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authorJuergen Gross <jgross@suse.com>2022-10-20 14:25:12 +0300
committerJuergen Gross <jgross@suse.com>2022-11-03 12:39:55 +0300
commit4bff677b30156435afa2cc4c3601b542b4ddd439 (patch)
tree664c920b8ada72df7b82c6d56f644d476828e3b2 /arch/x86
parent354d8a4b165697e6da9585b3f651d87735f30415 (diff)
downloadlinux-4bff677b30156435afa2cc4c3601b542b4ddd439.tar.xz
x86/xen: simplify sysenter and syscall setup
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/xen/setup.c23
1 files changed, 6 insertions, 17 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index cfa99e8f054b..4f4309500559 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -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)