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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] x86/EFI: retrieve PCI ROM contents not accessible through BARs
Linux 3.8-rc added code to do this, so we need to support this in the
hypervisor for Dom0 to be able to get at the same information as a
native kernel.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
--- a/xen/arch/x86/efi/boot.c
+++ b/xen/arch/x86/efi/boot.c
@@ -1,5 +1,6 @@
#include "efi.h"
#include <efi/efiprot.h>
+#include <efi/efipciio.h>
#include <public/xen.h>
#include <xen/compile.h>
#include <xen/ctype.h>
@@ -8,6 +9,7 @@
#include <xen/keyhandler.h>
#include <xen/lib.h>
#include <xen/multiboot.h>
+#include <xen/pci_regs.h>
#include <xen/pfn.h>
#if EFI_PAGE_SIZE != PAGE_SIZE
# error Cannot use xen/pfn.h here!
@@ -570,6 +572,92 @@ static void __init edd_put_string(u8 *ds
}
#define edd_put_string(d, s) edd_put_string(d, ARRAY_SIZE(d), s)
+static void __init setup_efi_pci(void)
+{
+ EFI_STATUS status;
+ EFI_HANDLE *handles;
+ static EFI_GUID __initdata pci_guid = EFI_PCI_IO_PROTOCOL;
+ UINTN i, nr_pci, size = 0;
+ struct efi_pci_rom *last = NULL;
+
+ status = efi_bs->LocateHandle(ByProtocol, &pci_guid, NULL, &size, NULL);
+ if ( status == EFI_BUFFER_TOO_SMALL )
+ status = efi_bs->AllocatePool(EfiLoaderData, size, (void **)&handles);
+ if ( !EFI_ERROR(status) )
+ status = efi_bs->LocateHandle(ByProtocol, &pci_guid, NULL, &size,
+ handles);
+ if ( EFI_ERROR(status) )
+ size = 0;
+
+ nr_pci = size / sizeof(*handles);
+ for ( i = 0; i < nr_pci; ++i )
+ {
+ EFI_PCI_IO *pci = NULL;
+ u64 attributes;
+ struct efi_pci_rom *rom, *va;
+ UINTN segment, bus, device, function;
+
+ status = efi_bs->HandleProtocol(handles[i], &pci_guid, (void **)&pci);
+ if ( EFI_ERROR(status) || !pci || !pci->RomImage || !pci->RomSize )
+ continue;
+
+ status = pci->Attributes(pci, EfiPciIoAttributeOperationGet, 0,
+ &attributes);
+ if ( EFI_ERROR(status) ||
+ !(attributes & EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM) ||
+ EFI_ERROR(pci->GetLocation(pci, &segment, &bus, &device,
+ &function)) )
+ continue;
+
+ DisplayUint(segment, 4);
+ PrintStr(L":");
+ DisplayUint(bus, 2);
+ PrintStr(L":");
+ DisplayUint(device, 2);
+ PrintStr(L".");
+ DisplayUint(function, 1);
+ PrintStr(L": ROM: ");
+ DisplayUint(pci->RomSize, 0);
+ PrintStr(L" bytes at ");
+ DisplayUint((UINTN)pci->RomImage, 0);
+ PrintStr(newline);
+
+ size = pci->RomSize + sizeof(*rom);
+ status = efi_bs->AllocatePool(EfiRuntimeServicesData, size,
+ (void **)&rom);
+ if ( EFI_ERROR(status) )
+ continue;
+
+ rom->next = NULL;
+ rom->size = pci->RomSize;
+
+ status = pci->Pci.Read(pci, EfiPciIoWidthUint16, PCI_VENDOR_ID, 1,
+ &rom->vendor);
+ if ( !EFI_ERROR(status) )
+ status = pci->Pci.Read(pci, EfiPciIoWidthUint16, PCI_DEVICE_ID, 1,
+ &rom->devid);
+ if ( EFI_ERROR(status) )
+ {
+ efi_bs->FreePool(rom);
+ continue;
+ }
+
+ rom->segment = segment;
