> -----Original Message----- > From: Borislav Petkov [mailto:bp@xxxxxxx] > Sent: Tuesday, February 27, 2018 10:04 AM > To: Ghannam, Yazen <Yazen.Ghannam@xxxxxxx> > Cc: linux-efi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > ard.biesheuvel@xxxxxxxxxx; x86@xxxxxxxxxx > Subject: Re: [PATCH v2 5/8] efi: Decode IA32/X64 Cache, TLB, and Bus Check > structures > > On Mon, Feb 26, 2018 at 01:39:01PM -0600, Yazen Ghannam wrote: > > +static void print_err_info(const char *pfx, u8 err_type, u64 check) > > +{ > > + u16 validation_bits = CHECK_VALID_BITS(check); > > + > > + printk("%sValidation Bits: 0x%04x\n", pfx, validation_bits); > > + > > + if (err_type == ERR_TYPE_MS) > > + return; > > + > > + if (validation_bits & CHECK_VALID_TRANS_TYPE) { > > + u8 trans_type = CHECK_TRANS_TYPE(check); > > + > > + printk("%sTransaction Type: %u, %s\n", pfx, trans_type, > > + trans_type < ARRAY_SIZE(ia_check_trans_type_strs) ? > > + ia_check_trans_type_strs[trans_type] : "unknown"); > > + } > > + > > + if (validation_bits & CHECK_VALID_OPERATION) { > > + u8 op = CHECK_OPERATION(check); > > + > > + /* > > + * CACHE has more operation types than TLB or BUS, though > the > > + * name and the order are the same. > > + */ > > + u8 max_ops = (err_type == ERR_TYPE_CACHE) ? 9 : 7; > > + > > + printk("%sOperation: %u, %s\n", pfx, op, > > + op < max_ops ? ia_check_op_strs[op] : "unknown"); > > + } > > + > > + if (validation_bits & CHECK_VALID_LEVEL) > > + printk("%sLevel: %llu\n", pfx, CHECK_LEVEL(check)); > > + > > + if (validation_bits & CHECK_VALID_PCC) > > + print_bool("Processor Context Corrupt", pfx, check, > CHECK_PCC); > > I think we want to print PCC here unconditionally and say: > > PCC: (yes|no|invalid) > > I don't think the absence of PCC in the error record is a good enough > hint that the PCC field is invalid. > > Ditto for the rest and transaction type above too. I think it would be > much easier if we have fixed fields error record. > I agree which is why I've included the Validation Bits. A user can then check the Validation Bits for any field that is of interest but missing. Thanks, Yazen ��.n��������+%������w��{.n�����{����* jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
