Bjørn Mork [Mon, 8 Mar 2010 12:07:14 +0000 (13:07 +0100)]
sdl: improve error message on fatal error
The SDL_SetVideoMode() error condition is easily triggered by a user by
simply configure a guest with a host unsupported display resolution
and attempting to enable fullscreen. Since the error is fatal, adding
a bit of debugging help can't harm.
Sample output with this change:
(qemu) Could not open SDL display (1280x1024x32): No video mode large enough for 1280x1024
The width x height might seem redundant as SDL also provides it in
SDL_GetError(), but I believe there are situations where it is
useful. I.e. if there is some other SDL error. Anyway, redundant
information in fatal error messages has never harmed a single gerbil.
Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Paul Brook [Wed, 17 Mar 2010 02:14:28 +0000 (02:14 +0000)]
Large page TLB flush
QEMU uses a fixed page size for the CPU TLB. If the guest uses large
pages then we effectively split these into multiple smaller pages, and
populate the corresponding TLB entries on demand.
When the guest invalidates the TLB by virtual address we must invalidate
all entries covered by the large page. However the address used to
invalidate the entry may not be present in the QEMU TLB, so we do not
know which regions to clear.
Implementing a full vaiable size TLB is hard and slow, so just keep a
simple address/mask pair to record which addresses may have been mapped by
large pages. If the guest invalidates this region then flush the
whole TLB.
qemu-option: Move the implied first name into QemuOptsList
We sometimes permit omitting the first option name, for example
-device foo is short for -device driver=foo. The name to use
("driver" in the example) is passed as argument to qemu_opts_parse().
For each QemuOptsList, we use at most one such name.
Move the name into QemuOptsList, and pass whether to permit the
abbreviation. This ensures continued consistency, and simplifies the
commit after next in this series.
error: Let converted handlers print in human monitor
While fully converted handlers are not supposed to print anything when
running in a QMP monitor, they are free to print in a human monitor.
For instance, device_add (not yet converted) prints help, and will
continue to do so after conversion.
Moreover, utility functions converted to QError should remain usable
from unconverted handlers.
Two problems:
* handler_audit() complains when a converted handler prints. Limit
that to QMP monitors.
* With QMP, handlers need to pass the error object by way of
monitor_set_error(). However, we do that both for QMP and for the
human monitor. The human monitor prints the error object after the
handler returns. If the handler prints anything else, that output
"overtakes" the error message.
Limit use of monitor_set_error() to QMP monitors. Update
handler_audit() accordingly.
Users can't set them, so qdev_device_help() shouldn't list them. Fix
that. Also make qdev_prop_parse() hide them instead of printing a
meaningless "has no parser" error message.
Their value means nothing to users, so qdev_print_props() shouldn't
print it. Fix by removing their print method.
Users can't create them, so qdev_device_help() shouldn't list them.
Fix that.
Also make qdev_device_add() pretend they don't exist. Before, it
rejected them with a "can't be added via command line" message, which
wasn't quite right for monitor command device_add.
error: Infrastructure to track locations for error reporting
New struct Location holds a location. So far, the only location is
LOC_NONE, so this doesn't do anything useful yet.
Passing the current location all over the place would be too
cumbersome. Hide it away in static cur_loc instead, and provide
accessors. Print it in error_report().
Store it in QError, and print it in qerror_print().
Store it in QemuOpt, for use by qemu_opts_foreach(). This makes
error_report() do the right thing when it runs within
qemu_opts_foreach().
We may still have to store it in other data structures holding user
input for better error messages. Left for another day.
error_report() terminates the message with a newline. Strip it it
from its arguments.
This fixes a few error messages lacking a newline:
net_handle_fd_param()'s "No file descriptor named %s found", and
tap_open()'s "vnet_hdr=1 requested, but no kernel support for
IFF_VNET_HDR available" (all three versions).
There's one place that passes arguments without newlines
intentionally: load_vmstate(). Fix it up.
error: Don't abuse qemu_error() for non-error in scsi_hot_add()
Commit 30d335d6 converted an informational message from
monitor_printf() to qemu_error(), probably because the latter doesn't
need a mon argument. A later commit will make qemu_error() print
additional stuff that is only appropriate for proper errors, and then
this will break. Clean it up.
error: Don't abuse qemu_error() for non-error in qbus_find()
qbus_find() adds an informational line to error messages, and prints
both lines with one qemu_error(). Use error_printf() for the
informational line instead.
