Commit 9f6d8552 authored by Ravikiran G Thirumalai's avatar Ravikiran G Thirumalai Committed by Ingo Molnar

x86: vSMP: use pvops only if platform has the capability to support it

Re-arrange set_vsmp_pv_ops so that pv_ops are set only if
the platform has capability to support paravirtualized irq ops
Signed-off-by: default avatarRavikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent aa7d8e25
......@@ -78,12 +78,6 @@ static void __init set_vsmp_pv_ops(void)
void *address;
unsigned int cap, ctl, cfg;
pv_irq_ops.irq_disable = vsmp_irq_disable;
pv_irq_ops.irq_enable = vsmp_irq_enable;
pv_irq_ops.save_fl = vsmp_save_fl;
pv_irq_ops.restore_fl = vsmp_restore_fl;
pv_init_ops.patch = vsmp_patch;
/* set vSMP magic bits to indicate vSMP capable kernel */
cfg = read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0);
address = early_ioremap(cfg, 8);
......@@ -92,7 +86,13 @@ static void __init set_vsmp_pv_ops(void)
printk(KERN_INFO "vSMP CTL: capabilities:0x%08x control:0x%08x\n",
cap, ctl);
if (cap & ctl & (1 << 4)) {
/* Turn on vSMP IRQ fastpath handling (see system.h) */
/* Setup irq ops and turn on vSMP IRQ fastpath handling */
pv_irq_ops.irq_disable = vsmp_irq_disable;
pv_irq_ops.irq_enable = vsmp_irq_enable;
pv_irq_ops.save_fl = vsmp_save_fl;
pv_irq_ops.restore_fl = vsmp_restore_fl;
pv_init_ops.patch = vsmp_patch;
ctl &= ~(1 << 4);
writel(ctl, address + 4);
ctl = readl(address + 4);
......
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