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From:   Jiaxun Yang <jiaxun.yang@flygoat.com>
To:     linux-mips@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, tsbogend@alpha.franken.de,
        linux-doc@vger.kernel.org, corbet@lwn.net,
        Jiaxun Yang <jiaxun.yang@flygoat.com>
Subject: [PATCH 3/3] Documentation: kernel-parameters: Add some MIPS parameters
Date:   Sun, 21 May 2023 23:31:24 +0100
Message-Id: <20230521223124.21911-4-jiaxun.yang@flygoat.com>
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Those parameters lives in MIPS kernel since very start.
Document them for convenience.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 .../admin-guide/kernel-parameters.txt         | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 9c502d3aa0cd..67a0c3f7eca3 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -713,6 +713,8 @@
 			Sets the size of memory pool for coherent, atomic dma
 			allocations, by default set to 256K.
 
+	coherentio	[KNL,MIPS] Force enable hardware DMA cache coherency.
+
 	com20020=	[HW,NET] ARCnet - COM20020 chipset
 			Format:
 			<io>[,<irq>[,<nodeID>[,<backplane>[,<ckp>[,<timeout>]]]]]
@@ -3626,6 +3628,8 @@
 
 	nocache		[ARM]
 
+	nocoherentio	[KNL,MIPS] Force enable software DMA cache coherency.
+
 	no_console_suspend
 			[HW] Never suspend the console
 			Disable suspending of consoles during suspend and
@@ -3645,6 +3649,7 @@
 			[KNL] Disable object debugging
 
 	nodsp		[SH] Disable hardware DSP at boot time.
+			[MIPS] Disable DSP ASE at boot time.
 
 	noefi		Disable EFI runtime services support.
 
@@ -3667,6 +3672,8 @@
 
 	nofsgsbase	[X86] Disables FSGSBASE instructions.
 
+	noftlb		[MIPS] Disable Fixed TLB at boot time.
+
 	nofxsr		[BUGS=X86-32] Disables x86 floating point extended
 			register save and restore. The kernel will only save
 			legacy floating-point registers on task switch.
@@ -3678,6 +3685,8 @@
 			in certain environments such as networked servers or
 			real-time systems.
 
+	nohtw		[MIPS] Disable hardware page table walker at boot time.
+
 	no_hash_pointers
 			Force pointers printed to the console or buffers to be
 			unhashed.  By default, when a pointer is printed via %p
@@ -3758,6 +3767,8 @@
 
 	nolapic_timer	[X86-32,APIC] Do not use the local APIC timer.
 
+	noulri          [MIPS] Disable RDHWR ULR access for user space.
+
 	nomca		[IA-64] Disable machine check abort handling
 
 	nomce		[X86-32] Disable Machine Check Exception
@@ -3882,6 +3893,8 @@
 			[X86,PV_OPS] Disable paravirtualized VMware scheduler
 			clock and use the default one.
 
+	nowait		[MIPS] Disable the wait instruction for idle.
+
 	nowatchdog	[KNL] Disable both lockup detectors, i.e.
 			soft-lockup and NMI watchdog (hard-lockup).
 
@@ -3893,6 +3906,8 @@
 			LEGACY_XAPIC_DISABLED bit set in the
 			IA32_XAPIC_DISABLE_STATUS MSR.
 
+	noxpa		[MIPS] Disable XPA (eXtended Physical Addressing) ASE.
+
 	noxsave		[BUGS=X86] Disables x86 extended register state save
 			and restore using xsave. The kernel will fallback to
 			enabling legacy floating-point and sse state.
@@ -3936,6 +3951,8 @@
 
 	nr_uarts=	[SERIAL] maximum number of UARTs to be registered.
 
+	ntlb=		[MIPS] Override max number of TLB entries.
+
 	numa=off 	[KNL, ARM64, PPC, RISCV, SPARC, X86] Disable NUMA, Only
 			set up a single NUMA node spanning all memory.
 
@@ -5273,6 +5290,18 @@
 	rcupdate.rcu_self_test= [KNL]
 			Run the RCU early boot self tests
 
+	rd_size=	[KNL,MIPS]
+			Specify size of initrd in memory.
+			Need to be used with rd_start.
+
+	rd_start=	[KNL,MIPS]
+			Specify a virtual address from which to load the initrd.
+			Must in KSEG0 or XKPHYS space.
+			Need to be used with rd_size.
+
+	rdhwr_noopt	[MIPS] Disable optimization of trap and emulation for
+			"RDHWR v1, $29" instruction.
+
 	rdinit=		[KNL]
 			Format: <full_path>
 			Run specified binary instead of /init from the ramdisk,
-- 
2.39.2 (Apple Git-143)