Changes in 4.9.337 mm/khugepaged: fix GUP-fast interaction by sending IPI mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths block: unhash blkdev part inode when the part is deleted ASoC: ops: Check bounds for second channel in snd_soc_put_volsw_sx() can: sja1000: fix size of OCR_MODE_MASK define ASoC: ops: Correct bounds check for second channel on SX controls udf: Discard preallocation before extending file with a hole udf: Drop unused arguments of udf_delete_aext() udf: Fix preallocation discarding at indirect extent boundary udf: Do not bother looking for prealloc extents if i_lenExtents matches i_size udf: Fix extending file within last block usb: gadget: uvc: Prevent buffer overflow in setup handler USB: serial: cp210x: add Kamstrup RF sniffer PIDs Bluetooth: L2CAP: Fix u8 overflow net: loopback: use NET_NAME_PREDICTABLE for name_assign_type drivers: soc: ti: knav_qmss_queue: Mark knav_acc_firmwares as static arm: dts: spear600: Fix clcd interrupt soc: ti: smartreflex: Fix PM disable depth imbalance in omap_sr_probe ARM: dts: dove: Fix assigned-addresses for every PCIe Root Port ARM: dts: armada-370: Fix assigned-addresses for every PCIe Root Port ARM: dts: armada-xp: Fix assigned-addresses for every PCIe Root Port ARM: dts: armada-375: Fix assigned-addresses for every PCIe Root Port ARM: dts: armada-38x: Fix assigned-addresses for every PCIe Root Port ARM: dts: armada-39x: Fix assigned-addresses for every PCIe Root Port ARM: mmp: fix timer_read delay pstore: Avoid kcore oops by vmap()ing with VM_IOREMAP cpuidle: dt: Return the correct numbers of parsed idle states alpha: fix syscall entry in !AUDUT_SYSCALL case PM: hibernate: Fix mistake in kerneldoc comment fs: don't audit the capability check in simple_xattr_list() perf: Fix possible memleak in pmu_dev_alloc() timerqueue: Use rb_entry_safe() in timerqueue_getnext() ocfs2: fix memory leak in ocfs2_stack_glue_init() MIPS: vpe-mt: fix possible memory leak while module exiting MIPS: vpe-cmp: fix possible memory leak while module exiting PNP: fix name memory leak in pnp_alloc_dev() irqchip: gic-pm: Use pm_runtime_resume_and_get() in gic_probe() libfs: add DEFINE_SIMPLE_ATTRIBUTE_SIGNED for signed value lib/notifier-error-inject: fix error when writing -errno to debugfs file rapidio: fix possible name leaks when rio_add_device() fails rapidio: rio: fix possible name leak in rio_register_mport() ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage() uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix x86/xen: Fix memory leak in xen_init_lock_cpu() MIPS: BCM63xx: Add check for NULL for clk in clk_enable fs: sysv: Fix sysv_nblocks() returns wrong value rapidio: fix possible UAF when kfifo_alloc() fails eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD hfs: Fix OOB Write in hfs_asc2mac rapidio: devices: fix missing put_device in mport_cdev_open wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs() wifi: ath9k: hif_usb: Fix use-after-free in ath9k_hif_usb_reg_in_cb() media: i2c: ad5820: Fix error path media: vivid: fix compose size exceed boundary mtd: Fix device name leak when register device failed in add_mtd_device() ASoC: pxa: fix null-pointer dereference in filter() regulator: core: fix unbalanced of node refcount in regulator_dev_lookup() ima: Fix misuse of dereference of pointer in template_desc_init_fields() wifi: ath10k: Fix return value in ath10k_pci_init() mtd: lpddr2_nvm: Fix possible null-ptr-deref Input: elants_i2c - properly handle the reset GPIO when power is off media: solo6x10: fix possible memory leak in solo_sysfs_init() media: platform: exynos4-is: Fix error handling in