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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Implement SVM specific part for Nested Virtualization
# HG changeset patch
# User cegger
# Date 1299670565 -3600
# Node ID a5e69b6fdd16a2c16d14afaad7025dfd794a44e1
# Parent a21d019bb8fe8535a0bbbf4d2ecf1adab4783dc8
Implement SVM specific part for Nested Virtualization
Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
Acked-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Committed-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
---
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/Makefile
--- a/xen/arch/x86/hvm/svm/Makefile Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/arch/x86/hvm/svm/Makefile Wed Mar 09 12:36:05 2011 +0100
@@ -2,6 +2,8 @@
obj-y += emulate.o
obj-bin-y += entry.o
obj-y += intr.o
+obj-y += nestedsvm.o
obj-y += svm.o
+obj-y += svmdebug.o
obj-y += vmcb.o
obj-y += vpmu.o
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/emulate.c
--- a/xen/arch/x86/hvm/svm/emulate.c Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/arch/x86/hvm/svm/emulate.c Wed Mar 09 12:36:05 2011 +0100
@@ -102,6 +102,11 @@
MAKE_INSTR(RDTSC, 2, 0x0f, 0x31);
MAKE_INSTR(PAUSE, 1, 0x90);
MAKE_INSTR(XSETBV, 3, 0x0f, 0x01, 0xd1);
+MAKE_INSTR(VMRUN, 3, 0x0f, 0x01, 0xd8);
+MAKE_INSTR(VMLOAD, 3, 0x0f, 0x01, 0xda);
+MAKE_INSTR(VMSAVE, 3, 0x0f, 0x01, 0xdb);
+MAKE_INSTR(STGI, 3, 0x0f, 0x01, 0xdc);
+MAKE_INSTR(CLGI, 3, 0x0f, 0x01, 0xdd);
static const u8 *opc_bytes[INSTR_MAX_COUNT] =
{
@@ -116,6 +121,11 @@
[INSTR_RDTSC] = OPCODE_RDTSC,
[INSTR_PAUSE] = OPCODE_PAUSE,
[INSTR_XSETBV] = OPCODE_XSETBV,
+ [INSTR_VMRUN] = OPCODE_VMRUN,
+ [INSTR_VMLOAD] = OPCODE_VMLOAD,
+ [INSTR_VMSAVE] = OPCODE_VMSAVE,
+ [INSTR_STGI] = OPCODE_STGI,
+ [INSTR_CLGI] = OPCODE_CLGI,
};
static int fetch(struct vcpu *v, u8 *buf, unsigned long addr, int len)
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/entry.S
--- a/xen/arch/x86/hvm/svm/entry.S Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/arch/x86/hvm/svm/entry.S Wed Mar 09 12:36:05 2011 +0100
@@ -54,6 +54,7 @@
ENTRY(svm_asm_do_resume)
call svm_intr_assist
+ call_with_regs(nsvm_vcpu_switch)
get_current(bx)
CLGI
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/nestedsvm.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c Wed Mar 09 12:36:05 2011 +0100
@@ -0,0 +1,1279 @@
+/*
+ * nestedsvm.c: Nested Virtualization
+ * Copyright (c) 2011, Advanced Micro Devices, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+
+#include <asm/hvm/support.h>
+#include <asm/hvm/svm/emulate.h>
+#include <asm/hvm/svm/svm.h>
+#include <asm/hvm/svm/vmcb.h>
+#include <asm/hvm/nestedhvm.h>
+#include <asm/hvm/svm/nestedsvm.h>
+#include <asm/hvm/svm/svmdebug.h>
+#include <asm/paging.h> /* paging_mode_hap */
+
+static int
+nestedsvm_vmcb_isvalid(struct vcpu *v, uint64_t vmcxaddr)
+{
+ if ( !hvm_svm_enabled(v) || hvm_guest_x86_mode(v) < 2 )
+ return 0;
+
+ /* Maximum valid physical address.
+ * See AMD BKDG for HSAVE_PA MSR.
+ */
+ if ( vmcxaddr > 0xfd00000000ULL )
+ return 0;
+
+ return 1;
+}
+
+int nestedsvm_vmcb_map(struct vcpu *v, uint64_t vmcbaddr)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+
+ if (nv->nv_vvmcx != NULL && nv->nv_vvmcxaddr != vmcbaddr) {
+ ASSERT(nv->nv_vvmcx != NULL);
+ ASSERT(nv->nv_vvmcxaddr != VMCX_EADDR);
+ hvm_unmap_guest_frame(nv->nv_vvmcx);
+ nv->nv_vvmcx = NULL;
+ nv->nv_vvmcxaddr = VMCX_EADDR;
+ }
+
+ if (nv->nv_vvmcx == NULL) {
+ nv->nv_vvmcx = hvm_map_guest_frame_rw(vmcbaddr >> PAGE_SHIFT);
+ if (nv->nv_vvmcx == NULL)
+ return 0;
+ nv->nv_vvmcxaddr = vmcbaddr;
+ }
+
+ return 1;
+}
+
+/* Interface methods */
+int nsvm_vcpu_initialise(struct vcpu *v)
+{
+ void *msrpm;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+
+ msrpm = alloc_xenheap_pages(get_order_from_bytes(MSRPM_SIZE), 0);
+ svm->ns_cached_msrpm = msrpm;
+ if (msrpm == NULL)
+ goto err;
+ memset(msrpm, 0x0, MSRPM_SIZE);
+
+ msrpm = alloc_xenheap_pages(get_order_from_bytes(MSRPM_SIZE), 0);
+ svm->ns_merged_msrpm = msrpm;
+ if (msrpm == NULL)
+ goto err;
+ memset(msrpm, 0x0, MSRPM_SIZE);
+
+ nv->nv_n2vmcx = alloc_vmcb();
+ if (nv->nv_n2vmcx == NULL)
+ goto err;
+ nv->nv_n2vmcx_pa = virt_to_maddr(nv->nv_n2vmcx);
+
+ return 0;
+
+err:
+ nsvm_vcpu_destroy(v);
+ return -ENOMEM;
+}
+
+int nsvm_vcpu_destroy(struct vcpu *v)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+
+ if (svm->ns_cached_msrpm) {
+ free_xenheap_pages(svm->ns_cached_msrpm,
+ get_order_from_bytes(MSRPM_SIZE));
+ svm->ns_cached_msrpm = NULL;
+ }
+ if (svm->ns_merged_msrpm) {
+ free_xenheap_pages(svm->ns_merged_msrpm,
+ get_order_from_bytes(MSRPM_SIZE));
+ svm->ns_merged_msrpm = NULL;
+ }
+ if (nv->nv_n2vmcx) {
+ free_vmcb(nv->nv_n2vmcx);
+ nv->nv_n2vmcx = NULL;
+ nv->nv_n2vmcx_pa = VMCX_EADDR;
+ }
+ if (svm->ns_iomap)
+ svm->ns_iomap = NULL;
+
+ return 0;
+}
+
+int nsvm_vcpu_reset(struct vcpu *v)
+{
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+
+ svm->ns_msr_hsavepa = VMCX_EADDR;
+ svm->ns_ovvmcb_pa = VMCX_EADDR;
+
+ svm->ns_cr_intercepts = 0;
+ svm->ns_dr_intercepts = 0;
+ svm->ns_exception_intercepts = 0;
+ svm->ns_general1_intercepts = 0;
+ svm->ns_general2_intercepts = 0;
+ svm->ns_lbr_control.bytes = 0;
+
+ svm->ns_hap_enabled = 0;
+ svm->ns_vmcb_guestcr3 = 0;
+ svm->ns_vmcb_hostcr3 = 0;
+ svm->ns_guest_asid = 0;
+ svm->ns_hostflags.bytes = 0;
+ svm->ns_vmexit.exitinfo1 = 0;
+ svm->ns_vmexit.exitinfo2 = 0;
+
+ if (svm->ns_iomap)
+ svm->ns_iomap = NULL;
+
+ return 0;
+}
+
+static int nsvm_vcpu_hostsave(struct vcpu *v, unsigned int inst_len)
+{
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct vmcb_struct *n1vmcb;
+
+ n1vmcb = nv->nv_n1vmcx;
+ ASSERT(n1vmcb != NULL);
+
+ n1vmcb->rip += inst_len;
+
+ /* Remember the host interrupt flag */
+ svm->ns_hostflags.fields.rflagsif =
+ (n1vmcb->rflags & X86_EFLAGS_IF) ? 1 : 0;
+
+ return 0;
+}
+
+int nsvm_vcpu_hostrestore(struct vcpu *v, struct cpu_user_regs *regs)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct vmcb_struct *n1vmcb, *n2vmcb;
+ int rc;
+
+ n1vmcb = nv->nv_n1vmcx;
+ n2vmcb = nv->nv_n2vmcx;
+ ASSERT(n1vmcb != NULL);
+ ASSERT(n2vmcb != NULL);
+
+ /* nsvm_vmcb_prepare4vmexit() already saved register values
+ * handled by VMSAVE/VMLOAD into n1vmcb directly.
+ */
+
+ /* switch vmcb to l1 guest's vmcb */
+ v->arch.hvm_svm.vmcb = n1vmcb;
+ v->arch.hvm_svm.vmcb_pa = nv->nv_n1vmcx_pa;
+
+ /* EFER */
+ v->arch.hvm_vcpu.guest_efer = n1vmcb->_efer;
+ rc = hvm_set_efer(n1vmcb->_efer);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_efer failed, rc: %u\n", rc);
+
+ /* CR4 */
+ v->arch.hvm_vcpu.guest_cr[4] = n1vmcb->_cr4;
+ rc = hvm_set_cr4(n1vmcb->_cr4);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr4 failed, rc: %u\n", rc);
+
+ /* CR0 */
+ v->arch.hvm_vcpu.guest_cr[0] = n1vmcb->_cr0 | X86_CR0_PE;
+ n1vmcb->rflags &= ~X86_EFLAGS_VM;
+ rc = hvm_set_cr0(n1vmcb->_cr0 | X86_CR0_PE);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr0 failed, rc: %u\n", rc);
+
+ /* CR2 */
+ v->arch.hvm_vcpu.guest_cr[2] = n1vmcb->_cr2;
+ hvm_update_guest_cr(v, 2);
+
+ /* CR3 */
+ /* Nested paging mode */
+ if (nestedhvm_paging_mode_hap(v)) {
+ /* host nested paging + guest nested paging. */
+ /* hvm_set_cr3() below sets v->arch.hvm_vcpu.guest_cr[3] for us. */
+ } else if (paging_mode_hap(v->domain)) {
+ /* host nested paging + guest shadow paging. */
+ /* hvm_set_cr3() below sets v->arch.hvm_vcpu.guest_cr[3] for us. */
+ } else {
+ /* host shadow paging + guest shadow paging. */
+
+ /* Reset MMU context -- XXX (hostrestore) not yet working*/
+ if (!pagetable_is_null(v->arch.guest_table))
+ put_page(pagetable_get_page(v->arch.guest_table));
+ v->arch.guest_table = pagetable_null();
+ /* hvm_set_cr3() below sets v->arch.hvm_vcpu.guest_cr[3] for us. */
+ }
+ rc = hvm_set_cr3(n1vmcb->_cr3);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr3 failed, rc: %u\n", rc);
+
+ regs->eax = n1vmcb->rax;
+ regs->esp = n1vmcb->rsp;
+ regs->eip = n1vmcb->rip;
+ regs->eflags = n1vmcb->rflags;
+ n1vmcb->_dr7 = 0; /* disable all breakpoints */
+ n1vmcb->_cpl = 0;
+
+ /* Clear exitintinfo to prevent a fault loop of re-injecting
+ * exceptions forever.
+ */
+ n1vmcb->exitintinfo.bytes = 0;
+
+ /* Cleanbits */
+ n1vmcb->cleanbits.bytes = 0;
+
+ hvm_asid_flush_vcpu(v);
+
+ return 0;
+}
+
+static int nsvm_vmrun_permissionmap(struct vcpu *v, bool_t viopm)
+{
+ struct arch_svm_struct *arch_svm = &v->arch.hvm_svm;
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct vmcb_struct *ns_vmcb = nv->nv_vvmcx;
+ struct vmcb_struct *host_vmcb = arch_svm->vmcb;
+ unsigned long *ns_msrpm_ptr;
+ unsigned int i;
+ enum hvm_copy_result ret;
+ unsigned long *ns_viomap;
+ bool_t ioport_80, ioport_ed;
+
+ ns_msrpm_ptr = (unsigned long *)svm->ns_cached_msrpm;
+
+ ret = hvm_copy_from_guest_phys(svm->ns_cached_msrpm,
+ ns_vmcb->_msrpm_base_pa, MSRPM_SIZE);
+ if (ret != HVMCOPY_okay) {
+ gdprintk(XENLOG_ERR, "hvm_copy_from_guest_phys msrpm %u\n", ret);
+ return 1;
+ }
+
+ /* Check l1 guest io permission map and get a shadow one based on
+ * if l1 guest intercepts io ports 0x80 and/or 0xED.
+ */
+ svm->ns_oiomap_pa = svm->ns_iomap_pa;
+ svm->ns_iomap_pa = ns_vmcb->_iopm_base_pa;
+
+ ns_viomap = hvm_map_guest_frame_ro(svm->ns_iomap_pa >> PAGE_SHIFT);
+ ASSERT(ns_viomap != NULL);
+ ioport_80 = test_bit(0x80, ns_viomap);
+ ioport_ed = test_bit(0xed, ns_viomap);
+ hvm_unmap_guest_frame(ns_viomap);
+
+ svm->ns_iomap = nestedhvm_vcpu_iomap_get(ioport_80, ioport_ed);
+
+ nv->nv_ioport80 = ioport_80;
+ nv->nv_ioportED = ioport_ed;
+
+ /* v->arch.hvm_svm.msrpm has type unsigned long, thus
+ * BYTES_PER_LONG.
+ */
+ for (i = 0; i < MSRPM_SIZE / BYTES_PER_LONG; i++)
+ svm->ns_merged_msrpm[i] = arch_svm->msrpm[i] | ns_msrpm_ptr[i];
+
+ host_vmcb->_iopm_base_pa =
+ (uint64_t)virt_to_maddr(svm->ns_iomap);
+ host_vmcb->_msrpm_base_pa =
+ (uint64_t)virt_to_maddr(svm->ns_merged_msrpm);
+
+ return 0;
+}
+
+static int nsvm_vmcb_prepare4vmrun(struct vcpu *v, struct cpu_user_regs *regs)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct vmcb_struct *ns_vmcb, *n1vmcb, *n2vmcb;
+ bool_t vcleanbits_valid;
+ int rc;
+
+ ns_vmcb = nv->nv_vvmcx;
+ n1vmcb = nv->nv_n1vmcx;
+ n2vmcb = nv->nv_n2vmcx;
+ ASSERT(ns_vmcb != NULL);
+ ASSERT(n1vmcb != NULL);
+ ASSERT(n2vmcb != NULL);
+
+ /* Check if virtual VMCB cleanbits are valid */
+ vcleanbits_valid = 1;
+ if (svm->ns_ovvmcb_pa == VMCX_EADDR)
+ vcleanbits_valid = 0;
+ if (svm->ns_ovvmcb_pa != nv->nv_vvmcxaddr)
+ vcleanbits_valid = 0;
+
+#define vcleanbit_set(_name) \
+ (vcleanbits_valid && ns_vmcb->cleanbits.fields._name)
+
+ /* Enable l2 guest intercepts */
+ if (!vcleanbit_set(intercepts)) {
+ svm->ns_cr_intercepts = ns_vmcb->_cr_intercepts;
+ svm->ns_dr_intercepts = ns_vmcb->_dr_intercepts;
+ svm->ns_exception_intercepts = ns_vmcb->_exception_intercepts;
+ svm->ns_general1_intercepts = ns_vmcb->_general1_intercepts;
+ svm->ns_general2_intercepts = ns_vmcb->_general2_intercepts;
+ }
+
+ /* We could track the cleanbits of the n1vmcb from
+ * last emulated #VMEXIT to this emulated VMRUN to safe the merges
+ * below. Those cleanbits would be tracked in an integer field
+ * in struct nestedsvm.
+ * But this effort is not worth doing because:
+ * - Only the intercepts bit of the n1vmcb can effectively be used here
+ * - The CPU runs more instructions for the tracking than can be
+ * safed here.
+ * The overhead comes from (ordered from highest to lowest):
+ * - svm_ctxt_switch_to (CPU context switching)
+ * - svm_fpu_enter, svm_fpu_leave (lazy FPU switching)
+ * - emulated CLGI (clears VINTR intercept)
+ * - host clears VINTR intercept
+ * Test results show that the overhead is high enough that the
+ * tracked intercepts bit of the n1vmcb is practically *always* cleared.
+ */
+
+ n2vmcb->_cr_intercepts =
+ n1vmcb->_cr_intercepts | ns_vmcb->_cr_intercepts;
+ n2vmcb->_dr_intercepts =
+ n1vmcb->_dr_intercepts | ns_vmcb->_dr_intercepts;
+ n2vmcb->_exception_intercepts =
+ n1vmcb->_exception_intercepts | ns_vmcb->_exception_intercepts;
+ n2vmcb->_general1_intercepts =
+ n1vmcb->_general1_intercepts | ns_vmcb->_general1_intercepts;
+ n2vmcb->_general2_intercepts =
+ n1vmcb->_general2_intercepts | ns_vmcb->_general2_intercepts;
+
+ /* Nested Pause Filter */
+ if (ns_vmcb->_general1_intercepts & GENERAL1_INTERCEPT_PAUSE)
+ n2vmcb->_pause_filter_count =
+ min(n1vmcb->_pause_filter_count, ns_vmcb->_pause_filter_count);
+ else
+ n2vmcb->_pause_filter_count = n1vmcb->_pause_filter_count;
+
+ /* TSC offset */
+ n2vmcb->_tsc_offset = n1vmcb->_tsc_offset + ns_vmcb->_tsc_offset;
+
+ /* Nested IO permission bitmaps */
+ rc = nsvm_vmrun_permissionmap(v, vcleanbit_set(iopm));
+ if (rc)
+ return rc;
+
+ /* ASID */
+ hvm_asid_flush_vcpu(v);
+ /* n2vmcb->_guest_asid = ns_vmcb->_guest_asid; */
+
+ /* TLB control */
+ n2vmcb->tlb_control = n1vmcb->tlb_control | ns_vmcb->tlb_control;
+
+ /* Virtual Interrupts */
+ if (!vcleanbit_set(tpr)) {
+ n2vmcb->_vintr = ns_vmcb->_vintr;
+ n2vmcb->_vintr.fields.intr_masking = 1;
+ }
+
+ /* Shadow Mode */
+ n2vmcb->interrupt_shadow = ns_vmcb->interrupt_shadow;
+
+ /* Exit codes */
+ n2vmcb->exitcode = ns_vmcb->exitcode;
+ n2vmcb->exitinfo1 = ns_vmcb->exitinfo1;
+ n2vmcb->exitinfo2 = ns_vmcb->exitinfo2;
+ n2vmcb->exitintinfo = ns_vmcb->exitintinfo;
+
+ /* Pending Interrupts */
+ n2vmcb->eventinj = ns_vmcb->eventinj;
+
+ /* LBR virtualization */
+ if (!vcleanbit_set(lbr)) {
+ svm->ns_lbr_control = ns_vmcb->lbr_control;
+ }
+ n2vmcb->lbr_control.bytes =
+ n1vmcb->lbr_control.bytes | ns_vmcb->lbr_control.bytes;
+
+ /* NextRIP */
+ n2vmcb->nextrip = ns_vmcb->nextrip;
+
+ /*
+ * VMCB Save State Area
+ */
+
+ /* Segments */
+ if (!vcleanbit_set(seg)) {
+ n2vmcb->es = ns_vmcb->es;
+ n2vmcb->cs = ns_vmcb->cs;
+ n2vmcb->ss = ns_vmcb->ss;
+ n2vmcb->ds = ns_vmcb->ds;
+ /* CPL */
+ n2vmcb->_cpl = ns_vmcb->_cpl;
+ }
+ if (!vcleanbit_set(dt)) {
+ n2vmcb->gdtr = ns_vmcb->gdtr;
+ n2vmcb->idtr = ns_vmcb->idtr;
+ }
+
+ /* EFER */
+ v->arch.hvm_vcpu.guest_efer = ns_vmcb->_efer;
+ rc = hvm_set_efer(ns_vmcb->_efer);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_efer failed, rc: %u\n", rc);
+
+ /* CR4 */
+ v->arch.hvm_vcpu.guest_cr[4] = ns_vmcb->_cr4;
+ rc = hvm_set_cr4(ns_vmcb->_cr4);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr4 failed, rc: %u\n", rc);
+
+ /* CR0 */
+ v->arch.hvm_vcpu.guest_cr[0] = ns_vmcb->_cr0;
+ rc = hvm_set_cr0(ns_vmcb->_cr0);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr0 failed, rc: %u\n", rc);
+
+ /* CR2 */
+ v->arch.hvm_vcpu.guest_cr[2] = ns_vmcb->_cr2;
+ hvm_update_guest_cr(v, 2);
+
+ /* Nested paging mode */
+ if (nestedhvm_paging_mode_hap(v)) {
+ /* host nested paging + guest nested paging. */
+
+ /* hvm_set_cr3() below sets v->arch.hvm_vcpu.guest_cr[3] for us. */
+ rc = hvm_set_cr3(ns_vmcb->_cr3);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr3 failed, rc: %u\n", rc);
+ } else if (paging_mode_hap(v->domain)) {
+ /* host nested paging + guest shadow paging. */
+ n2vmcb->_np_enable = 1;
+ /* Keep h_cr3 as it is. */
+ /* When l1 guest does shadow paging
+ * we assume it intercepts page faults.
+ */
+ /* hvm_set_cr3() below sets v->arch.hvm_vcpu.guest_cr[3] for us. */
+ rc = hvm_set_cr3(ns_vmcb->_cr3);
+ if (rc != X86EMUL_OKAY)
+ gdprintk(XENLOG_ERR, "hvm_set_cr3 failed, rc: %u\n", rc);
+ } else {
+ /* host shadow paging + guest shadow paging. */
+ n2vmcb->_np_enable = 0;
+ n2vmcb->_h_cr3 = 0x0;
+
+ /* TODO: Once shadow-shadow paging is in place come back to here
+ * and set host_vmcb->_cr3 to the shadowed shadow table.
+ */
+ }
+
+ /* DRn */
+ if (!vcleanbit_set(dr)) {
+ n2vmcb->_dr7 = ns_vmcb->_dr7;
+ n2vmcb->_dr6 = ns_vmcb->_dr6;
+ }
+
+ /* RFLAGS */
+ n2vmcb->rflags = ns_vmcb->rflags;
+
+ /* RIP */
+ n2vmcb->rip = ns_vmcb->rip;
+
+ /* RSP */
+ n2vmcb->rsp = ns_vmcb->rsp;
+
+ /* RAX */
+ n2vmcb->rax = ns_vmcb->rax;
+
+ /* Keep the host values of the fs, gs, ldtr, tr, kerngsbase,
+ * star, lstar, cstar, sfmask, sysenter_cs, sysenter_esp,
+ * sysenter_eip. These are handled via VMSAVE/VMLOAD emulation.
+ */
+
+ /* Page tables */
+ n2vmcb->pdpe0 = ns_vmcb->pdpe0;
+ n2vmcb->pdpe1 = ns_vmcb->pdpe1;
+ n2vmcb->pdpe2 = ns_vmcb->pdpe2;
+ n2vmcb->pdpe3 = ns_vmcb->pdpe3;
+
+ /* PAT */
+ if (!vcleanbit_set(np)) {
+ n2vmcb->_g_pat = ns_vmcb->_g_pat;
+ }
+
+ if (!vcleanbit_set(lbr)) {
+ /* Debug Control MSR */
+ n2vmcb->_debugctlmsr = ns_vmcb->_debugctlmsr;
+
+ /* LBR MSRs */
+ n2vmcb->_lastbranchfromip = ns_vmcb->_lastbranchfromip;
+ n2vmcb->_lastbranchtoip = ns_vmcb->_lastbranchtoip;
+ n2vmcb->_lastintfromip = ns_vmcb->_lastintfromip;
+ n2vmcb->_lastinttoip = ns_vmcb->_lastinttoip;
+ }
+
+ /* Cleanbits */
+ n2vmcb->cleanbits.bytes = 0;
+
+ rc = svm_vmcb_isvalid(__func__, ns_vmcb, 1);
+ if (rc) {
+ gdprintk(XENLOG_ERR, "virtual vmcb invalid\n");
+ return rc;
+ }
+
+ rc = svm_vmcb_isvalid(__func__, n2vmcb, 1);
+ if (rc) {
+ gdprintk(XENLOG_ERR, "n2vmcb invalid\n");
+ return rc;
+ }
+
+ /* Switch guest registers to l2 guest */
+ regs->eax = ns_vmcb->rax;
+ regs->eip = ns_vmcb->rip;
+ regs->esp = ns_vmcb->rsp;
+ regs->eflags = ns_vmcb->rflags;
+
+#undef vcleanbit_set
+ return 0;
+}
+
+static int
+nsvm_vcpu_vmentry(struct vcpu *v, struct cpu_user_regs *regs,
+ unsigned int inst_len)
+{
+ int ret;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct vmcb_struct *ns_vmcb;
+
+ ns_vmcb = nv->nv_vvmcx;
+ ASSERT(ns_vmcb != NULL);
+ ASSERT(nv->nv_n2vmcx != NULL);
+ ASSERT(nv->nv_n2vmcx_pa != VMCX_EADDR);
+
+ /* Save values for later use. Needed for Nested-on-Nested and
+ * Shadow-on-Shadow paging.
+ */
+ svm->ns_vmcb_guestcr3 = ns_vmcb->_cr3;
+ svm->ns_vmcb_hostcr3 = ns_vmcb->_h_cr3;
+
+ nv->nv_flushp2m = (ns_vmcb->tlb_control
+ || (svm->ns_guest_asid != ns_vmcb->_guest_asid));
+ svm->ns_guest_asid = ns_vmcb->_guest_asid;
+
+ /* nested paging for the guest */
+ svm->ns_hap_enabled = (ns_vmcb->_np_enable) ? 1 : 0;
+
+ /* Remember the V_INTR_MASK in hostflags */
+ svm->ns_hostflags.fields.vintrmask =
+ (ns_vmcb->_vintr.fields.intr_masking) ? 1 : 0;
+
+ /* Save l1 guest state (= host state) */
+ ret = nsvm_vcpu_hostsave(v, inst_len);
+ if (ret) {
+ gdprintk(XENLOG_ERR, "hostsave failed, ret = %i\n", ret);
+ return ret;
+ }
+
+ /* switch vmcb to shadow vmcb */
+ v->arch.hvm_svm.vmcb = nv->nv_n2vmcx;
+ v->arch.hvm_svm.vmcb_pa = nv->nv_n2vmcx_pa;
+
+ ret = nsvm_vmcb_prepare4vmrun(v, regs);
+ if (ret) {
+ gdprintk(XENLOG_ERR, "prepare4vmrun failed, ret = %i\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int
+nsvm_vcpu_vmrun(struct vcpu *v, struct cpu_user_regs *regs)
+{
+ int ret;
+ unsigned int inst_len;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+
+ inst_len = __get_instruction_length(v, INSTR_VMRUN);
+ if (inst_len == 0) {
+ svm->ns_vmexit.exitcode = VMEXIT_SHUTDOWN;
+ return -1;
+ }
+
+ nv->nv_vmswitch_in_progress = 1;
+ ASSERT(nv->nv_vvmcx != NULL);
+
+ /* save host state */
+ ret = nsvm_vcpu_vmentry(v, regs, inst_len);
+ if (ret) {
+ gdprintk(XENLOG_ERR,
+ "nsvm_vcpu_vmentry failed, injecting #UD\n");
+ hvm_inject_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE, 0);
+ nv->nv_vmswitch_in_progress = 0;
+ return 1;
+ }
+
+ /* Switch vcpu to guest mode
+ */
+ nestedhvm_vcpu_enter_guestmode(v);
+ nv->nv_vmswitch_in_progress = 0;
+ return 0;
+}
+
+int
+nsvm_vcpu_vmexit_inject(struct vcpu *v, struct cpu_user_regs *regs,
+ uint64_t exitcode)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct vmcb_struct *ns_vmcb;
+
+ ns_vmcb = nv->nv_vvmcx;
+
+ if (nv->nv_vmexit_pending) {
+
+ switch (exitcode) {
+ case VMEXIT_INTR:
+ if ( unlikely(ns_vmcb->eventinj.fields.v)
+ && nv->nv_vmentry_pending
+ && hvm_event_needs_reinjection(ns_vmcb->eventinj.fields.type,
+ ns_vmcb->eventinj.fields.vector) )
+ {
+ ns_vmcb->exitintinfo.bytes = ns_vmcb->eventinj.bytes;
+ }
+ break;
+ case VMEXIT_EXCEPTION_PF:
+ ns_vmcb->_cr2 = ns_vmcb->exitinfo2;
+ /* fall through */
+ case VMEXIT_NPF:
+ /* PF error code */
+ ns_vmcb->exitinfo1 = svm->ns_vmexit.exitinfo1;
+ /* fault address */
+ ns_vmcb->exitinfo2 = svm->ns_vmexit.exitinfo2;
+ break;
+ case VMEXIT_EXCEPTION_NP:
+ case VMEXIT_EXCEPTION_SS:
+ case VMEXIT_EXCEPTION_GP:
+ case VMEXIT_EXCEPTION_15:
+ case VMEXIT_EXCEPTION_MF:
+ case VMEXIT_EXCEPTION_AC:
+ ns_vmcb->exitinfo1 = svm->ns_vmexit.exitinfo1;
+ break;
+ default:
+ break;
+ }
+ }
+
+ ns_vmcb->exitcode = exitcode;
+ ns_vmcb->eventinj.bytes = 0;
+ return 0;
+}
+
+int
+nsvm_vcpu_vmexit_trap(struct vcpu *v, unsigned int trapnr,
+ int errcode, unsigned long cr2)
+{
+ ASSERT(vcpu_nestedhvm(v).nv_vvmcx != NULL);
+
+ nestedsvm_vmexit_defer(v, VMEXIT_EXCEPTION_DE + trapnr, errcode, cr2);
+ return NESTEDHVM_VMEXIT_DONE;
+}
+
+uint64_t nsvm_vcpu_guestcr3(struct vcpu *v)
+{
+ return vcpu_nestedsvm(v).ns_vmcb_guestcr3;
+}
+
+uint64_t nsvm_vcpu_hostcr3(struct vcpu *v)
+{
+ return vcpu_nestedsvm(v).ns_vmcb_hostcr3;
+}
+
+uint32_t nsvm_vcpu_asid(struct vcpu *v)
+{
+ return vcpu_nestedsvm(v).ns_guest_asid;
+}
+
+static int
+nsvm_vmcb_guest_intercepts_msr(unsigned long *msr_bitmap,
+ uint32_t msr, bool_t write)
+{
+ bool_t enabled;
+ unsigned long *msr_bit;
+
+ msr_bit = svm_msrbit(msr_bitmap, msr);
+
+ if (msr_bit == NULL)
+ /* MSR not in the permission map: Let the guest handle it. */
+ return NESTEDHVM_VMEXIT_INJECT;
+
+ BUG_ON(msr_bit == NULL);
+ msr &= 0x1fff;
+
+ if (write)
+ /* write access */
+ enabled = test_bit(msr * 2 + 1, msr_bit);
+ else
+ /* read access */
+ enabled = test_bit(msr * 2, msr_bit);
+
+ if (!enabled)
+ return NESTEDHVM_VMEXIT_HOST;
+
+ return NESTEDHVM_VMEXIT_INJECT;
+}
+
+static int
+nsvm_vmcb_guest_intercepts_ioio(paddr_t iopm_pa, uint64_t exitinfo1)
+{
+ unsigned long iopm_gfn = iopm_pa >> PAGE_SHIFT;
+ unsigned long *io_bitmap = NULL;
+ ioio_info_t ioinfo;
+ uint16_t port;
+ bool_t enabled;
+
+ ioinfo.bytes = exitinfo1;
+ port = ioinfo.fields.port;
+
+ switch (port) {
+ case 0 ... 32767: /* first 4KB page */
+ io_bitmap = hvm_map_guest_frame_ro(iopm_gfn);
+ break;
+ case 32768 ... 65535: /* second 4KB page */
+ port -= 32768;
+ io_bitmap = hvm_map_guest_frame_ro(iopm_gfn+1);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ if (io_bitmap == NULL) {
+ gdprintk(XENLOG_ERR,
+ "IOIO intercept: mapping of permission map failed\n");
+ return NESTEDHVM_VMEXIT_ERROR;
+ }
+
+ enabled = test_bit(port, io_bitmap);
+ hvm_unmap_guest_frame(io_bitmap);
+ if (!enabled)
+ return NESTEDHVM_VMEXIT_HOST;
+
+ return NESTEDHVM_VMEXIT_INJECT;
+}
+
+int
+nsvm_vmcb_guest_intercepts_exitcode(struct vcpu *v,
+ struct cpu_user_regs *regs, uint64_t exitcode)
+{
+ uint64_t exit_bits;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct vmcb_struct *ns_vmcb = nv->nv_vvmcx;
+ enum nestedhvm_vmexits vmexits;
+
+ switch (exitcode) {
+ case VMEXIT_CR0_READ ... VMEXIT_CR15_READ:
+ case VMEXIT_CR0_WRITE ... VMEXIT_CR15_WRITE:
+ exit_bits = 1ULL << (exitcode - VMEXIT_CR0_READ);
+ if (svm->ns_cr_intercepts & exit_bits)
+ break;
+ return 0;
+
+ case VMEXIT_DR0_READ ... VMEXIT_DR7_READ:
+ case VMEXIT_DR0_WRITE ... VMEXIT_DR7_WRITE:
+ exit_bits = 1ULL << (exitcode - VMEXIT_DR0_READ);
+ if (svm->ns_dr_intercepts & exit_bits)
+ break;
+ return 0;
+
+ case VMEXIT_EXCEPTION_DE ... VMEXIT_EXCEPTION_XF:
+ exit_bits = 1ULL << (exitcode - VMEXIT_EXCEPTION_DE);
+ if (svm->ns_exception_intercepts & exit_bits)
+ break;
+ return 0;
+
+ case VMEXIT_INTR ... VMEXIT_SHUTDOWN:
+ exit_bits = 1ULL << (exitcode - VMEXIT_INTR);
+ if (svm->ns_general1_intercepts & exit_bits)
+ break;
+ return 0;
+
+ case VMEXIT_VMRUN ... VMEXIT_XSETBV:
+ exit_bits = 1ULL << (exitcode - VMEXIT_VMRUN);
+ if (svm->ns_general2_intercepts & exit_bits)
+ break;
+ return 0;
+
+ case VMEXIT_NPF:
+ case VMEXIT_INVALID:
+ /* Always intercepted */
+ break;
+
+ default:
+ gdprintk(XENLOG_ERR, "Illegal exitcode 0x%"PRIx64"\n", exitcode);
+ BUG();
+ break;
+ }
+
+ /* Special cases: Do more detailed checks */
+ switch (exitcode) {
+ case VMEXIT_MSR:
+ ASSERT(regs != NULL);
+ nestedsvm_vmcb_map(v, nv->nv_vvmcxaddr);
+ ASSERT(nv->nv_vvmcx != NULL);
+ ns_vmcb = nv->nv_vvmcx;
+ vmexits = nsvm_vmcb_guest_intercepts_msr(svm->ns_cached_msrpm,
+ regs->ecx, ns_vmcb->exitinfo1 != 0);
+ if (vmexits == NESTEDHVM_VMEXIT_HOST)
+ return 0;
+ break;
+ case VMEXIT_IOIO:
+ nestedsvm_vmcb_map(v, nv->nv_vvmcxaddr);
+ ASSERT(nv->nv_vvmcx != NULL);
+ ns_vmcb = nv->nv_vvmcx;
+ vmexits = nsvm_vmcb_guest_intercepts_ioio(ns_vmcb->_iopm_base_pa,
+ ns_vmcb->exitinfo1);
+ if (vmexits == NESTEDHVM_VMEXIT_HOST)
+ return 0;
+ break;
+ }
+
+ return 1;
+}
+
+int
+nsvm_vmcb_guest_intercepts_trap(struct vcpu *v, unsigned int trapnr)
+{
+ return nsvm_vmcb_guest_intercepts_exitcode(v,
+ guest_cpu_user_regs(), VMEXIT_EXCEPTION_DE + trapnr);
+}
+
+static int
+nsvm_vmcb_prepare4vmexit(struct vcpu *v)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ struct vmcb_struct *ns_vmcb = nv->nv_vvmcx;
+ struct vmcb_struct *n2vmcb = nv->nv_n2vmcx;
+
+ svm_vmsave(nv->nv_n1vmcx);
+
+ /* Cache guest physical address of virtual vmcb
+ * for VMCB Cleanbit emulation.
