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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Nested Virtualization core implementation
# HG changeset patch
# User cegger
# Date 1298892106 -3600
# Node ID 981397a3a586e66c957d82b553d8e5df47ed8dbf
# Parent 5a137177a6dfc8107481aed16e0876f86b4771ac
Nested Virtualization core implementation
Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
Acked-by: Eddie Dong <eddie.dong@xxxxxxxxx>
Acked-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Committed-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
---
diff -r 5a137177a6df -r 981397a3a586 xen/arch/x86/hvm/Makefile
--- a/xen/arch/x86/hvm/Makefile Mon Feb 28 12:21:44 2011 +0100
+++ b/xen/arch/x86/hvm/Makefile Mon Feb 28 12:21:46 2011 +0100
@@ -10,6 +10,7 @@
obj-y += io.o
obj-y += irq.o
obj-y += mtrr.o
+obj-y += nestedhvm.o
obj-y += pmtimer.o
obj-y += quirks.o
obj-y += rtc.o
diff -r 5a137177a6df -r 981397a3a586 xen/arch/x86/hvm/nestedhvm.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/x86/hvm/nestedhvm.c Mon Feb 28 12:21:46 2011 +0100
@@ -0,0 +1,177 @@
+/*
+ * Nested HVM
+ * Copyright (c) 2011, Advanced Micro Devices, Inc.
+ * Author: Christoph Egger <Christoph.Egger@xxxxxxx>
+ *
+ * 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/msr.h>
+#include <asm/hvm/support.h> /* for HVM_DELIVER_NO_ERROR_CODE */
+#include <asm/hvm/hvm.h>
+#include <asm/hvm/nestedhvm.h>
+#include <asm/event.h> /* for local_event_delivery_(en|dis)able */
+#include <asm/paging.h> /* for paging_mode_hap() */
+
+
+/* Nested HVM on/off per domain */
+bool_t
+nestedhvm_enabled(struct domain *d)
+{
+ bool_t enabled;
+
+ enabled = !!(d->arch.hvm_domain.params[HVM_PARAM_NESTEDHVM]);
+ /* sanity check */
+ BUG_ON(enabled && !is_hvm_domain(d));
+
+ if (!is_hvm_domain(d))
+ return 0;
+
+ return enabled;
+}
+
+/* Nested VCPU */
+bool_t
+nestedhvm_vcpu_in_guestmode(struct vcpu *v)
+{
+ return vcpu_nestedhvm(v).nv_guestmode;
+}
+
+void
+nestedhvm_vcpu_reset(struct vcpu *v)
+{
+ struct nestedvcpu *nv = &vcpu_nestedhvm(v);
+
+ nv->nv_vmentry_pending = 0;
+ nv->nv_vmexit_pending = 0;
+ nv->nv_vmswitch_in_progress = 0;
+ nv->nv_ioport80 = 0;
+ nv->nv_ioportED = 0;
+
+ if (nv->nv_vvmcx)
+ hvm_unmap_guest_frame(nv->nv_vvmcx);
+ nv->nv_vvmcx = NULL;
+ nv->nv_vvmcxaddr = VMCX_EADDR;
+ nv->nv_flushp2m = 0;
+ nv->nv_p2m = NULL;
+
+ nhvm_vcpu_reset(v);
+
+ /* vcpu is in host mode */
+ nestedhvm_vcpu_exit_guestmode(v);
+}
+
+int
+nestedhvm_vcpu_initialise(struct vcpu *v)
+{
+ int rc;
+
+ rc = nhvm_vcpu_initialise(v);
+ if (rc) {
+ nhvm_vcpu_destroy(v);
+ return rc;
+ }
+
+ nestedhvm_vcpu_reset(v);
+ return 0;
+}
+
+int
+nestedhvm_vcpu_destroy(struct vcpu *v)
+{
+ if (!nestedhvm_enabled(v->domain))
+ return 0;
+
+ return nhvm_vcpu_destroy(v);
+}
+
+/* Common shadow IO Permission bitmap */
+
+/* There four global patterns of io bitmap each guest can
+ * choose depending on interception of io port 0x80 and/or
+ * 0xED (shown in table below).
+ * The users of the bitmap patterns are in SVM/VMX specific code.
+ *
+ * bitmap port 0x80 port 0xed
+ * hvm_io_bitmap cleared cleared
+ * iomap[0] cleared set
+ * iomap[1] set cleared
+ * iomap[2] set set
+ */
+
+/* same format and size as hvm_io_bitmap */
+#define IOBITMAP_SIZE 3*PAGE_SIZE/BYTES_PER_LONG
+/* same format as hvm_io_bitmap */
+#define IOBITMAP_VMX_SIZE 2*PAGE_SIZE/BYTES_PER_LONG
+
+static unsigned long *shadow_io_bitmap[3];
+
+void
+nestedhvm_setup(void)
+{
+ /* shadow_io_bitmaps can't be declared static because
+ * they must fulfill hw requirements (page aligned section)
+ * and doing so triggers the ASSERT(va >= XEN_VIRT_START)
+ * in __virt_to_maddr()
+ *
+ * So as a compromise pre-allocate them when xen boots.
+ * This function must be called from within start_xen() when
+ * it is valid to use _xmalloc()
+ */
+
+ /* shadow I/O permission bitmaps */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) {
+ /* Same format as hvm_io_bitmap */
+ shadow_io_bitmap[0] = _xmalloc(IOBITMAP_VMX_SIZE, PAGE_SIZE);
+ shadow_io_bitmap[1] = _xmalloc(IOBITMAP_VMX_SIZE, PAGE_SIZE);
+ shadow_io_bitmap[2] = _xmalloc(IOBITMAP_VMX_SIZE, PAGE_SIZE);
+ memset(shadow_io_bitmap[0], ~0U, IOBITMAP_VMX_SIZE);
+ memset(shadow_io_bitmap[1], ~0U, IOBITMAP_VMX_SIZE);
+ memset(shadow_io_bitmap[2], ~0U, IOBITMAP_VMX_SIZE);
+ } else {
+ /* Same size and format as hvm_io_bitmap */
+ shadow_io_bitmap[0] = _xmalloc(IOBITMAP_SIZE, PAGE_SIZE);
+ shadow_io_bitmap[1] = _xmalloc(IOBITMAP_SIZE, PAGE_SIZE);
+ shadow_io_bitmap[2] = _xmalloc(IOBITMAP_SIZE, PAGE_SIZE);
+ memset(shadow_io_bitmap[0], ~0U, IOBITMAP_SIZE);
+ memset(shadow_io_bitmap[1], ~0U, IOBITMAP_SIZE);
+ memset(shadow_io_bitmap[2], ~0U, IOBITMAP_SIZE);
+ }
+
+ __clear_bit(0x80, shadow_io_bitmap[0]);
+ __clear_bit(0xed, shadow_io_bitmap[1]);
+}
+
+unsigned long *
+nestedhvm_vcpu_iomap_get(bool_t port_80, bool_t port_ed)
+{
+ int i;
+ extern int hvm_port80_allowed;
+
+ if (!hvm_port80_allowed)
+ port_80 = 1;
+
+ if (port_80 == 0) {
+ if (port_ed == 0)
+ return hvm_io_bitmap;
+ i = 0;
+ } else {
+ if (port_ed == 0)
+ i = 1;
+ else
+ i = 2;
+ }
+
+ return shadow_io_bitmap[i];
+}
diff -r 5a137177a6df -r 981397a3a586 xen/arch/x86/setup.c
--- a/xen/arch/x86/setup.c Mon Feb 28 12:21:44 2011 +0100
+++ b/xen/arch/x86/setup.c Mon Feb 28 12:21:46 2011 +0100
@@ -1260,6 +1260,8 @@
if ( opt_watchdog )
watchdog_setup();
+
+ nestedhvm_setup();
if ( !tboot_protect_mem_regions() )
panic("Could not protect TXT memory regions\n");
diff -r 5a137177a6df -r 981397a3a586 xen/include/asm-x86/hvm/nestedhvm.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/asm-x86/hvm/nestedhvm.h Mon Feb 28 12:21:46 2011 +0100
@@ -0,0 +1,63 @@
+/*
+ * Nested HVM
+ * Copyright (c) 2011, Advanced Micro Devices, Inc.
+ * Author: Christoph Egger <Christoph.Egger@xxxxxxx>
+ *
+ * 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 _HVM_NESTEDHVM_H
+#define _HVM_NESTEDHVM_H
+
+#include <xen/types.h> /* for uintNN_t */
+#include <xen/sched.h> /* for struct vcpu, struct domain */
+#include <asm/hvm/vcpu.h> /* for vcpu_nestedhvm */
+
+enum nestedhvm_vmexits {
+ NESTEDHVM_VMEXIT_ERROR = 0, /* inject VMEXIT w/ invalid VMCB */
+ NESTEDHVM_VMEXIT_FATALERROR = 1, /* crash first level guest */
+ NESTEDHVM_VMEXIT_HOST = 2, /* exit handled on host level */
+ NESTEDHVM_VMEXIT_CONTINUE = 3, /* further handling */
+ NESTEDHVM_VMEXIT_INJECT = 4, /* inject VMEXIT */
+ NESTEDHVM_VMEXIT_DONE = 5, /* VMEXIT handled */
+};
+
+/* Nested HVM on/off per domain */
+bool_t nestedhvm_enabled(struct domain *d);
+
+/* Nested VCPU */
+int nestedhvm_vcpu_initialise(struct vcpu *v);
+int nestedhvm_vcpu_destroy(struct vcpu *v);
+void nestedhvm_vcpu_reset(struct vcpu *v);
+bool_t nestedhvm_vcpu_in_guestmode(struct vcpu *v);
+#define nestedhvm_vcpu_enter_guestmode(v) \
+ vcpu_nestedhvm(v).nv_guestmode = 1
+#define nestedhvm_vcpu_exit_guestmode(v) \
+ vcpu_nestedhvm(v).nv_guestmode = 0
+
+/* Nested paging */
+#define NESTEDHVM_PAGEFAULT_DONE 0
+#define NESTEDHVM_PAGEFAULT_INJECT 1
+#define NESTEDHVM_PAGEFAULT_ERROR 2
+int nestedhvm_hap_nested_page_fault(struct vcpu *v, paddr_t L2_gpa);
+
+/* IO permission map */
+unsigned long *nestedhvm_vcpu_iomap_get(bool_t ioport_80, bool_t ioport_ed);
+
+/* Misc */
+#define nestedhvm_paging_mode_hap(v) (!!nhvm_vmcx_hap_enabled(v))
+#define nestedhvm_vmswitch_in_progress(v) \
+ (!!vcpu_nestedhvm((v)).nv_vmswitch_in_progress)
+
+#endif /* _HVM_NESTEDHVM_H */
diff -r 5a137177a6df -r 981397a3a586 xen/include/asm-x86/setup.h
--- a/xen/include/asm-x86/setup.h Mon Feb 28 12:21:44 2011 +0100
+++ b/xen/include/asm-x86/setup.h Mon Feb 28 12:21:46 2011 +0100
@@ -23,6 +23,7 @@
void numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn);
void arch_init_memory(void);
void subarch_init_memory(void);
+void nestedhvm_setup(void);
void init_IRQ(void);
void vesa_init(void);
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