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| author | Ross Lagerwall <ross.lagerwall@citrix.com> | 2017-10-23 10:27:27 +0100 |
|---|---|---|
| committer | Ian Jackson <Ian.Jackson@eu.citrix.com> | 2018-04-26 16:29:51 +0100 |
| commit | 2cbf8903530b936964dd3af7e2e5bf85c3955d5c (patch) | |
| tree | 014254d958e20b45bf94e90d683b25f8b5317e51 /include | |
| parent | 2c42f1e80103cb926c0703d4c1ac1fb9c3e2c600 (diff) | |
| download | qemu-2cbf8903530b936964dd3af7e2e5bf85c3955d5c.tar.gz | |
xen: Use newly added dmops for mapping VGA memory
Xen unstable (to be in 4.11) has two new dmops, relocate_memory and
pin_memory_cacheattr. Use these to set up the VGA memory, replacing the
previous calls to libxc. This allows the VGA console to work properly
when QEMU is running restricted (-xen-domid-restrict).
Wrapper functions are provided to allow QEMU to work with older versions
of Xen.
Tweak the error handling while making this change:
* Report pin_memory_cacheattr errors.
* Report errors even when DEBUG_HVM is not set. This is useful for
trying to understand why VGA is not working, since otherwise it just
fails silently.
* Fix the return values when an error occurs. The functions now
consistently return -1 and set errno.
CC: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/xen/xen_common.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h index 4bd30a386b..2eed6fcba3 100644 --- a/include/hw/xen/xen_common.h +++ b/include/hw/xen/xen_common.h @@ -89,6 +89,38 @@ typedef xc_interface xendevicemodel_handle; #endif +#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 41100 + +static inline int xendevicemodel_relocate_memory( + xendevicemodel_handle *dmod, domid_t domid, uint32_t size, uint64_t src_gfn, + uint64_t dst_gfn) +{ + uint32_t i; + int rc; + + for (i = 0; i < size; i++) { + unsigned long idx = src_gfn + i; + xen_pfn_t gpfn = dst_gfn + i; + + rc = xc_domain_add_to_physmap(xen_xc, domid, XENMAPSPACE_gmfn, idx, + gpfn); + if (rc) { + return rc; + } + } + + return 0; +} + +static inline int xendevicemodel_pin_memory_cacheattr( + xendevicemodel_handle *dmod, domid_t domid, uint64_t start, uint64_t end, + uint32_t type) +{ + return xc_domain_pin_memory_cacheattr(xen_xc, domid, start, end, type); +} + +#endif /* CONFIG_XEN_CTRL_INTERFACE_VERSION < 41100 */ + #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 41000 #define XEN_COMPAT_PHYSMAP |