| Message ID | 20180619064424.6642-3-takahiro.akashi@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Akashi, On 19/06/18 07:44, AKASHI Takahiro wrote: > Under the current implementation, UEFI memory map will be mapped and made > available in virtual mappings only if runtime services are enabled. > But in a later patch, we want to use UEFI memory map in acpi_os_ioremap() > to create mappings of ACPI tables using memory attributes described in > UEFI memory map. > > So, as a first step, arm_enter_runtime_services() will be modified > so that UEFI memory map will be always accessible. > > See a relevant commit: > arm64: acpi: fix alignment fault in accessing ACPI tables For what its worth: Acked-by: James Morse <james.morse@arm.com> Thanks, James
On 19 June 2018 at 08:44, AKASHI Takahiro <takahiro.akashi@linaro.org> wrote: > Under the current implementation, UEFI memory map will be mapped and made > available in virtual mappings only if runtime services are enabled. > But in a later patch, we want to use UEFI memory map in acpi_os_ioremap() > to create mappings of ACPI tables using memory attributes described in > UEFI memory map. > > So, as a first step, arm_enter_runtime_services() will be modified > so that UEFI memory map will be always accessible. > > See a relevant commit: > arm64: acpi: fix alignment fault in accessing ACPI tables > > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> > Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> This may be taken via the arm64 tree. > --- > drivers/firmware/efi/arm-runtime.c | 14 +++++++------- > 1 file changed, 7 insertions(+), 7 deletions(-) > > diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c > index 5889cbea60b8..30ac5c82051e 100644 > --- a/drivers/firmware/efi/arm-runtime.c > +++ b/drivers/firmware/efi/arm-runtime.c > @@ -115,6 +115,13 @@ static int __init arm_enable_runtime_services(void) > return 0; > } > > + mapsize = efi.memmap.desc_size * efi.memmap.nr_map; > + > + if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { > + pr_err("Failed to remap EFI memory map\n"); > + return 0; > + } > + > if (efi_runtime_disabled()) { > pr_info("EFI runtime services will be disabled.\n"); > return 0; > @@ -127,13 +134,6 @@ static int __init arm_enable_runtime_services(void) > > pr_info("Remapping and enabling EFI services.\n"); > > - mapsize = efi.memmap.desc_size * efi.memmap.nr_map; > - > - if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { > - pr_err("Failed to remap EFI memory map\n"); > - return -ENOMEM; > - } > - > if (!efi_virtmap_init()) { > pr_err("UEFI virtual mapping missing or invalid -- runtime services will not be available\n"); > return -ENOMEM; > -- > 2.17.0 >
diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c index 5889cbea60b8..30ac5c82051e 100644 --- a/drivers/firmware/efi/arm-runtime.c +++ b/drivers/firmware/efi/arm-runtime.c @@ -115,6 +115,13 @@ static int __init arm_enable_runtime_services(void) return 0; } + mapsize = efi.memmap.desc_size * efi.memmap.nr_map; + + if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { + pr_err("Failed to remap EFI memory map\n"); + return 0; + } + if (efi_runtime_disabled()) { pr_info("EFI runtime services will be disabled.\n"); return 0; @@ -127,13 +134,6 @@ static int __init arm_enable_runtime_services(void) pr_info("Remapping and enabling EFI services.\n"); - mapsize = efi.memmap.desc_size * efi.memmap.nr_map; - - if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { - pr_err("Failed to remap EFI memory map\n"); - return -ENOMEM; - } - if (!efi_virtmap_init()) { pr_err("UEFI virtual mapping missing or invalid -- runtime services will not be available\n"); return -ENOMEM;
Under the current implementation, UEFI memory map will be mapped and made available in virtual mappings only if runtime services are enabled. But in a later patch, we want to use UEFI memory map in acpi_os_ioremap() to create mappings of ACPI tables using memory attributes described in UEFI memory map. So, as a first step, arm_enter_runtime_services() will be modified so that UEFI memory map will be always accessible. See a relevant commit: arm64: acpi: fix alignment fault in accessing ACPI tables Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- drivers/firmware/efi/arm-runtime.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)