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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 /include/asm-generic/kprobes.h | |
| 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 'include/asm-generic/kprobes.h')
| -rw-r--r-- | include/asm-generic/kprobes.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-generic/kprobes.h b/include/asm-generic/kprobes.h new file mode 100644 index 000000000..16f16963d --- /dev/null +++ b/include/asm-generic/kprobes.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_GENERIC_KPROBES_H +#define _ASM_GENERIC_KPROBES_H + +#if defined(__KERNEL__) && !defined(__ASSEMBLER__) +#ifdef CONFIG_KPROBES +/* + * Blacklist ganerating macro. Specify functions which is not probed + * by using this macro. + */ +# define __NOKPROBE_SYMBOL(fname) \ +static unsigned long __used \ + __section("_kprobe_blacklist") \ + _kbl_addr_##fname = (unsigned long)fname; +# define NOKPROBE_SYMBOL(fname) __NOKPROBE_SYMBOL(fname) +/* Use this to forbid a kprobes attach on very low level functions */ +# define __kprobes notrace __section(".kprobes.text") +# define nokprobe_inline __always_inline +#else +# define NOKPROBE_SYMBOL(fname) +# define __kprobes +# define nokprobe_inline inline +#endif +#endif /* defined(__KERNEL__) && !defined(__ASSEMBLER__) */ + +#endif /* _ASM_GENERIC_KPROBES_H */ |