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Provide basic descriptions for VMX exit reason (from "Intel 64 and IA-32

Browse source 
Architectures Software Developer’s Manual Volume 3").  Add the document
to SEE ALSO in bhyve.8 (and pet manlint here a bit).

Reviewed by:	jhb, rgrimes, 0mp
Approved by:	kib (mentor)
Differential Revision:	https://reviews.freebsd.org/D17531
This commit is contained in:
Yuri Pankov 2018-10-27 21:24:28 +00:00
parent 5ef2488947
commit 8d56c80545
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=339826
3 changed files with 107 additions and 10 deletions
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8
sys/amd64/vmm/intel/vmcs.h
View file

@ -338,6 +338,14 @@ vmcs_write(uint32_t encoding, uint64_t val)
#define EXIT_REASON_WBINVD 54
#define EXIT_REASON_XSETBV 55
#define EXIT_REASON_APIC_WRITE 56
#define EXIT_REASON_RDRAND 57
#define EXIT_REASON_INVPCID 58
#define EXIT_REASON_VMFUNC 59
#define EXIT_REASON_ENCLS 60
#define EXIT_REASON_RDSEED 61
#define EXIT_REASON_PM_LOG_FULL 62
#define EXIT_REASON_XSAVES 63
#define EXIT_REASON_XRSTORS 64
/*
* NMI unblocking due to IRET.

25
usr.sbin/bhyve/bhyve.8
View file

@ -367,7 +367,11 @@ Emergency write is advertised, but no-op at present.
.Pp
Framebuffer devices:
.Bl -tag -width 10n
.It Oo rfb= Ns Oo Ar IP: Oc Ns Ar port Oc Ns Oo ,w= Ns Ar width Oc Ns Oo ,h= Ns Ar height Oc Ns Oo ,vga= Ns Ar vgaconf Oc Ns Oo Ns ,wait Oc Ns Oo ,password= Ns Ar password Oc
.It Xo
.Oo rfb= Ns Oo Ar IP\&: Oc Ns Ar port Oc Ns Oo ,w= Ns Ar width Oc Ns Oo ,h= Ns
.Ar height Oc Ns Oo ,vga= Ns Ar vgaconf Oc Ns Oo Ns ,wait Oc Ns Oo ,password= Ns
.Ar password Oc
.Xc
.Bl -tag -width 8n
.It Ar IPv4:port No or Ar [IPv6%zone]:port
An
@ -398,8 +402,8 @@ and memory space
.Pq 64KB at Ad 0xA0000 .
The default
.Dq io
option should be used for guests that attempt to issue BIOS
calls which result in I/O port queries, and fail to boot if I/O decode is disabled.
option should be used for guests that attempt to issue BIOS calls which result
in I/O port queries, and fail to boot if I/O decode is disabled.
.Pp
The
.Dq on
@ -424,8 +428,8 @@ for configuration notes of particular guests.
.It wait
Instruct
.Nm
to only boot upon the initiation of a VNC connection, simplifying the installation
of operating systems that require immediate keyboard input.
to only boot upon the initiation of a VNC connection, simplifying the
installation of operating systems that require immediate keyboard input.
This can be removed for post-installation use.
.It password
This type of authentication is known to be cryptographically weak and is not
@ -497,8 +501,9 @@ General purpose registers can be queried for each virtual CPU, but other
registers such as floating-point and system registers cannot be queried.
.Ss Memory
Memory (including memory mapped I/O regions) can be read by the debugger,
but not written. Memory operations use virtual addresses that are resolved
to physical addresses via the current virtual CPU's active address translation.
but not written.
Memory operations use virtual addresses that are resolved to physical addresses
via the current virtual CPU's active address translation.
.Ss Control
The running guest can be interrupted by the debugger at any time
.Pq for example, by pressing Ctrl-C in the debugger .
@ -609,6 +614,12 @@ bhyve -c 2 -m 4G -w -H \\
.Xr ethers 5 ,
.Xr bhyvectl 8 ,
.Xr bhyveload 8
.Pp
.Rs
.%A Intel
.%B 64 and IA-32 Architectures Software Developer’s Manual
.%V Volume 3
.Re
.Sh HISTORY
.Nm
first appeared in

84
usr.sbin/bhyve/bhyverun.c
View file

@ -38,6 +38,8 @@ __FBSDID("$FreeBSD$");
#include <sys/mman.h>
#include <sys/time.h>
#include <amd64/vmm/intel/vmcs.h>
#include <machine/atomic.h>
#include <machine/segments.h>
@ -89,6 +91,73 @@ __FBSDID("$FreeBSD$");
#define MB (1024UL * 1024)
#define GB (1024UL * MB)
static const char * const vmx_exit_reason_desc[] = {
[EXIT_REASON_EXCEPTION] = "Exception or non-maskable interrupt (NMI)",
[EXIT_REASON_EXT_INTR] = "External interrupt",
[EXIT_REASON_TRIPLE_FAULT] = "Triple fault",
[EXIT_REASON_INIT] = "INIT signal",
[EXIT_REASON_SIPI] = "Start-up IPI (SIPI)",
[EXIT_REASON_IO_SMI] = "I/O system-management interrupt (SMI)",
[EXIT_REASON_SMI] = "Other SMI",
[EXIT_REASON_INTR_WINDOW] = "Interrupt window",
[EXIT_REASON_NMI_WINDOW] = "NMI window",
[EXIT_REASON_TASK_SWITCH] = "Task switch",
[EXIT_REASON_CPUID] = "CPUID",
[EXIT_REASON_GETSEC] = "GETSEC",
[EXIT_REASON_HLT] = "HLT",
[EXIT_REASON_INVD] = "INVD",
[EXIT_REASON_INVLPG] = "INVLPG",
[EXIT_REASON_RDPMC] = "RDPMC",
[EXIT_REASON_RDTSC] = "RDTSC",
[EXIT_REASON_RSM] = "RSM",
[EXIT_REASON_VMCALL] = "VMCALL",
[EXIT_REASON_VMCLEAR] = "VMCLEAR",
[EXIT_REASON_VMLAUNCH] = "VMLAUNCH",
[EXIT_REASON_VMPTRLD] = "VMPTRLD",
[EXIT_REASON_VMPTRST] = "VMPTRST",
[EXIT_REASON_VMREAD] = "VMREAD",
[EXIT_REASON_VMRESUME] = "VMRESUME",
[EXIT_REASON_VMWRITE] = "VMWRITE",
[EXIT_REASON_VMXOFF] = "VMXOFF",
[EXIT_REASON_VMXON] = "VMXON",
[EXIT_REASON_CR_ACCESS] = "Control-register accesses",
[EXIT_REASON_DR_ACCESS] = "MOV DR",
[EXIT_REASON_INOUT] = "I/O instruction",
[EXIT_REASON_RDMSR] = "RDMSR",
[EXIT_REASON_WRMSR] = "WRMSR",
[EXIT_REASON_INVAL_VMCS] =
"VM-entry failure due to invalid guest state",
[EXIT_REASON_INVAL_MSR] = "VM-entry failure due to MSR loading",
[EXIT_REASON_MWAIT] = "MWAIT",
[EXIT_REASON_MTF] = "Monitor trap flag",
[EXIT_REASON_MONITOR] = "MONITOR",
[EXIT_REASON_PAUSE] = "PAUSE",
[EXIT_REASON_MCE_DURING_ENTRY] =
"VM-entry failure due to machine-check event",
[EXIT_REASON_TPR] = "TPR below threshold",
[EXIT_REASON_APIC_ACCESS] = "APIC access",
[EXIT_REASON_VIRTUALIZED_EOI] = "Virtualized EOI",
[EXIT_REASON_GDTR_IDTR] = "Access to GDTR or IDTR",
[EXIT_REASON_LDTR_TR] = "Access to LDTR or TR",
[EXIT_REASON_EPT_FAULT] = "EPT violation",
[EXIT_REASON_EPT_MISCONFIG] = "EPT misconfiguration",
[EXIT_REASON_INVEPT] = "INVEPT",
[EXIT_REASON_RDTSCP] = "RDTSCP",
[EXIT_REASON_VMX_PREEMPT] = "VMX-preemption timer expired",
[EXIT_REASON_INVVPID] = "INVVPID",
[EXIT_REASON_WBINVD] = "WBINVD",
[EXIT_REASON_XSETBV] = "XSETBV",
[EXIT_REASON_APIC_WRITE] = "APIC write",
[EXIT_REASON_RDRAND] = "RDRAND",
[EXIT_REASON_INVPCID] = "INVPCID",
[EXIT_REASON_VMFUNC] = "VMFUNC",
[EXIT_REASON_ENCLS] = "ENCLS",
[EXIT_REASON_RDSEED] = "RDSEED",
[EXIT_REASON_PM_LOG_FULL] = "Page-modification log full",
[EXIT_REASON_XSAVES] = "XSAVES",
[EXIT_REASON_XRSTORS] = "XRSTORS"
};
typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu);
extern int vmexit_task_switch(struct vmctx *, struct vm_exit *, int *vcpu);
@ -506,14 +575,22 @@ vmexit_spinup_ap(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
#define DEBUG_EPT_MISCONFIG
#ifdef DEBUG_EPT_MISCONFIG
#define EXIT_REASON_EPT_MISCONFIG 49
#define VMCS_GUEST_PHYSICAL_ADDRESS 0x00002400
#define VMCS_IDENT(x) ((x) | 0x80000000)
static uint64_t ept_misconfig_gpa, ept_misconfig_pte[4];
static int ept_misconfig_ptenum;
#endif
static const char *
vmexit_vmx_desc(uint32_t exit_reason)
{
if (exit_reason >= nitems(vmx_exit_reason_desc) ||
vmx_exit_reason_desc[exit_reason] == NULL)
return ("Unknown");
return (vmx_exit_reason_desc[exit_reason]);
}
static int
vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
{
@ -523,7 +600,8 @@ vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
fprintf(stderr, "\tstatus\t\t%d\n", vmexit->u.vmx.status);
fprintf(stderr, "\texit_reason\t%u\n", vmexit->u.vmx.exit_reason);
fprintf(stderr, "\texit_reason\t%u (%s)\n", vmexit->u.vmx.exit_reason,
vmexit_vmx_desc(vmexit->u.vmx.exit_reason));
fprintf(stderr, "\tqualification\t0x%016lx\n",
vmexit->u.vmx.exit_qualification);
fprintf(stderr, "\tinst_type\t\t%d\n", vmexit->u.vmx.inst_type);