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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Al Stone <ahs3@redhat.com>
Date: Tue, 27 Feb 2018 00:21:23 -0500
Subject: [PATCH] ACPI: APEI: arm64: Ignore broken HPE moonshot APEI support

Message-id: <20180227002123.21608-1-ahs3@redhat.com>
Patchwork-id: 206052
O-Subject: [RHEL8 BZ1518076 PATCH] ACPI: APEI: arm64: Ignore broken HPE moonshot APEI support
Bugzilla: 1518076
RH-Acked-by: Mark Salter <msalter@redhat.com>
RH-Acked-by: Jeremy McNicoll <jmcnicol@redhat.com>

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1518076
Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=15417197
Tested: compile-only; several other patches are required for full booting
        QE has tested limited boot (see comment#12 of BZ)

This is a re-post of a RHEL-ALT-7.5 patch specific to aarch64 moonshots
that we use in beaker.  It is required for these machines to boot.

    commit 8a663a264863efedf8bb4a9d76ac603920fdd739
    Author: Robert Richter <rrichter@redhat.com>
    Date:   Wed Aug 16 19:49:30 2017 -0400

    [acpi] APEI: arm64: Ignore broken HPE moonshot APEI support

    From: Mark Salter <msalter@redhat.com>
    Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1344237
    Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=13768971
    Tested: Booted on moonshot with patched 4.11.0-20 kernel
    Upstream: RHEL-only

    The aarch64 HP moonshot platforms we have in beaker and elsewhere have
    a firmware bug which causes a spurious fatal memory error via APEI at
    boot time. This platform is no longer supported and no further firmware
    updates are expected. This is a downstream-only hack to avoid the problem
    by bailing out of HEST table probing if we detect a moonshot HEST table.

    Signed-off-by: Mark Salter <msalter@redhat.com>
    Signed-off-by: Robert Richter <rrichter@redhat.com>
    Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Upstream Status: RHEL only
Signed-off-by: Al Stone <ahs3@redhat.com>
Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
---
 drivers/acpi/apei/hest.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 6e980fe16772..37bc003e7a83 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -88,6 +88,14 @@ int apei_hest_parse(apei_hest_func_t func, void *data)
 	if (hest_disable || !hest_tab)
 		return -EINVAL;

+#ifdef CONFIG_ARM64
+	/* Ignore broken firmware */
+	if (!strncmp(hest_tab->header.oem_id, "HPE   ", 6) &&
+	    !strncmp(hest_tab->header.oem_table_id, "ProLiant", 8) &&
+	    MIDR_IMPLEMENTOR(read_cpuid_id()) == ARM_CPU_IMP_APM)
+		return -EINVAL;
+#endif
+
 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
 	for (i = 0; i < hest_tab->error_source_count; i++) {
 		len = hest_esrc_len(hest_hdr);
-- 
2.28.0