talos-skiboot/core/exceptions.c, branch master

core/exception: beautify exception handler, add MCE-involved registers

2018-02-09T00:21:42+00:00

Print DSISR and DAR, to help with deciphering machine check exceptions, and improve the output a bit, decode NIP symbol, improve alignment, etc. Also print a specific header for machine check, because we do expect to see these if there is a hardware failure. Before: [ 0.005968779,3] *********************************************** [ 0.005974102,3] Unexpected exception 200 ! [ 0.005978696,3] SRR0 : 000000003002ad80 SRR1 : 9000000000001000 [ 0.005985239,3] HSRR0: 00000000300027b4 HSRR1: 9000000030001000 [ 0.005991782,3] LR : 000000003002ad80 CTR : 0000000000000000 [ 0.005998130,3] CFAR : 00000000300b58bc [ 0.006002769,3] CR : 40000004 XER: 20000000 [ 0.006008069,3] GPR00: 000000003002ad80 GPR16: 0000000000000000 [ 0.006015170,3] GPR01: 0000000031c03bd0 GPR17: 0000000000000000 [...] After: [ 0.003287941,3] *********************************************** [ 0.003561769,3] Fatal MCE at 000000003002ad80 .nvram_init+0x24 [ 0.003579628,3] CFAR : 00000000300b5964 [ 0.003584268,3] SRR0 : 000000003002ad80 SRR1 : 9000000000001000 [ 0.003590812,3] HSRR0: 00000000300027b4 HSRR1: 9000000030001000 [ 0.003597355,3] DSISR: 00000000 DAR : 0000000000000000 [ 0.003603480,3] LR : 000000003002ad68 CTR : 0000000030093d80 [ 0.003609930,3] CR : 40000004 XER : 20000000 [ 0.003615698,3] GPR00: 00000000300149e8 GPR16: 0000000000000000 [ 0.003622799,3] GPR01: 0000000031c03bc0 GPR17: 0000000000000000 [...] Signed-off-by: Nicholas Piggin Signed-off-by: Stewart Smith

Move FSP specific abort() code to platform layer

2015-09-09T05:43:50+00:00

Presently abort() call sets up HID0, triggers attention and finally calls infinite for loop. FSP takes care of collecting required logs and reboots the system. This sequence is specific to FSP machine and it will not work on BMC based machine. Hence move FSP specific code to hw/fsp/fsp-attn.c. Note that this patch adds new parameter to abort call. Hence replaced _abort() by abort() in exception.c so that we can capture file info as well. Signed-off-by: Vasant Hegde Signed-off-by: Stewart Smith

fix dump_regs() for hssr0 and hsrr1

2015-08-11T06:58:42+00:00

Signed-off-by: Stewart Smith

Remove redundant includes of opal-api.h

2015-04-01T01:16:39+00:00

Now that opal.h includes opal-api.h, there are a bunch of files that include both but don't need to. Signed-off-by: Michael Ellerman Signed-off-by: Stewart Smith

exceptions: Catch exceptions at boot time

2015-03-31T04:42:37+00:00

And print some informations about GPR state, backtrace, etc... Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Stewart Smith

exceptions: Remove deprecated exception patching stuff

2015-03-31T04:42:37+00:00

Linux no longer calls it, it never worked on LE and generally speaking never really did anything useful anyway. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Stewart Smith

sparse: hmi_lock can be static

2015-02-26T07:19:40+00:00

Signed-off-by: Cédric Le Goater Signed-off-by: Stewart Smith

Move skiboot internal things from opal.h to opal-api.h

2015-02-06T02:11:25+00:00

This is probably not the best collection of things in the world, but it means that opal.h is much closer to being directly usable by an OS. This triggers a bunch of #include fixes throughout the tree. Signed-off-by: Stewart Smith

opal: Remove MCE handling code.

2014-11-21T21:27:19+00:00

Removed following: - Machine check handle and other related routines. - per-cpu MCE event used to record machine check data cpu_thread->mc_event; - Machine check related definition including mce event structure from include/opal.h - A comment above GET_STACK() #define that warns about runtime modification made to GET_STACK macro by MC patching code. Signed-off-by: Mahesh Salgaonkar Signed-off-by: Benjamin Herrenschmidt

opal: Remove machine check interrupt patching in OPAL.

2014-11-21T21:26:35+00:00

Now that we catch/handle machine check interrupt directly in Linux host PowerNV kernel, we are not anymore dependent on OPAL firmware to do MCE handling job for us. The MCE handling code in OPAL has exclusive stack space (4k size) reserved and remains unused with Linux host not being dependent on it anymore. Hence, this patch removes the code that allows machine check interrupt patching in OPAL and reclaims back 4k of stack space for use of normal stack. For older kernel the patching request will result into an error. The subsequent patch will remove the rest of MCE handling code from OPAL. Signed-off-by: Mahesh Salgaonkar Signed-off-by: Benjamin Herrenschmidt