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powerpc/watchpoint: Guest support for 2nd DAWR hcall

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2nd DAWR can be set/unset using H_SET_MODE hcall with resource value 5.
Enable powervm guest support with that. This has no effect on kvm guest
because kvm will return error if guest does hcall with resource value 5.

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/20200723090813.303838-9-ravi.bangoria@linux.ibm.com
This commit is contained in:
Ravi Bangoria
2020-07-23 14:38:11 +05:30
committed by Michael Ellerman
parent 6f3fe297f9
commit 03f3e54abd
5 changed files with 13 additions and 4 deletions
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2
arch/powerpc/kernel/dawr.c
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@@ -37,7 +37,7 @@ int set_dawr(int nr, struct arch_hw_breakpoint *brk)
dawrx |= (mrd & 0x3f) << (63 - 53);
if (ppc_md.set_dawr)
return ppc_md.set_dawr(dawr, dawrx);
return ppc_md.set_dawr(nr, dawr, dawrx);
if (nr == 0) {
mtspr(SPRN_DAWR0, dawr);