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| author | Tomasz Wroblewski <tomasz.wroblewski@citrix.com> | 2013-01-23 10:31:04 +0100 |
|---|---|---|
| committer | Tomasz Wroblewski <tomasz.wroblewski@citrix.com> | 2013-01-23 10:31:04 +0100 |
| commit | 529d5731e40e179e396397c633e10316a850044e (patch) | |
| tree | 11e8507629429669ee00f8f4e93af056dfc15c50 /xen/include/acpi | |
| parent | 00b70689c193b9cccb1fac3c3764bed77e152c4e (diff) | |
| download | xen-529d5731e40e179e396397c633e10316a850044e.tar.gz xen-529d5731e40e179e396397c633e10316a850044e.tar.bz2 xen-529d5731e40e179e396397c633e10316a850044e.zip | |
fix acpi_dmar_zap/reinstate() (fixes S3 regression)
Fix S3 regression introduced by cs 23013:65d26504e843 (ACPI: large
cleanup). The dmar virtual pointer returned from acpi_get_table cannot
be safely stored away and used later, as the underlying
acpi_os_map_memory / __acpi_map_table functions overwrite the mapping
causing it to point to different tables than dmar (last fetched table is
used). This subsequently causes acpi_dmar_reinstate() and
acpi_dmar_zap() to write data to wrong table, causing its corruption and
problems with consecutive s3 resumes.
Added a new function to fetch ACPI table physical address, and
establishing separate static mapping for dmar_table pointer instead of
using acpi_get_table().
Signed-off-by: Tomasz Wroblewski <tomasz.wroblewski@citrix.com>
Added call to acpi_tb_verify_table(). Fixed page count passed to
map_pages_to_xen(). Cosmetic changes.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Committed-by: Jan Beulich <jbeulich@suse.com>
Diffstat (limited to 'xen/include/acpi')
| -rw-r--r-- | xen/include/acpi/acpixf.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/include/acpi/acpixf.h b/xen/include/acpi/acpixf.h index cd2b4fbfc1..7ae1f07ca3 100644 --- a/xen/include/acpi/acpixf.h +++ b/xen/include/acpi/acpixf.h @@ -77,6 +77,9 @@ acpi_status acpi_get_table(acpi_string signature, acpi_native_uint instance, struct acpi_table_header **out_table); +acpi_status +acpi_get_table_phys(acpi_string signature, acpi_native_uint instance, + acpi_physical_address *addr, acpi_native_uint *len); /* * Namespace and name interfaces */ |