fimc_md_init() HID: hid-sensor-custom: set fixed size for custom attributes ALSA: seq: fix undefined behavior in bit shift for SNDRV_SEQ_FILTER_USE_EVENT clk: rockchip: Fix memory leak in rockchip_clk_register_pll() mtd: maps: pxa2xx-flash: fix memory leak in probe media: imon: fix a race condition in send_packet() pinctrl: pinconf-generic: add missing of_node_put() media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() NFSv4.2: Fix a memory stomp in decode_attr_security_label NFSv4: Fix a deadlock between nfs4_open_recover_helper() and delegreturn ALSA: asihpi: fix missing pci_disable_device() drm/radeon: Fix PCI device refcount leak in radeon_atrm_get_bios() drm/amdgpu: Fix PCI device refcount leak in amdgpu_atrm_get_bios() ASoC: pcm512x: Fix PM disable depth imbalance in pcm512x_probe bonding: uninitialized variable in bond_miimon_inspect() regulator: core: fix module refcount leak in set_supply() media: saa7164: fix missing pci_disable_device() ALSA: mts64: fix possible null-ptr-defer in snd_mts64_interrupt SUNRPC: Fix missing release socket in rpc_sockname() mmc: moxart: fix return value check of mmc_add_host() mmc: mxcmmc: fix return value check of mmc_add_host() mmc: rtsx_usb_sdmmc: fix return value check of mmc_add_host() mmc: toshsd: fix return value check of mmc_add_host() mmc: vub300: fix return value check of mmc_add_host() mmc: via-sdmmc: fix return value check of mmc_add_host() mmc: wbsd: fix return value check of mmc_add_host() mmc: mmci: fix return value check of mmc_add_host() media: c8sectpfe: Add of_node_put() when breaking out of loop media: coda: Add check for dcoda_iram_alloc media: coda: Add check for kmalloc wifi: rtl8xxxu: Add __packed to struct rtl8723bu_c2h wifi: brcmfmac: Fix error return code in brcmf_sdio_download_firmware() blktrace: Fix output non-blktrace event when blk_classic option enabled net: vmw_vsock: vmci: Check memcpy_from_msg() net: defxx: Fix missing err handling in dfx_init() drivers: net: qlcnic: Fix potential memory leak in qlcnic_sriov_init() ethernet: s2io: don't call dev_kfree_skb() under spin_lock_irqsave() net: farsync: Fix kmemleak when rmmods farsync net/tunnel: wait until all sk_user_data reader finish before releasing the sock net: apple: mace: don't call dev_kfree_skb() under spin_lock_irqsave() net: apple: bmac: don't call dev_kfree_skb() under spin_lock_irqsave() net: emaclite: don't call dev_kfree_skb() under spin_lock_irqsave() net: ethernet: dnet: don't call dev_kfree_skb() under spin_lock_irqsave() hamradio: don't call dev_kfree_skb() under spin_lock_irqsave() net: amd: lance: don't call dev_kfree_skb() under spin_lock_irqsave() ntb_netdev: Use dev_kfree_skb_any() in interrupt context Bluetooth: btusb: don't call kfree_skb() under spin_lock_irqsave() Bluetooth: hci_qca: don't call kfree_skb() under spin_lock_irqsave() Bluetooth: hci_h5: don't call kfree_skb() under spin_lock_irqsave() Bluetooth: hci_bcsp: don't call kfree_skb() under spin_lock_irqsave() Bluetooth: hci_core: don't call kfree_skb() under spin_lock_irqsave() stmmac: fix potential division by 0 scsi: hpsa: Fix error handling in hpsa_add_sas_host() scsi: hpsa: Fix possible memory leak in hpsa_add_sas_device() scsi: fcoe: Fix possible name leak when device_register() fails scsi: ipr: Fix WARNING in ipr_init() scsi: fcoe: Fix transport not deattached when fcoe_if_init() fails scsi: snic: Fix possible UAF in snic_tgt_create() orangefs: Fix sysfs not cleanup when dev init failed crypto: img-hash - Fix variable dereferenced before check 'hdev->req' hwrng: amd - Fix PCI device refcount leak hwrng: geode - Fix PCI device refcount leak IB/IPoIB: Fix queue