- 28 10月, 2016 12 次提交
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由 Thomas Huth 提交于
The system and free space NVRAM partitions (for OpenBIOS) are created in exactly the same way as the Mac-style CHRP NVRAM partitions, so we can use the new common helper functions to do this job here, too. Signed-off-by: NThomas Huth <thuth@redhat.com> Tested-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Thomas Huth 提交于
The "system partition" and "free space" partition layouts are defined by the CHRP and LoPAPR specification, and used by OpenBIOS and SLOF. We can re-use this code for other machines that use OpenBIOS and SLOF, too. So let's make this code independent from the MAC NVRAM environment and put it into two proper helper functions. Signed-off-by: NThomas Huth <thuth@redhat.com> Tested-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Michael Roth 提交于
With the addition of "numa_node" properties for PHBs we began advertising NUMA affinity in cases where nb_numa_nodes > 1. Since the default on the guest side is to make no assumptions about PHB NUMA affinity (defaulting to -1), there is still a valid use-case for explicitly defining a PHB's NUMA affinity even when there's just one node. In particular, some workloads make faulty assumptions about /sys/bus/pci/<devid>/numa_node being >= 0, warranting the use of this property as a workaround even if there's just 1 PHB or NUMA node. Enable this use-case by always advertising the PHB's NUMA affinity if "numa_node" has been explicitly set. We could achieve this by relaxing the check to simply be nb_numa_nodes > 0, but even safer would be to check numa_info[nodeid].present explicitly, and to fail at start time for cases where it does not exist. This has an additional affect of no longer advertising PHB NUMA affinity unconditionally if nb_numa_nodes > 1 and "numa_node" property is unset/-1, but since the default value on the guest side for each PHB is also -1, the behavior should be the same for that situation. We could still retain the old behavior if desired, but the decision seems arbitrary, so we take the simpler route. Cc: Alexey Kardashevskiy <aik@ozlabs.ru> Cc: Shivaprasad G. Bhat <shivapbh@in.ibm.com> Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Laurent Vivier 提交于
but disable MSI-X tests on SPAPR as we can't check the result (the memory region used on PC is not readable on SPAPR). Signed-off-by: NLaurent Vivier <lvivier@redhat.com> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Laurent Vivier 提交于
This patch replaces calls to qtest_start() and qtest_end() by calls to qtest_pc_boot() and qtest_shutdown(). This allows to initialize memory allocator and PCI interface functions. This will ease to enable virtio tests on other architectures by only adding a specific qtest_XXX_boot() (like qtest_spapr_boot()). Signed-off-by: NLaurent Vivier <lvivier@redhat.com> Reviewed-by: NGreg Kurz <groug@kaod.org> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Laurent Vivier 提交于
Move the definition to libqos/virtio.h as it must be used only with virtio functions. Add a QVirtioDevice parameter as it will be needed to know if the virtio device is using virtio 1.0 specification and thus is always little-endian (to do) Signed-off-by: NLaurent Vivier <lvivier@redhat.com> Reviewed-by: NGreg Kurz <groug@kaod.org> Reviewed-by: NThomas Huth <thuth@redhat.com> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Laurent Vivier 提交于
This allows to not have to pass bus and device for every virtio functions. Signed-off-by: NLaurent Vivier <lvivier@redhat.com> Reviewed-by: NGreg Kurz <groug@kaod.org> Reviewed-by: NThomas Huth <thuth@redhat.com> [dwg: Fix style nit] Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Laurent Vivier 提交于
qtest_spapr_boot()/qtest_pc_boot()/qtest_boot() call qtest_vboot() and qtest_vboot() calls g_malloc(), and g_malloc() never fails: if memory allocation fails, the application is terminated. Signed-off-by: NLaurent Vivier <lvivier@redhat.com> Reviewed-by: NThomas Huth <thuth@redhat.com> Reviewed-by: NGreg Kurz <groug@kaod.org> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Laurent Vivier 提交于
