教你读Git——Linux内核版本管理工具

我会带着你远行 2022-08-18 00:50 21阅读 0赞

# arch/x86/kernel/cpu/perf\_event\_amd\_ibs.c | 53 ++++++++++++++++++++++++++----- 1 file changed, 45 insertions(+), 8 deletions(-) \--- a/arch/x86/kernel/cpu/perf\_event\_amd\_ibs.c \+++ b/arch/x86/kernel/cpu/perf\_event\_amd\_ibs.c @@ -9,6 +9,7 @@ \#include <linux/perf\_event.h> \#include <linux/module.h> \#include <linux/pci.h> \+\#include <linux/syscore\_ops.h> \#include <asm/apic.h> @@ -209,6 +210,18 @@ out: return ret; \} \+static void ibs\_eilvt\_setup(void) \+\{  \+ /\* \+ \* Force LVT offset assignment for family 10h: The offsets are \+ \* not assigned by the BIOS for this family, so the OS is \+ \* responsible for doing it. If the OS assignment fails, fall \+ \* back to BIOS settings and try to setup this. \+ \*/ \+ if (boot\_cpu\_data.x86 == 0x10) \+ force\_ibs\_eilvt\_setup(); \+\} \+ static inline int get\_ibs\_lvt\_offset(void) \{ u64 val; @@ -244,6 +257,36 @@ static void clear\_APIC\_ibs(void \*dummy) setup\_APIC\_eilvt(offset, 0, APIC\_EILVT\_MSG\_FIX, 1); \} \+\#ifdef CONFIG\_PM \+ \+static int perf\_ibs\_suspend(void) \+\{  \+ clear\_APIC\_ibs(NULL); \+ return 0; \+\} \+ \+static void perf\_ibs\_resume(void) \+\{  \+ ibs\_eilvt\_setup(); \+ setup\_APIC\_ibs(NULL); \+\} \+ \+static struct syscore\_ops perf\_ibs\_syscore\_ops = \{  \+ .resume = perf\_ibs\_resume, \+ .suspend = perf\_ibs\_suspend, \+\}; \+ \+static void perf\_ibs\_pm\_init(void) \+\{  \+ register\_syscore\_ops(&perf\_ibs\_syscore\_ops); \+\} \+ \+\#else \+ \+static inline void perf\_ibs\_pm\_init(void) \{ \} \+ \+\#endif \+  `static int __cpuinit perf_ibs_cpu_notifier(struct notifier_block *self, unsigned long action, void *hcpu) { @@ -270,18 +313,12 @@ static __init int amd_ibs_init(void) if (!caps) return -ENODEV; /* ibs not supported by the cpu */ - /* - * Force LVT offset assignment for family 10h: The offsets are - * not assigned by the BIOS for this family, so the OS is - * responsible for doing it. If the OS assignment fails, fall - * back to BIOS settings and try to setup this. - */ - if (boot_cpu_data.x86 == 0x10) - force_ibs_eilvt_setup();`  1 file changed, 45 insertions(+), 8 deletions(-)   \--- a/arch/x86/kernel/cpu/perf\_event\_amd\_ibs.c   \+++ b/arch/x86/kernel/cpu/perf\_event\_amd\_ibs.c  这三行是概括。  第一行说一个文件被修改了，添加了45行代码，删除了8行代码。  第二行的‘---’代码修改前的文件。  第三行的‘+++’代表修改后的文件。  @@ -209,6 +210,18 @@ out:  这里的 [‘@@’][Link 1] 标明改动信息，’-209,6 +210,18 @@ out‘意思是在改动前的209行之后的6行，再改动之后成为了新文件里的210行之后的18行。  ’+static void ibs\_eilvt\_setup(void)‘ 这里的’+‘号标明这一行代码是被添加的。  '- if (boot\_cpu\_data.x86 == 0x10)' 标明这一行代码被删除。        #

[Link 1]: mailto:%E2%80%98@@%E2%80%99