count inconsistency for PKEY child interfaces drivers: dio: fix possible memory leak in dio_init() vfio: platform: Do not pass return buffer to ACPI _RST method uio: uio_dmem_genirq: Fix missing unlock in irq configuration uio: uio_dmem_genirq: Fix deadlock between irq config and handling usb: fotg210-udc: Fix ages old endianness issues staging: vme_user: Fix possible UAF in tsi148_dma_list_add serial: amba-pl011: avoid SBSA UART accessing DMACR register serial: pch: Fix PCI device refcount leak in pch_request_dma() serial: sunsab: Fix error handling in sunsab_init() misc: tifm: fix possible memory leak in tifm_7xx1_switch_media() misc: sgi-gru: fix use-after-free error in gru_set_context_option, gru_fault and gru_handle_user_call_os cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter() cxl: fix possible null-ptr-deref in cxl_pci_init_afu|adapter() drivers: mcb: fix resource leak in mcb_probe() mcb: mcb-parse: fix error handing in chameleon_parse_gdd() chardev: fix error handling in cdev_device_add() i2c: pxa-pci: fix missing pci_disable_device() on error in ce4100_i2c_probe staging: rtl8192u: Fix use after free in ieee80211_rx() staging: rtl8192e: Fix potential use-after-free in rtllib_rx_Monitor() vme: Fix error not catched in fake_init() i2c: ismt: Fix an out-of-bounds bug in ismt_access() usb: storage: Add check for kcalloc fbdev: ssd1307fb: Drop optional dependency fbdev: pm2fb: fix missing pci_disable_device() fbdev: via: Fix error in via_core_init() fbdev: vermilion: decrease reference count in error path fbdev: uvesafb: Fixes an error handling path in uvesafb_probe() HSI: omap_ssi_core: fix unbalanced pm_runtime_disable() HSI: omap_ssi_core: fix possible memory leak in ssi_probe() power: supply: fix residue sysfs file in error handle route of __power_supply_register() HSI: omap_ssi_core: Fix error handling in ssi_init() include/uapi/linux/swab: Fix potentially missing __always_inline rtc: snvs: Allow a time difference on clock register read iommu/fsl_pamu: Fix resource leak in fsl_pamu_probe() macintosh: fix possible memory leak in macio_add_one_device() macintosh/macio-adb: check the return value of ioremap() powerpc/52xx: Fix a resource leak in an error handling path powerpc/perf: callchain validate kernel stack pointer bounds powerpc/83xx/mpc832x_rdb: call platform_device_put() in error case in of_fsl_spi_probe() powerpc/hv-gpci: Fix hv_gpci event list selftests/powerpc: Fix resource leaks rtc: st-lpc: Add missing clk_disable_unprepare in st_rtc_probe() nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure mISDN: hfcsusb: don't call dev_kfree_skb/kfree_skb() under spin_lock_irqsave() mISDN: hfcpci: don't call dev_kfree_skb/kfree_skb() under spin_lock_irqsave() mISDN: hfcmulti: don't call dev_kfree_skb/kfree_skb() under spin_lock_irqsave() nfc: pn533: Clear nfc_target before being used r6040: Fix kmemleak in probe and remove openvswitch: Fix flow lookup to use unmasked key skbuff: Account for tail adjustment during pull operations net_sched: reject TCF_EM_SIMPLE case for complex ematch module myri10ge: Fix an error handling path in myri10ge_probe() net: stream: purge sk_error_queue in sk_stream_kill_queues() binfmt_misc: fix shift-out-of-bounds in check_special_flags fs: jfs: fix shift-out-of-bounds in dbAllocAG udf: Avoid double brelse() in udf_rename() fs: jfs: fix shift-out-of-bounds in dbDiscardAG ACPICA: Fix error code path in acpi_ds_call_control_method() nilfs2: fix shift-out-of-bounds/overflow in nilfs_sb2_bad_offset() acct: fix potential integer overflow in encode_comp_t() hfs: fix OOB Read in __hfs_brec_find wifi: ath9k: verify the expected