diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0092-xen-set-cpu-capabilities-from-xen_start_kernel.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0092-xen-set-cpu-capabilities-from-xen_start_kernel.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0092-xen-set-cpu-capabilities-from-xen_start_kernel.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0092-xen-set-cpu-capabilities-from-xen_start_kernel.patch new file mode 100644 index 00000000..7860a717 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0092-xen-set-cpu-capabilities-from-xen_start_kernel.patch @@ -0,0 +1,72 @@ +From 4f306d0db3c6e46b730cba2b9b59a93b46a0a315 Mon Sep 17 00:00:00 2001 +From: Juergen Gross <jgross@suse.com> +Date: Wed, 30 May 2018 13:09:57 +0200 +Subject: [PATCH 92/93] xen: set cpu capabilities from xen_start_kernel() + +Upstream commit: 0808e80cb760de2733c0527d2090ed2205a1eef8 ("xen: set +cpu capabilities from xen_start_kernel()") + +There is no need to set the same capabilities for each cpu +individually. This can easily be done for all cpus when starting the +kernel. + +Signed-off-by: Juergen Gross <jgross@suse.com> +Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/xen/enlighten.c | 18 +++++++++--------- + 1 file changed, 9 insertions(+), 9 deletions(-) + +diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c +index c926db0..01120da 100644 +--- a/arch/x86/xen/enlighten.c ++++ b/arch/x86/xen/enlighten.c +@@ -470,6 +470,14 @@ static void __init xen_init_cpuid_mask(void) + cpuid_leaf1_ecx_set_mask = (1 << (X86_FEATURE_MWAIT % 32)); + } + ++static void __init xen_init_capabilities(void) ++{ ++ if (xen_pv_domain()) { ++ setup_clear_cpu_cap(X86_BUG_SYSRET_SS_ATTRS); ++ setup_force_cpu_cap(X86_FEATURE_XENPV); ++ } ++} ++ + static void xen_set_debugreg(int reg, unsigned long val) + { + HYPERVISOR_set_debugreg(reg, val); +@@ -1629,6 +1637,7 @@ asmlinkage __visible void __init xen_start_kernel(void) + + xen_init_irq_ops(); + xen_init_cpuid_mask(); ++ xen_init_capabilities(); + + #ifdef CONFIG_X86_LOCAL_APIC + /* +@@ -1969,14 +1978,6 @@ bool xen_hvm_need_lapic(void) + } + EXPORT_SYMBOL_GPL(xen_hvm_need_lapic); + +-static void xen_set_cpu_features(struct cpuinfo_x86 *c) +-{ +- if (xen_pv_domain()) { +- clear_cpu_bug(c, X86_BUG_SYSRET_SS_ATTRS); +- set_cpu_cap(c, X86_FEATURE_XENPV); +- } +-} +- + static void xen_pin_vcpu(int cpu) + { + static bool disable_pinning; +@@ -2023,7 +2024,6 @@ const struct hypervisor_x86 x86_hyper_xen = { + .init_platform = xen_hvm_guest_init, + #endif + .x2apic_available = xen_x2apic_para_available, +- .set_cpu_features = xen_set_cpu_features, + .pin_vcpu = xen_pin_vcpu, + }; + EXPORT_SYMBOL(x86_hyper_xen); +-- +2.7.4 + |