+ */
+ svm->ns_ovvmcb_pa = nv->nv_vvmcxaddr;
+
+ /* Intercepts - keep them as they are */
+
+ /* Pausefilter - keep it as is */
+
+ /* Nested IO permission bitmap */
+ /* Just keep the iopm_base_pa and msrpm_base_pa values.
+ * The guest must not see the virtualized values.
+ */
+
+ /* TSC offset */
+ /* Keep it. It's maintainted by the l1 guest. */
+
+ /* ASID */
+ /* ns_vmcb->_guest_asid = n2vmcb->_guest_asid; */
+
+ /* TLB control */
+ ns_vmcb->tlb_control = 0;
+
+ /* Virtual Interrupts */
+ ns_vmcb->_vintr = n2vmcb->_vintr;
+ if (!(svm->ns_hostflags.fields.vintrmask))
+ ns_vmcb->_vintr.fields.intr_masking = 0;
+
+ /* Shadow mode */
+ ns_vmcb->interrupt_shadow = n2vmcb->interrupt_shadow;
+
+ /* Exit codes */
+ ns_vmcb->exitcode = n2vmcb->exitcode;
+ ns_vmcb->exitinfo1 = n2vmcb->exitinfo1;
+ ns_vmcb->exitinfo2 = n2vmcb->exitinfo2;
+ ns_vmcb->exitintinfo = n2vmcb->exitintinfo;
+
+ /* Interrupts */
+ /* If we emulate a VMRUN/#VMEXIT in the same host #VMEXIT cycle we have
+ * to make sure that we do not lose injected events. So check eventinj
+ * here and copy it to exitintinfo if it is valid.
+ * exitintinfo and eventinj can't be both valid because the case below
+ * only happens on a VMRUN instruction intercept which has no valid
+ * exitintinfo set.
+ */
+ if ( unlikely(n2vmcb->eventinj.fields.v) &&
+ hvm_event_needs_reinjection(n2vmcb->eventinj.fields.type,
+ n2vmcb->eventinj.fields.vector) )
+ {
+ ns_vmcb->exitintinfo = n2vmcb->eventinj;
+ }
+
+ ns_vmcb->eventinj.bytes = 0;
+
+ /* Nested paging mode */
+ if (nestedhvm_paging_mode_hap(v)) {
+ /* host nested paging + guest nested paging. */
+ ns_vmcb->_np_enable = n2vmcb->_np_enable;
+ ns_vmcb->_cr3 = n2vmcb->_cr3;
+ /* The vmcb->h_cr3 is the shadowed h_cr3. The original
+ * unshadowed guest h_cr3 is kept in ns_vmcb->h_cr3,
+ * hence we keep the ns_vmcb->h_cr3 value. */
+ } else if (paging_mode_hap(v->domain)) {
+ /* host nested paging + guest shadow paging. */
+ ns_vmcb->_np_enable = 0;
+ /* Throw h_cr3 away. Guest is not allowed to set it or
+ * it can break out, otherwise (security hole!) */
+ ns_vmcb->_h_cr3 = 0x0;
+ /* Stop intercepting #PF (already done above
+ * by restoring cached intercepts). */
+ ns_vmcb->_cr3 = n2vmcb->_cr3;
+ } else {
+ /* host shadow paging + guest shadow paging. */
+ ns_vmcb->_np_enable = 0;
+ ns_vmcb->_h_cr3 = 0x0;
+ /* The vmcb->_cr3 is the shadowed cr3. The original
+ * unshadowed guest cr3 is kept in ns_vmcb->_cr3,
+ * hence we keep the ns_vmcb->_cr3 value. */
+ }
+
+ /* LBR virtualization - keep lbr control as is */
+
+ /* NextRIP */
+ ns_vmcb->nextrip = n2vmcb->nextrip;
+
+ /*
+ * VMCB Save State Area
+ */
+
+ /* Segments */
+ ns_vmcb->es = n2vmcb->es;
+ ns_vmcb->cs = n2vmcb->cs;
+ ns_vmcb->ss = n2vmcb->ss;
+ ns_vmcb->ds = n2vmcb->ds;
+ ns_vmcb->gdtr = n2vmcb->gdtr;
+ ns_vmcb->idtr = n2vmcb->idtr;
+
+ /* CPL */
+ ns_vmcb->_cpl = n2vmcb->_cpl;
+
+ /* EFER */
+ ns_vmcb->_efer = n2vmcb->_efer;
+
+ /* CRn */
+ ns_vmcb->_cr4 = n2vmcb->_cr4;
+ ns_vmcb->_cr0 = n2vmcb->_cr0;
+
+ /* DRn */
+ ns_vmcb->_dr7 = n2vmcb->_dr7;
+ ns_vmcb->_dr6 = n2vmcb->_dr6;
+
+ /* RFLAGS */
+ ns_vmcb->rflags = n2vmcb->rflags;
+
+ /* RIP */
+ ns_vmcb->rip = n2vmcb->rip;
+
+ /* RSP */
+ ns_vmcb->rsp = n2vmcb->rsp;
+
+ /* RAX */
+ ns_vmcb->rax = n2vmcb->rax;
+
+ /* Keep the l2 guest values of the fs, gs, ldtr, tr, kerngsbase,
+ * star, lstar, cstar, sfmask, sysenter_cs, sysenter_esp,
+ * sysenter_eip. These are handled via VMSAVE/VMLOAD emulation.
+ */
+
+ /* CR2 */
+ ns_vmcb->_cr2 = n2vmcb->_cr2;
+
+ /* Page tables */
+ ns_vmcb->pdpe0 = n2vmcb->pdpe0;
+ ns_vmcb->pdpe1 = n2vmcb->pdpe1;
+ ns_vmcb->pdpe2 = n2vmcb->pdpe2;
+ ns_vmcb->pdpe3 = n2vmcb->pdpe3;
+
+ /* PAT */
+ ns_vmcb->_g_pat = n2vmcb->_g_pat;
+
+ /* Debug Control MSR */
+ ns_vmcb->_debugctlmsr = n2vmcb->_debugctlmsr;
+
+ /* LBR MSRs */
+ ns_vmcb->_lastbranchfromip = n2vmcb->_lastbranchfromip;
+ ns_vmcb->_lastbranchtoip = n2vmcb->_lastbranchtoip;
+ ns_vmcb->_lastintfromip = n2vmcb->_lastintfromip;
+ ns_vmcb->_lastinttoip = n2vmcb->_lastinttoip;
+
+ return 0;
+}
+
+bool_t
+nsvm_vmcb_hap_enabled(struct vcpu *v)
+{
+ return vcpu_nestedsvm(v).ns_hap_enabled;
+}
+
+/* MSR handling */
+int nsvm_rdmsr(struct vcpu *v, unsigned int msr, uint64_t *msr_content)
+{
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+ int ret = 1;
+
+ *msr_content = 0;
+
+ switch (msr) {
+ case MSR_K8_VM_CR:
+ break;
+ case MSR_K8_VM_HSAVE_PA:
+ *msr_content = svm->ns_msr_hsavepa;
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
+
+int nsvm_wrmsr(struct vcpu *v, unsigned int msr, uint64_t msr_content)
+{
+ int ret = 1;
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+
+ switch (msr) {
+ case MSR_K8_VM_CR:
+ /* ignore write. handle all bits as read-only. */
+ break;
+ case MSR_K8_VM_HSAVE_PA:
+ if (!nestedsvm_vmcb_isvalid(v, msr_content)) {
+ gdprintk(XENLOG_ERR,
+ "MSR_K8_VM_HSAVE_PA value invalid 0x%"PRIx64"\n", msr_content);
+ ret = -1; /* inject #GP */
+ break;
+ }
+ svm->ns_msr_hsavepa = msr_content;
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
+
+/* VMEXIT emulation */
+void
+nestedsvm_vmexit_defer(struct vcpu *v,
+ uint64_t exitcode, uint64_t exitinfo1, uint64_t exitinfo2)
+{
+ struct nestedsvm *svm = &vcpu_nestedsvm(v);
+
+ svm->ns_vmexit.exitcode = exitcode;
+ svm->ns_vmexit.exitinfo1 = exitinfo1;
+ svm->ns_vmexit.exitinfo2 = exitinfo2;
+ vcpu_nestedhvm(v).nv_vmexit_pending = 1;
+}
+
+enum nestedhvm_vmexits
+nestedsvm_check_intercepts(struct vcpu *v, struct cpu_user_regs *regs,
+ uint64_t exitcode)
+{
+ bool_t is_intercepted;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+
+ ASSERT(nv->nv_vmexit_pending == 0);
+ is_intercepted = nsvm_vmcb_guest_intercepts_exitcode(v, regs, exitcode);
+
+ switch (exitcode) {
+ case VMEXIT_INVALID:
+ if (is_intercepted)
+ return NESTEDHVM_VMEXIT_INJECT;
+ return NESTEDHVM_VMEXIT_HOST;
+
+ case VMEXIT_INTR:
+ case VMEXIT_NMI:
+ return NESTEDHVM_VMEXIT_HOST;
+ case VMEXIT_EXCEPTION_NM:
+ /* Host must handle lazy fpu context switching first.
+ * Then inject the VMEXIT if L1 guest intercepts this.
+ */
+ return NESTEDHVM_VMEXIT_HOST;
+
+ case VMEXIT_NPF:
+ if (nestedhvm_paging_mode_hap(v)) {
+ if (!is_intercepted)
+ return NESTEDHVM_VMEXIT_FATALERROR;
+ /* host nested paging + guest nested paging */
+ return NESTEDHVM_VMEXIT_HOST;
+ }
+ if (paging_mode_hap(v->domain)) {
+ if (is_intercepted)
+ return NESTEDHVM_VMEXIT_FATALERROR;
+ /* host nested paging + guest shadow paging */
+ return NESTEDHVM_VMEXIT_HOST;
+ }
+ /* host shadow paging + guest shadow paging */
+ /* Can this happen? */
+ BUG();
+ return NESTEDHVM_VMEXIT_FATALERROR;
+ case VMEXIT_EXCEPTION_PF:
+ if (nestedhvm_paging_mode_hap(v)) {
+ /* host nested paging + guest nested paging */
+ if (!is_intercepted)
+ /* l1 guest intercepts #PF unnecessarily */
+ return NESTEDHVM_VMEXIT_HOST;
+ /* l2 guest intercepts #PF unnecessarily */
+ return NESTEDHVM_VMEXIT_INJECT;
+ }
+ if (!paging_mode_hap(v->domain)) {
+ /* host shadow paging + guest shadow paging */
+ return NESTEDHVM_VMEXIT_HOST;
+ }
+ /* host nested paging + guest shadow paging */
+ return NESTEDHVM_VMEXIT_INJECT;
+ case VMEXIT_VMMCALL:
+ /* Always let the guest handle VMMCALL/VMCALL */
+ return NESTEDHVM_VMEXIT_INJECT;
+ default:
+ break;
+ }
+
+ if (is_intercepted)
+ return NESTEDHVM_VMEXIT_INJECT;
+ return NESTEDHVM_VMEXIT_HOST;
+}
+
+enum nestedhvm_vmexits
+nestedsvm_vmexit_n2n1(struct vcpu *v, struct cpu_user_regs *regs)
+{
+ int rc;
+ enum nestedhvm_vmexits ret = NESTEDHVM_VMEXIT_DONE;
+
+ ASSERT(vcpu_nestedhvm(v).nv_vmswitch_in_progress);
+ ASSERT(nestedhvm_vcpu_in_guestmode(v));
+
+ rc = nsvm_vmcb_prepare4vmexit(v);
+ if (rc)
+ ret = NESTEDHVM_VMEXIT_ERROR;
+
+ rc = nhvm_vcpu_hostrestore(v, regs);
+ if (rc)
+ ret = NESTEDHVM_VMEXIT_FATALERROR;
+
+ nestedhvm_vcpu_exit_guestmode(v);
+ return ret;
+}
+
+/* The exitcode is in native SVM/VMX format. The forced exitcode
+ * is in generic format.
+ */
+static enum nestedhvm_vmexits
+nestedsvm_vcpu_vmexit(struct vcpu *v, struct cpu_user_regs *regs,
+ uint64_t exitcode)
+{
+ int rc;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+
+ nv->nv_vmswitch_in_progress = 1;
+
+ ASSERT(nv->nv_vvmcx != NULL);
+
+ /* On special intercepts the host has to handle
+ * the vcpu is still in guest mode here.
+ */
+ if (nestedhvm_vcpu_in_guestmode(v)) {
+ enum nestedhvm_vmexits ret;
+
+ ret = nestedsvm_vmexit_n2n1(v, regs);
+ switch (ret) {
+ case NESTEDHVM_VMEXIT_FATALERROR:
+ gdprintk(XENLOG_ERR, "VMEXIT: fatal error\n");
+ return ret;
+ case NESTEDHVM_VMEXIT_HOST:
+ BUG();
+ return ret;
+ case NESTEDHVM_VMEXIT_ERROR:
+ exitcode = VMEXIT_INVALID;
+ break;
+ default:
+ ASSERT(!nestedhvm_vcpu_in_guestmode(v));
+ break;
+ }
+
+ /* host state has been restored */
+ }
+
+ ASSERT(!nestedhvm_vcpu_in_guestmode(v));
+
+ /* Prepare for running the l1 guest. Make the actual
+ * modifications to the virtual VMCB/VMCS.
+ */
+ rc = nhvm_vcpu_vmexit(v, regs, exitcode);
+
+ nv->nv_vmswitch_in_progress = 0;
+
+ if (rc)
+ return NESTEDHVM_VMEXIT_FATALERROR;
+
+ return NESTEDHVM_VMEXIT_DONE;
+}
+
+/* VCPU switch */
+asmlinkage void nsvm_vcpu_switch(struct cpu_user_regs *regs)
+{
+ struct vcpu *v = current;
+ struct nestedvcpu *nv;
+ struct nestedsvm *svm;
+
+ if (!nestedhvm_enabled(v->domain))
+ return;
+
+ nv = &vcpu_nestedhvm(v);
+ svm = &vcpu_nestedsvm(v);
+ ASSERT(v->arch.hvm_svm.vmcb != NULL);
+ ASSERT(nv->nv_n1vmcx != NULL);
+ ASSERT(nv->nv_n2vmcx != NULL);
+ ASSERT(nv->nv_n1vmcx_pa != VMCX_EADDR);
+ ASSERT(nv->nv_n2vmcx_pa != VMCX_EADDR);
+
+ if (nv->nv_vmexit_pending) {
+ vmexit:
+ nestedsvm_vcpu_vmexit(v, regs, svm->ns_vmexit.exitcode);
+ nv->nv_vmexit_pending = 0;
+ nv->nv_vmentry_pending = 0;
+ return;
+ }
+ if (nv->nv_vmentry_pending) {
+ int ret;
+ ASSERT(!nv->nv_vmexit_pending);
+ ret = nsvm_vcpu_vmrun(v, regs);
+ if (ret < 0)
+ goto vmexit;
+ nv->nv_vmentry_pending = 0;
+ return;
+ }
+}
+
+
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/arch/x86/hvm/svm/svm.c Wed Mar 09 12:36:05 2011 +0100
@@ -49,6 +49,9 @@
#include <asm/hvm/svm/vmcb.h>
#include <asm/hvm/svm/emulate.h>
#include <asm/hvm/svm/intr.h>
+#include <asm/hvm/svm/svmdebug.h>
+#include <asm/hvm/svm/nestedsvm.h>
+#include <asm/hvm/nestedhvm.h>
#include <asm/x86_emulate.h>
#include <public/sched.h>
#include <asm/hvm/vpt.h>
@@ -106,6 +109,44 @@
write_efer(read_efer() & ~EFER_SVME);
}
+unsigned long *
+svm_msrbit(unsigned long *msr_bitmap, uint32_t msr)
+{
+ unsigned long *msr_bit = NULL;
+
+ /*
+ * See AMD64 Programmers Manual, Vol 2, Section 15.10 (MSR-Bitmap Address).
+ */
+ if ( msr <= 0x1fff )
+ msr_bit = msr_bitmap + 0x0000 / BYTES_PER_LONG;
+ else if ( (msr >= 0xc0000000) && (msr <= 0xc0001fff) )
+ msr_bit = msr_bitmap + 0x0800 / BYTES_PER_LONG;
+ else if ( (msr >= 0xc0010000) && (msr <= 0xc0011fff) )
+ msr_bit = msr_bitmap + 0x1000 / BYTES_PER_LONG;
+
+ return msr_bit;
+}
+
+void svm_intercept_msr(struct vcpu *v, uint32_t msr, int enable)
+{
+ unsigned long *msr_bit;
+
+ msr_bit = svm_msrbit(v->arch.hvm_svm.msrpm, msr);
+ BUG_ON(msr_bit == NULL);
+ msr &= 0x1fff;
+
+ if ( enable )
+ {
+ __set_bit(msr * 2, msr_bit);
+ __set_bit(msr * 2 + 1, msr_bit);
+ }
+ else
+ {
+ __clear_bit(msr * 2, msr_bit);
+ __clear_bit(msr * 2 + 1, msr_bit);
+ }
+}
+
static void svm_save_dr(struct vcpu *v)
{
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
@@ -296,7 +337,7 @@
{
svm_load_cpu_state(v, ctxt);
if (svm_vmcb_restore(v, ctxt)) {
- printk("svm_vmcb restore failed!\n");
+ gdprintk(XENLOG_ERR, "svm_vmcb restore failed!\n");
domain_crash(v->domain);
return -EINVAL;
}
@@ -588,7 +629,24 @@
static void svm_set_tsc_offset(struct vcpu *v, u64 offset)
{
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
- vmcb_set_tsc_offset(vmcb, offset);
+ struct vmcb_struct *n1vmcb, *n2vmcb;
+ uint64_t n2_tsc_offset = 0;
+
+ if ( !nestedhvm_enabled(v->domain) ) {
+ vmcb_set_tsc_offset(vmcb, offset);
+ return;
+ }
+
+ n1vmcb = vcpu_nestedhvm(v).nv_n1vmcx;
+ n2vmcb = vcpu_nestedhvm(v).nv_n2vmcx;
+
+ if ( nestedhvm_vcpu_in_guestmode(v) ) {
+ n2_tsc_offset = vmcb_get_tsc_offset(n2vmcb) -
+ vmcb_get_tsc_offset(n1vmcb);
+ vmcb_set_tsc_offset(n1vmcb, offset);
+ }
+
+ vmcb_set_tsc_offset(vmcb, offset + n2_tsc_offset);
}
static void svm_set_rdtsc_exiting(struct vcpu *v, bool_t enable)
@@ -683,9 +741,13 @@
{
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
bool_t debug_state = v->domain->debugger_attached;
- vintr_t intr;
+ bool_t vcpu_guestmode = 0;
- if ( unlikely(v->arch.hvm_vcpu.debug_state_latch != debug_state) )
+ if ( nestedhvm_enabled(v->domain) && nestedhvm_vcpu_in_guestmode(v) )
+ vcpu_guestmode = 1;
+
+ if ( !vcpu_guestmode &&
+ unlikely(v->arch.hvm_vcpu.debug_state_latch != debug_state) )
{
uint32_t intercepts = vmcb_get_exception_intercepts(vmcb);
uint32_t mask = (1U << TRAP_debug) | (1U << TRAP_int3);
@@ -703,13 +765,19 @@
hvm_asid_flush_vcpu(v);
}
- /* Reflect the vlapic's TPR in the hardware vtpr */
- intr = vmcb_get_vintr(vmcb);
- intr.fields.tpr =
- (vlapic_get_reg(vcpu_vlapic(v), APIC_TASKPRI) & 0xFF) >> 4;
- vmcb_set_vintr(vmcb, intr);
+ if ( !vcpu_guestmode )
+ {
+ vintr_t intr;
+
+ /* Reflect the vlapic's TPR in the hardware vtpr */
+ intr = vmcb_get_vintr(vmcb);
+ intr.fields.tpr =
+ (vlapic_get_reg(vcpu_vlapic(v), APIC_TASKPRI) & 0xFF) >> 4;
+ vmcb_set_vintr(vmcb, intr);
+ }
hvm_do_resume(v);
+
reset_stack_and_jump(svm_asm_do_resume);
}
@@ -961,8 +1029,8 @@
struct {
uint64_t gpa;
uint64_t mfn;
- u32 qualification;
- u32 p2mt;
+ uint32_t qualification;
+ uint32_t p2mt;
} _d;
_d.gpa = gpa;
@@ -984,12 +1052,21 @@
static void svm_fpu_dirty_intercept(void)
{
- struct vcpu *curr = current;
- struct vmcb_struct *vmcb = curr->arch.hvm_svm.vmcb;
+ struct vcpu *v = current;
+ struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
- svm_fpu_enter(curr);
+ svm_fpu_enter(v);
- if ( !(curr->arch.hvm_vcpu.guest_cr[0] & X86_CR0_TS) )
+ if ( nestedhvm_enabled(v->domain) && nestedhvm_vcpu_in_guestmode(v) ) {
+ /* Check if guest must make FPU ready for the nested guest */
+ if ( v->arch.hvm_vcpu.guest_cr[0] & X86_CR0_TS )
+ hvm_inject_exception(TRAP_no_device, HVM_DELIVER_NO_ERROR_CODE, 0);
+ else
+ vmcb_set_cr0(vmcb, vmcb_get_cr0(vmcb) & ~X86_CR0_TS);
+ return;
+ }
+
+ if ( !(v->arch.hvm_vcpu.guest_cr[0] & X86_CR0_TS) )
vmcb_set_cr0(vmcb, vmcb_get_cr0(vmcb) & ~X86_CR0_TS);
}
@@ -1003,11 +1080,14 @@
hvm_cpuid(input, eax, ebx, ecx, edx);
- if ( input == 0x80000001 )
- {
+ switch (input) {
+ case 0x80000001:
/* Fix up VLAPIC details. */
if ( vlapic_hw_disabled(vcpu_vlapic(v)) )
__clear_bit(X86_FEATURE_APIC & 31, edx);
+ break;
+ default:
+ break;
}
HVMTRACE_5D (CPUID, input, *eax, *ebx, *ecx, *edx);
@@ -1043,6 +1123,7 @@
static int svm_msr_read_intercept(unsigned int msr, uint64_t *msr_content)
{
+ int ret;
struct vcpu *v = current;
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
@@ -1076,9 +1157,6 @@
*msr_content = 0;
break;
- case MSR_K8_VM_HSAVE_PA:
- goto gpf;
-
case MSR_IA32_DEBUGCTLMSR:
*msr_content = vmcb_get_debugctlmsr(vmcb);
break;
@@ -1111,6 +1189,11 @@
break;
default:
+ ret = nsvm_rdmsr(v, msr, msr_content);
+ if ( ret < 0 )
+ goto gpf;
+ else if ( ret )
+ break;
if ( rdmsr_viridian_regs(msr, msr_content) ||
rdmsr_hypervisor_regs(msr, msr_content) )
@@ -1133,6 +1216,7 @@
static int svm_msr_write_intercept(unsigned int msr, uint64_t msr_content)
{
+ int ret;
struct vcpu *v = current;
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
int sync = 0;
@@ -1153,9 +1237,6 @@
switch ( msr )
{
- case MSR_K8_VM_HSAVE_PA:
- goto gpf;
-
case MSR_IA32_SYSENTER_CS:
vmcb->sysenter_cs = v->arch.hvm_svm.guest_sysenter_cs = msr_content;
break;
@@ -1215,6 +1296,12 @@
break;
default:
+ ret = nsvm_wrmsr(v, msr, msr_content);
+ if ( ret < 0 )
+ goto gpf;
+ else if ( ret )
+ break;
+
if ( wrmsr_viridian_regs(msr, msr_content) )
break;
@@ -1298,6 +1385,96 @@
do_sched_op_compat(SCHEDOP_yield, 0);
}
+static void
+svm_vmexit_do_vmrun(struct cpu_user_regs *regs,
+ struct vcpu *v, uint64_t vmcbaddr)
+{
+ if (!nestedhvm_enabled(v->domain)) {
+ gdprintk(XENLOG_ERR, "VMRUN: nestedhvm disabled, injecting #UD\n");
+ hvm_inject_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE, 0);
+ return;
+ }
+
+ if (!nestedsvm_vmcb_map(v, vmcbaddr)) {
+ gdprintk(XENLOG_ERR, "VMRUN: mapping vmcb failed, injecting #UD\n");
+ hvm_inject_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE, 0);
+ return;
+ }
+
+ vcpu_nestedhvm(v).nv_vmentry_pending = 1;
+ return;
+}
+
+static void
+svm_vmexit_do_vmload(struct vmcb_struct *vmcb,
+ struct cpu_user_regs *regs,
+ struct vcpu *v, uint64_t vmcbaddr)
+{
+ int ret;
+ unsigned int inst_len;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+
+ if ( (inst_len = __get_instruction_length(v, INSTR_VMLOAD)) == 0 )
+ return;
+
+ if (!nestedhvm_enabled(v->domain)) {
+ gdprintk(XENLOG_ERR, "VMLOAD: nestedhvm disabled, injecting #UD\n");
+ ret = TRAP_invalid_op;
+ goto inject;
+ }
+
+ if (!nestedsvm_vmcb_map(v, vmcbaddr)) {
+ gdprintk(XENLOG_ERR, "VMLOAD: mapping vmcb failed, injecting #UD\n");
+ ret = TRAP_invalid_op;
+ goto inject;
+ }
+
+ svm_vmload(nv->nv_vvmcx);
+ /* State in L1 VMCB is stale now */
+ v->arch.hvm_svm.vmcb_in_sync = 0;
+
+ __update_guest_eip(regs, inst_len);
+ return;
+
+ inject:
+ hvm_inject_exception(ret, HVM_DELIVER_NO_ERROR_CODE, 0);
+ return;
+}
+
+static void
+svm_vmexit_do_vmsave(struct vmcb_struct *vmcb,
+ struct cpu_user_regs *regs,
+ struct vcpu *v, uint64_t vmcbaddr)
+{
+ int ret;
+ unsigned int inst_len;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+
+ if ( (inst_len = __get_instruction_length(v, INSTR_VMSAVE)) == 0 )
+ return;
+
+ if (!nestedhvm_enabled(v->domain)) {
+ gdprintk(XENLOG_ERR, "VMSAVE: nestedhvm disabled, injecting #UD\n");
+ ret = TRAP_invalid_op;
+ goto inject;
+ }
+
+ if (!nestedsvm_vmcb_map(v, vmcbaddr)) {
+ gdprintk(XENLOG_ERR, "VMSAVE: mapping vmcb failed, injecting #UD\n");
+ ret = TRAP_invalid_op;
+ goto inject;
+ }
+
+ svm_vmsave(nv->nv_vvmcx);
+
+ __update_guest_eip(regs, inst_len);
+ return;
+
+ inject:
+ hvm_inject_exception(ret, HVM_DELIVER_NO_ERROR_CODE, 0);
+ return;
+}
+
static void svm_vmexit_ud_intercept(struct cpu_user_regs *regs)
{
struct hvm_emulate_ctxt ctxt;
@@ -1428,22 +1605,38 @@
.msr_read_intercept = svm_msr_read_intercept,
.msr_write_intercept = svm_msr_write_intercept,
.invlpg_intercept = svm_invlpg_intercept,
- .set_rdtsc_exiting = svm_set_rdtsc_exiting
+ .set_rdtsc_exiting = svm_set_rdtsc_exiting,
+
+ .nhvm_vcpu_initialise = nsvm_vcpu_initialise,
+ .nhvm_vcpu_destroy = nsvm_vcpu_destroy,
+ .nhvm_vcpu_reset = nsvm_vcpu_reset,
+ .nhvm_vcpu_hostrestore = nsvm_vcpu_hostrestore,
+ .nhvm_vcpu_vmexit = nsvm_vcpu_vmexit_inject,
+ .nhvm_vcpu_vmexit_trap = nsvm_vcpu_vmexit_trap,
+ .nhvm_vcpu_guestcr3 = nsvm_vcpu_guestcr3,
+ .nhvm_vcpu_hostcr3 = nsvm_vcpu_hostcr3,
+ .nhvm_vcpu_asid = nsvm_vcpu_asid,
+ .nhvm_vmcx_guest_intercepts_trap = nsvm_vmcb_guest_intercepts_trap,
+ .nhvm_vmcx_hap_enabled = nsvm_vmcb_hap_enabled,
};
asmlinkage void svm_vmexit_handler(struct cpu_user_regs *regs)
{
- unsigned int exit_reason;
+ uint64_t exit_reason;
struct vcpu *v = current;
struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
eventinj_t eventinj;
int inst_len, rc;
vintr_t intr;
+ bool_t vcpu_guestmode = 0;
if ( paging_mode_hap(v->domain) )
v->arch.hvm_vcpu.guest_cr[3] = v->arch.hvm_vcpu.hw_cr[3] =
vmcb_get_cr3(vmcb);
+ if ( nestedhvm_enabled(v->domain) && nestedhvm_vcpu_in_guestmode(v) )
+ vcpu_guestmode = 1;
+
/*
* Before doing anything else, we need to sync up the VLAPIC's TPR with
* SVM's vTPR. It's OK if the guest doesn't touch CR8 (e.g. 32-bit Windows)
@@ -1451,13 +1644,73 @@
* NB. We need to preserve the low bits of the TPR to make checked builds
* of Windows work, even though they don't actually do anything.
*/
- intr = vmcb_get_vintr(vmcb);
- vlapic_set_reg(vcpu_vlapic(v), APIC_TASKPRI,
+ if ( !vcpu_guestmode ) {
+ intr = vmcb_get_vintr(vmcb);
+ vlapic_set_reg(vcpu_vlapic(v), APIC_TASKPRI,
((intr.fields.tpr & 0x0F) << 4) |
(vlapic_get_reg(vcpu_vlapic(v), APIC_TASKPRI) & 0x0F));
+ }
exit_reason = vmcb->exitcode;
+ if ( vcpu_guestmode ) {
+ enum nestedhvm_vmexits nsret;
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+ struct vmcb_struct *ns_vmcb = nv->nv_vvmcx;
+ uint64_t exitinfo1, exitinfo2;
+
+ /* Write real exitinfo1 back into virtual vmcb.
+ * nestedsvm_check_intercepts() expects to have the correct
+ * exitinfo1 value there.
+ */
+ exitinfo1 = ns_vmcb->exitinfo1;
+ ns_vmcb->exitinfo1 = vmcb->exitinfo1;
+ nsret = nestedsvm_check_intercepts(v, regs, exit_reason);
+ switch (nsret) {
+ case NESTEDHVM_VMEXIT_CONTINUE:
+ BUG();
+ break;
+ case NESTEDHVM_VMEXIT_HOST:
+ break;
+ case NESTEDHVM_VMEXIT_INJECT:
+ /* Switch vcpu from l2 to l1 guest. We must perform
+ * the switch here to have svm_do_resume() working
+ * as intended.
+ */
+ exitinfo1 = vmcb->exitinfo1;
+ exitinfo2 = vmcb->exitinfo2;
+ nv->nv_vmswitch_in_progress = 1;
+ nsret = nestedsvm_vmexit_n2n1(v, regs);
+ nv->nv_vmswitch_in_progress = 0;
+ switch (nsret) {
+ case NESTEDHVM_VMEXIT_DONE:
+ /* defer VMEXIT injection */
+ nestedsvm_vmexit_defer(v, exit_reason, exitinfo1, exitinfo2);
+ goto out;
+ case NESTEDHVM_VMEXIT_FATALERROR:
+ gdprintk(XENLOG_ERR, "unexpected nestedsvm_vmexit() error\n");
+ goto exit_and_crash;
+
+ default:
+ BUG();
+ case NESTEDHVM_VMEXIT_ERROR:
+ break;
+ }
+ case NESTEDHVM_VMEXIT_ERROR:
+ gdprintk(XENLOG_ERR,
+ "nestedsvm_check_intercepts() returned
NESTEDHVM_VMEXIT_ERROR\n");
+ goto out;
+ case NESTEDHVM_VMEXIT_FATALERROR:
+ gdprintk(XENLOG_ERR,
+ "unexpected nestedsvm_check_intercepts() error\n");
+ goto exit_and_crash;
+ default:
+ gdprintk(XENLOG_INFO, "nestedsvm_check_intercepts() returned %i\n",
+ nsret);
+ goto exit_and_crash;
+ }
+ }
+
if ( hvm_long_mode_enabled(v) )
HVMTRACE_ND(VMEXIT64, 1/*cycles*/, 3, exit_reason,
(uint32_t)regs->eip, (uint32_t)((uint64_t)regs->eip >> 32),
@@ -1469,7 +1722,7 @@
if ( unlikely(exit_reason == VMEXIT_INVALID) )
{
- svm_dump_vmcb(__func__, vmcb);
+ svm_vmcb_dump(__func__, vmcb);
goto exit_and_crash;
}
@@ -1630,6 +1883,7 @@
case VMEXIT_VMMCALL:
if ( (inst_len = __get_instruction_length(v, INSTR_VMCALL)) == 0 )
break;
+ BUG_ON(vcpu_guestmode);
HVMTRACE_1D(VMMCALL, regs->eax);
rc = hvm_do_hypercall(regs);
if ( rc != HVM_HCALL_preempted )
@@ -1662,9 +1916,18 @@
case VMEXIT_MONITOR:
case VMEXIT_MWAIT:
+ hvm_inject_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE, 0);
+ break;
+
case VMEXIT_VMRUN:
+ svm_vmexit_do_vmrun(regs, v, regs->eax);
+ break;
case VMEXIT_VMLOAD:
+ svm_vmexit_do_vmload(vmcb, regs, v, regs->eax);
+ break;
case VMEXIT_VMSAVE:
+ svm_vmexit_do_vmsave(vmcb, regs, v, regs->eax);
+ break;
case VMEXIT_STGI:
case VMEXIT_CLGI:
case VMEXIT_SKINIT:
@@ -1708,7 +1971,7 @@
default:
exit_and_crash:
- gdprintk(XENLOG_ERR, "unexpected VMEXIT: exit reason = 0x%x, "
+ gdprintk(XENLOG_ERR, "unexpected VMEXIT: exit reason = 0x%"PRIx64", "
"exitinfo1 = %"PRIx64", exitinfo2 = %"PRIx64"\n",
exit_reason,
(u64)vmcb->exitinfo1, (u64)vmcb->exitinfo2);
@@ -1716,6 +1979,11 @@
break;
}
+ out:
+ if ( vcpu_guestmode )
+ /* Don't clobber TPR of the nested guest. */
+ return;
+
/* The exit may have updated the TPR: reflect this in the hardware vtpr */
intr = vmcb_get_vintr(vmcb);
intr.fields.tpr =
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/svmdebug.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/x86/hvm/svm/svmdebug.c Wed Mar 09 12:36:05 2011 +0100
@@ -0,0 +1,191 @@
+/*
+ * svmdebug.c: debug functions
+ * Copyright (c) 2011, Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm/msr-index.h>
+#include <asm/hvm/svm/svmdebug.h>
+
+static void svm_dump_sel(const char *name, svm_segment_register_t *s)
+{
+ printk("%s: sel=0x%04x, attr=0x%04x, limit=0x%08x, base=0x%016llx\n",
+ name, s->sel, s->attr.bytes, s->limit,
+ (unsigned long long)s->base);
+}
+
+/* This function can directly access fields which are covered by clean bits. */
+void svm_vmcb_dump(const char *from, struct vmcb_struct *vmcb)
+{
+ printk("Dumping guest's current state at %s...\n", from);
+ printk("Size of VMCB = %d, paddr = 0x%016lx, vaddr = %p\n",
+ (int) sizeof(struct vmcb_struct), virt_to_maddr(vmcb), vmcb);
+
+ printk("cr_intercepts = 0x%08x dr_intercepts = 0x%08x "
+ "exception_intercepts = 0x%08x\n",
+ vmcb->_cr_intercepts, vmcb->_dr_intercepts,
+ vmcb->_exception_intercepts);
+ printk("general1_intercepts = 0x%08x general2_intercepts = 0x%08x\n",
+ vmcb->_general1_intercepts, vmcb->_general2_intercepts);
+ printk("iopm_base_pa = 0x%016llx msrpm_base_pa = 0x%016llx tsc_offset = "
+ "0x%016llx\n",
+ (unsigned long long)vmcb->_iopm_base_pa,
+ (unsigned long long)vmcb->_msrpm_base_pa,
+ (unsigned long long)vmcb->_tsc_offset);
+ printk("tlb_control = 0x%08x vintr = 0x%016llx interrupt_shadow = "
+ "0x%016llx\n", vmcb->tlb_control,
+ (unsigned long long)vmcb->_vintr.bytes,
+ (unsigned long long)vmcb->interrupt_shadow);
+ printk("exitcode = 0x%016llx exitintinfo = 0x%016llx\n",
+ (unsigned long long)vmcb->exitcode,
+ (unsigned long long)vmcb->exitintinfo.bytes);
+ printk("exitinfo1 = 0x%016llx exitinfo2 = 0x%016llx \n",
+ (unsigned long long)vmcb->exitinfo1,
+ (unsigned long long)vmcb->exitinfo2);
+ printk("np_enable = 0x%016llx guest_asid = 0x%03x\n",
+ (unsigned long long)vmcb->_np_enable, vmcb->_guest_asid);
+ printk("cpl = %d efer = 0x%016llx star = 0x%016llx lstar = 0x%016llx\n",
+ vmcb->_cpl, (unsigned long long)vmcb->_efer,
+ (unsigned long long)vmcb->star, (unsigned long long)vmcb->lstar);
+ printk("CR0 = 0x%016llx CR2 = 0x%016llx\n",
+ (unsigned long long)vmcb->_cr0, (unsigned long long)vmcb->_cr2);
+ printk("CR3 = 0x%016llx CR4 = 0x%016llx\n",
+ (unsigned long long)vmcb->_cr3, (unsigned long long)vmcb->_cr4);
+ printk("RSP = 0x%016llx RIP = 0x%016llx\n",
+ (unsigned long long)vmcb->rsp, (unsigned long long)vmcb->rip);
+ printk("RAX = 0x%016llx RFLAGS=0x%016llx\n",
+ (unsigned long long)vmcb->rax, (unsigned long long)vmcb->rflags);
+ printk("DR6 = 0x%016llx, DR7 = 0x%016llx\n",
+ (unsigned long long)vmcb->_dr6, (unsigned long long)vmcb->_dr7);
+ printk("CSTAR = 0x%016llx SFMask = 0x%016llx\n",
+ (unsigned long long)vmcb->cstar,
+ (unsigned long long)vmcb->sfmask);
+ printk("KernGSBase = 0x%016llx PAT = 0x%016llx \n",
+ (unsigned long long)vmcb->kerngsbase,
+ (unsigned long long)vmcb->_g_pat);
+ printk("H_CR3 = 0x%016llx CleanBits = 0x%08x\n",
+ (unsigned long long)vmcb->_h_cr3, vmcb->cleanbits.bytes);
+
+ /* print out all the selectors */
+ svm_dump_sel("CS", &vmcb->cs);
+ svm_dump_sel("DS", &vmcb->ds);
+ svm_dump_sel("SS", &vmcb->ss);
+ svm_dump_sel("ES", &vmcb->es);
+ svm_dump_sel("FS", &vmcb->fs);
+ svm_dump_sel("GS", &vmcb->gs);
+ svm_dump_sel("GDTR", &vmcb->gdtr);
+ svm_dump_sel("LDTR", &vmcb->ldtr);
+ svm_dump_sel("IDTR", &vmcb->idtr);
+ svm_dump_sel("TR", &vmcb->tr);
+}
+
+bool_t
+svm_vmcb_isvalid(const char *from, struct vmcb_struct *vmcb,
+ bool_t verbose)
+{
+ bool_t ret = 0; /* ok */
+
+#define PRINTF(...) \
+ if (verbose) { ret = 1; printk("%s: ", from); printk(__VA_ARGS__); \
+ } else return 1;
+
+ if ((vmcb->_efer & EFER_SVME) == 0) {
+ PRINTF("EFER: SVME bit not set (0x%"PRIx64")\n", vmcb->_efer);
+ }
+
+ if ((vmcb->_cr0 & X86_CR0_CD) == 0 && (vmcb->_cr0 & X86_CR0_NW) != 0) {
+ PRINTF("CR0: CD bit is zero and NW bit set (0x%"PRIx64")\n",
+ vmcb->_cr0);
+ }
+
+ if ((vmcb->_cr0 >> 32U) != 0) {
+ PRINTF("CR0: bits [63:32] are not zero (0x%"PRIx64")\n",
+ vmcb->_cr0);
+ }
+
+ if ((vmcb->_cr3 & 0x7) != 0) {
+ PRINTF("CR3: MBZ bits are set (0x%"PRIx64")\n", vmcb->_cr3);
+ }
+ if ((vmcb->_efer & EFER_LMA) && (vmcb->_cr3 & 0xfe) != 0) {
+ PRINTF("CR3: MBZ bits are set (0x%"PRIx64")\n", vmcb->_cr3);
+ }
+
+ if ((vmcb->_cr4 >> 11U) != 0) {
+ PRINTF("CR4: bits [63:11] are not zero (0x%"PRIx64")\n",
+ vmcb->_cr4);
+ }
+
+ if ((vmcb->_dr6 >> 32U) != 0) {
+ PRINTF("DR6: bits [63:32] are not zero (0x%"PRIx64")\n",
+ vmcb->_dr6);
+ }
+
+ if ((vmcb->_dr7 >> 32U) != 0) {
+ PRINTF("DR7: bits [63:32] are not zero (0x%"PRIx64")\n",
+ vmcb->_dr7);
+ }
+
+ if ((vmcb->_efer >> 15U) != 0) {
+ PRINTF("EFER: bits [63:15] are not zero (0x%"PRIx64")\n",
+ vmcb->_efer);
+ }
+
+ if ((vmcb->_efer & EFER_LME) != 0 && ((vmcb->_cr0 & X86_CR0_PG) != 0)) {
+ if ((vmcb->_cr4 & X86_CR4_PAE) == 0) {
+ PRINTF("EFER_LME and CR0.PG are both set and CR4.PAE is zero.\n");
+ }
+ if ((vmcb->_cr0 & X86_CR0_PE) == 0) {
+ PRINTF("EFER_LME and CR0.PG are both set and CR0.PE is zero.\n");
+ }
+ }
+
+ if ((vmcb->_efer & EFER_LME) != 0
+ && (vmcb->_cr0 & X86_CR0_PG) != 0
+ && (vmcb->_cr4 & X86_CR4_PAE) != 0
+ && (vmcb->cs.attr.fields.l != 0)
+ && (vmcb->cs.attr.fields.db != 0))
+ {
+ PRINTF("EFER_LME, CR0.PG, CR4.PAE, CS.L and CS.D are all non-zero.\n");
+ }
+
+ if ((vmcb->_general2_intercepts & GENERAL2_INTERCEPT_VMRUN) == 0) {
+ PRINTF("GENERAL2_INTERCEPT: VMRUN intercept bit is clear
(0x%"PRIx32")\n",
+ vmcb->_general2_intercepts);
+ }
+
+ if (vmcb->eventinj.fields.resvd1 != 0) {
+ PRINTF("eventinj: MBZ bits are set (0x%"PRIx64")\n",
+ vmcb->eventinj.bytes);
+ }
+
+ if (vmcb->_np_enable && vmcb->_h_cr3 == 0) {
+ PRINTF("nested paging enabled but host cr3 is 0\n");
+ }
+
+#undef PRINTF
+ return ret;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/arch/x86/hvm/svm/vmcb.c
--- a/xen/arch/x86/hvm/svm/vmcb.c Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/arch/x86/hvm/svm/vmcb.c Wed Mar 09 12:36:05 2011 +0100
@@ -33,6 +33,7 @@
#include <asm/hvm/svm/svm.h>
#include <asm/hvm/svm/intr.h>
#include <asm/hvm/svm/asid.h>
+#include <asm/hvm/svm/svmdebug.h>
#include <xen/event.h>
#include <xen/kernel.h>
#include <xen/domain_page.h>
@@ -40,9 +41,6 @@
extern int svm_dbg_on;
-#define IOPM_SIZE (12 * 1024)
-#define MSRPM_SIZE (8 * 1024)
-
struct vmcb_struct *alloc_vmcb(void)
{
struct vmcb_struct *vmcb;
@@ -78,37 +76,6 @@
return hsa;
}
-void svm_intercept_msr(struct vcpu *v, uint32_t msr, int enable)
-{
- unsigned long *msr_bitmap = v->arch.hvm_svm.msrpm;
- unsigned long *msr_bit = NULL;
-
- /*
- * See AMD64 Programmers Manual, Vol 2, Section 15.10 (MSR-Bitmap Address).
- */
- if ( msr <= 0x1fff )
- msr_bit = msr_bitmap + 0x0000 / BYTES_PER_LONG;
- else if ( (msr >= 0xc0000000) && (msr <= 0xc0001fff) )
- msr_bit = msr_bitmap + 0x0800 / BYTES_PER_LONG;
- else if ( (msr >= 0xc0010000) && (msr <= 0xc0011fff) )
- msr_bit = msr_bitmap + 0x1000 / BYTES_PER_LONG;
-
- BUG_ON(msr_bit == NULL);
-
- msr &= 0x1fff;
-
- if ( enable )
- {
- __set_bit(msr * 2, msr_bit);
- __set_bit(msr * 2 + 1, msr_bit);
- }
- else
- {
- __clear_bit(msr * 2, msr_bit);
- __clear_bit(msr * 2 + 1, msr_bit);
- }
-}
-
/* This function can directly access fields which are covered by clean bits. */
static int construct_vmcb(struct vcpu *v)
{
@@ -257,7 +224,7 @@
if ( cpu_has_pause_filter )
{
- vmcb->_pause_filter_count = 3000;
+ vmcb->_pause_filter_count = SVM_PAUSEFILTER_INIT;
vmcb->_general1_intercepts |= GENERAL1_INTERCEPT_PAUSE;
}
@@ -268,34 +235,38 @@
int svm_create_vmcb(struct vcpu *v)
{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
struct arch_svm_struct *arch_svm = &v->arch.hvm_svm;
int rc;
- if ( (arch_svm->vmcb == NULL) &&
- (arch_svm->vmcb = alloc_vmcb()) == NULL )
+ if ( (nv->nv_n1vmcx == NULL) &&
+ (nv->nv_n1vmcx = alloc_vmcb()) == NULL )
{
printk("Failed to create a new VMCB\n");
return -ENOMEM;
}
- if ( (rc = construct_vmcb(v)) != 0 )
+ arch_svm->vmcb = nv->nv_n1vmcx;
+ rc = construct_vmcb(v);
+ if ( rc != 0 )
{
- free_vmcb(arch_svm->vmcb);
+ free_vmcb(nv->nv_n1vmcx);
+ nv->nv_n1vmcx = NULL;
arch_svm->vmcb = NULL;
return rc;
}
- arch_svm->vmcb_pa = virt_to_maddr(arch_svm->vmcb);
-
+ arch_svm->vmcb_pa = nv->nv_n1vmcx_pa = virt_to_maddr(arch_svm->vmcb);
return 0;
}
void svm_destroy_vmcb(struct vcpu *v)
{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
struct arch_svm_struct *arch_svm = &v->arch.hvm_svm;
- if ( arch_svm->vmcb != NULL )
- free_vmcb(arch_svm->vmcb);
+ if ( nv->nv_n1vmcx != NULL )
+ free_vmcb(nv->nv_n1vmcx);
if ( arch_svm->msrpm != NULL )
{
@@ -304,81 +275,11 @@
arch_svm->msrpm = NULL;
}
+ nv->nv_n1vmcx = NULL;
+ nv->nv_n1vmcx_pa = VMCX_EADDR;
arch_svm->vmcb = NULL;
}
-static void svm_dump_sel(char *name, svm_segment_register_t *s)
-{
- printk("%s: sel=0x%04x, attr=0x%04x, limit=0x%08x, base=0x%016llx\n",
- name, s->sel, s->attr.bytes, s->limit,
- (unsigned long long)s->base);
-}
-
-/* This function can directly access fields which are covered by clean bits. */
-void svm_dump_vmcb(const char *from, struct vmcb_struct *vmcb)
-{
- printk("Dumping guest's current state at %s...\n", from);
- printk("Size of VMCB = %d, paddr = 0x%016lx, vaddr = %p\n",
- (int) sizeof(struct vmcb_struct), virt_to_maddr(vmcb), vmcb);
-
- printk("cr_intercepts = 0x%08x dr_intercepts = 0x%08x "
- "exception_intercepts = 0x%08x\n",
- vmcb->_cr_intercepts, vmcb->_dr_intercepts,
- vmcb->_exception_intercepts);
- printk("general1_intercepts = 0x%08x general2_intercepts = 0x%08x\n",
- vmcb->_general1_intercepts, vmcb->_general2_intercepts);
- printk("iopm_base_pa = 0x%016llx msrpm_base_pa = 0x%016llx tsc_offset = "
- "0x%016llx\n",
- (unsigned long long)vmcb->_iopm_base_pa,
- (unsigned long long)vmcb->_msrpm_base_pa,
- (unsigned long long)vmcb->_tsc_offset);
- printk("tlb_control = 0x%08x vintr = 0x%016llx interrupt_shadow = "
- "0x%016llx\n", vmcb->tlb_control,
- (unsigned long long)vmcb->_vintr.bytes,
- (unsigned long long)vmcb->interrupt_shadow);
- printk("exitcode = 0x%016llx exitintinfo = 0x%016llx\n",
- (unsigned long long)vmcb->exitcode,
- (unsigned long long)vmcb->exitintinfo.bytes);
- printk("exitinfo1 = 0x%016llx exitinfo2 = 0x%016llx \n",
- (unsigned long long)vmcb->exitinfo1,
- (unsigned long long)vmcb->exitinfo2);
- printk("np_enable = 0x%016llx guest_asid = 0x%03x\n",
- (unsigned long long)vmcb->_np_enable, vmcb->_guest_asid);
- printk("cpl = %d efer = 0x%016llx star = 0x%016llx lstar = 0x%016llx\n",
- vmcb->_cpl, (unsigned long long)vmcb->_efer,
- (unsigned long long)vmcb->star, (unsigned long long)vmcb->lstar);
