diff options
Diffstat (limited to 'arch/x86/kernel/vsmp_64.c')
| -rw-r--r-- | arch/x86/kernel/vsmp_64.c | 118 |
1 files changed, 11 insertions, 107 deletions
diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c index 992f890283e9..73511332bb67 100644 --- a/arch/x86/kernel/vsmp_64.c +++ b/arch/x86/kernel/vsmp_64.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * vSMPowered(tm) systems specific initialization * Copyright (C) 2005 ScaleMP Inc. * - * Use of this code is subject to the terms and conditions of the - * GNU general public license version 2. See "COPYING" or - * http://www.gnu.org/licenses/gpl.html - * * Ravikiran Thirumalai <kiran@scalemp.com>, * Shai Fultheim <shai@scalemp.com> * Paravirt ops integration: Glauber de Oliveira Costa <gcosta@redhat.com>, @@ -26,65 +23,8 @@ #define TOPOLOGY_REGISTER_OFFSET 0x10 -#if defined CONFIG_PCI && defined CONFIG_PARAVIRT -/* - * Interrupt control on vSMPowered systems: - * ~AC is a shadow of IF. If IF is 'on' AC should be 'off' - * and vice versa. - */ - -static unsigned long vsmp_save_fl(void) -{ - unsigned long flags = native_save_fl(); - - if (!(flags & X86_EFLAGS_IF) || (flags & X86_EFLAGS_AC)) - flags &= ~X86_EFLAGS_IF; - return flags; -} -PV_CALLEE_SAVE_REGS_THUNK(vsmp_save_fl); - -static void vsmp_restore_fl(unsigned long flags) -{ - if (flags & X86_EFLAGS_IF) - flags &= ~X86_EFLAGS_AC; - else - flags |= X86_EFLAGS_AC; - native_restore_fl(flags); -} -PV_CALLEE_SAVE_REGS_THUNK(vsmp_restore_fl); - -static void vsmp_irq_disable(void) -{ - unsigned long flags = native_save_fl(); - - native_restore_fl((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC); -} -PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_disable); - -static void vsmp_irq_enable(void) -{ - unsigned long flags = native_save_fl(); - - native_restore_fl((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC)); -} -PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_enable); - -static unsigned __init_or_module vsmp_patch(u8 type, u16 clobbers, void *ibuf, - unsigned long addr, unsigned len) -{ - switch (type) { - case PARAVIRT_PATCH(pv_irq_ops.irq_enable): - case PARAVIRT_PATCH(pv_irq_ops.irq_disable): - case PARAVIRT_PATCH(pv_irq_ops.save_fl): - case PARAVIRT_PATCH(pv_irq_ops.restore_fl): - return paravirt_patch_default(type, clobbers, ibuf, addr, len); - default: - return native_patch(type, clobbers, ibuf, addr, len); - } - -} - -static void __init set_vsmp_pv_ops(void) +#ifdef CONFIG_PCI +static void __init set_vsmp_ctl(void) { void __iomem *address; unsigned int cap, ctl, cfg; @@ -101,6 +41,7 @@ static void __init set_vsmp_pv_ops(void) #ifdef CONFIG_SMP if (cap & ctl & BIT(8)) { ctl &= ~BIT(8); + #ifdef CONFIG_PROC_FS /* Don't let users change irq affinity via procfs */ no_irq_affinity = 1; @@ -108,28 +49,12 @@ static void __init set_vsmp_pv_ops(void) } #endif - if (cap & ctl & (1 << 4)) { - /* Setup irq ops and turn on vSMP IRQ fastpath handling */ - pv_irq_ops.irq_disable = PV_CALLEE_SAVE(vsmp_irq_disable); - pv_irq_ops.irq_enable = PV_CALLEE_SAVE(vsmp_irq_enable); - pv_irq_ops.save_fl = PV_CALLEE_SAVE(vsmp_save_fl); - pv_irq_ops.restore_fl = PV_CALLEE_SAVE(vsmp_restore_fl); - pv_init_ops.patch = vsmp_patch; - ctl &= ~(1 << 4); - } writel(ctl, address + 4); ctl = readl(address + 4); pr_info("vSMP CTL: control set to:0x%08x\n", ctl); early_iounmap(address, 8); } -#else -static void __init set_vsmp_pv_ops(void) -{ -} -#endif - -#ifdef CONFIG_PCI static int is_vsmp = -1; static void __init detect_vsmp_box(void) @@ -145,7 +70,7 @@ static void __init detect_vsmp_box(void) is_vsmp = 1; } -int is_vsmp_box(void) +static int is_vsmp_box(void) { if (is_vsmp != -1) return is_vsmp; @@ -159,15 +84,18 @@ int is_vsmp_box(void) static void __init detect_vsmp_box(void) { } -int is_vsmp_box(void) +static int is_vsmp_box(void) { return 0; } +static void __init set_vsmp_ctl(void) +{ +} #endif static void __init vsmp_cap_cpus(void) { -#if !defined(CONFIG_X86_VSMP) && defined(CONFIG_SMP) +#if !defined(CONFIG_X86_VSMP) && defined(CONFIG_SMP) && defined(CONFIG_PCI) void __iomem *address; unsigned int cfg, topology, node_shift, maxcpus; @@ -199,38 +127,14 @@ static void __init vsmp_cap_cpus(void) #endif } -static int apicid_phys_pkg_id(int initial_apic_id, int index_msb) -{ - return hard_smp_processor_id() >> index_msb; -} - -/* - * In vSMP, all cpus should be capable of handling interrupts, regardless of - * the APIC used. - */ -static void fill_vector_allocation_domain(int cpu, struct cpumask *retmask, - const struct cpumask *mask) -{ - cpumask_setall(retmask); -} - -static void vsmp_apic_post_init(void) -{ - /* need to update phys_pkg_id */ - apic->phys_pkg_id = apicid_phys_pkg_id; - apic->vector_allocation_domain = fill_vector_allocation_domain; -} - void __init vsmp_init(void) { detect_vsmp_box(); if (!is_vsmp_box()) return; - x86_platform.apic_post_init = vsmp_apic_post_init; - vsmp_cap_cpus(); - set_vsmp_pv_ops(); + set_vsmp_ctl(); return; } |