Merge 4.20-rc5 into usb-next

			causing system reset or hang due to sending

			INIT from AP to BSP.

	disable_counter_freezing [HW]

	perf_v4_pmi=	[X86,INTEL]

			Format: <bool>

			Disable Intel PMU counter freezing feature.

			The feature only exists starting from

			Arch Perfmon v4 (Skylake and newer).

			before loading.

			See Documentation/blockdev/ramdisk.txt.

	psi=		[KNL] Enable or disable pressure stall information

			tracking.

			Format: <bool>

	psmouse.proto=	[HW,MOUSE] Highest PS2 mouse protocol extension to

			probe for; one of (bare|imps|exps|lifebook|any).

	psmouse.rate=	[HW,MOUSE] Set desired mouse report rate, in reports

	spectre_v2=	[X86] Control mitigation of Spectre variant 2

			(indirect branch speculation) vulnerability.

			The default operation protects the kernel from

			user space attacks.

			on   - unconditionally enable

			off  - unconditionally disable

			on   - unconditionally enable, implies

			       spectre_v2_user=on

			off  - unconditionally disable, implies

			       spectre_v2_user=off

			auto - kernel detects whether your CPU model is

			       vulnerable

			CONFIG_RETPOLINE configuration option, and the

			compiler with which the kernel was built.

			Selecting 'on' will also enable the mitigation

			against user space to user space task attacks.

			Selecting 'off' will disable both the kernel and

			the user space protections.

			Specific mitigations can also be selected manually:

			retpoline	  - replace indirect branches

			Not specifying this option is equivalent to

			spectre_v2=auto.

	spectre_v2_user=

			[X86] Control mitigation of Spectre variant 2

		        (indirect branch speculation) vulnerability between

		        user space tasks

			on	- Unconditionally enable mitigations. Is

				  enforced by spectre_v2=on

			off     - Unconditionally disable mitigations. Is

				  enforced by spectre_v2=off

			prctl   - Indirect branch speculation is enabled,

				  but mitigation can be enabled via prctl

				  per thread.  The mitigation control state

				  is inherited on fork.

			prctl,ibpb

				- Like "prctl" above, but only STIBP is

				  controlled per thread. IBPB is issued

				  always when switching between different user

				  space processes.

			seccomp

				- Same as "prctl" above, but all seccomp

				  threads will enable the mitigation unless

				  they explicitly opt out.

			seccomp,ibpb

				- Like "seccomp" above, but only STIBP is

				  controlled per thread. IBPB is issued

				  always when switching between different

				  user space processes.

			auto    - Kernel selects the mitigation depending on

				  the available CPU features and vulnerability.

			Default mitigation:

			If CONFIG_SECCOMP=y then "seccomp", otherwise "prctl"

			Not specifying this option is equivalent to

			spectre_v2_user=auto.

	spec_store_bypass_disable=

			[HW] Control Speculative Store Bypass (SSB) Disable mitigation

			(Speculative Store Bypass vulnerability)

| ARM            | Cortex-A73      | #858921         | ARM64_ERRATUM_858921        |

| ARM            | Cortex-A55      | #1024718        | ARM64_ERRATUM_1024718       |

| ARM            | Cortex-A76      | #1188873        | ARM64_ERRATUM_1188873       |

| ARM            | Cortex-A76      | #1286807        | ARM64_ERRATUM_1286807       |

| ARM            | MMU-500         | #841119,#826419 | N/A                         |

|                |                 |                 |                             |

| Cavium         | ThunderX ITS    | #22375, #24313  | CAVIUM_ERRATUM_22375        |

		"ref" for 19.2 MHz ref clk,

		"com_aux" for phy common block aux clock,

		"ref_aux" for phy reference aux clock,

		For "qcom,ipq8074-qmp-pcie-phy": no clocks are listed.

		For "qcom,msm8996-qmp-pcie-phy" must contain:

			"aux", "cfg_ahb", "ref".

