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authorJakub Kicinski <kuba@kernel.org>2022-12-09 03:07:53 +0300
committerJakub Kicinski <kuba@kernel.org>2022-12-09 05:19:59 +0300
commit837e8ac871499d337212e2161c046f5adf1bad33 (patch)
tree2d7bb495b5ce2bce04bf18afd6a57116391efabc /Documentation
parentff36c447e2330625066d193a25a8f94c1408d9d9 (diff)
parent010b6761a9fc5006267d99abb6f9f196bf5d3d13 (diff)
downloadlinux-837e8ac871499d337212e2161c046f5adf1bad33.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
No conflicts. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml2
-rw-r--r--Documentation/loongarch/booting.rst42
-rw-r--r--Documentation/loongarch/index.rst1
-rw-r--r--Documentation/translations/zh_CN/loongarch/booting.rst48
-rw-r--r--Documentation/translations/zh_CN/loongarch/index.rst1
-rw-r--r--Documentation/virt/kvm/api.rst15
-rw-r--r--Documentation/virt/kvm/halt-polling.rst (renamed from Documentation/virt/kvm/x86/halt-polling.rst)13
-rw-r--r--Documentation/virt/kvm/index.rst1
-rw-r--r--Documentation/virt/kvm/x86/index.rst1
9 files changed, 114 insertions, 10 deletions
diff --git a/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml
index 2ab4642679c0..55c4f94a14d1 100644
--- a/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml
+++ b/Documentation/devicetree/bindings/clock/samsung,exynosautov9-clock.yaml
@@ -148,7 +148,7 @@ allOf:
items:
- const: oscclk
- const: dout_clkcmu_fsys1_bus
- - const: dout_clkcmu_fsys1_mmc_card
+ - const: gout_clkcmu_fsys1_mmc_card
- const: dout_clkcmu_fsys1_usbdrd
- if:
diff --git a/Documentation/loongarch/booting.rst b/Documentation/loongarch/booting.rst
new file mode 100644
index 000000000000..91eccd410478
--- /dev/null
+++ b/Documentation/loongarch/booting.rst
@@ -0,0 +1,42 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=======================
+Booting Linux/LoongArch
+=======================
+
+:Author: Yanteng Si <siyanteng@loongson.cn>
+:Date: 18 Nov 2022
+
+Information passed from BootLoader to kernel
+============================================
+
+LoongArch supports ACPI and FDT. The information that needs to be passed
+to the kernel includes the memmap, the initrd, the command line, optionally
+the ACPI/FDT tables, and so on.
+
+The kernel is passed the following arguments on `kernel_entry` :
+
+ - a0 = efi_boot: `efi_boot` is a flag indicating whether
+ this boot environment is fully UEFI-compliant.
+
+ - a1 = cmdline: `cmdline` is a pointer to the kernel command line.
+
+ - a2 = systemtable: `systemtable` points to the EFI system table.
+ All pointers involved at this stage are in physical addresses.
+
+Header of Linux/LoongArch kernel images
+=======================================
+
+Linux/LoongArch kernel images are EFI images. Being PE files, they have
+a 64-byte header structured like::
+
+ u32 MZ_MAGIC /* "MZ", MS-DOS header */
+ u32 res0 = 0 /* Reserved */
+ u64 kernel_entry /* Kernel entry point */
+ u64 _end - _text /* Kernel image effective size */
+ u64 load_offset /* Kernel image load offset from start of RAM */
+ u64 res1 = 0 /* Reserved */
+ u64 res2 = 0 /* Reserved */
+ u64 res3 = 0 /* Reserved */
+ u32 LINUX_PE_MAGIC /* Magic number */
+ u32 pe_header - _head /* Offset to the PE header */
diff --git a/Documentation/loongarch/index.rst b/Documentation/loongarch/index.rst
index aaba648db907..c779bfa00c05 100644
--- a/Documentation/loongarch/index.rst
+++ b/Documentation/loongarch/index.rst
@@ -9,6 +9,7 @@ LoongArch Architecture
:numbered:
introduction
+ booting
irq-chip-model
features
diff --git a/Documentation/translations/zh_CN/loongarch/booting.rst b/Documentation/translations/zh_CN/loongarch/booting.rst
new file mode 100644
index 000000000000..fb6440c438f0
--- /dev/null
+++ b/Documentation/translations/zh_CN/loongarch/booting.rst
@@ -0,0 +1,48 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/loongarch/booting.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+====================
