x86/vsmp: Remove dependency on pv_irq_ops
vSMP dependency on pv_irq_ops has been removed some years ago, but the code still deals with pv_irq_ops. In short, "cap & ctl & (1 << 4)" is always returning 0, so all PARAVIRT/PARAVIRT_XXL code related to that can be removed. However, the rest of the code depends on CONFIG_PCI, so fix it accordingly. Rename set_vsmp_pv_ops to set_vsmp_ctl as the original name does not make sense anymore. Signed-off-by: Eial Czerwacki <eial@scalemp.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Shai Fultheim <shai@scalemp.com> Cc: Juergen Gross <jgross@suse.com> Link: https://lkml.kernel.org/r/1541439114-28297-1-git-send-email-eial@scalemp.com
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@ -525,7 +525,6 @@ config X86_VSMP
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bool "ScaleMP vSMP"
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select HYPERVISOR_GUEST
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select PARAVIRT
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select PARAVIRT_XXL
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depends on X86_64 && PCI
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depends on X86_EXTENDED_PLATFORM
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depends on SMP
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@ -26,65 +26,8 @@
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#define TOPOLOGY_REGISTER_OFFSET 0x10
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#if defined CONFIG_PCI && defined CONFIG_PARAVIRT_XXL
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/*
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* Interrupt control on vSMPowered systems:
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* ~AC is a shadow of IF. If IF is 'on' AC should be 'off'
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* and vice versa.
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*/
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asmlinkage __visible unsigned long vsmp_save_fl(void)
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{
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unsigned long flags = native_save_fl();
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if (!(flags & X86_EFLAGS_IF) || (flags & X86_EFLAGS_AC))
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flags &= ~X86_EFLAGS_IF;
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return flags;
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}
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PV_CALLEE_SAVE_REGS_THUNK(vsmp_save_fl);
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__visible void vsmp_restore_fl(unsigned long flags)
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{
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if (flags & X86_EFLAGS_IF)
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flags &= ~X86_EFLAGS_AC;
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else
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flags |= X86_EFLAGS_AC;
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native_restore_fl(flags);
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}
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PV_CALLEE_SAVE_REGS_THUNK(vsmp_restore_fl);
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asmlinkage __visible void vsmp_irq_disable(void)
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{
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unsigned long flags = native_save_fl();
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native_restore_fl((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC);
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}
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PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_disable);
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asmlinkage __visible void vsmp_irq_enable(void)
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{
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unsigned long flags = native_save_fl();
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native_restore_fl((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
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}
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PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_enable);
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static unsigned __init vsmp_patch(u8 type, void *ibuf,
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unsigned long addr, unsigned len)
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{
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switch (type) {
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case PARAVIRT_PATCH(irq.irq_enable):
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case PARAVIRT_PATCH(irq.irq_disable):
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case PARAVIRT_PATCH(irq.save_fl):
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case PARAVIRT_PATCH(irq.restore_fl):
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return paravirt_patch_default(type, ibuf, addr, len);
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default:
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return native_patch(type, ibuf, addr, len);
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}
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}
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static void __init set_vsmp_pv_ops(void)
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#ifdef CONFIG_PCI
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static void __init set_vsmp_ctl(void)
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{
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void __iomem *address;
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unsigned int cap, ctl, cfg;
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@ -109,28 +52,12 @@ static void __init set_vsmp_pv_ops(void)
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}
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#endif
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if (cap & ctl & (1 << 4)) {
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/* Setup irq ops and turn on vSMP IRQ fastpath handling */
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pv_ops.irq.irq_disable = PV_CALLEE_SAVE(vsmp_irq_disable);
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pv_ops.irq.irq_enable = PV_CALLEE_SAVE(vsmp_irq_enable);
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pv_ops.irq.save_fl = PV_CALLEE_SAVE(vsmp_save_fl);
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pv_ops.irq.restore_fl = PV_CALLEE_SAVE(vsmp_restore_fl);
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pv_ops.init.patch = vsmp_patch;
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ctl &= ~(1 << 4);
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}
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writel(ctl, address + 4);
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ctl = readl(address + 4);
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pr_info("vSMP CTL: control set to:0x%08x\n", ctl);
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early_iounmap(address, 8);
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}
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#else
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static void __init set_vsmp_pv_ops(void)
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{
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}
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#endif
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#ifdef CONFIG_PCI
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static int is_vsmp = -1;
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static void __init detect_vsmp_box(void)
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@ -164,11 +91,14 @@ static int is_vsmp_box(void)
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{
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return 0;
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}
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static void __init set_vsmp_ctl(void)
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{
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}
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#endif
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static void __init vsmp_cap_cpus(void)
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{
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#if !defined(CONFIG_X86_VSMP) && defined(CONFIG_SMP)
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#if !defined(CONFIG_X86_VSMP) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
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void __iomem *address;
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unsigned int cfg, topology, node_shift, maxcpus;
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@ -221,6 +151,6 @@ void __init vsmp_init(void)
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vsmp_cap_cpus();
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set_vsmp_pv_ops();
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set_vsmp_ctl();
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return;
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}
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