Messages in this thread | | | Subject | Re: [PATCH v2 2/3] vTPM: reformat event log to be byte-aligned | From | Ashley Lai <> | Date | Wed, 14 Oct 2015 16:15:07 -0500 |
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On 10/13/2015 04:27 PM, Hon Ching(Vicky) Lo wrote: > On Tue, 2015-10-13 at 13:43 -0500, Ashley Lai wrote: >> On 10/07/2015 07:11 PM, Hon Ching(Vicky) Lo wrote: >>> The event log generated by OpenFirmware in PowerPC is 4-byte aligned. >>> This patch reformats the log to be byte-aligned for the Linux client. >>> >>> Signed-off-by: Hon Ching(Vicky) Lo <honclo@linux.vnet.ibm.com> >>> --- >>> arch/powerpc/kernel/prom_init.c | 13 ++++++++++++- >>> 1 files changed, 12 insertions(+), 1 deletions(-) >>> >>> diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c >>> index b9b6bb1..8a5c248 100644 >>> --- a/arch/powerpc/kernel/prom_init.c >>> +++ b/arch/powerpc/kernel/prom_init.c >>> @@ -1417,8 +1417,9 @@ static void __init prom_instantiate_sml(void) >>> { >>> phandle ibmvtpm_node; >>> ihandle ibmvtpm_inst; >>> - u32 entry = 0, size = 0; >>> + u32 entry = 0, size = 0, succ = 0; >>> u64 base; >>> + __be32 val; >>> >>> prom_debug("prom_instantiate_sml: start...\n"); >>> >>> @@ -1433,6 +1434,16 @@ static void __init prom_instantiate_sml(void) >>> return; >>> } >>> >>> + if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported", >>> + &val, sizeof(val)) != PROM_ERROR) { >>> + if (call_prom_ret("call-method", 2, 2, &succ, >>> + ADDR("reformat-sml-to-efi-alignment"), >>> + ibmvtpm_inst) != 0 || succ == 0) { >> reformat-sml-to-efi-alignment is something new just added in the firmware? I don't remember seeing it before. > Yes, it's new. Our new firmware version will support it. Looks like this will break the backward compatibility with the new kernel running on the older firmware.
> >> >>> >
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