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powerpc/watchpoint: Introduce macros for watchpoint length

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We are hadrcoding length everywhere in the watchpoint code. Introduce
macros for the length and use them.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191017093204.7511-2-ravi.bangoria@linux.ibm.com
This commit is contained in:
Ravi Bangoria
2019-10-17 15:01:58 +05:30
committed by Michael Ellerman
parent 4e706af3cd
commit b811be615c
4 changed files with 9 additions and 6 deletions
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4
arch/powerpc/kernel/hw_breakpoint.c
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@@ -163,9 +163,9 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
*/
if (!ppc_breakpoint_available())
return -ENODEV;
length_max = 8; /* DABR */
length_max = DABR_MAX_LEN; /* DABR */
if (dawr_enabled()) {
length_max = 512 ; /* 64 doublewords */
length_max = DAWR_MAX_LEN; /* 64 doublewords */
/* DAWR region can't cross 512 boundary */
if ((attr->bp_addr >> 9) !=
((attr->bp_addr + attr->bp_len - 1) >> 9))