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| author | Jeremy Fitzhardinge <jeremy@xensource.com> | 2007-07-17 18:37:07 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-07-18 08:47:45 -0700 |
| commit | 60223a326fc8fa6e90e2c3fd28ae6de4a311d731 (patch) | |
| tree | cf4e667a56402b846488373bfaf5bf840395e219 /arch/i386/xen/smp.c | |
| parent | 3e2b8fbeec8f005672f2a2e862fb9c26a0bafedc (diff) | |
| download | lwn-60223a326fc8fa6e90e2c3fd28ae6de4a311d731.tar.gz lwn-60223a326fc8fa6e90e2c3fd28ae6de4a311d731.zip | |
xen: Place vcpu_info structure into per-cpu memory
An experimental patch for Xen allows guests to place their vcpu_info
structs anywhere. We try to use this to place the vcpu_info into the
PDA, which allows direct access.
If this works, then switch to using direct access operations for
irq_enable, disable, save_fl and restore_fl.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Keir Fraser <keir@xensource.com>
Diffstat (limited to 'arch/i386/xen/smp.c')
| -rw-r--r-- | arch/i386/xen/smp.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/i386/xen/smp.c b/arch/i386/xen/smp.c index a620918f87ee..557b8e24706a 100644 --- a/arch/i386/xen/smp.c +++ b/arch/i386/xen/smp.c @@ -142,8 +142,6 @@ void __init xen_smp_prepare_boot_cpu(void) BUG_ON(smp_processor_id() != 0); native_smp_prepare_boot_cpu(); - xen_vcpu_setup(0); - /* We've switched to the "real" per-cpu gdt, so make sure the old memory can be recycled */ make_lowmem_page_readwrite(&per_cpu__gdt_page); @@ -152,6 +150,8 @@ void __init xen_smp_prepare_boot_cpu(void) cpus_clear(cpu_sibling_map[cpu]); cpus_clear(cpu_core_map[cpu]); } + + xen_setup_vcpu_info_placement(); } void __init xen_smp_prepare_cpus(unsigned int max_cpus) @@ -262,7 +262,6 @@ int __cpuinit xen_cpu_up(unsigned int cpu) init_gdt(cpu); per_cpu(current_task, cpu) = idle; - xen_vcpu_setup(cpu); irq_ctx_init(cpu); xen_setup_timer(cpu); |