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amd64: Eliminate write only cpu_fxsr.

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Reviewed by:		kib
Differential Revision:	https://reviews.freebsd.org/D38289
MFC after:		1 week
This commit is contained in:
Dmitry Chagin 2023-02-01 18:17:06 +03:00
parent 197947e0a3
commit 5c32146723
5 changed files with 3 additions and 3 deletions
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2
sys/amd64/amd64/initcpu.c
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@ -279,7 +279,7 @@ initializecpu(void)
cr4 = rcr4();
if ((cpu_feature & CPUID_XMM) && (cpu_feature & CPUID_FXSR)) {
cr4 |= CR4_FXSR | CR4_XMM;
cpu_fxsr = hw_instruction_sse = 1;
hw_instruction_sse = 1;
}
if (cpu_stdext_feature & CPUID_STDEXT_FSGSBASE)
cr4 |= CR4_FSGSBASE;

1
sys/i386/i386/npx.c
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@ -175,6 +175,7 @@ SYSCTL_INT(_hw, OID_AUTO, lazy_fpu_switch, CTLFLAG_RWTUN | CTLFLAG_NOFETCH,
&lazy_fpu_switch, 0,
"Lazily load FPU context after context switch");
u_int cpu_fxsr; /* SSE enabled */
int use_xsave;
uint64_t xsave_mask;
static uma_zone_t fpu_save_area_zone;

1
sys/i386/include/md_var.h
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@ -36,6 +36,7 @@
#include <x86/x86_var.h>
extern u_int cpu_fxsr;
extern u_int cyrix_did;
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
extern int has_f00f_bug;

1
sys/x86/include/x86_var.h
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@ -53,7 +53,6 @@ extern u_int cpu_stdext_feature;
extern u_int cpu_stdext_feature2;
extern u_int cpu_stdext_feature3;
extern uint64_t cpu_ia32_arch_caps;
extern u_int cpu_fxsr;
extern u_int cpu_high;
extern u_int cpu_id;
extern u_int cpu_max_ext_state_size;

1
sys/x86/x86/identcpu.c
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@ -106,7 +106,6 @@ u_int cpu_procinfo; /* HyperThreading Info / Brand Index / CLFUSH */
u_int cpu_procinfo2; /* Multicore info */
char cpu_vendor[20]; /* CPU Origin code */
u_int cpu_vendor_id; /* CPU vendor ID */
u_int cpu_fxsr; /* SSE enabled */
u_int cpu_mxcsr_mask; /* Valid bits in mxcsr */
u_int cpu_clflush_line_size = 32;
u_int cpu_stdext_feature; /* %ebx */