Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 161 insertions, 0 deletions

diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
new file mode 100644
index 000000000..faa3a4b8e
--- /dev/null
+++ b/drivers/s390/char/sclp_early.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SCLP early driver
+ *
+ * Copyright IBM Corp. 2013
+ */
+
+#define KMSG_COMPONENT "sclp_early"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/errno.h>
+#include <asm/ctl_reg.h>
+#include <asm/sclp.h>
+#include <asm/ipl.h>
+#include "sclp_sdias.h"
+#include "sclp.h"
+
+static struct sclp_ipl_info sclp_ipl_info;
+
+struct sclp_info sclp;
+EXPORT_SYMBOL(sclp);
+
+static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
+{
+	struct sclp_core_entry *cpue;
+	u16 boot_cpu_address, cpu;
+
+	if (sclp_early_get_info(sccb))
+		return;
+
+	sclp.facilities = sccb->facilities;
+	sclp.has_sprp = !!(sccb->fac84 & 0x02);
+	sclp.has_core_type = !!(sccb->fac84 & 0x01);
+	sclp.has_gsls = !!(sccb->fac85 & 0x80);
+	sclp.has_64bscao = !!(sccb->fac116 & 0x80);
+	sclp.has_cmma = !!(sccb->fac116 & 0x40);
+	sclp.has_esca = !!(sccb->fac116 & 0x08);
+	sclp.has_pfmfi = !!(sccb->fac117 & 0x40);
+	sclp.has_ibs = !!(sccb->fac117 & 0x20);
+	sclp.has_gisaf = !!(sccb->fac118 & 0x08);
+	sclp.has_hvs = !!(sccb->fac119 & 0x80);
+	sclp.has_kss = !!(sccb->fac98 & 0x01);
+	if (sccb->fac85 & 0x02)
+		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
+	if (sccb->fac91 & 0x40)
+		S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
+	if (sccb->cpuoff > 134)
+		sclp.has_diag318 = !!(sccb->byte_134 & 0x80);
+	if (sccb->cpuoff > 137)
+		sclp.has_sipl = !!(sccb->cbl & 0x4000);
+	sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
+	sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
+	sclp.rzm <<= 20;
+	sclp.ibc = sccb->ibc;
+
+	if (sccb->hamaxpow && sccb->hamaxpow < 64)
+		sclp.hamax = (1UL << sccb->hamaxpow) - 1;
+	else
+		sclp.hamax = U64_MAX;
+
+	if (!sccb->hcpua) {
+		if (MACHINE_IS_VM)
+			sclp.max_cores = 64;
+		else
+			sclp.max_cores = sccb->ncpurl;
+	} else {
+		sclp.max_cores = sccb->hcpua + 1;
+	}
+
+	boot_cpu_address = stap();
+	cpue = (void *)sccb + sccb->cpuoff;
+	for (cpu = 0; cpu < sccb->ncpurl; cpue++, cpu++) {
+		if (boot_cpu_address != cpue->core_id)
+			continue;
+		sclp.has_siif = cpue->siif;
+		sclp.has_sigpif = cpue->sigpif;
+		sclp.has_sief2 = cpue->sief2;
+		sclp.has_gpere = cpue->gpere;
+		sclp.has_ib = cpue->ib;
+		sclp.has_cei = cpue->cei;
+		sclp.has_skey = cpue->skey;
+		break;
+	}
+
+	/* Save IPL information */
+	sclp_ipl_info.is_valid = 1;
+	if (sccb->fac91 & 0x2)
+		sclp_ipl_info.has_dump = 1;
+	memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);
+
+	if (sccb->hsa_size)
+		sclp.hsa_size = (sccb->hsa_size - 1) * PAGE_SIZE;
+	sclp.mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
+	sclp.mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
+	sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
+
+	sclp.hmfai = sccb->hmfai;
+	sclp.has_dirq = !!(sccb->cpudirq & 0x80);
+}
+
+/*
+ * This function will be called after sclp_early_facilities_detect(), which gets
+ * called from early.c code. The sclp_early_facilities_detect() function retrieves
+ * and saves the IPL information.
+ */
+void __init sclp_early_get_ipl_info(struct sclp_ipl_info *info)
+{
+	*info = sclp_ipl_info;
+}
+
+static struct sclp_core_info sclp_early_core_info __initdata;
+static int sclp_early_core_info_valid __initdata;
+
+static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb)
+{
+	if (!SCLP_HAS_CPU_INFO)
+		return;
+	memset(sccb, 0, sizeof(*sccb));
+	sccb->header.length = sizeof(*sccb);
+	if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb))
+		return;
+	if (sccb->header.response_code != 0x0010)
+		return;
+	sclp_fill_core_info(&sclp_early_core_info, sccb);
+	sclp_early_core_info_valid = 1;
+}
+
+int __init sclp_early_get_core_info(struct sclp_core_info *info)
+{
+	if (!sclp_early_core_info_valid)
+		return -EIO;
+	*info = sclp_early_core_info;
+	return 0;
+}
+
+static void __init sclp_early_console_detect(struct init_sccb *sccb)
+{
+	if (sccb->header.response_code != 0x20)
+		return;
+
+	if (sclp_early_con_check_vt220(sccb))
+		sclp.has_vt220 = 1;
+
+	if (sclp_early_con_check_linemode(sccb))
+		sclp.has_linemode = 1;
+}
+
+void __init sclp_early_detect(void)
+{
+	void *sccb = sclp_early_sccb;
+
+	sclp_early_facilities_detect(sccb);
+	sclp_early_init_core_info(sccb);
+
+	/*
+	 * Turn off SCLP event notifications.  Also save remote masks in the
+	 * sccb.  These are sufficient to detect sclp console capabilities.
+	 */
+	sclp_early_set_event_mask(sccb, 0, 0);
+	sclp_early_console_detect(sccb);
+}