- printk("CR0 = 0x%016llx CR2 = 0x%016llx\n",
- (unsigned long long)vmcb->_cr0, (unsigned long long)vmcb->_cr2);
- printk("CR3 = 0x%016llx CR4 = 0x%016llx\n",
- (unsigned long long)vmcb->_cr3, (unsigned long long)vmcb->_cr4);
- printk("RSP = 0x%016llx RIP = 0x%016llx\n",
- (unsigned long long)vmcb->rsp, (unsigned long long)vmcb->rip);
- printk("RAX = 0x%016llx RFLAGS=0x%016llx\n",
- (unsigned long long)vmcb->rax, (unsigned long long)vmcb->rflags);
- printk("DR6 = 0x%016llx, DR7 = 0x%016llx\n",
- (unsigned long long)vmcb->_dr6, (unsigned long long)vmcb->_dr7);
- printk("CSTAR = 0x%016llx SFMask = 0x%016llx\n",
- (unsigned long long)vmcb->cstar,
- (unsigned long long)vmcb->sfmask);
- printk("KernGSBase = 0x%016llx PAT = 0x%016llx \n",
- (unsigned long long)vmcb->kerngsbase,
- (unsigned long long)vmcb->_g_pat);
- printk("H_CR3 = 0x%016llx CleanBits = 0x%08x\n",
- (unsigned long long)vmcb->_h_cr3, vmcb->cleanbits.bytes);
-
- /* print out all the selectors */
- svm_dump_sel("CS", &vmcb->cs);
- svm_dump_sel("DS", &vmcb->ds);
- svm_dump_sel("SS", &vmcb->ss);
- svm_dump_sel("ES", &vmcb->es);
- svm_dump_sel("FS", &vmcb->fs);
- svm_dump_sel("GS", &vmcb->gs);
- svm_dump_sel("GDTR", &vmcb->gdtr);
- svm_dump_sel("LDTR", &vmcb->ldtr);
- svm_dump_sel("IDTR", &vmcb->idtr);
- svm_dump_sel("TR", &vmcb->tr);
-}
-
static void vmcb_dump(unsigned char ch)
{
struct domain *d;
@@ -396,7 +297,7 @@
for_each_vcpu ( d, v )
{
printk("\tVCPU %d\n", v->vcpu_id);
- svm_dump_vmcb("key_handler", v->arch.hvm_svm.vmcb);
+ svm_vmcb_dump("key_handler", v->arch.hvm_svm.vmcb);
}
}
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/include/asm-x86/hvm/svm/emulate.h
--- a/xen/include/asm-x86/hvm/svm/emulate.h Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/include/asm-x86/hvm/svm/emulate.h Wed Mar 09 12:36:05 2011 +0100
@@ -33,6 +33,11 @@
INSTR_RDTSC,
INSTR_PAUSE,
INSTR_XSETBV,
+ INSTR_VMRUN,
+ INSTR_VMLOAD,
+ INSTR_VMSAVE,
+ INSTR_STGI,
+ INSTR_CLGI,
INSTR_MAX_COUNT /* Must be last - Number of instructions supported */
};
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/include/asm-x86/hvm/svm/nestedsvm.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/asm-x86/hvm/svm/nestedsvm.h Wed Mar 09 12:36:05 2011 +0100
@@ -0,0 +1,129 @@
+/*
+ * nestedsvm.h: Nested Virtualization
+ * Copyright (c) 2011, Advanced Micro Devices, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+#ifndef __ASM_X86_HVM_SVM_NESTEDSVM_H__
+#define __ASM_X86_HVM_SVM_NESTEDSVM_H__
+
+#include <asm/config.h>
+#include <asm/hvm/hvm.h>
+#include <asm/hvm/svm/vmcb.h>
+
+struct nestedsvm {
+ uint64_t ns_msr_hsavepa; /* MSR HSAVE_PA value */
+
+ /* l1 guest physical address of virtual vmcb used by prior VMRUN.
+ * Needed for VMCB Cleanbit emulation.
+ */
+ uint64_t ns_ovvmcb_pa;
+
+ /* Cached real intercepts of the l2 guest */
+ uint32_t ns_cr_intercepts;
+ uint32_t ns_dr_intercepts;
+ uint32_t ns_exception_intercepts;
+ uint32_t ns_general1_intercepts;
+ uint32_t ns_general2_intercepts;
+
+ /* Cached real lbr of the l2 guest */
+ lbrctrl_t ns_lbr_control;
+
+ /* Cached real MSR permission bitmaps of the l2 guest */
+ unsigned long *ns_cached_msrpm;
+ /* Merged MSR permission bitmap */
+ unsigned long *ns_merged_msrpm;
+
+ /* guest physical address of virtual io permission map */
+ paddr_t ns_iomap_pa, ns_oiomap_pa;
+ /* Shadow io permission map */
+ unsigned long *ns_iomap;
+
+ /* Cache guest cr3/host cr3 the guest sets up for the l2 guest.
+ * Used by Shadow-on-Shadow and Nested-on-Nested.
+ * ns_vmcb_guestcr3: in l2 guest physical address space and points to
+ * the l2 guest page table
+ * ns_vmcb_hostcr3: in l1 guest physical address space and points to
+ * the l1 guest nested page table
+ */
+ uint64_t ns_vmcb_guestcr3, ns_vmcb_hostcr3;
+ uint32_t ns_guest_asid;
+
+ bool_t ns_hap_enabled;
+
+ /* Only meaningful when vmexit_pending flag is set */
+ struct {
+ uint64_t exitcode; /* native exitcode to inject into l1 guest */
+ uint64_t exitinfo1; /* additional information to the exitcode */
+ uint64_t exitinfo2; /* additional information to the exitcode */
+ } ns_vmexit;
+ union {
+ uint32_t bytes;
+ struct {
+ uint32_t rflagsif: 1;
+ uint32_t vintrmask: 1;
+ uint32_t reserved: 30;
+ } fields;
+ } ns_hostflags;
+};
+
+#define vcpu_nestedsvm(v) (vcpu_nestedhvm(v).u.nsvm)
+
+/* True when l1 guest enabled SVM in EFER */
+#define hvm_svm_enabled(v) \
+ (!!((v)->arch.hvm_vcpu.guest_efer & EFER_SVME))
+
+int nestedsvm_vmcb_map(struct vcpu *v, uint64_t vmcbaddr);
+void nestedsvm_vmexit_defer(struct vcpu *v,
+ uint64_t exitcode, uint64_t exitinfo1, uint64_t exitinfo2);
+enum nestedhvm_vmexits
+nestedsvm_vmexit_n2n1(struct vcpu *v, struct cpu_user_regs *regs);
+enum nestedhvm_vmexits
+nestedsvm_check_intercepts(struct vcpu *v, struct cpu_user_regs *regs,
+ uint64_t exitcode);
+
+/* Interface methods */
+int nsvm_vcpu_destroy(struct vcpu *v);
+int nsvm_vcpu_initialise(struct vcpu *v);
+int nsvm_vcpu_reset(struct vcpu *v);
+int nsvm_vcpu_hostrestore(struct vcpu *v, struct cpu_user_regs *regs);
+int nsvm_vcpu_vmrun(struct vcpu *v, struct cpu_user_regs *regs);
+int nsvm_vcpu_vmexit_inject(struct vcpu *v, struct cpu_user_regs *regs,
+ uint64_t exitcode);
+int nsvm_vcpu_vmexit_trap(struct vcpu *v, unsigned int trapnr,
+ int errcode, unsigned long cr2);
+uint64_t nsvm_vcpu_guestcr3(struct vcpu *v);
+uint64_t nsvm_vcpu_hostcr3(struct vcpu *v);
+uint32_t nsvm_vcpu_asid(struct vcpu *v);
+int nsvm_vmcb_guest_intercepts_exitcode(struct vcpu *v,
+ struct cpu_user_regs *regs, uint64_t exitcode);
+int nsvm_vmcb_guest_intercepts_trap(struct vcpu *v, unsigned int trapnr);
+bool_t nsvm_vmcb_hap_enabled(struct vcpu *v);
+
+/* MSRs */
+int nsvm_rdmsr(struct vcpu *v, unsigned int msr, uint64_t *msr_content);
+int nsvm_wrmsr(struct vcpu *v, unsigned int msr, uint64_t msr_content);
+
+#endif /* ASM_X86_HVM_SVM_NESTEDSVM_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/include/asm-x86/hvm/svm/svm.h
--- a/xen/include/asm-x86/hvm/svm/svm.h Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/include/asm-x86/hvm/svm/svm.h Wed Mar 09 12:36:05 2011 +0100
@@ -29,8 +29,6 @@
#include <asm/i387.h>
#include <asm/hvm/vpmu.h>
-void svm_dump_vmcb(const char *from, struct vmcb_struct *vmcb);
-
#define SVM_REG_EAX (0)
#define SVM_REG_ECX (1)
#define SVM_REG_EDX (2)
@@ -62,6 +60,8 @@
: : "a" (__pa(vmcb)) : "memory" );
}
+unsigned long *svm_msrbit(unsigned long *msr_bitmap, uint32_t msr);
+
extern u32 svm_feature_flags;
#define SVM_FEATURE_NPT 0 /* Nested page table support */
@@ -82,4 +82,6 @@
#define cpu_has_svm_cleanbits cpu_has_svm_feature(SVM_FEATURE_VMCBCLEAN)
#define cpu_has_pause_filter cpu_has_svm_feature(SVM_FEATURE_PAUSEFILTER)
+#define SVM_PAUSEFILTER_INIT 3000
+
#endif /* __ASM_X86_HVM_SVM_H__ */
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/include/asm-x86/hvm/svm/svmdebug.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/asm-x86/hvm/svm/svmdebug.h Wed Mar 09 12:36:05 2011 +0100
@@ -0,0 +1,30 @@
+/*
+ * svmdebug.h: SVM related debug defintions
+ * Copyright (c) 2011, AMD Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+
+#ifndef __ASM_X86_HVM_SVM_SVMDEBUG_H__
+#define __ASM_X86_HVM_SVM_SVMDEBUG_H__
+
+#include <asm/types.h>
+#include <asm/hvm/svm/vmcb.h>
+
+void svm_vmcb_dump(const char *from, struct vmcb_struct *vmcb);
+bool_t svm_vmcb_isvalid(const char *from, struct vmcb_struct *vmcb,
+ bool_t verbose);
+
+#endif /* __ASM_X86_HVM_SVM_SVMDEBUG_H__ */
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/include/asm-x86/hvm/svm/vmcb.h
--- a/xen/include/asm-x86/hvm/svm/vmcb.h Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/include/asm-x86/hvm/svm/vmcb.h Wed Mar 09 12:36:05 2011 +0100
@@ -398,6 +398,9 @@
} fields;
} __attribute__ ((packed)) vmcbcleanbits_t;
+#define IOPM_SIZE (12 * 1024)
+#define MSRPM_SIZE (8 * 1024)
+
struct vmcb_struct {
u32 _cr_intercepts; /* offset 0x00 - cleanbit 0 */
u32 _dr_intercepts; /* offset 0x04 - cleanbit 0 */
diff -r a21d019bb8fe -r a5e69b6fdd16 xen/include/asm-x86/hvm/vcpu.h
--- a/xen/include/asm-x86/hvm/vcpu.h Mon Feb 28 12:21:57 2011 +0100
+++ b/xen/include/asm-x86/hvm/vcpu.h Wed Mar 09 12:36:05 2011 +0100
@@ -25,6 +25,7 @@
#include <asm/hvm/vlapic.h>
#include <asm/hvm/vmx/vmcs.h>
#include <asm/hvm/svm/vmcb.h>
+#include <asm/hvm/svm/nestedsvm.h>
#include <asm/mtrr.h>
enum hvm_io_state {
@@ -50,6 +51,7 @@
/* SVM/VMX arch specific */
union {
+ struct nestedsvm nsvm;
} u;
bool_t nv_flushp2m; /* True, when p2m table must be flushed */
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