+启动 Linux/LoongArch
+====================
+
+:作者: 司延腾 <siyanteng@loongson.cn>
+:日期: 2022年11月18日
+
+BootLoader传递给内核的信息
+==========================
+
+LoongArch支持ACPI和FDT启动,需要传递给内核的信息包括memmap、initrd、cmdline、可
+选的ACPI/FDT表等。
+
+内核在 `kernel_entry` 入口处被传递以下参数:
+
+ - a0 = efi_boot: `efi_boot` 是一个标志,表示这个启动环境是否完全符合UEFI
+ 的要求。
+
+ - a1 = cmdline: `cmdline` 是一个指向内核命令行的指针。
+
+ - a2 = systemtable: `systemtable` 指向EFI的系统表,在这个阶段涉及的所有
+ 指针都是物理地址。
+
+Linux/LoongArch内核镜像文件头
+=============================
+
+内核镜像是EFI镜像。作为PE文件,它们有一个64字节的头部结构体,如下所示::
+
+ u32 MZ_MAGIC /* "MZ", MS-DOS 头 */
+ u32 res0 = 0 /* 保留 */
+ u64 kernel_entry /* 内核入口点 */
+ u64 _end - _text /* 内核镜像有效大小 */
+ u64 load_offset /* 加载内核镜像相对内存起始地址的偏移量 */
+ u64 res1 = 0 /* 保留 */
+ u64 res2 = 0 /* 保留 */
+ u64 res3 = 0 /* 保留 */
+ u32 LINUX_PE_MAGIC /* 魔术数 */
+ u32 pe_header - _head /* 到PE头的偏移量 */
diff --git a/Documentation/translations/zh_CN/loongarch/index.rst b/Documentation/translations/zh_CN/loongarch/index.rst
index 7d23eb78379d..0273a08342f7 100644
--- a/Documentation/translations/zh_CN/loongarch/index.rst
+++ b/Documentation/translations/zh_CN/loongarch/index.rst
@@ -14,6 +14,7 @@ LoongArch体系结构
:numbered:
introduction
+ booting
irq-chip-model
features
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index eee9f857a986..896914e3a847 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -7213,14 +7213,13 @@ veto the transition.
:Parameters: args[0] is the maximum poll time in nanoseconds
:Returns: 0 on success; -1 on error
-This capability overrides the kvm module parameter halt_poll_ns for the
-target VM.
-
-VCPU polling allows a VCPU to poll for wakeup events instead of immediately
-scheduling during guest halts. The maximum time a VCPU can spend polling is
-controlled by the kvm module parameter halt_poll_ns. This capability allows
-the maximum halt time to specified on a per-VM basis, effectively overriding
-the module parameter for the target VM.
+KVM_CAP_HALT_POLL overrides the kvm.halt_poll_ns module parameter to set the
+maximum halt-polling time for all vCPUs in the target VM. This capability can
+be invoked at any time and any number of times to dynamically change the
+maximum halt-polling time.
+
+See Documentation/virt/kvm/halt-polling.rst for more information on halt
+polling.
7.21 KVM_CAP_X86_USER_SPACE_MSR
-------------------------------
diff --git a/Documentation/virt/kvm/x86/halt-polling.rst b/Documentation/virt/kvm/halt-polling.rst
index 4922e4a15f18..3fae39b1a5ba 100644
--- a/Documentation/virt/kvm/x86/halt-polling.rst
+++ b/Documentation/virt/kvm/halt-polling.rst
@@ -119,6 +119,19 @@ These module parameters can be set from the debugfs files in:
Note: that these module parameters are system wide values and are not able to
be tuned on a per vm basis.
+Any changes to these parameters will be picked up by new and existing vCPUs the
+next time they halt, with the notable exception of VMs using KVM_CAP_HALT_POLL
+(see next section).
+
+KVM_CAP_HALT_POLL
+=================
+
+KVM_CAP_HALT_POLL is a VM capability that allows userspace to override halt_poll_ns
+on a per-VM basis. VMs using KVM_CAP_HALT_POLL ignore halt_poll_ns completely (but
+still obey halt_poll_ns_grow, halt_poll_ns_grow_start, and halt_poll_ns_shrink).
+
+See Documentation/virt/kvm/api.rst for more information on this capability.
+
Further Notes
=============
diff --git a/Documentation/virt/kvm/index.rst b/Documentation/virt/kvm/index.rst
index e0a2c74e1043..ad13ec55ddfe 100644
--- a/Documentation/virt/kvm/index.rst
+++ b/Documentation/virt/kvm/index.rst
@@ -17,4 +17,5 @@ KVM
locking
vcpu-requests
+ halt-polling
review-checklist
diff --git a/Documentation/virt/kvm/x86/index.rst b/Documentation/virt/kvm/x86/index.rst
index 7ff588826b9f..9ece6b8dc817 100644
--- a/Documentation/virt/kvm/x86/index.rst
+++ b/Documentation/virt/kvm/x86/index.rst
@@ -10,7 +10,6 @@ KVM for x86 systems
amd-memory-encryption
cpuid
errata
- halt-polling
hypercalls
mmu
msr