usb_endpoints are present wifi: ar5523: Fix use-after-free on ar5523_cmd() timed out ipmi: fix memleak when unload ipmi driver net: ethernet: ti: Fix return type of netcp_ndo_start_xmit() hamradio: baycom_epp: Fix return type of baycom_send_packet() wifi: brcmfmac: Fix potential shift-out-of-bounds in brcmf_fw_alloc_request() igb: Do not free q_vector unless new one was allocated s390/ctcm: Fix return type of ctc{mp,}m_tx() s390/netiucv: Fix return type of netiucv_tx() s390/lcs: Fix return type of lcs_start_xmit() drm/sti: Use drm_mode_copy() md/raid1: stop mdx_raid1 thread when raid1 array run failed mrp: introduce active flags to prevent UAF when applicant uninit ppp: associate skb with a device at tx media: dvb-frontends: fix leak of memory fw media: dvb-usb: fix memory leak in dvb_usb_adapter_init() blk-mq: fix possible memleak when register 'hctx' failed mmc: f-sdh30: Add quirks for broken timeout clock capability media: si470x: Fix use-after-free in si470x_int_in_callback() clk: st: Fix memory leak in st_of_quadfs_setup() drm/fsl-dcu: Fix return type of fsl_dcu_drm_connector_mode_valid() drm/sti: Fix return type of sti_{dvo,hda,hdmi}_connector_mode_valid() orangefs: Fix kmemleak in orangefs_prepare_debugfs_help_string() ASoC: mediatek: mt8173-rt5650-rt5514: fix refcount leak in mt8173_rt5650_rt5514_dev_probe() ASoC: wm8994: Fix potential deadlock ASoC: rockchip: spdif: Add missing clk_disable_unprepare() in rk_spdif_runtime_resume() ASoC: rt5670: Remove unbalanced pm_runtime_put() HID: wacom: Ensure bootloader PID is usable in hidraw mode reiserfs: Add missing calls to reiserfs_security_free() iio: adc: ad_sigma_delta: do not use internal iio_dev lock gcov: add support for checksum field powerpc/rtas: avoid scheduling in rtas_os_term() HID: plantronics: Additional PIDs for double volume key presses quirk hfsplus: fix bug causing custom uid and gid being unable to be assigned with mount ALSA: line6: correct midi status byte when receiving data from podxt ALSA: line6: fix stack overflow in line6_midi_transmit pnode: terminate at peers of source md: fix a crash in mempool_free mmc: vub300: fix warning - do not call blocking ops when !TASK_RUNNING media: stv0288: use explicitly signed char ktest.pl minconfig: Unset configs instead of just removing them ARM: ux500: do not directly dereference __iomem dm cache: Fix ABBA deadlock between shrink_slab and dm_cache_metadata_abort dm thin: Use last transaction's pmd->root when commit failed dm thin: Fix UAF in run_timer_softirq() dm cache: Fix UAF in destroy() dm cache: set needs_check flag after aborting metadata tracing: Fix infinite loop in tracing_read_pipe on overflowed print_trace_line ARM: 9256/1: NWFPE: avoid compiler-generated __aeabi_uldivmod media: dvb-core: Fix double free in dvb_register_device() cifs: fix confusing debug message PCI/sysfs: Fix double free in error path crypto: n2 - add missing hash statesize iommu/amd: Fix ivrs_acpihid cmdline parsing code parisc: led: Fix potential null-ptr-deref in start_task() device_cgroup: Roll back to original exceptions after copy failure drm/connector: send hotplug uevent on connector cleanup drm/vmwgfx: Validate the box size for the snooped cursor ext4: add inode table check in __ext4_get_inode_loc to aovid possible infinite loop ext4: fix undefined behavior in bit shift for ext4_check_flag_values ext4: fix bug_on in __es_tree_search caused by bad boot loader inode ext4: init quota for 'old.inode' in 'ext4_rename' ext4: fix error code return to user-space in ext4_get_branch() ext4: avoid BUG_ON when creating xattrs ext4: initialize quota before expanding inode in setproject ioctl Linux 4.9.337 Change-Id: I923e3fef499ae1688b25c70a1a805b55a9f4f027 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
