kernel.git/arch/x86/platform/efi, branch linux-3.17.y

arch/x86: Remove efi_set_rtc_mmss()

2014-07-18T20:23:59Z

efi_set_rtc_mmss() is never used to set RTC due to bugs found on many EFI platforms. It is set directly by mach_set_rtc_mmss(). Hence, remove unused efi_set_rtc_mmss() function. Signed-off-by: Daniel Kiper Signed-off-by: Matt Fleming

arch/x86: Remove redundant set_bit(EFI_MEMMAP) call

2014-07-18T20:23:57Z

Remove redundant set_bit(EFI_MEMMAP, &efi.flags) call. It is executed earlier in efi_memmap_init(). Signed-off-by: Daniel Kiper Signed-off-by: Matt Fleming

arch/x86: Remove redundant set_bit(EFI_SYSTEM_TABLES) call

2014-07-18T20:23:56Z

Remove redundant set_bit(EFI_SYSTEM_TABLES, &efi.flags) call. It is executed earlier in efi_systab_init(). Signed-off-by: Daniel Kiper Signed-off-by: Matt Fleming

efi: Introduce EFI_PARAVIRT flag

2014-07-18T20:23:55Z

Introduce EFI_PARAVIRT flag. If it is set then kernel runs on EFI platform but it has not direct control on EFI stuff like EFI runtime, tables, structures, etc. If not this means that Linux Kernel has direct access to EFI infrastructure and everything runs as usual. This functionality is used in Xen dom0 because hypervisor has full control on EFI stuff and all calls from dom0 to EFI must be requested via special hypercall which in turn executes relevant EFI code in behalf of dom0. Signed-off-by: Daniel Kiper Signed-off-by: Matt Fleming

arch/x86: Do not access EFI memory map if it is not available

2014-07-18T20:23:54Z

Do not access EFI memory map if it is not available. At least Xen dom0 EFI implementation does not have an access to it. Signed-off-by: Daniel Kiper Signed-off-by: Matt Fleming

efi: Use early_mem() instead of early_io()

2014-07-18T20:23:54Z

Use early_mem*() instead of early_io*() because all mapped EFI regions are memory (usually RAM but they could also be ROM, EPROM, EEPROM, flash, etc.) not I/O regions. Additionally, I/O family calls do not work correctly under Xen in our case. early_ioremap() skips the PFN to MFN conversion when building the PTE. Using it for memory will attempt to map the wrong machine frame. However, all artificial EFI structures created under Xen live in dom0 memory and should be mapped/unmapped using early_mem*() family calls which map domain memory. Signed-off-by: Daniel Kiper Cc: Leif Lindholm Cc: Mark Salter Signed-off-by: Matt Fleming

x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag

2014-07-18T20:23:52Z

It appears that the BayTrail-T class of hardware requires EFI in order to powerdown and reboot and no other reliable method exists. This quirk is generally applicable to all hardware that has the ACPI Hardware Reduced bit set, since usually ACPI would be the preferred method. Cc: Len Brown Cc: Mark Salter Cc: "Rafael J. Wysocki" Signed-off-by: Matt Fleming

efi/x86: Move UEFI Runtime Services wrappers to generic code

2014-07-07T19:12:53Z

In order for other archs (such as arm64) to be able to reuse the virtual mode function call wrappers, move them to drivers/firmware/efi/runtime-wrappers.c. Signed-off-by: Ard Biesheuvel Signed-off-by: Matt Fleming

x86/efi: Use early_memunmap() to squelch sparse errors

2014-06-19T10:14:33Z

The kbuild reports the following sparse errors, >> arch/x86/platform/efi/quirks.c:242:23: sparse: incorrect type in >> argument 1 (different address spaces) arch/x86/platform/efi/quirks.c:242:23: expected void [noderef] *addr arch/x86/platform/efi/quirks.c:242:23: got void *[assigned] tablep >> arch/x86/platform/efi/quirks.c:245:23: sparse: incorrect type in >> argument 1 (different address spaces) arch/x86/platform/efi/quirks.c:245:23: expected void [noderef] *addr arch/x86/platform/efi/quirks.c:245:23: got struct efi_setup_data *[assigned] data Dave Young had made previous attempts to convert the early_iounmap() calls to early_memunmap() but ran into merge conflicts with commit 9e5c33d7aeee ("mm: create generic early_ioremap() support"). Now that we've got that commit in place we can switch to using early_memunmap() since we're already using early_memremap() in efi_reuse_config(). Cc: Dave Young Cc: Saurabh Tangri Signed-off-by: Matt Fleming

x86/efi: Move all workarounds to a separate file quirks.c