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| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /lib/embedded-cmdline.S | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'lib/embedded-cmdline.S')
| -rw-r--r-- | lib/embedded-cmdline.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/embedded-cmdline.S b/lib/embedded-cmdline.S new file mode 100644 index 000000000..bda81b4a4 --- /dev/null +++ b/lib/embedded-cmdline.S @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Embed the build-time-rendered bootconfig "kernel" subtree as a flat + * cmdline string. setup_arch() prepends this to boot_command_line on + * architectures that select ARCH_SUPPORTS_CMDLINE_FROM_BOOTCONFIG. + * + * Copyright (c) 2026 Meta Platforms, Inc. and affiliates + * Copyright (c) 2026 Breno Leitao <leitao@debian.org> + */ + .section .init.rodata.embed_cmdline, "a", %progbits + .global embedded_kernel_cmdline +embedded_kernel_cmdline: + .incbin "lib/embedded_cmdline.bin" + .byte 0 + .global embedded_kernel_cmdline_end +embedded_kernel_cmdline_end: |