522 lines
11 KiB
C
522 lines
11 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
|
|
* Copyright (C) 2013 Imagination Technologies Ltd.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/mipsmtregs.h>
|
|
#include <asm/mips_mt.h>
|
|
#include <asm/vpe.h>
|
|
|
|
static int major;
|
|
|
|
/* The number of TCs and VPEs physically available on the core */
|
|
static int hw_tcs, hw_vpes;
|
|
|
|
/* We are prepared so configure and start the VPE... */
|
|
int vpe_run(struct vpe *v)
|
|
{
|
|
unsigned long flags, val, dmt_flag;
|
|
struct vpe_notifications *notifier;
|
|
unsigned int vpeflags;
|
|
struct tc *t;
|
|
|
|
/* check we are the Master VPE */
|
|
local_irq_save(flags);
|
|
val = read_c0_vpeconf0();
|
|
if (!(val & VPECONF0_MVP)) {
|
|
pr_warn("VPE loader: only Master VPE's are able to config MT\n");
|
|
local_irq_restore(flags);
|
|
|
|
return -1;
|
|
}
|
|
|
|
dmt_flag = dmt();
|
|
vpeflags = dvpe();
|
|
|
|
if (list_empty(&v->tc)) {
|
|
evpe(vpeflags);
|
|
emt(dmt_flag);
|
|
local_irq_restore(flags);
|
|
|
|
pr_warn("VPE loader: No TC's associated with VPE %d\n",
|
|
v->minor);
|
|
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
t = list_first_entry(&v->tc, struct tc, tc);
|
|
|
|
/* Put MVPE's into 'configuration state' */
|
|
set_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
settc(t->index);
|
|
|
|
/* should check it is halted, and not activated */
|
|
if ((read_tc_c0_tcstatus() & TCSTATUS_A) ||
|
|
!(read_tc_c0_tchalt() & TCHALT_H)) {
|
|
evpe(vpeflags);
|
|
emt(dmt_flag);
|
|
local_irq_restore(flags);
|
|
|
|
pr_warn("VPE loader: TC %d is already active!\n",
|
|
t->index);
|
|
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
/*
|
|
* Write the address we want it to start running from in the TCPC
|
|
* register.
|
|
*/
|
|
write_tc_c0_tcrestart((unsigned long)v->__start);
|
|
write_tc_c0_tccontext((unsigned long)0);
|
|
|
|
/*
|
|
* Mark the TC as activated, not interrupt exempt and not dynamically
|
|
* allocatable
|
|
*/
|
|
val = read_tc_c0_tcstatus();
|
|
val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A;
|
|
write_tc_c0_tcstatus(val);
|
|
|
|
write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H);
|
|
|
|
/*
|
|
* The sde-kit passes 'memsize' to __start in $a3, so set something
|
|
* here... Or set $a3 to zero and define DFLT_STACK_SIZE and
|
|
* DFLT_HEAP_SIZE when you compile your program
|
|
*/
|
|
mttgpr(6, v->ntcs);
|
|
mttgpr(7, physical_memsize);
|
|
|
|
/* set up VPE1 */
|
|
/*
|
|
* bind the TC to VPE 1 as late as possible so we only have the final
|
|
* VPE registers to set up, and so an EJTAG probe can trigger on it
|
|
*/
|
|
write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1);
|
|
|
|
write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA));
|
|
|
|
back_to_back_c0_hazard();
|
|
|
|
/* Set up the XTC bit in vpeconf0 to point at our tc */
|
|
write_vpe_c0_vpeconf0((read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC))
|
|
| (t->index << VPECONF0_XTC_SHIFT));
|
|
|
|
back_to_back_c0_hazard();
|
|
|
|
/* enable this VPE */
|
|
write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA);
|
|
|
|
/* clear out any left overs from a previous program */
|
|
write_vpe_c0_status(0);
|
|
write_vpe_c0_cause(0);
|
|
|
|
/* take system out of configuration state */
|
|
clear_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
/*
|
|
* SMVP kernels manage VPE enable independently, but uniprocessor
|
|
* kernels need to turn it on, even if that wasn't the pre-dvpe() state.
