From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/arch/x86/kernel/fpu/init.c | 79 ++++-----------------------------------
1 files changed, 9 insertions(+), 70 deletions(-)
diff --git a/kernel/arch/x86/kernel/fpu/init.c b/kernel/arch/x86/kernel/fpu/init.c
index 9692ccc..ed73f9b 100644
--- a/kernel/arch/x86/kernel/fpu/init.c
+++ b/kernel/arch/x86/kernel/fpu/init.c
@@ -1,10 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* x86 FPU boot time init code:
*/
#include <asm/fpu/internal.h>
#include <asm/tlbflush.h>
#include <asm/setup.h>
-#include <asm/cmdline.h>
#include <linux/sched.h>
#include <linux/sched/task.h>
@@ -49,7 +49,7 @@
fpu__init_cpu_xstate();
}
-static bool fpu__probe_without_cpuid(void)
+static bool __init fpu__probe_without_cpuid(void)
{
unsigned long cr0;
u16 fsw, fcw;
@@ -67,7 +67,7 @@
return fsw == 0 && (fcw & 0x103f) == 0x003f;
}
-static void fpu__init_system_early_generic(struct cpuinfo_x86 *c)
+static void __init fpu__init_system_early_generic(void)
{
if (!boot_cpu_has(X86_FEATURE_CPUID) &&
!test_bit(X86_FEATURE_FPU, (unsigned long *)cpu_caps_cleared)) {
@@ -138,9 +138,6 @@
unsigned int fpu_kernel_xstate_size;
EXPORT_SYMBOL_GPL(fpu_kernel_xstate_size);
-/* Get alignment of the TYPE. */
-#define TYPE_ALIGN(TYPE) offsetof(struct { char x; TYPE test; }, test)
-
/*
* Enforce that 'MEMBER' is the last field of 'TYPE'.
*
@@ -148,8 +145,8 @@
* because that's how C aligns structs.
*/
#define CHECK_MEMBER_AT_END_OF(TYPE, MEMBER) \
- BUILD_BUG_ON(sizeof(TYPE) != ALIGN(offsetofend(TYPE, MEMBER), \
- TYPE_ALIGN(TYPE)))
+ BUILD_BUG_ON(sizeof(TYPE) != \
+ ALIGN(offsetofend(TYPE, MEMBER), _Alignof(TYPE)))
/*
* We append the 'struct fpu' to the task_struct:
@@ -203,12 +200,6 @@
*/
if (!boot_cpu_has(X86_FEATURE_FPU)) {
- /*
- * Disable xsave as we do not support it if i387
- * emulation is enabled.
- */
- setup_clear_cpu_cap(X86_FEATURE_XSAVE);
- setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
fpu_kernel_xstate_size = sizeof(struct swregs_state);
} else {
if (boot_cpu_has(X86_FEATURE_FXSR))
@@ -229,7 +220,8 @@
*/
u64 __init fpu__get_supported_xfeatures_mask(void)
{
- return XCNTXT_MASK;
+ return XFEATURE_MASK_USER_SUPPORTED |
+ XFEATURE_MASK_SUPERVISOR_SUPPORTED;
}
/* Legacy code to initialize eager fpu mode. */
@@ -239,68 +231,15 @@
WARN_ON_FPU(!on_boot_cpu);
on_boot_cpu = 0;
-
- WARN_ON_FPU(current->thread.fpu.initialized);
-}
-
-/*
- * We parse fpu parameters early because fpu__init_system() is executed
- * before parse_early_param().
- */
-static void __init fpu__init_parse_early_param(void)
-{
- char arg[128];
- char *argptr = arg;
- int arglen, res, bit;
-
- if (cmdline_find_option_bool(boot_command_line, "no387"))
- setup_clear_cpu_cap(X86_FEATURE_FPU);
-
- if (cmdline_find_option_bool(boot_command_line, "nofxsr")) {
- setup_clear_cpu_cap(X86_FEATURE_FXSR);
- setup_clear_cpu_cap(X86_FEATURE_FXSR_OPT);
- setup_clear_cpu_cap(X86_FEATURE_XMM);
- }
-
- if (cmdline_find_option_bool(boot_command_line, "noxsave"))
- fpu__xstate_clear_all_cpu_caps();
-
- if (cmdline_find_option_bool(boot_command_line, "noxsaveopt"))
- setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
-
- if (cmdline_find_option_bool(boot_command_line, "noxsaves"))
- setup_clear_cpu_cap(X86_FEATURE_XSAVES);
-
- arglen = cmdline_find_option(boot_command_line, "clearcpuid", arg, sizeof(arg));
- if (arglen <= 0)
- return;
-
- pr_info("Clearing CPUID bits:");
- do {
- res = get_option(&argptr, &bit);
- if (res == 0 || res == 3)
- break;
-
- /* If the argument was too long, the last bit may be cut off */
- if (res == 1 && arglen >= sizeof(arg))
- break;
-
- if (bit >= 0 && bit < NCAPINTS * 32) {
- pr_cont(" " X86_CAP_FMT, x86_cap_flag(bit));
- setup_clear_cpu_cap(bit);
- }
- } while (res == 2);
- pr_cont("\n");
}
/*
* Called on the boot CPU once per system bootup, to set up the initial
* FPU state that is later cloned into all processes:
*/
-void __init fpu__init_system(struct cpuinfo_x86 *c)
+void __init fpu__init_system(void)
{
- fpu__init_parse_early_param();
- fpu__init_system_early_generic(c);
+ fpu__init_system_early_generic();
/*
* The FPU has to be operational for some of the
--
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