )
+ break;
+
+ ret = register_guest_callback(®);
+ }
+ break;
+
+ case CALLBACKOP_unregister:
+ {
+ struct callback_unregister unreg;
+
+ ret = -EFAULT;
+ if ( copy_from_guest(&unreg, arg, 1) )
+ break;
+
+ ret = unregister_guest_callback(&unreg);
+ }
+ break;
+
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ return ret;
+}
+
+long do_set_callbacks(unsigned long event_address,
+ unsigned long failsafe_address,
+ unsigned long syscall_address)
+{
+ struct callback_register event = {
+ .type = CALLBACKTYPE_event,
+ .address = event_address,
+ };
+ struct callback_register failsafe = {
+ .type = CALLBACKTYPE_failsafe,
+ .address = failsafe_address,
+ };
+ struct callback_register syscall = {
+ .type = CALLBACKTYPE_syscall,
+ .address = syscall_address,
+ };
+
+ register_guest_callback(&event);
+ register_guest_callback(&failsafe);
+ register_guest_callback(&syscall);
+
+ return 0;
+}
+
+static void hypercall_page_initialise_ring3_kernel(void *hypercall_page)
+{
+ char *p;
+ int i;
+
+ /* Fill in all the transfer points with template machine code. */
+ for ( i = 0; i < (PAGE_SIZE / 32); i++ )
+ {
+ if ( i == __HYPERVISOR_iret )
+ continue;
+
+ p = (char *)(hypercall_page + (i * 32));
+ *(u8 *)(p+ 0) = 0x51; /* push %rcx */
+ *(u16 *)(p+ 1) = 0x5341; /* push %r11 */
+ *(u8 *)(p+ 3) = 0xb8; /* mov $<i>,%eax */
+ *(u32 *)(p+ 4) = i;
+ *(u16 *)(p+ 8) = 0x050f; /* syscall */
+ *(u16 *)(p+10) = 0x5b41; /* pop %r11 */
+ *(u8 *)(p+12) = 0x59; /* pop %rcx */
+ *(u8 *)(p+13) = 0xc3; /* ret */
+ }
+
+ /*
+ * HYPERVISOR_iret is special because it doesn't return and expects a
+ * special stack frame. Guests jump at this transfer point instead of
+ * calling it.
+ */
+ p = (char *)(hypercall_page + (__HYPERVISOR_iret * 32));
+ *(u8 *)(p+ 0) = 0x51; /* push %rcx */
+ *(u16 *)(p+ 1) = 0x5341; /* push %r11 */
+ *(u8 *)(p+ 3) = 0x50; /* push %rax */
+ *(u8 *)(p+ 4) = 0xb8; /* mov $__HYPERVISOR_iret,%eax */
+ *(u32 *)(p+ 5) = __HYPERVISOR_iret;
+ *(u16 *)(p+ 9) = 0x050f; /* syscall */
+}
+
+#include "compat/traps.c"
+
+void hypercall_page_initialise(struct domain *d, void *hypercall_page)
+{
+ memset(hypercall_page, 0xCC, PAGE_SIZE);
+ if ( is_hvm_domain(d) )
+ hvm_hypercall_page_initialise(d, hypercall_page);
+ else if ( !is_pv_32bit_domain(d) )
+ hypercall_page_initialise_ring3_kernel(hypercall_page);
+ else
+ hypercall_page_initialise_ring1_kernel(hypercall_page);
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/arch/x86/x86_64/traps.c b/xen/arch/x86/x86_64/traps.c
index ad4d6c1f44..9b1df969c7 100644
--- a/xen/arch/x86/x86_64/traps.c
+++ b/xen/arch/x86/x86_64/traps.c
@@ -254,383 +254,6 @@ void do_double_fault(struct cpu_user_regs *regs)
panic("DOUBLE FAULT -- system shutdown");
}
-void toggle_guest_mode(struct vcpu *v)
-{
- if ( is_pv_32bit_vcpu(v) )
- return;
- if ( cpu_has_fsgsbase )
- {
- if ( v->arch.flags & TF_kernel_mode )
- v->arch.pv_vcpu.gs_base_kernel = __rdgsbase();
- else
- v->arch.pv_vcpu.gs_base_user = __rdgsbase();
- }
- v->arch.flags ^= TF_kernel_mode;
- asm volatile ( "swapgs" );
- update_cr3(v);
- /* Don't flush user global mappings from the TLB. Don't tick TLB clock. */
- asm volatile ( "mov %0, %%cr3" : : "r" (v->arch.cr3) : "memory" );