|
|
*/
|
|
#ifdef CONFIG_SMP
|
|
evpe(vpeflags);
|
|
#else
|
|
evpe(EVPE_ENABLE);
|
|
#endif
|
|
emt(dmt_flag);
|
|
local_irq_restore(flags);
|
|
|
|
list_for_each_entry(notifier, &v->notify, list)
|
|
notifier->start(VPE_MODULE_MINOR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void cleanup_tc(struct tc *tc)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int mtflags, vpflags;
|
|
int tmp;
|
|
|
|
local_irq_save(flags);
|
|
mtflags = dmt();
|
|
vpflags = dvpe();
|
|
/* Put MVPE's into 'configuration state' */
|
|
set_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
settc(tc->index);
|
|
tmp = read_tc_c0_tcstatus();
|
|
|
|
/* mark not allocated and not dynamically allocatable */
|
|
tmp &= ~(TCSTATUS_A | TCSTATUS_DA);
|
|
tmp |= TCSTATUS_IXMT; /* interrupt exempt */
|
|
write_tc_c0_tcstatus(tmp);
|
|
|
|
write_tc_c0_tchalt(TCHALT_H);
|
|
mips_ihb();
|
|
|
|
clear_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
evpe(vpflags);
|
|
emt(mtflags);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/* module wrapper entry points */
|
|
/* give me a vpe */
|
|
void *vpe_alloc(void)
|
|
{
|
|
int i;
|
|
struct vpe *v;
|
|
|
|
/* find a vpe */
|
|
for (i = 1; i < MAX_VPES; i++) {
|
|
v = get_vpe(i);
|
|
if (v != NULL) {
|
|
v->state = VPE_STATE_INUSE;
|
|
return v;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(vpe_alloc);
|
|
|
|
/* start running from here */
|
|
int vpe_start(void *vpe, unsigned long start)
|
|
{
|
|
struct vpe *v = vpe;
|
|
|
|
v->__start = start;
|
|
return vpe_run(v);
|
|
}
|
|
EXPORT_SYMBOL(vpe_start);
|
|
|
|
/* halt it for now */
|
|
int vpe_stop(void *vpe)
|
|
{
|
|
struct vpe *v = vpe;
|
|
struct tc *t;
|
|
unsigned int evpe_flags;
|
|
|
|
evpe_flags = dvpe();
|
|
|
|
t = list_entry(v->tc.next, struct tc, tc);
|
|
if (t != NULL) {
|
|
settc(t->index);
|
|
write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA);
|
|
}
|
|
|
|
evpe(evpe_flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vpe_stop);
|
|
|
|
/* I've done with it thank you */
|
|
int vpe_free(void *vpe)
|
|
{
|
|
struct vpe *v = vpe;
|
|
struct tc *t;
|
|
unsigned int evpe_flags;
|
|
|
|
t = list_entry(v->tc.next, struct tc, tc);
|
|
if (t == NULL)
|
|
return -ENOEXEC;
|
|
|
|
evpe_flags = dvpe();
|
|
|
|
/* Put MVPE's into 'configuration state' */
|
|
set_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
settc(t->index);
|
|
write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~VPECONF0_VPA);
|
|
|
|
/* halt the TC */
|
|
write_tc_c0_tchalt(TCHALT_H);
|
|
mips_ihb();
|
|
|
|
/* mark the TC unallocated */
|
|
write_tc_c0_tcstatus(read_tc_c0_tcstatus() & ~TCSTATUS_A);
|
|
|
|
v->state = VPE_STATE_UNUSED;
|
|
|
|
clear_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
evpe(evpe_flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vpe_free);
|
|
|
|
static ssize_t store_kill(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct vpe *vpe = get_vpe(aprp_cpu_index());
|
|
struct vpe_notifications *notifier;
|
|
|
|
list_for_each_entry(notifier, &vpe->notify, list)
|
|
notifier->stop(aprp_cpu_index());
