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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-25 12:32:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-25 12:32:10 -0700 |
| commit | 4b7227ca321ccf447cdc04538687c895db8b77f5 (patch) | |
| tree | 72712127fc56aa2579e8a1508998bcabf6bd6c60 /arch/x86/xen/setup.c | |
| parent | 5dae61b80564a5583ff4b56e357bdbc733fddb76 (diff) | |
| parent | 1775826ceec51187aa868406585799b7e76ffa7d (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-xen-next
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-xen-next: (52 commits)
xen: add balloon driver
xen: allow compilation with non-flat memory
xen: fold xen_sysexit into xen_iret
xen: allow set_pte_at on init_mm to be lockless
xen: disable preemption during tlb flush
xen pvfb: Para-virtual framebuffer, keyboard and pointer driver
xen: Add compatibility aliases for frontend drivers
xen: Module autoprobing support for frontend drivers
xen blkfront: Delay wait for block devices until after the disk is added
xen/blkfront: use bdget_disk
xen: Make xen-blkfront write its protocol ABI to xenstore
xen: import arch generic part of xencomm
xen: make grant table arch portable
xen: replace callers of alloc_vm_area()/free_vm_area() with xen_ prefixed one
xen: make include/xen/page.h portable moving those definitions under asm dir
xen: add resend_irq_on_evtchn() definition into events.c
Xen: make events.c portable for ia64/xen support
xen: move events.c to drivers/xen for IA64/Xen support
xen: move features.c from arch/x86/xen/features.c to drivers/xen
xen: add missing definitions in include/xen/interface/vcpu.h which ia64/xen needs
...
Diffstat (limited to 'arch/x86/xen/setup.c')
| -rw-r--r-- | arch/x86/xen/setup.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 2341492bf7a..82517e4a752 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -16,6 +16,7 @@ #include <asm/xen/hypervisor.h> #include <asm/xen/hypercall.h> +#include <xen/interface/callback.h> #include <xen/interface/physdev.h> #include <xen/features.h> @@ -68,6 +69,24 @@ static void __init fiddle_vdso(void) *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT; } +void xen_enable_sysenter(void) +{ + int cpu = smp_processor_id(); + extern void xen_sysenter_target(void); + /* Mask events on entry, even though they get enabled immediately */ + static struct callback_register sysenter = { + .type = CALLBACKTYPE_sysenter, + .address = { __KERNEL_CS, (unsigned long)xen_sysenter_target }, + .flags = CALLBACKF_mask_events, + }; + + if (!boot_cpu_has(X86_FEATURE_SEP) || + HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) != 0) { + clear_cpu_cap(&cpu_data(cpu), X86_FEATURE_SEP); + clear_cpu_cap(&boot_cpu_data, X86_FEATURE_SEP); + } +} + void __init xen_arch_setup(void) { struct physdev_set_iopl set_iopl; @@ -82,6 +101,8 @@ void __init xen_arch_setup(void) HYPERVISOR_set_callbacks(__KERNEL_CS, (unsigned long)xen_hypervisor_callback, __KERNEL_CS, (unsigned long)xen_failsafe_callback); + xen_enable_sysenter(); + set_iopl.iopl = 1; rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl); if (rc != 0) |