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author | Laszlo Ersek <lersek@redhat.com> | 2017-11-08 20:32:30 +0100 |
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committer | Laszlo Ersek <lersek@redhat.com> | 2017-11-17 18:12:15 +0100 |
commit | 2278b8a82ea945e9e93b0695b78896ba8db414d9 (patch) | |
tree | e215c794747919fdf23a1d8857d79c610c3ec53d /OvmfPkg/OvmfPkgIa32X64.fdf | |
parent | 9d9350a579d3f3d52ea1012111fad300c4e19fa2 (diff) | |
download | edk2-2278b8a82ea945e9e93b0695b78896ba8db414d9.tar.gz edk2-2278b8a82ea945e9e93b0695b78896ba8db414d9.tar.bz2 edk2-2278b8a82ea945e9e93b0695b78896ba8db414d9.zip |
OvmfPkg/Sec/X64: seed the temporary RAM with PcdInitValueInTempStack
This allows the PEI core to report the maximum temporary SEC/PEI stack
usage on the DEBUG_INFO level, in the PeiCheckAndSwitchStack() function
[MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c]:
* Normal boot:
> Temp Stack : BaseAddress=0x814000 Length=0x4000
> Temp Heap : BaseAddress=0x810000 Length=0x4000
> Total temporary memory: 32768 bytes.
> temporary memory stack ever used: 5080 bytes. <----
> temporary memory heap used for HobList: 8080 bytes.
> temporary memory heap occupied by memory pages: 0 bytes.
* S3 resume (no SMM / PEI decompression)
> Temp Stack : BaseAddress=0x814000 Length=0x4000
> Temp Heap : BaseAddress=0x810000 Length=0x4000
> Total temporary memory: 32768 bytes.
> temporary memory stack ever used: 5048 bytes. <----
> temporary memory heap used for HobList: 7112 bytes.
> temporary memory heap occupied by memory pages: 0 bytes.
I unit-tested this change by transitorily adding an infinite loop right
after the "rep stosq", and dumping the guest's temp SEC/PEI RAM (32KB
currently) while the guest was stuck in the loop. The dump includes one
dword from before and after the temp SEC/PEI RAM:
> $ virsh qemu-monitor-command GUEST_NAME --hmp 'xp /8194wx 0x80FFFC'
>
> 000000000080fffc: 0x00000000 0x5aa55aa5 0x5aa55aa5 0x5aa55aa5
> 000000000081000c: 0x5aa55aa5 0x5aa55aa5 0x5aa55aa5 0x5aa55aa5
> ...
> 0000000000817fec: 0x5aa55aa5 0x5aa55aa5 0x5aa55aa5 0x5aa55aa5
> 0000000000817ffc: 0x5aa55aa5 0x00000000
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=747
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'OvmfPkg/OvmfPkgIa32X64.fdf')
0 files changed, 0 insertions, 0 deletions