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efi/x86: Merge the setup_efi_pci32() and setup_efi_pci64() routines

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After merging the 32-bit and 64-bit versions of the code that invokes
the PCI I/O protocol methods to preserve PCI ROM images in commit:

  2c3625cb9f ("efi/x86: Fold __setup_efi_pci32() and __setup_efi_pci64() ...")

there are still separate code paths for 32-bit and 64-bit, where the only
difference is the size of a EFI_HANDLE. So let's parameterize a single
implementation for that difference only, and get rid of the two copies of
the code.

While at it, rename __setup_efi_pci() to preserve_pci_rom_image() to
better reflect its purpose.

Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180720014726.24031-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ard Biesheuvel 2018-07-20 10:47:19 +09:00 committed by Ingo Molnar
parent 83a0a2ea0b
commit 75c5a713ab
1 changed files with 32 additions and 91 deletions
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123
arch/x86/boot/compressed/eboot.c
View file

@ -111,7 +111,7 @@ void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
}
static efi_status_t
__setup_efi_pci(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
{
struct pci_setup_rom *rom = NULL;
efi_status_t status;
@ -181,92 +181,6 @@ __setup_efi_pci(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
return status;
}
static void
setup_efi_pci32(struct boot_params *params, void **pci_handle, unsigned long size)
{
efi_pci_io_protocol_t *pci = NULL;
efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
u32 *handles = (u32 *)(unsigned long)pci_handle;
efi_status_t status;
unsigned long nr_pci;
struct setup_data *data;
int i;
data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
while (data && data->next)
data = (struct setup_data *)(unsigned long)data->next;
nr_pci = size / sizeof(u32);
for (i = 0; i < nr_pci; i++) {
struct pci_setup_rom *rom = NULL;
u32 h = handles[i];
status = efi_call_early(handle_protocol, h,
&pci_proto, (void **)&pci);
if (status != EFI_SUCCESS)
continue;
if (!pci)
continue;
status = __setup_efi_pci(pci, &rom);
if (status != EFI_SUCCESS)
continue;
if (data)
data->next = (unsigned long)rom;
else
params->hdr.setup_data = (unsigned long)rom;
data = (struct setup_data *)rom;
}
}
static void
setup_efi_pci64(struct boot_params *params, void **pci_handle, unsigned long size)
{
efi_pci_io_protocol_t *pci = NULL;
efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
u64 *handles = (u64 *)(unsigned long)pci_handle;
efi_status_t status;
unsigned long nr_pci;
struct setup_data *data;
int i;
data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
while (data && data->next)
data = (struct setup_data *)(unsigned long)data->next;
nr_pci = size / sizeof(u64);
for (i = 0; i < nr_pci; i++) {
struct pci_setup_rom *rom = NULL;
u64 h = handles[i];
status = efi_call_early(handle_protocol, h,
&pci_proto, (void **)&pci);
if (status != EFI_SUCCESS)
continue;
if (!pci)
continue;
status = __setup_efi_pci(pci, &rom);
if (status != EFI_SUCCESS)
continue;
if (data)
data->next = (unsigned long)rom;
else
params->hdr.setup_data = (unsigned long)rom;
data = (struct setup_data *)rom;
}
}
/*
* There's no way to return an informative status from this function,
* because any analysis (and printing of error messages) needs to be
@ -282,6 +196,9 @@ static void setup_efi_pci(struct boot_params *params)
void **pci_handle = NULL;
efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
unsigned long size = 0;
unsigned long nr_pci;
struct setup_data *data;
int i;
status = efi_call_early(locate_handle,
EFI_LOCATE_BY_PROTOCOL,
@ -305,10 +222,34 @@ static void setup_efi_pci(struct boot_params *params)
if (status != EFI_SUCCESS)
goto free_handle;
if (efi_early->is64)
setup_efi_pci64(params, pci_handle, size);
else
setup_efi_pci32(params, pci_handle, size);
data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
while (data && data->next)
data = (struct setup_data *)(unsigned long)data->next;
nr_pci = size / (efi_is_64bit() ? sizeof(u64) : sizeof(u32));
for (i = 0; i < nr_pci; i++) {
efi_pci_io_protocol_t *pci = NULL;
struct pci_setup_rom *rom;
status = efi_call_early(handle_protocol,
efi_is_64bit() ? ((u64 *)pci_handle)[i]
: ((u32 *)pci_handle)[i],
&pci_proto, (void **)&pci);
if (status != EFI_SUCCESS || !pci)
continue;
status = preserve_pci_rom_image(pci, &rom);
if (status != EFI_SUCCESS)
continue;
if (data)
data->next = (unsigned long)rom;
else
params->hdr.setup_data = (unsigned long)rom;
data = (struct setup_data *)rom;
}
free_handle:
efi_call_early(free_pool, pci_handle);