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From: AKASHI Takahiro <takahiro.akashi@linaro.org>
To: catalin.marinas@arm.com, will.deacon@arm.com,
	akpm@linux-foundation.org, ard.biesheuvel@linaro.org
Cc: tbaicar@codeaurora.org, bhsharma@redhat.com, dyoung@redhat.com,
	james.morse@arm.com, mark.rutland@arm.com, al.stone@linaro.org,
	graeme.gregory@linaro.org, hanjun.guo@linaro.org,
	lorenzo.pieralisi@arm.com, sudeep.holla@arm.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kexec@lists.infradead.org,
	AKASHI Takahiro <takahiro.akashi@linaro.org>
Subject: [PATCH 3/3] init: map UEFI memory map early if on arm or arm64
Date: Fri, 15 Jun 2018 16:56:23 +0900	[thread overview]
Message-ID: <20180615075623.13454-4-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20180615075623.13454-1-takahiro.akashi@linaro.org>

As ACPI tables may not always be properly aligned, those regions should
be mapped cacheable in order to allow the kernel safe access to them.
UEFI memory map contains necessary information for mappings, and we want
to make sure that it should get accessible before any acpi_os_ioremap()'s.

So, in this patch, efi_enter_virtual_mode(), which was previously named
efi_enable_runtime_services() and invoked via early_initcall on arm/arm64,
is now moved early enough as the first access will occur in
acpi_load_tables() of acpi_early_init().

See a relevant commit:
    arm64: acpi,efi: fix alignment fault in accessing ACPI tables at kdump

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
 init/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/init/main.c b/init/main.c
index 3b4ada11ed52..532fc0d02353 100644
--- a/init/main.c
+++ b/init/main.c
@@ -694,6 +694,9 @@ asmlinkage __visible void __init start_kernel(void)
 	debug_objects_mem_init();
 	setup_per_cpu_pageset();
 	numa_policy_init();
+	if (IS_ENABLED(CONFIG_EFI) &&
+	    (IS_ENABLED(CONFIG_ARM64) || IS_ENABLED(CONFIG_ARM)))
+		efi_enter_virtual_mode();
 	acpi_early_init();
 	if (late_time_init)
 		late_time_init();
-- 
2.17.0


WARNING: multiple messages have this Message-ID (diff)
From: takahiro.akashi@linaro.org (AKASHI Takahiro)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/3] init: map UEFI memory map early if on arm or arm64
Date: Fri, 15 Jun 2018 16:56:23 +0900	[thread overview]
Message-ID: <20180615075623.13454-4-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20180615075623.13454-1-takahiro.akashi@linaro.org>

As ACPI tables may not always be properly aligned, those regions should
be mapped cacheable in order to allow the kernel safe access to them.
UEFI memory map contains necessary information for mappings, and we want
to make sure that it should get accessible before any acpi_os_ioremap()'s.

So, in this patch, efi_enter_virtual_mode(), which was previously named
efi_enable_runtime_services() and invoked via early_initcall on arm/arm64,
is now moved early enough as the first access will occur in
acpi_load_tables() of acpi_early_init().

See a relevant commit:
    arm64: acpi,efi: fix alignment fault in accessing ACPI tables at kdump

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
 init/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/init/main.c b/init/main.c
index 3b4ada11ed52..532fc0d02353 100644
--- a/init/main.c
+++ b/init/main.c
@@ -694,6 +694,9 @@ asmlinkage __visible void __init start_kernel(void)
 	debug_objects_mem_init();
 	setup_per_cpu_pageset();
 	numa_policy_init();
+	if (IS_ENABLED(CONFIG_EFI) &&
+	    (IS_ENABLED(CONFIG_ARM64) || IS_ENABLED(CONFIG_ARM)))
+		efi_enter_virtual_mode();
 	acpi_early_init();
 	if (late_time_init)
 		late_time_init();
-- 
2.17.0

