From ae5da273fe3352febd38658d8d34484cbcfb3423 Mon Sep 17 00:00:00 2001 From: Zachary Amsden Date: Tue, 13 Feb 2007 13:26:21 +0100 Subject: [PATCH] i386: SMP boot hook for paravirt Add VMI SMP boot hook. We emulate a regular boot sequence and use the same APIC IPI initiation, we just poke magic values to load into the CPU state when the startup IPI is received, rather than having to jump through a real mode trampoline. This is all that was needed to get SMP to work. Signed-off-by: Zachary Amsden Signed-off-by: Andi Kleen Cc: Andi Kleen Cc: Jeremy Fitzhardinge Cc: Rusty Russell Cc: Chris Wright Signed-off-by: Andrew Morton --- arch/i386/kernel/paravirt.c | 2 ++ arch/i386/kernel/smpboot.c | 7 +++++++ 2 files changed, 9 insertions(+) (limited to 'arch/i386/kernel') diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c index 4dfdac4..5bf8105 100644 --- a/arch/i386/kernel/paravirt.c +++ b/arch/i386/kernel/paravirt.c @@ -572,6 +572,8 @@ struct paravirt_ops paravirt_ops = { .irq_enable_sysexit = native_irq_enable_sysexit, .iret = native_iret, + + .startup_ipi_hook = (void *)native_nop, }; /* diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c index 8c6c8c52..1908afa2 100644 --- a/arch/i386/kernel/smpboot.c +++ b/arch/i386/kernel/smpboot.c @@ -835,6 +835,13 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) num_starts = 0; /* + * Paravirt / VMI wants a startup IPI hook here to set up the + * target processor state. + */ + startup_ipi_hook(phys_apicid, (unsigned long) start_secondary, + (unsigned long) stack_start.esp); + + /* * Run STARTUP IPI loop. */ Dprintk("#startup loops: %d.\n", num_starts); -- cgit v1.1