Merge android-4.4.109 (8cbe01c) into msm-4.4

* refs/heads/tmp-8cbe01c
  Linux 4.4.109
  mm/vmstat: Make NR_TLB_REMOTE_FLUSH_RECEIVED available even on UP
  n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD)
  x86/smpboot: Remove stale TLB flush invocations
  nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()
  usb: xhci: Add XHCI_TRUST_TX_LENGTH for Renesas uPD720201
  USB: Fix off by one in type-specific length check of BOS SSP capability
  usb: add RESET_RESUME for ELSA MicroLink 56K
  usb: Add device quirk for Logitech HD Pro Webcam C925e
  USB: serial: option: adding support for YUGA CLM920-NC5
  USB: serial: option: add support for Telit ME910 PID 0x1101
  USB: serial: qcserial: add Sierra Wireless EM7565
  USB: serial: ftdi_sio: add id for Airbus DS P8GR
  usbip: vhci: stop printing kernel pointer addresses in messages
  usbip: stub: stop printing kernel pointer addresses in messages
  usbip: fix usbip bind writing random string after command in match_busid
  sock: free skb in skb_complete_tx_timestamp on error
  net: phy: micrel: ksz9031: reconfigure autoneg after phy autoneg workaround
  net: Fix double free and memory corruption in get_net_ns_by_id()
  net: bridge: fix early call to br_stp_change_bridge_id and plug newlink leaks
  ipv4: Fix use-after-free when flushing FIB tables
  sctp: Replace use of sockets_allocated with specified macro.
  net: mvmdio: disable/unprepare clocks in EPROBE_DEFER case
  net: ipv4: fix for a race condition in raw_sendmsg
  tg3: Fix rx hang on MTU change with 5717/5719
  tcp md5sig: Use skb's saddr when replying to an incoming segment
  net: reevalulate autoflowlabel setting after sysctl setting
  net: qmi_wwan: add Sierra EM7565 1199:9091
  netlink: Add netns check on taps
  net: igmp: Use correct source address on IGMPv3 reports
  ipv6: mcast: better catch silly mtu values
  ipv4: igmp: guard against silly MTU values
  kbuild: add '-fno-stack-check' to kernel build options
  x86/mm/64: Fix reboot interaction with CR4.PCIDE
  x86/mm: Enable CR4.PCIDE on supported systems
  x86/mm: Add the 'nopcid' boot option to turn off PCID
  x86/mm: Disable PCID on 32-bit kernels
  x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code
  x86/mm: Reimplement flush_tlb_page() using flush_tlb_mm_range()
  x86/mm: Make flush_tlb_mm_range() more predictable
  x86/mm: Remove flush_tlb() and flush_tlb_current_task()
  x86/vm86/32: Switch to flush_tlb_mm_range() in mark_screen_rdonly()
  ALSA: hda - fix headset mic detection issue on a Dell machine
  ALSA: hda: Drop useless WARN_ON()
  ASoC: twl4030: fix child-node lookup
  ASoC: fsl_ssi: AC'97 ops need regmap, clock and cleaning up on failure
  iw_cxgb4: Only validate the MSN for successful completions
  ring-buffer: Mask out the info bits when returning buffer page length
  tracing: Fix crash when it fails to alloc ring buffer
  tracing: Fix possible double free on failure of allocating trace buffer
  tracing: Remove extra zeroing out of the ring buffer page
  net: mvneta: clear interface link status on port disable
  powerpc/perf: Dereference BHRB entries safely
  kvm: x86: fix RSM when PCID is non-zero
  KVM: X86: Fix load RFLAGS w/o the fixed bit
  spi: xilinx: Detect stall with Unknown commands
  parisc: Hide Diva-built-in serial aux and graphics card
  PCI / PM: Force devices to D0 in pci_pm_thaw_noirq()
  ALSA: usb-audio: Fix the missing ctl name suffix at parsing SU
  ALSA: rawmidi: Avoid racy info ioctl via ctl device
  mfd: twl6040: Fix child-node lookup
  mfd: twl4030-audio: Fix sibling-node lookup
  mfd: cros ec: spi: Don't send first message too soon
  crypto: mcryptd - protect the per-CPU queue with a lock
  ACPI: APEI / ERST: Fix missing error handling in erst_reader()

Change-Id: I3823f793c0c85d1639e9be10358cf70cfcd13afc
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index c84b62956e8d..aa1e7246b06b 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -162,6 +162,24 @@ static int __init x86_mpx_setup(char *s)
 }
 __setup("nompx", x86_mpx_setup);
 
+#ifdef CONFIG_X86_64
+static int __init x86_pcid_setup(char *s)
+{
+	/* require an exact match without trailing characters */
+	if (strlen(s))
+		return 0;
+
+	/* do not emit a message if the feature is not present */
+	if (!boot_cpu_has(X86_FEATURE_PCID))
+		return 1;
+
+	setup_clear_cpu_cap(X86_FEATURE_PCID);
+	pr_info("nopcid: PCID feature disabled\n");
+	return 1;
+}
+__setup("nopcid", x86_pcid_setup);
+#endif
+
 static int __init x86_noinvpcid_setup(char *s)
 {
 	/* noinvpcid doesn't accept parameters */
@@ -303,6 +321,25 @@ static __always_inline void setup_smap(struct cpuinfo_x86 *c)
 	}
 }
 
+static void setup_pcid(struct cpuinfo_x86 *c)
+{
+	if (cpu_has(c, X86_FEATURE_PCID)) {
+		if (cpu_has(c, X86_FEATURE_PGE)) {
+			cr4_set_bits(X86_CR4_PCIDE);
+		} else {
+			/*
+			 * flush_tlb_all(), as currently implemented, won't
+			 * work if PCID is on but PGE is not.  Since that
+			 * combination doesn't exist on real hardware, there's
+			 * no reason to try to fully support it, but it's
+			 * polite to avoid corrupting data if we're on
+			 * an improperly configured VM.
+			 */
+			clear_cpu_cap(c, X86_FEATURE_PCID);
+		}
+	}
+}
+
 /*
  * Some CPU features depend on higher CPUID levels, which may not always
  * be available due to CPUID level capping or broken virtualization
@@ -934,6 +971,9 @@ static void identify_cpu(struct cpuinfo_x86 *c)
 	setup_smep(c);
 	setup_smap(c);
 
+	/* Set up PCID */
+	setup_pcid(c);
+
 	/*
 	 * The vendor-specific functions might have changed features.
 	 * Now we do "generic changes."