96502158a4
Changes in 4.9.294 nfc: fix segfault in nfc_genl_dump_devices_done net/mlx4_en: Update reported link modes for 1/10G parisc/agp: Annotate parisc agp init functions with __init i2c: rk3x: Handle a spurious start completion interrupt flag net: netlink: af_netlink: Prevent empty skb by adding a check on len. tracing: Fix a kmemleak false positive in tracing_map hwmon: (dell-smm) Fix warning on /proc/i8k creation error mac80211: send ADDBA requests using the tid/queue of the aggregation session recordmcount.pl: look for jgnop instruction as well as bcrl on s390 dm btree remove: fix use after free in rebalance_children() nfsd: fix use-after-free due to delegation race soc/tegra: fuse: Fix bitwise vs. logical OR warning igbvf: fix double free in `igbvf_probe` ixgbe: set X550 MDIO speed before talking to PHY USB: gadget: bRequestType is a bitfield, not a enum PCI/MSI: Clear PCI_MSIX_FLAGS_MASKALL on error USB: serial: option: add Telit FN990 compositions timekeeping: Really make sure wall_to_monotonic isn't positive net: systemport: Add global locking for descriptor lifecycle firmware: arm_scpi: Fix string overflow in SCPI genpd driver fuse: annotate lock in fuse_reverse_inval_entry() scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select() net: lan78xx: Avoid unnecessary self assignment ARM: 8805/2: remove unneeded naked function usage mwifiex: Remove unnecessary braces from HostCmd_SET_SEQ_NO_BSS_INFO Input: touchscreen - avoid bitwise vs logical OR warning xen/blkfront: harden blkfront against event channel storms xen/netfront: harden netfront against event channel storms xen/console: harden hvc_xen against event channel storms xen/netback: fix rx queue stall detection xen/netback: don't queue unlimited number of packages Linux 4.9.294 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I1f6f7cacef0a205b7bb06cce5c1ed1691879b2fa
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/*
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* linux/arch/arm/lib/copypage-fa.S
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*
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* Copyright (C) 2005 Faraday Corp.
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* Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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*
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* Based on copypage-v4wb.S:
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* Copyright (C) 1995-1999 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/highmem.h>
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/*
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* Faraday optimised copy_user_page
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*/
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static void fa_copy_user_page(void *kto, const void *kfrom)
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{
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int tmp;
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asm volatile ("\
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1: ldmia %1!, {r3, r4, ip, lr} @ 4\n\
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stmia %0, {r3, r4, ip, lr} @ 4\n\
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mcr p15, 0, %0, c7, c14, 1 @ 1 clean and invalidate D line\n\
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add %0, %0, #16 @ 1\n\
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ldmia %1!, {r3, r4, ip, lr} @ 4\n\
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stmia %0, {r3, r4, ip, lr} @ 4\n\
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mcr p15, 0, %0, c7, c14, 1 @ 1 clean and invalidate D line\n\
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add %0, %0, #16 @ 1\n\
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subs %2, %2, #1 @ 1\n\
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bne 1b @ 1\n\
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mcr p15, 0, %2, c7, c10, 4 @ 1 drain WB"
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: "+&r" (kto), "+&r" (kfrom), "=&r" (tmp)
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: "2" (PAGE_SIZE / 32)
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: "r3", "r4", "ip", "lr");
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}
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void fa_copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma)
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{
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void *kto, *kfrom;
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kto = kmap_atomic(to);
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kfrom = kmap_atomic(from);
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fa_copy_user_page(kto, kfrom);
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kunmap_atomic(kfrom);
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kunmap_atomic(kto);
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}
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/*
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* Faraday optimised clear_user_page
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*
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* Same story as above.
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*/
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void fa_clear_user_highpage(struct page *page, unsigned long vaddr)
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{
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void *ptr, *kaddr = kmap_atomic(page);
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asm volatile("\
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mov r1, %2 @ 1\n\
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mov r2, #0 @ 1\n\
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mov r3, #0 @ 1\n\
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mov ip, #0 @ 1\n\
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mov lr, #0 @ 1\n\
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1: stmia %0, {r2, r3, ip, lr} @ 4\n\
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mcr p15, 0, %0, c7, c14, 1 @ 1 clean and invalidate D line\n\
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add %0, %0, #16 @ 1\n\
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stmia %0, {r2, r3, ip, lr} @ 4\n\
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mcr p15, 0, %0, c7, c14, 1 @ 1 clean and invalidate D line\n\
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add %0, %0, #16 @ 1\n\
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subs r1, r1, #1 @ 1\n\
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bne 1b @ 1\n\
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mcr p15, 0, r1, c7, c10, 4 @ 1 drain WB"
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: "=r" (ptr)
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: "0" (kaddr), "I" (PAGE_SIZE / 32)
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: "r1", "r2", "r3", "ip", "lr");
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kunmap_atomic(kaddr);
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}
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struct cpu_user_fns fa_user_fns __initdata = {
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.cpu_clear_user_highpage = fa_clear_user_highpage,
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.cpu_copy_user_highpage = fa_copy_user_highpage,
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};
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