WARNING: multiple messages have this Message-ID (diff)
From: AKASHI Takahiro <takahiro.akashi@linaro.org>
To: catalin.marinas@arm.com, will.deacon@arm.com,
	akpm@linux-foundation.org, ard.biesheuvel@linaro.org
Cc: mark.rutland@arm.com, lorenzo.pieralisi@arm.com,
	graeme.gregory@linaro.org, al.stone@linaro.org,
	bhsharma@redhat.com, tbaicar@codeaurora.org,
	kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	AKASHI Takahiro <takahiro.akashi@linaro.org>,
	james.morse@arm.com, hanjun.guo@linaro.org, sudeep.holla@arm.com,
	dyoung@redhat.com, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/3] init: map UEFI memory map early if on arm or arm64
Date: Fri, 15 Jun 2018 16:56:23 +0900	[thread overview]
Message-ID: <20180615075623.13454-4-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20180615075623.13454-1-takahiro.akashi@linaro.org>

As ACPI tables may not always be properly aligned, those regions should
be mapped cacheable in order to allow the kernel safe access to them.
UEFI memory map contains necessary information for mappings, and we want
to make sure that it should get accessible before any acpi_os_ioremap()'s.

So, in this patch, efi_enter_virtual_mode(), which was previously named
efi_enable_runtime_services() and invoked via early_initcall on arm/arm64,
is now moved early enough as the first access will occur in
acpi_load_tables() of acpi_early_init().

See a relevant commit:
    arm64: acpi,efi: fix alignment fault in accessing ACPI tables at kdump

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
 init/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/init/main.c b/init/main.c
index 3b4ada11ed52..532fc0d02353 100644
--- a/init/main.c
+++ b/init/main.c
@@ -694,6 +694,9 @@ asmlinkage __visible void __init start_kernel(void)
 	debug_objects_mem_init();
 	setup_per_cpu_pageset();
 	numa_policy_init();
+	if (IS_ENABLED(CONFIG_EFI) &&
+	    (IS_ENABLED(CONFIG_ARM64) || IS_ENABLED(CONFIG_ARM)))
+		efi_enter_virtual_mode();
 	acpi_early_init();
 	if (late_time_init)
 		late_time_init();
-- 
2.17.0


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  parent reply	other threads:[~2018-06-15  7:56 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-15  7:56 [PATCH 0/3] arm64: kexec,kdump: fix boot failures on acpi-only system AKASHI Takahiro
2018-06-15  7:56 ` [PATCH 0/3] arm64: kexec, kdump: " AKASHI Takahiro
2018-06-15  7:56 ` AKASHI Takahiro
2018-06-15  7:56 ` [PATCH 1/3] arm64: export memblock_reserve()d regions via /proc/iomem AKASHI Takahiro
2018-06-15  7:56   ` AKASHI Takahiro
2018-06-15  7:56   ` AKASHI Takahiro
2018-06-15  7:56 ` [PATCH 2/3] arm64: acpi,efi: fix alignment fault in accessing ACPI tables at kdump AKASHI Takahiro
2018-06-15  7:56   ` [PATCH 2/3] arm64: acpi, efi: " AKASHI Takahiro
2018-06-15  7:56   ` AKASHI Takahiro
2018-06-15 16:30   ` [PATCH 2/3] arm64: acpi,efi: " James Morse
2018-06-15 16:30     ` James Morse
2018-06-15 16:30     ` James Morse
2018-06-18  6:44     ` AKASHI Takahiro
2018-06-18  6:44       ` AKASHI Takahiro
2018-06-18  6:44       ` AKASHI Takahiro
2018-06-15  7:56 ` AKASHI Takahiro [this message]
2018-06-15  7:56   ` [PATCH 3/3] init: map UEFI memory map early if on arm or arm64 AKASHI Takahiro
2018-06-15  7:56   ` AKASHI Takahiro
2018-06-15 12:52 ` [PATCH 0/3] arm64: kexec,kdump: fix boot failures on acpi-only system Bhupesh Sharma
2018-06-15 12:52   ` [PATCH 0/3] arm64: kexec, kdump: " Bhupesh Sharma
2018-06-15 12:52   ` Bhupesh Sharma
2018-06-15 16:29 ` [PATCH 0/3] arm64: kexec,kdump: " James Morse
2018-06-15 16:29   ` James Morse
2018-06-15 16:29   ` James Morse
2018-06-18  5:57   ` AKASHI Takahiro
2018-06-18  5:57     ` AKASHI Takahiro
2018-06-18  5:57     ` AKASHI Takahiro

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