haraldwolff/qemu-patch-raspberry4
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acpi nvdimm: fix wrong buffer size returned by DSM method

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Currently, 'RLEN' is the totally buffer size written by QEMU and it is
ACPI internally used only. The buffer size returned to guest should
not include 'RLEN' itself

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xiao Guangrong 2016-10-29 00:11:49 +08:00 committed by Michael S. Tsirkin
parent 6034011c7e
commit d51d1d7ede
1 changed files with 2 additions and 1 deletions
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3
hw/acpi/nvdimm.c
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@ -862,7 +862,8 @@ static void nvdimm_build_common_dsm(Aml *dev)
aml_append(method, aml_store(dsm_mem, aml_name("NTFI")));
result_size = aml_local(1);
aml_append(method, aml_store(aml_name("RLEN"), result_size));
/* RLEN is not included in the payload returned to guest. */
aml_append(method, aml_subtract(aml_name("RLEN"), aml_int(4), result_size));
aml_append(method, aml_store(aml_shiftleft(result_size, aml_int(3)),
result_size));
aml_append(method, aml_create_field(aml_name("ODAT"), aml_int(0),