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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Al Stone <ahs3@redhat.com>
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Date: Tue, 27 Feb 2018 00:21:23 -0500
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Subject: [PATCH] ACPI: APEI: arm64: Ignore broken HPE moonshot APEI support
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Message-id: <20180227002123.21608-1-ahs3@redhat.com>
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Patchwork-id: 206052
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O-Subject: [RHEL8 BZ1518076 PATCH] ACPI: APEI: arm64: Ignore broken HPE moonshot APEI support
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Bugzilla: 1518076
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RH-Acked-by: Mark Salter <msalter@redhat.com>
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RH-Acked-by: Jeremy McNicoll <jmcnicol@redhat.com>
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1518076
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Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=15417197
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Tested: compile-only; several other patches are required for full booting
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        QE has tested limited boot (see comment#12 of BZ)
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This is a re-post of a RHEL-ALT-7.5 patch specific to aarch64 moonshots
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that we use in beaker.  It is required for these machines to boot.
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    commit 8a663a264863efedf8bb4a9d76ac603920fdd739
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    Author: Robert Richter <rrichter@redhat.com>
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    Date:   Wed Aug 16 19:49:30 2017 -0400
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    [acpi] APEI: arm64: Ignore broken HPE moonshot APEI support
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    From: Mark Salter <msalter@redhat.com>
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    Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1344237
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    Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=13768971
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    Tested: Booted on moonshot with patched 4.11.0-20 kernel
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    Upstream: RHEL-only
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    The aarch64 HP moonshot platforms we have in beaker and elsewhere have
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    a firmware bug which causes a spurious fatal memory error via APEI at
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    boot time. This platform is no longer supported and no further firmware
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    updates are expected. This is a downstream-only hack to avoid the problem
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    by bailing out of HEST table probing if we detect a moonshot HEST table.
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    Signed-off-by: Mark Salter <msalter@redhat.com>
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    Signed-off-by: Robert Richter <rrichter@redhat.com>
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    Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
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Upstream Status: RHEL only
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Signed-off-by: Al Stone <ahs3@redhat.com>
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Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
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---
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 drivers/acpi/apei/hest.c | 8 ++++++++
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 1 file changed, 8 insertions(+)
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diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
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index 6e980fe16772..37bc003e7a83 100644
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--- a/drivers/acpi/apei/hest.c
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+++ b/drivers/acpi/apei/hest.c
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@@ -88,6 +88,14 @@ int apei_hest_parse(apei_hest_func_t func, void *data)
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 	if (hest_disable || !hest_tab)
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 		return -EINVAL;
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+#ifdef CONFIG_ARM64
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+	/* Ignore broken firmware */
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+	if (!strncmp(hest_tab->header.oem_id, "HPE   ", 6) &&
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+	    !strncmp(hest_tab->header.oem_table_id, "ProLiant", 8) &&
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+	    MIDR_IMPLEMENTOR(read_cpuid_id()) == ARM_CPU_IMP_APM)
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+		return -EINVAL;
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+#endif
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+
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 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
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 	for (i = 0; i < hest_tab->error_source_count; i++) {
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 		len = hest_esrc_len(hest_hdr);
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-- 
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2.28.0
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