[PATCH v3 0/8] x86, boot: clean up setup_data handling

Yinghai Lu
2015-03-08T00:57:25Z

Now setup_data is reserved via memblock and e820 and different
handlers have different ways, and it is confusing.
1. SETUP_E820_EXT: is consumed early and will not copy or access again.
have memory wasted.
2. SETUP_EFI: is accessed via ioremap every time at early stage.
have memory wasted.
3. SETUP_DTB: is copied locally.
have memory wasted.
4. SETUP_PCI: is accessed via ioremap for every pci devices, even run-time.
5. SETUP_KASLR: is accessed early, will not copy or access again.
have memory wasted.

Also setup_data is exported to debugfs for debug purpose.

Here will convert to let every handler to decide how to handle it.
and will not reserve the setup_data generally, so will not
waste memory and also make memblock/e820 keep page aligned.
1. not touch E820 anymore.
2. copy SETUP_EFI to __initdata variable and access it without ioremap.
3. SETUP_DTB: reserver and copy to local and free.
4. SETUP_PCI: reverve localy and convert to list, to avoid keeping ioremap.
5. export SETUP_PCI via sysfs.

Also put them in:
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-4.0-rc2-setup_data

Should be materials for v4.1.

Thanks

Yinghai Lu

-v3: separated with kasl patches, and fix early_ioremap return checking.

Yinghai Lu (8):
x86: Kill E820_RESERVED_KERN
x86, efi: Copy SETUP_EFI data and access directly
x86, of: Let add_dtb reserve setup_data locally
x86, boot: Add add_pci handler for SETUP_PCI
x86: Kill not used setup_data handling code
x86, boot, PCI: Convert SETUP_PCI data to list
x86, boot, PCI: Copy SETUP_PCI rom to kernel space
x86, boot, PCI: Export SETUP_PCI data via sysfs

arch/x86/include/asm/efi.h | 2 +-
arch/x86/include/asm/pci.h | 4 +
arch/x86/include/asm/prom.h | 9 +-
arch/x86/include/uapi/asm/e820.h | 9 --
arch/x86/kernel/devicetree.c | 43 +++---
arch/x86/kernel/e820.c | 6 +-
arch/x86/kernel/kdebugfs.c | 142 ------------------
arch/x86/kernel/setup.c | 52 ++-----
arch/x86/kernel/tboot.c | 3 +-
arch/x86/mm/init_64.c | 11 +-
arch/x86/pci/common.c | 316 ++++++++++++++++++++++++++++++++++++---
arch/x86/platform/efi/efi.c | 13 +-
arch/x86/platform/efi/efi_64.c | 13 +-
arch/x86/platform/efi/quirks.c | 23 +--
14 files changed, 371 insertions(+), 275 deletions(-)

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1.8.4.5