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Date: Wed, 14 Oct 2015 16:20:28 -0500 From: Ashley Lai <ashleydlai@...il.com> To: "Hon Ching(Vicky) Lo" <honclo@...ux.vnet.ibm.com> Cc: tpmdd-devel@...ts.sourceforge.net, Peter Huewe <PeterHuewe@....de>, Ashley Lai <ashley@...leylai.com>, Mimi Zohar <zohar@...ux.vnet.ibm.com>, Vicky Lo <honclo2014@...il.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2 2/3] vTPM: reformat event log to be byte-aligned On 10/14/2015 04:15 PM, Ashley Lai wrote: > > > 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@...ux.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. Never mind. I missed the check before that. Looks good to me. > >> >>> >>>> >> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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