disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/arch/powerpc/include/asm/plpar_wrappers.h
..
..
@@ -312,7 +312,12 @@
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312
 
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 static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
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 {
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-	return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0);
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+	return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR0, dawr0, dawrx0);
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+}
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+
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+static inline long plpar_set_watchpoint1(unsigned long dawr1, unsigned long dawrx1)
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+{
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+	return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR1, dawr1, dawrx1);
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 }
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 static inline long plpar_signal_sys_reset(long cpu)
..
..
@@ -334,12 +339,70 @@
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 	return rc;
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 }
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+/*
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+ * Wrapper to H_RPT_INVALIDATE hcall that handles return values appropriately
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+ *
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+ * - Returns H_SUCCESS on success
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+ * - For H_BUSY return value, we retry the hcall.
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+ * - For any other hcall failures, attempt a full flush once before
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+ *   resorting to BUG().
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+ *
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+ * Note: This hcall is expected to fail only very rarely. The correct
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+ * error recovery of killing the process/guest will be eventually
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+ * needed.
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+ */
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+static inline long pseries_rpt_invalidate(u32 pid, u64 target, u64 type,
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+					  u64 page_sizes, u64 start, u64 end)
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+{
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+	long rc;
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+	unsigned long all;
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+
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+	while (true) {
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+		rc = plpar_hcall_norets(H_RPT_INVALIDATE, pid, target, type,
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+					page_sizes, start, end);
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+		if (rc == H_BUSY) {
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+			cpu_relax();
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+			continue;
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+		} else if (rc == H_SUCCESS)
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+			return rc;
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+
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+		/* Flush request failed, try with a full flush once */
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+		if (type & H_RPTI_TYPE_NESTED)
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+			all = H_RPTI_TYPE_NESTED | H_RPTI_TYPE_NESTED_ALL;
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+		else
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+			all = H_RPTI_TYPE_ALL;
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+retry:
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+		rc = plpar_hcall_norets(H_RPT_INVALIDATE, pid, target,
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+					all, page_sizes, 0, -1UL);
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+		if (rc == H_BUSY) {
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+			cpu_relax();
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+			goto retry;
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+		} else if (rc == H_SUCCESS)
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+			return rc;
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+
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+		BUG();
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+	}
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+}
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+
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 #else /* !CONFIG_PPC_PSERIES */
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388
 
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 static inline long plpar_set_ciabr(unsigned long ciabr)
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 {
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 	return 0;
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 }
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+
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+static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
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+				    unsigned long *ptes)
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+{
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+	return 0;
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+}
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+
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+static inline long pseries_rpt_invalidate(u32 pid, u64 target, u64 type,
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+					  u64 page_sizes, u64 start, u64 end)
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+{
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+	return 0;
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+}
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+
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 #endif /* CONFIG_PPC_PSERIES */
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407
 
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 #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */