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Add support for -enable-kqemu flag

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Previously QEMU enabled KQEMU by default and had -no-kqemu.
0.11.x switched to requiring -enable-kqemu. 0.12.x dropped
kqemu entirely. This patch adds support for -enable-kqemu
so 0.11.x works. It replaces a huge set of if() with a
switch() to make the code a bit more readable.

* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Support
  -enable-kqemu
This commit is contained in:
Daniel P. Berrange 2010-07-23 12:05:32 +01:00
parent 92af69abad
commit 6e44ec7a91
2 changed files with 57 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
src/qemu/qemu_conf.c
View File

@ -1156,6 +1156,8 @@ static unsigned long long qemudComputeCmdFlags(const char *help,
if (strstr(help, "-no-kqemu"))
flags |= QEMUD_CMD_FLAG_KQEMU;
if (strstr(help, "-enable-kqemu"))
flags |= QEMUD_CMD_FLAG_ENABLE_KQEMU;
if (strstr(help, "-no-kvm"))
flags |= QEMUD_CMD_FLAG_KVM;
if (strstr(help, "-enable-kvm"))
@ -3663,6 +3665,7 @@ int qemudBuildCommandLine(virConnectPtr conn,
char boot[VIR_DOMAIN_BOOT_LAST];
struct utsname ut;
int disableKQEMU = 0;
int enableKQEMU = 0;
int disableKVM = 0;
int enableKVM = 0;
int qargc = 0, qarga = 0;
@ -3712,39 +3715,60 @@ int qemudBuildCommandLine(virConnectPtr conn,
emulator = def->emulator;
/* Need to explicitly disable KQEMU if
* 1. Guest domain is 'qemu'
* 2. The qemu binary has the -no-kqemu flag
*/
if ((qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU) &&
def->virtType == VIR_DOMAIN_VIRT_QEMU)
disableKQEMU = 1;
/* Need to explicitly disable KVM if
* 1. Guest domain is 'qemu'
* 2. The qemu binary has the -no-kvm flag
/*
* do not use boot=on for drives when not using KVM since this
* is not supported at all in upstream QEmu.
*/
if ((qemuCmdFlags & QEMUD_CMD_FLAG_KVM) &&
def->virtType == VIR_DOMAIN_VIRT_QEMU) {
disableKVM = 1;
(def->virtType == VIR_DOMAIN_VIRT_QEMU) &&
(qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_BOOT))
qemuCmdFlags -= QEMUD_CMD_FLAG_DRIVE_BOOT;
/*
* do not use boot=on for drives when not using KVM since this
* is not supported at all in upstream QEmu.
*/
if (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE_BOOT)
qemuCmdFlags -= QEMUD_CMD_FLAG_DRIVE_BOOT;
switch (def->virtType) {
case VIR_DOMAIN_VIRT_QEMU:
if (qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU)
disableKQEMU = 1;
if (qemuCmdFlags & QEMUD_CMD_FLAG_KVM)
disableKVM = 1;
break;
case VIR_DOMAIN_VIRT_KQEMU:
if (qemuCmdFlags & QEMUD_CMD_FLAG_KVM)
disableKVM = 1;
if (qemuCmdFlags & QEMUD_CMD_FLAG_ENABLE_KQEMU) {
enableKQEMU = 1;
} else if (!(qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU)) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("the QEMU binary %s does not support kqemu"),
emulator);
}
break;
case VIR_DOMAIN_VIRT_KVM:
if (qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU)
disableKQEMU = 1;
if (qemuCmdFlags & QEMUD_CMD_FLAG_ENABLE_KVM) {
enableKVM = 1;
} else if (!(qemuCmdFlags & QEMUD_CMD_FLAG_KVM)) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("the QEMU binary %s does not support kvm"),
emulator);
}
break;
case VIR_DOMAIN_VIRT_XEN:
/* XXX better check for xenner */
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("the QEMU binary %s does not support %s"),
emulator, virDomainVirtTypeToString(def->virtType));
break;
}
/* Should explicitly enable KVM if
* 1. Guest domain is 'kvm'
* 2. The qemu binary has the -enable-kvm flag
* NOTE: user must be responsible for loading the kvm modules
*/
if ((qemuCmdFlags & QEMUD_CMD_FLAG_ENABLE_KVM) &&
def->virtType == VIR_DOMAIN_VIRT_KVM)
enableKVM = 1;
#define ADD_ARG_SPACE \
do { \
if (qargc == qarga) { \
@ -3858,6 +3882,10 @@ int qemudBuildCommandLine(virConnectPtr conn,
if (disableKQEMU)
ADD_ARG_LIT("-no-kqemu");
else if (enableKQEMU) {
ADD_ARG_LIT("-enable-kqemu");
ADD_ARG_LIT("-kernel-kqemu");
}
if (disableKVM)
ADD_ARG_LIT("-no-kvm");
if (enableKVM)

1
src/qemu/qemu_conf.h
View File

@ -92,6 +92,7 @@ enum qemud_cmd_flags {
QEMUD_CMD_FLAG_PCI_CONFIGFD = (1LL << 36), /* pci-assign.configfd */
QEMUD_CMD_FLAG_NODEFCONFIG = (1LL << 37), /* -nodefconfig */
QEMUD_CMD_FLAG_BOOT_MENU = (1LL << 38), /* -boot menu=on support */
QEMUD_CMD_FLAG_ENABLE_KQEMU = (1LL << 39), /* -enable-kqemu flag */
};
/* Main driver state */