|
|
|
|
release_progmem(vpe->load_addr);
|
|
cleanup_tc(get_tc(aprp_cpu_index()));
|
|
vpe_stop(vpe);
|
|
vpe_free(vpe);
|
|
|
|
return len;
|
|
}
|
|
static DEVICE_ATTR(kill, S_IWUSR, NULL, store_kill);
|
|
|
|
static ssize_t ntcs_show(struct device *cd, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct vpe *vpe = get_vpe(aprp_cpu_index());
|
|
|
|
return sprintf(buf, "%d\n", vpe->ntcs);
|
|
}
|
|
|
|
static ssize_t ntcs_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct vpe *vpe = get_vpe(aprp_cpu_index());
|
|
unsigned long new;
|
|
int ret;
|
|
|
|
ret = kstrtoul(buf, 0, &new);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (new == 0 || new > (hw_tcs - aprp_cpu_index()))
|
|
return -EINVAL;
|
|
|
|
vpe->ntcs = new;
|
|
|
|
return len;
|
|
}
|
|
static DEVICE_ATTR_RW(ntcs);
|
|
|
|
static struct attribute *vpe_attrs[] = {
|
|
&dev_attr_kill.attr,
|
|
&dev_attr_ntcs.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(vpe);
|
|
|
|
static void vpe_device_release(struct device *cd)
|
|
{
|
|
}
|
|
|
|
static struct class vpe_class = {
|
|
.name = "vpe",
|
|
.owner = THIS_MODULE,
|
|
.dev_release = vpe_device_release,
|
|
.dev_groups = vpe_groups,
|
|
};
|
|
|
|
static struct device vpe_device;
|
|
|
|
int __init vpe_module_init(void)
|
|
{
|
|
unsigned int mtflags, vpflags;
|
|
unsigned long flags, val;
|
|
struct vpe *v = NULL;
|
|
struct tc *t;
|
|
int tc, err;
|
|
|
|
if (!cpu_has_mipsmt) {
|
|
pr_warn("VPE loader: not a MIPS MT capable processor\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (vpelimit == 0) {
|
|
pr_warn("No VPEs reserved for AP/SP, not initialize VPE loader\n"
|
|
"Pass maxvpes=<n> argument as kernel argument\n");
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (aprp_cpu_index() == 0) {
|
|
pr_warn("No TCs reserved for AP/SP, not initialize VPE loader\n"
|
|
"Pass maxtcs=<n> argument as kernel argument\n");
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
major = register_chrdev(0, VPE_MODULE_NAME, &vpe_fops);
|
|
if (major < 0) {
|
|
pr_warn("VPE loader: unable to register character device\n");
|
|
return major;
|
|
}
|
|
|
|
err = class_register(&vpe_class);
|
|
if (err) {
|
|
pr_err("vpe_class registration failed\n");
|
|
goto out_chrdev;
|
|
}
|
|
|
|
device_initialize(&vpe_device);
|
|
vpe_device.class = &vpe_class,
|
|
vpe_device.parent = NULL,
|
|
dev_set_name(&vpe_device, "vpe1");
|
|
vpe_device.devt = MKDEV(major, VPE_MODULE_MINOR);
|
|
err = device_add(&vpe_device);
|
|
if (err) {
|
|
pr_err("Adding vpe_device failed\n");
|
|
goto out_class;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
mtflags = dmt();
|
|
vpflags = dvpe();
|
|
|
|
/* Put MVPE's into 'configuration state' */
|
|
set_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
val = read_c0_mvpconf0();
|
|
hw_tcs = (val & MVPCONF0_PTC) + 1;
|
|
hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
|
|
|
|
for (tc = aprp_cpu_index(); tc < hw_tcs; tc++) {
|
|
/*
|
|
* Must re-enable multithreading temporarily or in case we
|
|
* reschedule send IPIs or similar we might hang.