vs is allocated in qvirtio_scsi_pci_init() and never freed. Signed-off-by: NLaurent Vivier <lvivier@redhat.com> Reviewed-by: NGreg Kurz <groug@kaod.org> Reviewed-by: NThomas Huth <thuth@redhat.com> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Benjamin Herrenschmidt 提交于
Useful to debug interrupt problems. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [clg: - updated for qemu-2.7 - added a test on ->irqs as it is not necessarily allocated (PHB3_MSI) - removed static variable g_xics and replace with a loop on all children to find the xics objects. - rebased on InterruptStatsProvider interface ] Signed-off-by: NCédric Le Goater <clg@kaod.org> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Alexey Kardashevskiy 提交于
The main changes are: * virtio-serial * booting speed imrovement * better PCI bridge support The complete changelog is: > virtio-serial: Fix compile error > scsi: Remove debug functions from scsi-loader.fs > scsi: Remove unused read-6 command > obp-tftp: Remove the ciregs-buffer > libnet: Simplify the net-load arguments passing > libnet: Simplify the Forth-to-C wrapper of ping() > Do not link libnet to net-snk anymore, and remove net-snk from board-qemu > Add a Forth-to-C wrapper for the ping command, too > Link libnet code to Paflof and add a wrapper for netboot() > Remember execution tokens of "write" and "read" for socket operations > Add virtio-serial device support > Generalize output banner write routine > Improve indentation in OF.fs > scsi: implement READ (16) command > rtas: Improve rtas-do-config-@ and rtas-do-config-! a little bit > libnet: Make netapps.h includable from .code files > libnet: Remove unused prototypes from netapps.h > libnet: Fix the printout of the ping command > libnet: Make sure to close sockets when we're done > scsi: implement read-capacity-16 > pci: Fix secondary and subordinate PCI bus enumeration with board-qemu > pci-phb: Fix stack underflow in phb-pci-walk-bridge > paflof: Add a read() function to read keyboard input > paflof: Add socket(), send() and recv() functions to paflof > paflof: Provide get_timer() and set_timer() helper functions > paflof: Add a write_mm_log helper function > paflof: Copy sbrk code from net-snk > paflof: Use CFLAGS from make.rules instead of completely redefining them > Do not include the FCode evaluator by default anymore > Source code beautification of board-qemu/slof/pci-interrupts.fs > Allow PCI devices in PCI bridge slots greater than 4 > Fix bad interrupt pin numbering in interrupt-map property of PCI bridges > Improve SLOF_alloc_mem_aligned() > instance: Fix set-my-args for empty arguments > Fix remaining compiler warnings in sloffs.c > Remove misleading padding fields from ROM header definition > Improve indentation in calculatecrc.h > Do not include calculatecrc.h from assembler files > Remove unused defines in calculatecrc.h > libnet: Re-initialize global variables at the beginning of tftp() > Remove dependency on cpu/@0 for booting > usb: Set XHCI slot speed according to port status > usb: Build correct route string for USB3 devices behind a hub > usb: Initialize USB3 devices on a hub and keep track of hub topology > usb: Increase amount of maximum slot IDs and add a sanity check > usb: Move XHCI port state arrays from header to .c file > tools: add copy functionality > tools: added support to sloffs to read from /dev/slof_flash > tools: added file append functionality > tools: use crc checking code from romfs/tools > tools: added initial version of sloffs > romfs: factored out crc code, to make it usable from other locations > tools: remove unused parts from the Makefile > usb-hid: Fix non-working comma key > fat-files: Fix access to FAT32 dir/files when cluster > 16-bits > virtio-net: fix ring handling in receive > net: Remove remainders of the MTFTP code > net: Move also files from clients/net-snk/app/netapps/ to lib/libnet/ > net: Move files from clients/net-snk/app/netlib/ to lib/libnet/ > net-snk: Get rid of netlib and netapps prefixes in include statements > usb-xhci: assign field4 before conditional > Improve F12 key handling in boot menu > Fix stack underflow that occurs with duplicated ESC in input > rtas-nvram: optimize erase > ipv6: Replace magic number 1500 with ETH_MTU_SIZE (i.e. 1518) > ipv6: Fix NULL pointer dereference in ip6addr_add() > ipv6: Fix memory leak in set_ipv6_address() / ip6_create_ll_address() > ipv6: Clear memory after malloc if necessary > ipv6: Fix possible NULL-pointer dereference in send_ipv6() > ping: use gateway address for routing > ping: add netmask in the ping argument > xhci: fix missing keys from keyboard > xhci: add memory barrier after filling the trb > loaders: Remove netflash command > boot: Remove legacy Forth words for network loading > base: Move cnt-bits and bcd-to-bin to board-js2x folder > base: Move huge-tftp-load variable to obp-tftp package > base: Remove unused IP address conversion functions > virtio: White space cleanup in virtio-9p.c > virtio: Add modern version 1.0 support to 9p driver > virtio: Set a proper name for virtio-9p device tree nodes > pci: Fix mistype in "unkown-bridge" > ipv6: Indent code with tabs, not with spaces > ipv6: send_ipv6() has to return after doing NDP > ipv6: Do not use unitialized MAC address array > ipv6: Add support for sending packets through a router > Remove unused sms code. > virtio-net: initialize to populate mac address > libbootmsg: Do not use '\b' characters when printing checkpoints > dev-null: The "read" function has to return 0 if nothing has been read Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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由 Peter Maydell 提交于
audio: intel-hda: check stream entry count during transfer # gpg: Signature made Thu 27 Oct 2016 15:30:51 BST # gpg: using RSA key 0x4CB6D8EED3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" # Primary key fingerprint: A032 8CFF B93A 17A7 9901 FE7D 4CB6 D8EE D3E8 7138 * remotes/kraxel/tags/pull-audio-20161027-1: audio: intel-hda: check stream entry count during transfer Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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- 27 10月, 2016 3 次提交
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由 Peter Maydell 提交于
cmpxchg emulation of atomics, v8 # gpg: Signature made Wed 26 Oct 2016 16:30:03 BST # gpg: using RSA key 0xAD1270CC4DD0279B # gpg: Good signature from "Richard Henderson <rth7680@gmail.com>" # gpg: aka "Richard Henderson <rth@redhat.com>" # gpg: aka "Richard Henderson <rth@twiddle.net>" # Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC 16A4 AD12 70CC 4DD0 279B * remotes/rth/tags/pull-atomic-20161026: (37 commits) target-alpha: Emulate LL/SC using cmpxchg helpers target-alpha: Introduce MMU_PHYS_IDX target-arm: remove EXCP_STREX + cpu_exclusive_{test, info} linux-user: remove handling of aarch64's EXCP_STREX linux-user: remove handling of ARM's EXCP_STREX target-arm: emulate aarch64's LL/SC using cmpxchg helpers target-arm: emulate SWP with atomic_xchg helper target-arm: emulate LL/SC using cmpxchg helpers target-arm: Rearrange aa32 load and store functions tests: add atomic_add-bench target-i386: remove helper_lock() target-i386: emulate XCHG using atomic helper target-i386: emulate LOCK'ed BTX ops using atomic helpers target-i386: emulate LOCK'ed XADD using atomic helper target-i386: emulate LOCK'ed NEG using cmpxchg helper target-i386: emulate LOCK'ed NOT using atomic helper target-i386: emulate LOCK'ed INC using atomic helper target-i386: emulate LOCK'ed OP instructions using atomic helpers target-i386: emulate LOCK'ed cmpxchg using cmpxchg helpers tcg: Emit barriers with parallel_cpus ... Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> -
由 Peter Maydell 提交于
# gpg: Signature made Wed 26 Oct 2016 03:19:06 BST # gpg: using RSA key 0xEF04965B398D6211 # gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>" # gpg: WARNING: This key is not certified with sufficiently trusted signatures! # gpg: It is not certain that the signature belongs to the owner. # Primary key fingerprint: 215D 46F4 8246 689E C77F 3562 EF04 965B 398D 6211 * remotes/jasowang/tags/net-pull-request: colo-proxy: fix memory leak net: rtl8139: limit processing of ring descriptors net: vmxnet: initialise local tx descriptor e1000e: Don't zero out buffer address in rx descriptor net: rocker: set limit to DMA buffer size net: eepro100: fix memory leak in device uninit tap-bsd: OpenBSD uses tap(4) now net: pcnet: fix source formatting and indentation net: pcnet: check rx/tx descriptor ring length Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> -
由 Peter Maydell 提交于
