From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Subject: Re: [PATCH V12 07/10] efi: print unrecognized CPER section Date: Mon, 06 Mar 2017 13:05:00 -0800 Message-ID: <1488834300.2210.19.camel@perches.com> References: <1488833103-21082-1-git-send-email-tbaicar@codeaurora.org> <1488833103-21082-8-git-send-email-tbaicar@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1488833103-21082-8-git-send-email-tbaicar@codeaurora.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Tyler Baicar , christoffer.dall@linaro.org, marc.zyngier@arm.com, pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, rjw@rjwysocki.net, lenb@kernel.org, matt@codeblueprint.co.uk, robert.moore@intel.com, lv.zheng@intel.com, nkaje@codeaurora.org, zjzhang@codeaurora.org, mark.rutland@arm.com, james.morse@arm.com, akpm@linux-foundation.org, eun.taik.lee@samsung.com, sandeepa.s.prabhu@gmail.com, labbott@redhat.com, shijie.huang@arm.com, rruigrok@codeaurora.org, paul.gortmaker@windriver.com, tn@semihalf.com, fu.wei@linaro.org, rostedt@goodmis.org, bristot@redhat.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-efi@vger.kernel.org, devel@acpica.org, Suzuki.Poulose@arm.com, puni List-Id: linux-efi@vger.kernel.org On Mon, 2017-03-06 at 13:45 -0700, Tyler Baicar wrote: > UEFI spec allows for non-standard section in Common Platform Error > Record. This is defined in section N.2.3 of UEFI version 2.5. > > Currently if the CPER section's type (UUID) does not match with > one of the section types that the kernel knows how to parse, the > section is skipped. Therefore, user is not able to see > such CPER data, for instance, error record of non-standard section. > > For above mentioned case, this change prints out the raw data in > hex in dmesg buffer. Data length is taken from Error Data length > field of Generic Error Data Entry. Hi Tyler. Trivia: (probably not worth resubmitting for this) There's a slight mismatch between logging output and commit message. Now there's an ASCII block after the output. Another suggestion below. > Following is a sample output from dmesg: > [ 115.771702] {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 2 > [ 115.779042] {1}[Hardware Error]: It has been corrected by h/w and requires no further action > [ 115.787456] {1}[Hardware Error]: event severity: corrected > [ 115.792927] {1}[Hardware Error]: Error 0, type: corrected > [ 115.798415] {1}[Hardware Error]: fru_id: 00000000-0000-0000-0000-000000000000 > [ 115.805596] {1}[Hardware Error]: fru_text: > [ 115.816105] {1}[Hardware Error]: section type: d2e2621c-f936-468d-0d84-15a4ed015c8b > [ 115.823880] {1}[Hardware Error]: section length: 88 > [ 115.828779] {1}[Hardware Error]: 00000000: 01000001 00000002 5f434345 525f4543 > [ 115.836153] {1}[Hardware Error]: 00000010: 0000574d 00000000 00000000 00000000 > [ 115.843531] {1}[Hardware Error]: 00000020: 00000000 00000000 00000000 00000000 > [ 115.850908] {1}[Hardware Error]: 00000030: 00000000 00000000 00000000 00000000 > [ 115.858288] {1}[Hardware Error]: 00000040: fe800000 00000000 00000004 5f434345 > [ 115.865665] {1}[Hardware Error]: 00000050: 525f4543 0000574d [] > diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c [] > @@ -591,8 +591,16 @@ static void cper_estatus_print_section( > cper_print_proc_arm(newpfx, arm_err); > else > goto err_section_too_small; > - } else > - printk("%s""section type: unknown, %pUl\n", newpfx, sec_type); > + } else { > + const void *unknown_err; > + > + unknown_err = acpi_hest_generic_data_payload(gdata); > + printk("%ssection type: unknown, %pUl\n", newpfx, sec_type); > + printk("%ssection length: %d\n", newpfx, > + gdata->error_data_length); It might be nice to output this as printk("%ssection length: %d (%#x)\n", newpfx, gdata->error_data_length, gdata->error_data_length); so it's easy to know the appropriate hex buffer length too. > + print_hex_dump(newpfx, "", DUMP_PREFIX_OFFSET, 16, 4, > + unknown_err, gdata->error_data_length, true); > + } > > return; >