-
- if ( !(v->arch.flags & TF_kernel_mode) )
- return;
-
- if ( v->arch.pv_vcpu.need_update_runstate_area &&
- update_runstate_area(v) )
- v->arch.pv_vcpu.need_update_runstate_area = 0;
-
- if ( v->arch.pv_vcpu.pending_system_time.version &&
- update_secondary_system_time(v,
- &v->arch.pv_vcpu.pending_system_time) )
- v->arch.pv_vcpu.pending_system_time.version = 0;
-}
-
-unsigned long do_iret(void)
-{
- struct cpu_user_regs *regs = guest_cpu_user_regs();
- struct iret_context iret_saved;
- struct vcpu *v = current;
-
- if ( unlikely(copy_from_user(&iret_saved, (void *)regs->rsp,
- sizeof(iret_saved))) )
- {
- gprintk(XENLOG_ERR,
- "Fault while reading IRET context from guest stack\n");
- goto exit_and_crash;
- }
-
- /* Returning to user mode? */
- if ( (iret_saved.cs & 3) == 3 )
- {
- if ( unlikely(pagetable_is_null(v->arch.guest_table_user)) )
- {
- gprintk(XENLOG_ERR,
- "Guest switching to user mode with no user page tables\n");
- goto exit_and_crash;
- }
- toggle_guest_mode(v);
- }
-
- if ( VM_ASSIST(v->domain, architectural_iopl) )
- v->arch.pv_vcpu.iopl = iret_saved.rflags & X86_EFLAGS_IOPL;
-
- regs->rip = iret_saved.rip;
- regs->cs = iret_saved.cs | 3; /* force guest privilege */
- regs->rflags = ((iret_saved.rflags & ~(X86_EFLAGS_IOPL|X86_EFLAGS_VM))
- | X86_EFLAGS_IF);
- regs->rsp = iret_saved.rsp;
- regs->ss = iret_saved.ss | 3; /* force guest privilege */
-
- if ( !(iret_saved.flags & VGCF_in_syscall) )
- {
- regs->entry_vector &= ~TRAP_syscall;
- regs->r11 = iret_saved.r11;
- regs->rcx = iret_saved.rcx;
- }
-
- /* Restore upcall mask from supplied EFLAGS.IF. */
- vcpu_info(v, evtchn_upcall_mask) = !(iret_saved.rflags & X86_EFLAGS_IF);
-
- async_exception_cleanup(v);
-
- /* Saved %rax gets written back to regs->rax in entry.S. */
- return iret_saved.rax;
-
- exit_and_crash:
- domain_crash(v->domain);
- return 0;
-}
-
-static unsigned int write_stub_trampoline(
- unsigned char *stub, unsigned long stub_va,
- unsigned long stack_bottom, unsigned long target_va)
-{
- /* movabsq %rax, stack_bottom - 8 */
- stub[0] = 0x48;
- stub[1] = 0xa3;
- *(uint64_t *)&stub[2] = stack_bottom - 8;
-
- /* movq %rsp, %rax */
- stub[10] = 0x48;
- stub[11] = 0x89;
- stub[12] = 0xe0;
-
- /* movabsq $stack_bottom - 8, %rsp */
- stub[13] = 0x48;
- stub[14] = 0xbc;
- *(uint64_t *)&stub[15] = stack_bottom - 8;
-
- /* pushq %rax */
- stub[23] = 0x50;
-
- /* jmp target_va */
- stub[24] = 0xe9;
- *(int32_t *)&stub[25] = target_va - (stub_va + 29);
-
- /* Round up to a multiple of 16 bytes. */
- return 32;
-}
-
-DEFINE_PER_CPU(struct stubs, stubs);
-void lstar_enter(void);
-void cstar_enter(void);
-
-void subarch_percpu_traps_init(void)
-{
- unsigned long stack_bottom = get_stack_bottom();
- unsigned long stub_va = this_cpu(stubs.addr);
- unsigned char *stub_page;
- unsigned int offset;
-
- /* IST_MAX IST pages + 1 syscall page + 1 guard page + primary stack. */
- BUILD_BUG_ON((IST_MAX + 2) * PAGE_SIZE + PRIMARY_STACK_SIZE > STACK_SIZE);
-
- stub_page = map_domain_page(_mfn(this_cpu(stubs.mfn)));
-
- /*
- * Trampoline for SYSCALL entry from 64-bit mode. The VT-x HVM vcpu
- * context switch logic relies on the SYSCALL trampoline being at the
- * start of the stubs.