# gpg: Signature made Tue 25 Oct 2016 19:58:46 BST # gpg: using RSA key 0xF30C38BD3F2FBE3C # gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" # gpg: aka "Laurent Vivier <laurent@vivier.eu>" # gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" # Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C * remotes/vivier/tags/m68k-part1-pull-request: (23 commits) target-m68k: Optimize gen_flush_flags target-m68k: Optimize some comparisons target-m68k: Use setcond for scc target-m68k: Introduce DisasCompare target-m68k: Reorg flags handling target-m68k: Remove incorrect clearing of cc_x target-m68k: Some fixes to SR and flags management target-m68k: Print flags properly target-m68k: update CPU flags management target-m68k: don't update cc_dest in helpers target-m68k: update move to/from ccr/sr target-m68k: remove m68k_cpu_exec_enter() and m68k_cpu_exec_exit() target-m68k: Replace helper_xflag_lt with setcond target-m68k: allow to update flags with operation on words and bytes target-m68k: REG() macro cleanup target-m68k: set PAGE_BITS to 12 for m68k target-m68k: define operand sizes target-m68k: set disassembler mode to 680x0 or coldfire target-m68k: introduce read_imXX() functions target-m68k: manage scaled index ... Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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- 26 10月, 2016 25 次提交
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由 Richard Henderson 提交于
Emulating LL/SC with cmpxchg is not correct, since it can suffer from the ABA problem. However, portable parallel code is written assuming only cmpxchg which means that in practice this is a viable alternative. Signed-off-by: NRichard Henderson <rth@twiddle.net> -
由 Richard Henderson 提交于
Rather than using helpers for physical accesses, use a mmu index. The primary cleanup is with store-conditional on physical addresses. Signed-off-by: NRichard Henderson <rth@twiddle.net> -
由 Emilio G. Cota 提交于
The exception is not emitted anymore; remove it and the associated TCG variables. Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NEmilio G. Cota <cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net> Message-Id: <1467054136-10430-31-git-send-email-cota@braap.org>
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由 Emilio G. Cota 提交于
The exception is not emitted anymore. Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NEmilio G. Cota <cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net> Message-Id: <1467054136-10430-30-git-send-email-cota@braap.org>
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由 Emilio G. Cota 提交于
The exception is not emitted anymore. Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NEmilio G. Cota <cota@braap.org> Signed-off-by: NRichard Henderson <rth@twidle.net> Message-Id: <1467054136-10430-29-git-send-email-cota@braap.org>
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由 Emilio G. Cota 提交于
Emulating LL/SC with cmpxchg is not correct, since it can suffer from the ABA problem. Portable parallel code, however, is written assuming only cmpxchg--and not LL/SC--is available. This means that in practice emulating LL/SC with cmpxchg is a viable alternative. The appended emulates LL/SC pairs in aarch64 with cmpxchg helpers. This works in both user and system mode. In usermode, it avoids pausing all other CPUs to perform the LL/SC pair. The subsequent performance and scalability improvement is significant, as the plots below show. They plot the throughput of atomic_add-bench compiled for ARM and executed on a 64-core x86 machine. Hi-res plots: http://imgur.com/a/JVc8Y atomic_add-bench: 1000000 ops/thread, [0,1] range 18 ++---------+----------+---------+----------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | 16 ++master +-H--+ ++ || | 14 ++ ++ | | | 12 ++| ++ | | | 10 ++++ ++ 8 ++E ++ |+++ | 6 ++ | ++ | | | 4 ++ | ++ | | | 2 +H++E+--- ++ + | +E++----+E+---+--+E+----++E+------+E+------+E++----+E+---+--+E| 