From: Hari Bathini <hbathini@linux.ibm.com> To: Michael Ellerman <mpe@ellerman.id.au>, linuxppc-dev <linuxppc-dev@ozlabs.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.ibm.com>, Mahesh J Salgaonkar <mahesh@linux.ibm.com>, Nicholas Piggin <npiggin@gmail.com>, Oliver <oohall@gmail.com>, Vasant Hegde <hegdevasant@linux.ibm.com>, Daniel Axtens <dja@axtens.net> Subject: Re: [PATCH v5 11/31] powernv/fadump: add fadump support on powernv Date: Tue, 3 Sep 2019 22:01:18 +0530 Message-ID: <69b1eba6-9ca6-864c-7148-4693e4578339@linux.ibm.com> (raw) In-Reply-To: <87sgpdr5y6.fsf@mpe.ellerman.id.au> On 03/09/19 4:40 PM, Michael Ellerman wrote: > Hari Bathini <hbathini@linux.ibm.com> writes: >> Add basic callback functions for FADump on PowerNV platform. > > I assume this doesn't actually work yet? > > Does something block it from appearing to work at runtime? With this patch, "fadump=on" would reserve memory for FADump as support is enabled but registration with f/w is not yet added. So, it would fail to register... > >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index d8dcd88..fc4ecfe 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -566,7 +566,7 @@ config CRASH_DUMP >> >> config FA_DUMP >> bool "Firmware-assisted dump" >> - depends on PPC64 && PPC_RTAS >> + depends on PPC64 && (PPC_RTAS || PPC_POWERNV) >> select CRASH_CORE >> select CRASH_DUMP >> help >> @@ -577,7 +577,8 @@ config FA_DUMP >> is meant to be a kdump replacement offering robustness and >> speed not possible without system firmware assistance. >> >> - If unsure, say "N" >> + If unsure, say "y". Only special kernels like petitboot may >> + need to say "N" here. >> >> config IRQ_ALL_CPUS >> bool "Distribute interrupts on all CPUs by default" >> diff --git a/arch/powerpc/kernel/fadump-common.h b/arch/powerpc/kernel/fadump-common.h >> index d2c5b16..f6c52d3 100644 >> --- a/arch/powerpc/kernel/fadump-common.h >> +++ b/arch/powerpc/kernel/fadump-common.h >> @@ -140,4 +140,13 @@ static inline int rtas_fadump_dt_scan(struct fw_dump *fadump_config, ulong node) >> } >> #endif >> >> +#ifdef CONFIG_PPC_POWERNV >> +extern int opal_fadump_dt_scan(struct fw_dump *fadump_config, ulong node); >> +#else >> +static inline int opal_fadump_dt_scan(struct fw_dump *fadump_config, ulong node) >> +{ >> + return 1; >> +} > > Extending the strange flat device tree calling convention to these > functions is not ideal. > > It would be better I think if they just returned bool true/false for > "found it" / "not found", and then early_init_dt_scan_fw_dump() can > convert that into the appropriate return value. > >> diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c >> index f7c8073..b8061fb9 100644 >> --- a/arch/powerpc/kernel/fadump.c >> +++ b/arch/powerpc/kernel/fadump.c >> @@ -114,6 +114,9 @@ int __init early_init_dt_scan_fw_dump(unsigned long node, const char *uname, >> if (strcmp(uname, "rtas") == 0) >> return rtas_fadump_dt_scan(&fw_dump, node); >> >> + if (strcmp(uname, "ibm,opal") == 0) >> + return opal_fadump_dt_scan(&fw_dump, node); >> + > > ie this would become: > > if (strcmp(uname, "ibm,opal") == 0 && opal_fadump_dt_scan(&fw_dump, node)) > return 1; > Yeah. Will update accordingly... Thanks Hari
next prev parent reply index Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-20 12:04 [PATCH v5 00/31] Add FADump support on PowerNV platform Hari Bathini 2019-08-20 12:04 ` [PATCH v5 01/31] powerpc/fadump: move internal macros/definitions to a new header Hari Bathini 2019-09-03 11:09 ` Michael Ellerman 2019-09-03 16:05 ` Hari Bathini 2019-08-20 12:04 ` [PATCH v5 02/31] powerpc/fadump: move internal code to a new file Hari Bathini 2019-09-03 11:09 ` Michael Ellerman 2019-09-03 16:05 ` Hari Bathini 2019-09-04 9:02 ` Mahesh Jagannath Salgaonkar 2019-09-04 18:26 ` Hari Bathini 2019-08-20 12:04 ` [PATCH v5 03/31] powerpc/fadump: Improve fadump documentation Hari Bathini 2019-08-20 12:04 ` [PATCH v5 04/31] pseries/fadump: move rtas specific definitions to platform code Hari Bathini 2019-08-20 12:04 ` [PATCH v5 05/31] pseries/fadump: introduce callbacks for platform specific operations Hari Bathini 2019-09-03 11:10 ` Michael Ellerman 2019-09-03 16:06 ` Hari Bathini 2019-09-06 6:39 ` Hari Bathini 2019-08-20 12:04 ` [PATCH v5 06/31] pseries/fadump: define register/un-register callback functions Hari Bathini 2019-09-03 11:10 ` Michael Ellerman 2019-09-03 17:15 ` Hari Bathini 2019-08-20 12:04 ` [PATCH v5 07/31] powerpc/fadump: release all the memory above boot memory size Hari Bathini 2019-09-03 11:10 ` Michael Ellerman 2019-09-03 16:27 ` Hari Bathini 2019-08-20 12:05 ` [PATCH v5 08/31] pseries/fadump: move out platform specific support from generic code Hari Bathini 2019-08-20 12:05 ` [PATCH v5 09/31] powerpc/fadump: use FADump instead of fadump for how it is pronounced Hari Bathini 2019-08-20 12:05 ` [PATCH v5 10/31] opal: add MPIPL interface definitions Hari Bathini 2019-09-03 11:10 ` Michael Ellerman 2019-09-03 16:28 ` Hari Bathini 2019-09-04 11:03 ` Michael Ellerman 2019-09-04 11:05 ` Michael Ellerman 2019-08-20 12:05 ` [PATCH v5 11/31] powernv/fadump: add fadump support on powernv Hari Bathini 2019-09-03 11:10 ` Michael Ellerman 2019-09-03 16:31 ` Hari Bathini [this message] 2019-09-04 14:33 ` Hari Bathini 2019-09-05 3:11 ` Michael Ellerman 2019-08-20 12:05 ` [PATCH v5 12/31] powernv/fadump: register kernel metadata address with opal Hari Bathini 2019-09-04 11:25 ` Michael Ellerman 2019-08-20 12:05 ` [PATCH v5 13/31] powernv/fadump: reset metadata address during clean up Hari Bathini 2019-08-27 12:00 ` Hari Bathini 2019-08-20 12:05 ` [PATCH v5 14/31] powernv/fadump: define register/un-register callback functions Hari Bathini 2019-09-05 4:15 ` Michael Ellerman 2019-09-05 7:23 ` Michael Ellerman 2019-09-05 9:54 ` Hari Bathini 2019-08-20 12:05 ` [PATCH v5 15/31] powernv/fadump: support copying multiple kernel boot memory regions Hari Bathini 2019-09-04 11:30 ` Michael Ellerman 2019-09-04 20:20 ` Hari Bathini 2019-09-05 3:13 ` Michael Ellerman 2019-08-20 12:06 ` [PATCH v5 16/31] powernv/fadump: process the crashdump by exporting it as /proc/vmcore Hari Bathini 2019-09-04 11:42 ` Michael Ellerman 2019-09-04 21:01 ` Hari Bathini 2019-08-20 12:06 ` [PATCH v5 17/31] powernv/fadump: Warn before processing partial crashdump Hari Bathini 2019-09-04 11:48 ` Michael Ellerman 2019-08-20 12:06 ` [PATCH v5 18/31] powernv/fadump: handle invalidation of crashdump and re-registraion Hari Bathini 2019-08-20 12:06 ` [PATCH v5 19/31] powerpc/fadump: Update documentation about OPAL platform support Hari Bathini 2019-09-04 11:51 ` Michael Ellerman 2019-09-04 12:08 ` Oliver O'Halloran 2019-09-05 3:15 ` Michael Ellerman 2019-08-20 12:06 ` [PATCH v5 20/31] powerpc/fadump: use smaller offset while finding memory for reservation Hari Bathini 2019-09-04 11:54 ` Michael Ellerman 2019-08-20 12:06 ` [PATCH v5 21/31] powernv/fadump: process architected register state data provided by firmware Hari Bathini 2019-09-04 12:20 ` Michael Ellerman 2019-09-09 13:23 ` Hari Bathini 2019-09-09 15:33 ` Oliver O'Halloran 2019-09-10 8:48 ` Hari Bathini 2019-09-10 14:05 ` Michael Ellerman 2019-09-10 16:10 ` Hari Bathini 2019-08-20 12:06 ` [PATCH v5 22/31] powerpc/fadump: make crash memory ranges array allocation generic Hari Bathini 2019-08-20 12:06 ` [PATCH v5 23/31] powerpc/fadump: consider reserved ranges while releasing memory Hari Bathini 2019-08-20 12:07 ` [PATCH v5 24/31] powerpc/fadump: improve how crashed kernel's memory is reserved Hari Bathini 2019-08-20 12:07 ` [PATCH v5 25/31] powernv/fadump: add support to preserve crash data on FADUMP disabled kernel Hari Bathini 2019-08-20 12:07 ` [PATCH v5 26/31] powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMP Hari Bathini 2019-08-20 12:07 ` [PATCH v5 27/31] powernv/opalcore: export /sys/firmware/opal/core for analysing opal crashes Hari Bathini 2019-08-20 12:07 ` [PATCH v5 28/31] powernv/opalcore: provide an option to invalidate /sys/firmware/opal/core file Hari Bathini 2019-08-20 12:07 ` [PATCH v5 29/31] powerpc/fadump: consider f/w load area Hari Bathini 2019-08-20 12:07 ` [PATCH v5 30/31] powernv/fadump: update documentation about option to release opalcore Hari Bathini 2019-08-20 12:07 ` [PATCH v5 31/31] powernv/fadump: support holes in kernel boot memory area Hari Bathini
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