- */
- wrmsrl(MSR_LSTAR, stub_va);
- offset = write_stub_trampoline(stub_page + (stub_va & ~PAGE_MASK),
- stub_va, stack_bottom,
- (unsigned long)lstar_enter);
- stub_va += offset;
-
- if ( boot_cpu_data.x86_vendor == X86_VENDOR_INTEL ||
- boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR )
- {
- /* SYSENTER entry. */
- wrmsrl(MSR_IA32_SYSENTER_ESP, stack_bottom);
- wrmsrl(MSR_IA32_SYSENTER_EIP, (unsigned long)sysenter_entry);
- wrmsr(MSR_IA32_SYSENTER_CS, __HYPERVISOR_CS, 0);
- }
-
- /* Trampoline for SYSCALL entry from compatibility mode. */
- wrmsrl(MSR_CSTAR, stub_va);
- offset += write_stub_trampoline(stub_page + (stub_va & ~PAGE_MASK),
- stub_va, stack_bottom,
- (unsigned long)cstar_enter);
-
- /* Don't consume more than half of the stub space here. */
- ASSERT(offset <= STUB_BUF_SIZE / 2);
-
- unmap_domain_page(stub_page);
-
- /* Common SYSCALL parameters. */
- wrmsrl(MSR_STAR, XEN_MSR_STAR);
- wrmsrl(MSR_SYSCALL_MASK, XEN_SYSCALL_MASK);
-}
-
-void init_int80_direct_trap(struct vcpu *v)
-{
- struct trap_info *ti = &v->arch.pv_vcpu.trap_ctxt[0x80];
- struct trap_bounce *tb = &v->arch.pv_vcpu.int80_bounce;
-
- tb->flags = TBF_EXCEPTION;
- tb->cs = ti->cs;
- tb->eip = ti->address;
-
- if ( null_trap_bounce(v, tb) )
- tb->flags = 0;
-}
-
-static long register_guest_callback(struct callback_register *reg)
-{
- long ret = 0;
- struct vcpu *v = current;
-
- if ( !is_canonical_address(reg->address) )
- return -EINVAL;
-
- switch ( reg->type )
- {
- case CALLBACKTYPE_event:
- v->arch.pv_vcpu.event_callback_eip = reg->address;
- break;
-
- case CALLBACKTYPE_failsafe:
- v->arch.pv_vcpu.failsafe_callback_eip = reg->address;
- if ( reg->flags & CALLBACKF_mask_events )
- set_bit(_VGCF_failsafe_disables_events,
- &v->arch.vgc_flags);
- else
- clear_bit(_VGCF_failsafe_disables_events,
- &v->arch.vgc_flags);
- break;
-
- case CALLBACKTYPE_syscall:
- v->arch.pv_vcpu.syscall_callback_eip = reg->address;
- if ( reg->flags & CALLBACKF_mask_events )
- set_bit(_VGCF_syscall_disables_events,
- &v->arch.vgc_flags);
- else
- clear_bit(_VGCF_syscall_disables_events,
- &v->arch.vgc_flags);
- break;
-
- case CALLBACKTYPE_syscall32:
- v->arch.pv_vcpu.syscall32_callback_eip = reg->address;
- v->arch.pv_vcpu.syscall32_disables_events =
- !!(reg->flags & CALLBACKF_mask_events);
- break;
-
- case CALLBACKTYPE_sysenter:
- v->arch.pv_vcpu.sysenter_callback_eip = reg->address;
- v->arch.pv_vcpu.sysenter_disables_events =
- !!(reg->flags & CALLBACKF_mask_events);
- break;
-
- case CALLBACKTYPE_nmi:
- ret = register_guest_nmi_callback(reg->address);
- break;
-
- default:
- ret = -ENOSYS;
- break;
- }
-
- return ret;
-}
-
-static long unregister_guest_callback(struct callback_unregister *unreg)
-{
- long ret;
-
- switch ( unreg->type )
- {
- case CALLBACKTYPE_event:
- case CALLBACKTYPE_failsafe:
- case CALLBACKTYPE_syscall:
- case CALLBACKTYPE_syscall32:
- case CALLBACKTYPE_sysenter:
- ret = -EINVAL;
- break;
-
- case CALLBACKTYPE_nmi:
- ret = unregister_guest_nmi_callback();
- break;
-
- default:
- ret = -ENOSYS;
- break;
- }
-
- return ret;
-}
-
-
-long do_callback_op(int cmd, XEN_GUEST_HANDLE_PARAM(const_void) arg)
-{
- long ret;
-
- switch ( cmd )
- {
- case CALLBACKOP_register:
- {
- struct callback_register reg;
-
- ret = -EFAULT;
- if ( copy_from_guest(®, arg, 1) )
- break;
-
- ret = register_guest_callback(®);
- }
- break;
-
- case CALLBACKOP_unregister:
- {
- struct callback_unregister unreg;
-
- ret = -EFAULT;
- if ( copy_from_guest(&unreg, arg, 1) )
- break;
-
- ret = unregister_guest_callback(&unreg);
- }
- break;
-
- default:
- ret = -ENOSYS;
- break;
- }
-
- return ret;
-}
-
-long do_set_callbacks(unsigned long event_address,
- unsigned long failsafe_address,
- unsigned long syscall_address)
-{
- struct callback_register event = {
- .type = CALLBACKTYPE_event,
- .address = event_address,
- };
- struct callback_register failsafe = {
- .type = CALLBACKTYPE_failsafe,
- .address = failsafe_address,
- };
- struct callback_register syscall = {
- .type = CALLBACKTYPE_syscall,
- .address = syscall_address,
- };
-
- register_guest_callback(&event);
- register_guest_callback(&failsafe);
- register_guest_callback(&syscall);
-
- return 0;
-}
-
-static void hypercall_page_initialise_ring3_kernel(void *hypercall_page)
-{
- char *p;
- int i;
-
- /* Fill in all the transfer points with template machine code. */
- for ( i = 0; i < (PAGE_SIZE / 32); i++ )
- {
- if ( i == __HYPERVISOR_iret )
- continue;
-
- p = (char *)(hypercall_page + (i * 32));
- *(u8 *)(p+ 0) = 0x51; /* push %rcx */
- *(u16 *)(p+ 1) = 0x5341; /* push %r11 */
- *(u8 *)(p+ 3) = 0xb8; /* mov $<i>,%eax */
- *(u32 *)(p+ 4) = i;
- *(u16 *)(p+ 8) = 0x050f; /* syscall */
- *(u16 *)(p+10) = 0x5b41; /* pop %r11 */
- *(u8 *)(p+12) = 0x59; /* pop %rcx */
- *(u8 *)(p+13) = 0xc3; /* ret */
- }
-
- /*
- * HYPERVISOR_iret is special because it doesn't return and expects a
- * special stack frame. Guests jump at this transfer point instead of
- * calling it.
- */
- p = (char *)(hypercall_page + (__HYPERVISOR_iret * 32));
- *(u8 *)(p+ 0) = 0x51; /* push %rcx */
- *(u16 *)(p+ 1) = 0x5341; /* push %r11 */
- *(u8 *)(p+ 3) = 0x50; /* push %rax */
- *(u8 *)(p+ 4) = 0xb8; /* mov $__HYPERVISOR_iret,%eax */
- *(u32 *)(p+ 5) = __HYPERVISOR_iret;
- *(u16 *)(p+ 9) = 0x050f; /* syscall */
-}
-
-#include "compat/traps.c"
-
-void hypercall_page_initialise(struct domain *d, void *hypercall_page)
-{
- memset(hypercall_page, 0xCC, PAGE_SIZE);
- if ( is_hvm_domain(d) )
- hvm_hypercall_page_initialise(d, hypercall_page);
- else if ( !is_pv_32bit_domain(d) )
- hypercall_page_initialise_ring3_kernel(hypercall_page);
- else
- hypercall_page_initialise_ring1_kernel(hypercall_page);
-}
-
/*
* Local variables:
* mode: C
--
2.11.0
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