0 ++H-H----H-+-----H----+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 1000000 ops/thread, [0,2] range 18 ++---------+----------+---------+----------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | 16 ++master +-H--+ ++ | | | 14 ++E ++ | | | 12 ++| ++ |+++ | 10 ++ | ++ 8 ++ | ++ | | | 6 ++ | ++ | | | 4 ++ | ++ | +E+--- | 2 +H+ +E+-----+++ +++ +++ ---+E+-----+E+------+++ +++ + +E+---+--+E+----++E+------+E+--- ++++ +++ + +E| 0 ++H-H----H-+-----H----+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 1000000 ops/thread, [0,128] range 70 ++---------+----------+---------+----------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | 60 ++master +-H--+ +++ ---+E+-----+E+------+E+ | +E+------E-------+E+--- | | --- +++ | 50 ++ +++--- ++ | -+E+ | 40 ++ +++---- ++ | E- | | --| | 30 ++ -- +++ ++ | +E+ | 20 ++E+ ++ |E+ | | | 10 ++ ++ + + + + + + + | 0 +HH-H----H-+-----H----+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 1000000 ops/thread, [0,1024] range 160 ++---------+---------+----------+---------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | 140 ++master +-H--+ +++ +++ | -+E+-----+E+-------E| 120 ++ +++ ---- +++ | +++ ----E-- | 100 ++ --E--- +++ ++ | +++ ---- +++ | 80 ++ --E-- ++ | ---- +++ | | -+E+ | 60 ++ ---- +++ ++ | +E+- | 40 ++ -- ++ | +E+ | 20 +EE+ ++ +++ + + + + + + | 0 +HH-H---H--+-----H---+----------+---------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads [rth: Rearrange 128-bit cmpxchg helper. Enforce alignment on LL.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-28-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-25-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
Emulating LL/SC with cmpxchg is not correct, since it can suffer from the ABA problem. Portable parallel code, however, is written assuming only cmpxchg--and not LL/SC--is available. This means that in practice emulating LL/SC with cmpxchg is a viable alternative. The appended emulates LL/SC pairs in ARM with cmpxchg helpers. This works in both user and system mode. In usermode, it avoids pausing all other CPUs to perform the LL/SC pair. The subsequent performance and scalability improvement is significant, as the plots below show. They plot the throughput of atomic_add-bench compiled for ARM and executed on a 64-core x86 machine. Hi-res plots: http://imgur.com/a/aNQpB atomic_add-bench: 1000000 ops/thread, [0,1] range 9 ++---------+----------+----------+----------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | 8 +Emaster +-H--+ ++ | | | 7 ++E ++ | | | 6 ++++ ++ | | | 5 ++ | ++ 4 ++ | ++ | | | 3 ++ | ++ | | | 2 ++ | ++ |H++E+--- +++ ---+E+------+E+------+E| 1 +++ +E+-----+E+------+E+------+E+------+E+-- +++ +++ ++ ++H+ + +++ + +++ ++++ + + + | 0 ++--H----H-+-----H----+----------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 1000000 ops/thread, [0,2] range 16 ++---------+----------+---------+----------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | 14 ++master +-H--+ ++ | | | 12 ++| ++ | E | 10 ++| ++ | | | 8 ++++ ++ |E+| | | | | 6 ++ | ++ | | | 4 ++ | ++ | +E+--- +++ +++ +++ ---+E+------+E| 2 +H+ +E+------E-------+E+-----+E+------+E+------+E+-- +++ + | + +++ + ++++ + + + | 0 ++H-H----H-+-----H----+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 1000000 ops/thread, [0,128] range 70 ++---------+----------+---------+----------+----------+----------+---++ +cmpxchg +-E--+ + + + ++++ + | 60 ++master +-H--+ ----E------+E+-------++ | -+E+--- +++ +++ +E| | +++ ---- +++ ++| 50 ++ +++ ---+E+- ++ | -E--- | 40 ++ ---+++ ++ | +++--- | | -+E+ | 30 ++ +++---- ++ | +E+ | 20 ++ +++-- ++ | +E+ | |+E+ | 10 +E+ ++ + + + + + + + | 0 +HH-H----H-+-----H----+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 1000000 ops/thread, [0,1024] range 120 ++---------+---------+----------+---------+----------+----------+---++ +cmpxchg +-E--+ + + + + + | | master +-H--+ ++| 100 ++ ----E+ | +++ ---+E+--- ++| | --E--- +++ | 80 ++ ---- +++ ++ | ---+E+- | 60 ++ -+E+-- ++ | +++ ---- +++ | | -+E+- | 40 ++ +++---- ++ | +++ ---+E+ | | -+E+--- | 20 ++ +E+ ++ |+E+++ | +E+ + + + + + + | 0 +HH-H---H--+-----H---+----------+---------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads [rth: Enforce alignment for ldrexd.] Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-23-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Richard Henderson 提交于
