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| author | Jeremy Fitzhardinge <jeremy@xensource.com> | 2007-07-18 05:37:07 +0400 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-07-18 19:47:45 +0400 |
| commit | 60223a326fc8fa6e90e2c3fd28ae6de4a311d731 (patch) | |
| tree | cf4e667a56402b846488373bfaf5bf840395e219 /include | |
| parent | 3e2b8fbeec8f005672f2a2e862fb9c26a0bafedc (diff) | |
| download | linux-60223a326fc8fa6e90e2c3fd28ae6de4a311d731.tar.xz | |
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 'include')
| -rw-r--r-- | include/xen/interface/vcpu.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/xen/interface/vcpu.h b/include/xen/interface/vcpu.h index c6218f1ad3ca..ff61ea365997 100644 --- a/include/xen/interface/vcpu.h +++ b/include/xen/interface/vcpu.h @@ -151,4 +151,17 @@ struct vcpu_set_singleshot_timer { #define _VCPU_SSHOTTMR_future (0) #define VCPU_SSHOTTMR_future (1U << _VCPU_SSHOTTMR_future) +/* + * Register a memory location in the guest address space for the + * vcpu_info structure. This allows the guest to place the vcpu_info + * structure in a convenient place, such as in a per-cpu data area. + * The pointer need not be page aligned, but the structure must not + * cross a page boundary. + */ +#define VCPUOP_register_vcpu_info 10 /* arg == struct vcpu_info */ +struct vcpu_register_vcpu_info { + uint32_t mfn; /* mfn of page to place vcpu_info */ + uint32_t offset; /* offset within page */ +}; + #endif /* __XEN_PUBLIC_VCPU_H__ */ |