|
|
*/
|
|
clear_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
evpe(vpflags);
|
|
emt(mtflags);
|
|
local_irq_restore(flags);
|
|
t = alloc_tc(tc);
|
|
if (!t) {
|
|
err = -ENOMEM;
|
|
goto out_dev;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
mtflags = dmt();
|
|
vpflags = dvpe();
|
|
set_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
/* VPE's */
|
|
if (tc < hw_tcs) {
|
|
settc(tc);
|
|
|
|
v = alloc_vpe(tc);
|
|
if (v == NULL) {
|
|
pr_warn("VPE: unable to allocate VPE\n");
|
|
goto out_reenable;
|
|
}
|
|
|
|
v->ntcs = hw_tcs - aprp_cpu_index();
|
|
|
|
/* add the tc to the list of this vpe's tc's. */
|
|
list_add(&t->tc, &v->tc);
|
|
|
|
/* deactivate all but vpe0 */
|
|
if (tc >= aprp_cpu_index()) {
|
|
unsigned long tmp = read_vpe_c0_vpeconf0();
|
|
|
|
tmp &= ~VPECONF0_VPA;
|
|
|
|
/* master VPE */
|
|
tmp |= VPECONF0_MVP;
|
|
write_vpe_c0_vpeconf0(tmp);
|
|
}
|
|
|
|
/* disable multi-threading with TC's */
|
|
write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() &
|
|
~VPECONTROL_TE);
|
|
|
|
if (tc >= vpelimit) {
|
|
/*
|
|
* Set config to be the same as vpe0,
|
|
* particularly kseg0 coherency alg
|
|
*/
|
|
write_vpe_c0_config(read_c0_config());
|
|
}
|
|
}
|
|
|
|
/* TC's */
|
|
t->pvpe = v; /* set the parent vpe */
|
|
|
|
if (tc >= aprp_cpu_index()) {
|
|
unsigned long tmp;
|
|
|
|
settc(tc);
|
|
|
|
/*
|
|
* A TC that is bound to any other VPE gets bound to
|
|
* VPE0, ideally I'd like to make it homeless but it
|
|
* doesn't appear to let me bind a TC to a non-existent
|
|
* VPE. Which is perfectly reasonable.
|
|
*
|
|
* The (un)bound state is visible to an EJTAG probe so
|
|
* may notify GDB...
|
|
*/
|
|
tmp = read_tc_c0_tcbind();
|
|
if (tmp & TCBIND_CURVPE) {
|
|
/* tc is bound >vpe0 */
|
|
write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE);
|
|
|
|
t->pvpe = get_vpe(0); /* set the parent vpe */
|
|
}
|
|
|
|
/* halt the TC */
|
|
write_tc_c0_tchalt(TCHALT_H);
|
|
mips_ihb();
|
|
|
|
tmp = read_tc_c0_tcstatus();
|
|
|
|
/* mark not activated and not dynamically allocatable */
|
|
tmp &= ~(TCSTATUS_A | TCSTATUS_DA);
|
|
tmp |= TCSTATUS_IXMT; /* interrupt exempt */
|
|
write_tc_c0_tcstatus(tmp);
|
|
}
|
|
}
|
|
|
|
out_reenable:
|
|
/* release config state */
|
|
clear_c0_mvpcontrol(MVPCONTROL_VPC);
|
|
|
|
evpe(vpflags);
|
|
emt(mtflags);
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
|
|
out_dev:
|
|
device_del(&vpe_device);
|
|
|
|
out_class:
|
|
put_device(&vpe_device);
|
|
class_unregister(&vpe_class);
|
|
|
|
out_chrdev:
|
|
unregister_chrdev(major, VPE_MODULE_NAME);
|
|
|
|
return err;
|
|
}
|
|
|
|
void __exit vpe_module_exit(void)
|
|
{
|
|
struct vpe *v, *n;
|
|
|
|
device_unregister(&vpe_device);
|
|
class_unregister(&vpe_class);
|
|
unregister_chrdev(major, VPE_MODULE_NAME);
|
|
|
|
/* No locking needed here */
|
|
list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) {
|
|
if (v->state != VPE_STATE_UNUSED)
|
|
release_vpe(v);
|
|
}
|
|
}
|