While there, simplify: instead of printing buffers filled by
qbus_list_bus() and qbus_list_dev() in one go, make them print it.
error: Don't abuse qemu_error() for non-error in qdev_device_help()
qdev_device_help() prints device information with qemu_error(). A
later commit will make qemu_error() print additional stuff that is
only appropriate for proper errors, and then this will break. Use
error_printf() instead.
While there, simplify: instead of printing a buffer filled by
qdev_print_devinfo() in one go, make qdev_print_devinfo() print it.
qemu_error_sink can either point to a monitor or a file. In practice,
it always points to the current monitor if we have one, else to
stderr. Simply route errors to the current monitor or else to stderr,
and remove qemu_error_sink along with the functions to control it.
Actually, the old code switches the sink slightly later, in
handle_user_command() and handle_qmp_command(), than it gets switched
now, implicitly, by setting the current monitor in monitor_read() and
monitor_control_read(). Likewise, it switches back slightly earlier
(same places). Doesn't make a difference, because there are no calls
of qemu_error() in between.
monitor: Separate "default monitor" and "current monitor" cleanly
Commits 376253ec..731b0364 introduced global variable cur_mon, which
points to the "default monitor" (if any), except during execution of
monitor_read() or monitor_control_read() it points to the monitor from
which we're reading instead (the "current monitor"). Monitor command
handlers run within monitor_read() or monitor_control_read().
Default monitor and current monitor are really separate things, and
squashing them together is confusing and error-prone.
For instance, usb_host_scan() can run both in "info usbhost" and
periodically via usb_host_auto_check(). It prints to cur_mon, which
is what we want in the former case: the monitor executing "info
usbhost". But since that's the default monitor in the latter case, it
periodically spams the default monitor there.
A few places use cur_mon to log stuff to the default monitor. If we
ever log something while cur_mon points to current monitor instead of
default monitor, the log temporarily "jumps" to another monitor.
Whether that can or cannot happen isn't always obvious.
Maybe logging to the default monitor (which may not even exist) is a
bad idea, and we should log to stderr or a logfile instead. But
that's outside the scope of this commit.
Change cur_mon to point to the current monitor. Create new
default_mon to point to the default monitor. Update users of cur_mon
accordingly.
This fixes the periodical spamming of the default monitor by
usb_host_scan(). It also stops "log jumping", should that problem
exist.
Commit 0ecdffbb created pc_boot_set() for use from monitor command
"boot_set", via qemu_boot_set(). pc_boot_set() reports errors to
cur_mon, which works fine for monitor code.
Commit e0f084bf reused the function int reset handler
restore_boot_devices(). Use of cur_mon is problematic in that
context. For instance, the "Too many boot devices for PC" error for
"-boot order=abcdefgh,once=c" goes to the monitor instead of stderr.
The monitor may not even exist.
Aurelien Jarno [Sun, 14 Mar 2010 20:20:59 +0000 (21:20 +0100)]
load_elf: replace the address addend by a translation function
A few machines need to translate the ELF header addresses into physical
addresses. Currently the only possibility is to add a value to the
addresses.
This patch replaces the addend argument by and a translation function
and an opaque passed to the function. A NULL function does not translate
the address.
The patch also convert all machines that have an addend, simplify the
PowerPC kernel loading and fix the MIPS kernel loading using this new
feature. Other machines may benefit from this feature.
Real pcnet device (AT2450) apparently has subsystem
device and vendor id set to 0, this is out of spec
(which requires that vendor id is obtained from PCI SIG)
but windows xp driver seems to need this in order
to associate.
eepro100 uses macros which rely on a specific
local variable name (pci_conf) which is scary.
Some of the uses are wrong or unnecessary,
remove them. The rest are small in number, open-code
them using pci_set_xx functions.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Aurelien Jarno [Sun, 14 Mar 2010 22:01:01 +0000 (23:01 +0100)]
tcg: declare internal helpers as const and pure
TCG internal helpers only access to the values passed in arguments, and
do not modify the CPU internal state. Thus they can be declared as
const and pure.
Aurelien Jarno [Tue, 2 Mar 2010 22:16:36 +0000 (23:16 +0100)]
tcg: add div/rem 32-bit helpers
Some targets like ARM would benefit to use 32-bit helpers for
div/rem/divu/remu.
Create a #define for div2 so that targets can select between
div, div2 and helper implementation. Use the helper version if none
of the #define are present.
Andre Przywara [Thu, 11 Mar 2010 13:39:06 +0000 (14:39 +0100)]
x86/cpuid: fix CPUID levels
Bump up the xlevel number for qemu32 to allow parsing of the processor
name string for this model.
Similiarly the 486 processor should have at least the feature bit
leaf enabled.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Andre Przywara [Thu, 11 Mar 2010 13:39:04 +0000 (14:39 +0100)]
x86/cpuid: Always expose 32 and 64-bit CPUs
Since 64-bit capability is just another CPUID bit we now properly
mask, there is no reason anymore to hide the 64-bit capable CPU
models from a 32-bit only QEMU. All 64-bit CPUs can be used
perfectly in 32-bit legacy mode anyway, so these models also make
sense for 32-bit.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Andre Przywara [Thu, 11 Mar 2010 13:39:03 +0000 (14:39 +0100)]
x86/cpuid: add TCG feature bit trimming
In KVM we trim the user provided CPUID bits to match the host CPU's
one. Introduce a similar feature to QEMU/TCG. Create a mask of TCG's
capabilities and apply it to the user bits.
This allows to let the CPU models reflect their native archetypes.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Andre Przywara [Thu, 11 Mar 2010 13:39:01 +0000 (14:39 +0100)]
x86/cpuid: remove unnecessary kvm_trim function
Correct me if I am wrong, but kvm_trim looks like a really bloated
implementation of a bitwise AND. So remove this function and replace
it with the real stuff(TM).
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Andre Przywara [Thu, 11 Mar 2010 13:38:59 +0000 (14:38 +0100)]
x86/cpuid: add missing CPUID feature flag names
Some CPUID feature flags had no string value, so they could not be
switched on or off from the command line.
Add names for the missing ones mentioned in the current public CPUID
specification from both Intel and AMD. Those only mentioned in the
Linux kernel source I put as comments.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Andre Przywara [Thu, 11 Mar 2010 13:38:55 +0000 (14:38 +0100)]
x86/cpuid: move CPUID functions into separate file
about half of target-i386/helper.c consist of CPUID related functions.
Only one of them is a real TCG helper function. So move the whole
CPUID stuff out of this into a separate file to get better
maintainable parts.
This is only code reordering and should not affect QEMU's
functionality.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Gerd Hoffmann [Wed, 10 Mar 2010 16:30:29 +0000 (17:30 +0100)]
fdc: fix drive property handling.
Fix the floppy controller init wrappers to set the drive properties
only in case the DriveInfo pointers passed in are non NULL. This allows
to set the properties using -global.
Andre Przywara [Mon, 8 Mar 2010 14:43:41 +0000 (15:43 +0100)]
install: honor DESTDIR on sysconfdir population
When creating and populating $sysconfdir, we should prepend $DESTDIR
as we do with all other paths.
Reported-by: Frank Arnold <frank.arnold@amd.com> Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Andre Przywara [Mon, 8 Mar 2010 13:09:48 +0000 (14:09 +0100)]
configure: fix --sysconfdir specification
--sysconfdir requires a parameter (the path), this should be reflected
in the case pattern.
Reported-by: Frank Arnold <frank.arnold@amd.com> Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The TCG code is called through a procedure call using the prologue
and epilogue code. This code does not save and restore enough registers.
The "Procedure Call Standard for the ARM Architecture" says:
A subroutine must preserve the contents of the registers r4-r8, r10,
r11 and SP (and r9 in PCS variants that designate r9 as v6).
The current code only saves and restores r9 to r11, and misses r4 to
r8. The patch fixes that by saving r4 to r12. Theoretically there is
no need to save and restore r12, but an even number of registers have
to be saved as per EABI.
Blue Swirl [Sat, 13 Mar 2010 09:52:19 +0000 (09:52 +0000)]
Fix Sparc host build breakage
Fix error:
CC sparc-bsd-user/op_helper.o
In file included from /src/qemu/tcg/tcg.c:158:
/src/qemu/tcg/sparc/tcg-target.c:728:5: "TARGET_PHYS_ADDR_BITS" is not defined
Blue Swirl [Sat, 13 Mar 2010 09:48:08 +0000 (09:48 +0000)]
Fix more wrong usermode virtual address types
Fixes warning:
CC sparc-bsd-user/exec.o
/src/qemu/exec.c: In function `page_check_range':
/src/qemu/exec.c:2375: warning: comparison is always true due to limited range of data type