		For "qcom,msm8996-qmp-usb3-phy" must contain:

			"aux", "cfg_ahb", "ref".

		For "qcom,qmp-v3-usb3-phy" must contain:

		For "qcom,sdm845-qmp-usb3-phy" must contain:

			"aux", "cfg_ahb", "ref", "com_aux".

		For "qcom,sdm845-qmp-usb3-uni-phy" must contain:

			"aux", "cfg_ahb", "ref", "com_aux".

		For "qcom,sdm845-qmp-ufs-phy" must contain:

			"ref", "ref_aux".

 - resets: a list of phandles and reset controller specifier pairs,

	   one for each entry in reset-names.

 - reset-names: "phy" for reset of phy block,

		"common" for phy common block reset,

		"cfg" for phy's ahb cfg block reset (Optional).

		"cfg" for phy's ahb cfg block reset.

		For "qcom,ipq8074-qmp-pcie-phy" must contain:

			"phy", "common".

		For "qcom,msm8996-qmp-pcie-phy" must contain:

			"phy", "common", "cfg".

		For "qcom,msm8996-qmp-usb3-phy" must contain

			"phy", "common".

		For "qcom,ipq8074-qmp-pcie-phy" must contain:

		For "qcom,sdm845-qmp-usb3-phy" must contain:

			"phy", "common".

		For "qcom,sdm845-qmp-usb3-uni-phy" must contain:

			"phy", "common".

		For "qcom,sdm845-qmp-ufs-phy": no resets are listed.

 - vdda-phy-supply: Phandle to a regulator supply to PHY core block.

 - vdda-pll-supply: Phandle to 1.8V regulator supply to PHY refclk pll block.

 - #phy-cells: must be 0

Required properties child node of pcie and usb3 qmp phys:

 - clocks: a list of phandles and clock-specifier pairs,

	   one for each entry in clock-names.

 - clock-names: Must contain following for pcie and usb qmp phys:

 - clock-names: Must contain following:

		 "pipe<lane-number>" for pipe clock specific to each lane.

 - clock-output-names: Name of the PHY clock that will be the parent for

		       the above pipe clock.

			(or)

		  "pcie20_phy1_pipe_clk"

Required properties for child node of PHYs with lane reset, AKA:

	"qcom,msm8996-qmp-pcie-phy"

 - resets: a list of phandles and reset controller specifier pairs,

	   one for each entry in reset-names.

 - reset-names: Must contain following for pcie qmp phys:

 - reset-names: Must contain following:

		 "lane<lane-number>" for reset specific to each lane.

Example:

Required properties:

 - compatible: should be "socionext,uniphier-scssi"

 - reg: address and length of the spi master registers

 - #address-cells: must be <1>, see spi-bus.txt

 - #size-cells: must be <0>, see spi-bus.txt

 - clocks: A phandle to the clock for the device.

 - resets: A phandle to the reset control for the device.

 - interrupts: a single interrupt specifier

 - pinctrl-names: should be "default"

 - pinctrl-0: pin control state for the default mode

 - clocks: a phandle to the clock for the device

 - resets: a phandle to the reset control for the device

Example:

spi0: spi@54006000 {

	compatible = "socionext,uniphier-scssi";

	reg = <0x54006000 0x100>;

	#address-cells = <1>;

	#size-cells = <0>;

	interrupts = <0 39 4>;

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_spi0>;

	clocks = <&peri_clk 11>;

	resets = <&peri_rst 11>;

};

   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_ENABLE, 0, 0);

   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_DISABLE, 0, 0);

   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_STORE_BYPASS, PR_SPEC_FORCE_DISABLE, 0, 0);

- PR_SPEC_INDIR_BRANCH: Indirect Branch Speculation in User Processes

                        (Mitigate Spectre V2 style attacks against user processes)

  Invocations:

   * prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, 0, 0, 0);

   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_ENABLE, 0, 0);

   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_DISABLE, 0, 0);

   * prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_FORCE_DISABLE, 0, 0);