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x86/xen: simplify sysenter and syscall setup

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xen_enable_sysenter() and xen_enable_syscall() can be simplified a lot.

While at it, switch to use cpu_feature_enabled() instead of
boot_cpu_has().

Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2022-10-20 13:25:12 +02:00
parent 354d8a4b16
commit 4bff677b30
1 changed files with 6 additions and 17 deletions
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23
arch/x86/xen/setup.c
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@ -910,17 +910,9 @@ static int register_callback(unsigned type, const void *func)
void xen_enable_sysenter(void)
{
int ret;
unsigned sysenter_feature;
sysenter_feature = X86_FEATURE_SYSENTER32;
if (!boot_cpu_has(sysenter_feature))
return;
ret = register_callback(CALLBACKTYPE_sysenter, xen_entry_SYSENTER_compat);
if(ret != 0)
setup_clear_cpu_cap(sysenter_feature);
if (cpu_feature_enabled(X86_FEATURE_SYSENTER32) &&
register_callback(CALLBACKTYPE_sysenter, xen_entry_SYSENTER_compat))
setup_clear_cpu_cap(X86_FEATURE_SYSENTER32);
}
void xen_enable_syscall(void)
@ -934,12 +926,9 @@ void xen_enable_syscall(void)
mechanism for syscalls. */
}
if (boot_cpu_has(X86_FEATURE_SYSCALL32)) {
ret = register_callback(CALLBACKTYPE_syscall32,
xen_entry_SYSCALL_compat);
if (ret != 0)
setup_clear_cpu_cap(X86_FEATURE_SYSCALL32);
}
if (cpu_feature_enabled(X86_FEATURE_SYSCALL32) &&
register_callback(CALLBACKTYPE_syscall32, xen_entry_SYSCALL_compat))
setup_clear_cpu_cap(X86_FEATURE_SYSCALL32);
}
static void __init xen_pvmmu_arch_setup(void)