Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 345 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h
new file mode 100644
index 000000000..cff5a411e
--- /dev/null
+++ b/arch/powerpc/include/asm/plpar_wrappers.h
@@ -0,0 +1,345 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_PLPAR_WRAPPERS_H
+#define _ASM_POWERPC_PLPAR_WRAPPERS_H
+
+#ifdef CONFIG_PPC_PSERIES
+
+#include <linux/string.h>
+#include <linux/irqflags.h>
+
+#include <asm/hvcall.h>
+#include <asm/paca.h>
+#include <asm/page.h>
+
+static inline long poll_pending(void)
+{
+	return plpar_hcall_norets(H_POLL_PENDING);
+}
+
+static inline u8 get_cede_latency_hint(void)
+{
+	return get_lppaca()->cede_latency_hint;
+}
+
+static inline void set_cede_latency_hint(u8 latency_hint)
+{
+	get_lppaca()->cede_latency_hint = latency_hint;
+}
+
+static inline long cede_processor(void)
+{
+	return plpar_hcall_norets(H_CEDE);
+}
+
+static inline long extended_cede_processor(unsigned long latency_hint)
+{
+	long rc;
+	u8 old_latency_hint = get_cede_latency_hint();
+
+	set_cede_latency_hint(latency_hint);
+
+	rc = cede_processor();
+#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG
+	/* Ensure that H_CEDE returns with IRQs on */
+	if (WARN_ON(!(mfmsr() & MSR_EE)))
+		__hard_irq_enable();
+#endif
+
+	set_cede_latency_hint(old_latency_hint);
+
+	return rc;
+}
+
+static inline long vpa_call(unsigned long flags, unsigned long cpu,
+		unsigned long vpa)
+{
+	flags = flags << H_VPA_FUNC_SHIFT;
+
+	return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
+}
+
+static inline long unregister_vpa(unsigned long cpu)
+{
+	return vpa_call(H_VPA_DEREG_VPA, cpu, 0);
+}
+
+static inline long register_vpa(unsigned long cpu, unsigned long vpa)
+{
+	return vpa_call(H_VPA_REG_VPA, cpu, vpa);
+}
+
+static inline long unregister_slb_shadow(unsigned long cpu)
+{
+	return vpa_call(H_VPA_DEREG_SLB, cpu, 0);
+}
+
+static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
+{
+	return vpa_call(H_VPA_REG_SLB, cpu, vpa);
+}
+
+static inline long unregister_dtl(unsigned long cpu)
+{
+	return vpa_call(H_VPA_DEREG_DTL, cpu, 0);
+}
+
+static inline long register_dtl(unsigned long cpu, unsigned long vpa)
+{
+	return vpa_call(H_VPA_REG_DTL, cpu, vpa);
+}
+
+extern void vpa_init(int cpu);
+
+static inline long plpar_pte_enter(unsigned long flags,
+		unsigned long hpte_group, unsigned long hpte_v,
+		unsigned long hpte_r, unsigned long *slot)
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
+
+	*slot = retbuf[0];
+
+	return rc;
+}
+
+static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
+		unsigned long avpn, unsigned long *old_pteh_ret,
+		unsigned long *old_ptel_ret)
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
+
+	*old_pteh_ret = retbuf[0];
+	*old_ptel_ret = retbuf[1];
+
+	return rc;
+}
+
+/* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
+static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
+		unsigned long avpn, unsigned long *old_pteh_ret,
+		unsigned long *old_ptel_ret)
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
+
+	*old_pteh_ret = retbuf[0];
+	*old_ptel_ret = retbuf[1];
+
+	return rc;
+}
+
+static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
+		unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall(H_READ, retbuf, flags, ptex);
+
+	*old_pteh_ret = retbuf[0];
+	*old_ptel_ret = retbuf[1];
+
+	return rc;
+}
+
+/* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
+static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
+		unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
+
+	*old_pteh_ret = retbuf[0];
+	*old_ptel_ret = retbuf[1];
+
+	return rc;
+}
+
+/*
+ * ptes must be 8*sizeof(unsigned long)
+ */
+static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
+				    unsigned long *ptes)
+
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+
+	rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex);
+
+	memcpy(ptes, retbuf, 8*sizeof(unsigned long));
+
+	return rc;
+}
+
+/*
+ * plpar_pte_read_4_raw can be called in real mode.
+ * ptes must be 8*sizeof(unsigned long)
+ */
+static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
+					unsigned long *ptes)
+
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+
+	rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
+
+	memcpy(ptes, retbuf, 8*sizeof(unsigned long));
+
+	return rc;
+}
+
+static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
+		unsigned long avpn)
+{
+	return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
+}
+
+static inline long plpar_resize_hpt_prepare(unsigned long flags,
+					    unsigned long shift)
+{
+	return plpar_hcall_norets(H_RESIZE_HPT_PREPARE, flags, shift);
+}
+
+static inline long plpar_resize_hpt_commit(unsigned long flags,
+					   unsigned long shift)
+{
+	return plpar_hcall_norets(H_RESIZE_HPT_COMMIT, flags, shift);
+}
+
+static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
+		unsigned long *tce_ret)
+{
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+	rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
+
+	*tce_ret = retbuf[0];
+
+	return rc;
+}
+
+static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
+		unsigned long tceval)
+{
+	return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
+}
+
+static inline long plpar_tce_put_indirect(unsigned long liobn,
+		unsigned long ioba, unsigned long page, unsigned long count)
+{
+	return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
+}
+
+static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
+		unsigned long tceval, unsigned long count)
+{
+	return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
+}
+
+/* Set various resource mode parameters */
+static inline long plpar_set_mode(unsigned long mflags, unsigned long resource,
+		unsigned long value1, unsigned long value2)
+{
+	return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
+}
+
+/*
+ * Enable relocation on exceptions on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long enable_reloc_on_exceptions(void)
+{
+	/* mflags = 3: Exceptions at 0xC000000000004000 */
+	return plpar_set_mode(3, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
+}
+
+/*
+ * Disable relocation on exceptions on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long disable_reloc_on_exceptions(void) {
+	return plpar_set_mode(0, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
+}
+
+/*
+ * Take exceptions in big endian mode on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long enable_big_endian_exceptions(void)
+{
+	/* mflags = 0: big endian exceptions */
+	return plpar_set_mode(0, H_SET_MODE_RESOURCE_LE, 0, 0);
+}
+
+/*
+ * Take exceptions in little endian mode on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long enable_little_endian_exceptions(void)
+{
+	/* mflags = 1: little endian exceptions */
+	return plpar_set_mode(1, H_SET_MODE_RESOURCE_LE, 0, 0);
+}
+
+static inline long plpar_set_ciabr(unsigned long ciabr)
+{
+	return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_CIABR, ciabr, 0);
+}
+
+static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
+{
+	return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0);
+}
+
+static inline long plpar_signal_sys_reset(long cpu)
+{
+	return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu);
+}
+
+static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p)
+{
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+	long rc;
+
+	rc = plpar_hcall(H_GET_CPU_CHARACTERISTICS, retbuf);
+	if (rc == H_SUCCESS) {
+		p->character = retbuf[0];
+		p->behaviour = retbuf[1];
+	}
+
+	return rc;
+}
+
+#else /* !CONFIG_PPC_PSERIES */
+
+static inline long plpar_set_ciabr(unsigned long ciabr)
+{
+	return 0;
+}
+#endif /* CONFIG_PPC_PSERIES */
+
+#endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */