[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Patch "xen: set cpu capabilities from xen_start_kernel()" has been added to the 4.9-stable tree
This is a note to let you know that I've just added the patch titled xen: set cpu capabilities from xen_start_kernel() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: xen-set-cpu-capabilities-from-xen_start_kernel.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. From foo@baz Sat Jun 2 15:10:07 CEST 2018 From: Juergen Gross <jgross@xxxxxxxx> Date: Wed, 30 May 2018 13:09:57 +0200 Subject: xen: set cpu capabilities from xen_start_kernel() To: stable@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx Cc: dwmw@xxxxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, Juergen Gross <jgross@xxxxxxxx> Message-ID: <20180530110958.19413-3-jgross@xxxxxxxx> From: Juergen Gross <jgross@xxxxxxxx> 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@xxxxxxxx> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/xen/enlighten.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -471,6 +471,14 @@ static void __init xen_init_cpuid_mask(v 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); @@ -1631,6 +1639,7 @@ asmlinkage __visible void __init xen_sta xen_init_irq_ops(); xen_init_cpuid_mask(); + xen_init_capabilities(); #ifdef CONFIG_X86_LOCAL_APIC /* @@ -1975,14 +1984,6 @@ 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; @@ -2029,7 +2030,6 @@ const struct hypervisor_x86 x86_hyper_xe .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); Patches currently in stable-queue which might be from jgross@xxxxxxxx are queue-4.9/x86-amd-don-t-set-x86_bug_sysret_ss_attrs-when-running-under-xen.patch queue-4.9/x86-amd-revert-commit-944e0fc51a89c9827b9.patch queue-4.9/xen-set-cpu-capabilities-from-xen_start_kernel.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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