diff options
| author | Wei Huang <wei@redhat.com> | 2016-09-06 19:52:17 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-09-06 19:52:17 +0100 |
| commit | f460be435f8750d5d1484d3d8b9e5b2c334f0e20 (patch) | |
| tree | 97e8f95a988e45658b62becbc6019d605a8c3cfb /hw/input | |
| parent | e0fe723c24562c8f909bb40f131bfdbe75650677 (diff) | |
ARM: ACPI: fix the AML ID format for CPU devices
Current QEMU will stall guest VM booting under ACPI mode when vcpu count
is >= 12. Analyzing the booting log, it turns out that DSDT table can't
be loaded correctly due to "Invalid character(s) in name (0x62303043),
repaired: [C00*]". This is because existing QEMU uses a lower case AML
ID for CPU devices (e.g. C000, C001, ..., C00a, C00b). The ACPI code
inside guest VM detects this lower case character as an invalid character
(see acpi_ut_valid_acpi_char() in drivers/acpi/acpica/utstring.c file)
and converts it to "*". This causes duplicated IDs (i.e. "C00a" ==>"C00*"
and "C00b" ==> "C00*"). So ACPI refuses to load the table.
This patch fixes the problem by changing the format with a upper case
character. It matches the CPU ID formats used in other parts of QEMU
code.
Reported-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Wei Huang <wei@redhat.com>
Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Message-id: 1472852809-23042-1-git-send-email-wei@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/input')
0 files changed, 0 insertions, 0 deletions