Stop specializing on TARGET_LONG_BITS == 32; unconditionally allocate a temp and expand with tcg_gen_extu_i32_tl. Split out gen_aa32_addr, gen_aa32_frob64, gen_aa32_ld_i32 and gen_aa32_st_i32 as separate interfaces. Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
With this microbenchmark we can measure the overhead of emulating atomic instructions with a configurable degree of contention. The benchmark spawns $n threads, each performing $o atomic ops (additions) in a loop. Each atomic operation is performed on a different cache line (assuming lines are 64b long) that is randomly selected from a range [0, $r). [ Note: each $foo corresponds to a -foo flag ] Signed-off-by: NEmilio G. Cota <cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net> Message-Id: <1467054136-10430-20-git-send-email-cota@braap.org>
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由 Emilio G. Cota 提交于
It's been superseded by the atomic helpers. The use of the atomic helpers provides a significant performance and scalability improvement. Below is the result of running the atomic_add-test microbenchmark with: $ x86_64-linux-user/qemu-x86_64 tests/atomic_add-bench -o 5000000 -r $r -n $n , where $n is the number of threads and $r is the allowed range for the additions. The scenarios measured are: - atomic: implements x86' ADDL with the atomic_add helper (i.e. this patchset) - cmpxchg: implement x86' ADDL with a TCG loop using the cmpxchg helper - master: before this patchset Results sorted in ascending range, i.e. descending degree of contention. Y axis is Throughput in Mops/s. Tests are run on an AMD machine with 64 Opteron 6376 cores. atomic_add-bench: 5000000 ops/thread, [0,1] range 25 ++---------+----------+---------+----------+----------+----------+---++ + atomic +-E--+ + + + + + | |cmpxchg +-H--+ | 20 +Emaster +-N--+ ++ || | |++ | || | 15 +++ ++ |N| | |+| | 10 ++| ++ |+|+ | | | -+E+------ +++ ---+E+------+E+------+E+-----+E+------+E| |+E+E+- +++ +E+------+E+-- | 5 ++|+ ++ |+N+H+--- +++ | ++++N+--+H++----+++ + +++ --++H+------+H+------+H++----+H+---+--- | 0 ++---------+-----H----+---H-----+----------+----------+----------+---H+ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 5000000 ops/thread, [0,2] range 25 ++---------+----------+---------+----------+----------+----------+---++ ++atomic +-E--+ + + + + + | |cmpxchg +-H--+ | 20 ++master +-N--+ ++ |E| | |++ | ||E | 15 ++| ++ |N|| | |+|| ---+E+------+E+-----+E+------+E| 10 ++| | ---+E+------+E+-----+E+--- +++ +++ ||H+E+--+E+-- | |+++++ | | || | 5 ++|+H+-- +++ ++ |+N+ - ---+H+------+H+------ | + +N+--+H++----+H+---+--+H+----++H+--- + + +H+---+--+H| 0 ++---------+----------+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 5000000 ops/thread, [0,8] range 40 ++---------+----------+---------+----------+----------+----------+---++ ++atomic +-E--+ + + + + + | 35 +cmpxchg +-H--+ ++ | master +-N--+ ---+E+------+E+------+E+-----+E+------+E| 30 ++| ---+E+-- +++ ++ | | -+E+--- | 25 ++E ---- +++ ++ |+++++ -+E+ | 20 +E+ E-- +++ ++ |H|+++ | |+| +H+------- | 15 ++H+ ---+++ +H+------ ++ |N++H+-- +++--- +H+------++| 10 ++ +++ - +++ ---+H+ +++ +H+ | | +H+-----+H+------+H+-- | 5 ++| +++ ++ ++N+N+--+N++ + + + + + | 0 ++---------+----------+---------+----------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 5000000 ops/thread, [0,128] range 160 ++---------+---------+----------+---------+----------+----------+---++ + atomic +-E--+ + + + + + | 140 +cmpxchg +-H--+ +++ +++ ++ | master +-N--+ E--------E------+E+------++| 120 ++ --| | +++ E+ | -- +++ +++ ++| 100 ++ - ++ | +++- +++ ++| 80 ++ -+E+ -+H+------+H+------H--------++ | ---- ---- +++ H| | ---+E+-----+E+- ---+H+ ++| 60 ++ +E+--- +++ ---+H+--- ++ | --+++ ---+H+-- | 40 ++ +E+-+H+--- ++ | +H+ | 20 +EE+ ++ +N+ + + + + + + | 0 ++N-N---N--+---------+----------+---------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads atomic_add-bench: 5000000 ops/thread, [0,1024] range 350 ++---------+---------+----------+---------+----------+----------+---++ + atomic +-E--+ + + + + + | 300 +cmpxchg +-H--+ +++ | master +-N--+ +++ || | +++ | ----E| 250 ++ | ----E---- ++ | ----E--- | ---+H| 200 ++ -+E+--- +++ ---+H+--- ++ | ---- -+H+-- | | +E+ +++ ---- +++ | 150 ++ ---+++ ---+H+- ++ | --- -+H+-- | 100 ++ ---+E+ ---- +++ ++ | +++ ---+E+-----+H+- | | -+E+------+H+-- | 50 ++ +E+ ++ +EE+ + + + + + + | 0 ++N-N---N--+---------+----------+---------+----------+----------+---++ 0 10 20 30 40 50 60 Number of threads hi-res: http://imgur.com/a/fMRmq For master I stopped measuring master after 8 threads, because there is little point in measuring the well-known performance collapse of a contended lock. Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-21-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net> -
由 Emilio G. Cota 提交于
Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-19-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
[rth: Avoid redundant qemu_ld in locked case. Fix previously unnoticed incorrect zero-extension of address in register-offset case.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-18-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
[rth: Move load of reg value to common location.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-17-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
[rth: Move redundant qemu_load out of cmpxchg loop.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-16-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
[rth: Avoid qemu_load that's redundant with the atomic op.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-15-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
[rth: Merge gen_inc_locked back into gen_inc to share cc update.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-14-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
[rth: Eliminate some unnecessary temporaries.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-13-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Emilio G. Cota 提交于
The diff here is uglier than necessary. All this does is to turn FOO into: if (s->prefix & PREFIX_LOCK) { BAR } else { FOO } where FOO is the original implementation of an unlocked cmpxchg. [rth: Adjust unlocked cmpxchg to use movcond instead of branches. Adjust helpers to use atomic helpers.] Signed-off-by: NEmilio G. Cota <cota@braap.org> Message-Id: <1467054136-10430-6-git-send-email-cota@braap.org> Signed-off-by: NRichard Henderson <rth@twiddle.net> -
由 Richard Henderson 提交于
Reviewed-by: NEmilio G. Cota <cota@braap.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Richard Henderson 提交于
Allow qemu to build on 32-bit hosts without 64-bit atomic ops. Even if we only allow 32-bit hosts to multi-thread emulate 32-bit guests, we still need some way to handle the 32-bit guest using a 64-bit atomic operation. Do so by dropping back to single-step. Reviewed-by: NEmilio G. Cota <cota@braap.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Richard Henderson 提交于
Force the use of cmpxchg16b on x86_64. Wikipedia suggests that only very old AMD64 (circa 2004) did not have this instruction. Further, it's required by Windows 8 so no new cpus will ever omit it. If we truely care about these, then we could check this at startup time and then avoid executing paths that use it. Reviewed-by: NEmilio G. Cota <cota@braap.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Richard Henderson 提交于
Add all of cmpxchg, op_fetch, fetch_op, and xchg. Handle both endian-ness, and sizes up to 8. Handle expanding non-atomically, when emulating in serial. Reviewed-by: NEmilio G. Cota <cota@braap.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Richard Henderson 提交于
TGT_LE and TGT_BE are not size dependent and do not need to be redefined. The others are no longer used at all. Reviewed-by: NEmilio G. Cota <cota@braap.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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由 Richard Henderson 提交于
Saves 2k code size off of a cold path. Reviewed-by: NEmilio G. Cota <cota@braap.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Signed-off-by: NRichard Henderson <rth@twiddle.net>
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