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powerpc/pseries: add FW_FEATURE_WATCHDOG flag

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PAPR v2.12 specifies a new optional function set, "hcall-watchdog",
for the /rtas/ibm,hypertas-functions property.  The presence of this
function set indicates support for the H_WATCHDOG hypercall.

Check for this function set and, if present, set the new
FW_FEATURE_WATCHDOG flag.

Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220713202335.1217647-3-cheloha@linux.ibm.com
This commit is contained in:
Scott Cheloha 2022-07-13 15:23:33 -05:00 committed by Michael Ellerman
parent c6b2bd262b
commit 1621563ec6
2 changed files with 3 additions and 1 deletions
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3
arch/powerpc/include/asm/firmware.h
View File

@ -55,6 +55,7 @@
#define FW_FEATURE_RPT_INVALIDATE ASM_CONST(0x0000010000000000)
#define FW_FEATURE_FORM2_AFFINITY ASM_CONST(0x0000020000000000)
#define FW_FEATURE_ENERGY_SCALE_INFO ASM_CONST(0x0000040000000000)
#define FW_FEATURE_WATCHDOG ASM_CONST(0x0000080000000000)
#ifndef __ASSEMBLY__
@ -76,7 +77,7 @@ enum {
FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR |
FW_FEATURE_RPT_INVALIDATE | FW_FEATURE_FORM2_AFFINITY |
FW_FEATURE_ENERGY_SCALE_INFO,
FW_FEATURE_ENERGY_SCALE_INFO | FW_FEATURE_WATCHDOG,
FW_FEATURE_PSERIES_ALWAYS = 0,
FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_ULTRAVISOR,
FW_FEATURE_POWERNV_ALWAYS = 0,

1
arch/powerpc/platforms/pseries/firmware.c
View File

@ -67,6 +67,7 @@ hypertas_fw_features_table[] = {
{FW_FEATURE_PAPR_SCM, "hcall-scm"},
{FW_FEATURE_RPT_INVALIDATE, "hcall-rpt-invalidate"},
{FW_FEATURE_ENERGY_SCALE_INFO, "hcall-energy-scale-info"},
{FW_FEATURE_WATCHDOG, "hcall-watchdog"},
};
/* Build up the firmware features bitmask using the contents of