+ rom->bus = bus;
+ rom->devfn = (device << 3) | function;
+ memcpy(rom->data, pci->RomImage, pci->RomSize);
+
+ va = (void *)rom + DIRECTMAP_VIRT_START;
+ if ( last )
+ last->next = va;
+ else
+ efi_pci_roms = va;
+ last = rom;
+ }
+
+ efi_bs->FreePool(handles);
+}
+
static int __init set_color(u32 mask, int bpp, u8 *pos, u8 *sz)
{
if ( bpp < 0 )
@@ -1140,6 +1228,9 @@ efi_start(EFI_HANDLE ImageHandle, EFI_SY
if (efi.smbios != EFI_INVALID_TABLE_ADDR)
dmi_efi_get_table((void *)(long)efi.smbios);
+ /* Collect PCI ROM contents. */
+ setup_efi_pci();
+
/* Allocate space for trampoline (in first Mb). */
cfg.addr = 0x100000;
cfg.size = trampoline_end - trampoline_start;
--- a/xen/arch/x86/efi/efi.h
+++ b/xen/arch/x86/efi/efi.h
@@ -9,6 +9,14 @@
#include <xen/spinlock.h>
#include <asm/page.h>
+struct efi_pci_rom {
+ const struct efi_pci_rom *next;
+ u16 vendor, devid, segment;
+ u8 bus, devfn;
+ unsigned long size;
+ unsigned char data[];
+};
+
extern unsigned int efi_num_ct;
extern EFI_CONFIGURATION_TABLE *efi_ct;
@@ -22,5 +30,7 @@ extern void *efi_memmap;
extern l4_pgentry_t *efi_l4_pgtable;
+extern const struct efi_pci_rom *efi_pci_roms;
+
unsigned long efi_rs_enter(void);
void efi_rs_leave(unsigned long);
--- a/xen/arch/x86/efi/runtime.c
+++ b/xen/arch/x86/efi/runtime.c
@@ -37,6 +37,8 @@ struct efi __read_mostly efi = {
l4_pgentry_t *__read_mostly efi_l4_pgtable;
+const struct efi_pci_rom *__read_mostly efi_pci_roms;
+
unsigned long efi_rs_enter(void)
{
unsigned long cr3 = read_cr3();
@@ -177,6 +179,29 @@ int efi_get_info(uint32_t idx, union xen
}
}
return -ESRCH;
+ case XEN_FW_EFI_PCI_ROM: {
+ const struct efi_pci_rom *ent;
+
+ for ( ent = efi_pci_roms; ent; ent = ent->next )
+ if ( info->pci_rom.segment == ent->segment &&
+ info->pci_rom.bus == ent->bus &&
+ info->pci_rom.devfn == ent->devfn &&
+ info->pci_rom.vendor == ent->vendor &&
+ info->pci_rom.devid == ent->devid )
+ {
+ int rc = 0;
+
+ if ( info->pci_rom.size < ent->size )
+ rc = -ENOSPC;
+ else if ( copy_to_guest(info->pci_rom.data,
+ ent->data, ent->size) )
+ rc = -EFAULT;
+ info->pci_rom.size = ent->size;
+
+ return rc;
+ }
+ return -ESRCH;
+ }
default:
return -EINVAL;
}
--- /dev/null
+++ b/xen/include/efi/efipciio.h
@@ -0,0 +1,219 @@
+#ifndef _EFI_PCI_IO_H
+#define _EFI_PCI_IO_H
+
+#define EFI_PCI_IO_PROTOCOL \
+ { 0x4cf5b200, 0x68b8, 0x4ca5, {0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02,
0x9a} }
+
+INTERFACE_DECL(_EFI_PCI_IO);
+
+typedef enum {
+ EfiPciIoWidthUint8,
+ EfiPciIoWidthUint16,
+ EfiPciIoWidthUint32,
+ EfiPciIoWidthUint64,
+ EfiPciIoWidthFifoUint8,
+ EfiPciIoWidthFifoUint16,
+ EfiPciIoWidthFifoUint32,
+ EfiPciIoWidthFifoUint64,
+ EfiPciIoWidthFillUint8,
+ EfiPciIoWidthFillUint16,
+ EfiPciIoWidthFillUint32,
+ EfiPciIoWidthFillUint64,
+ EfiPciIoWidthMaximum
+} EFI_PCI_IO_PROTOCOL_WIDTH;
+
+#define EFI_PCI_IO_PASS_THROUGH_BAR 0xff
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_POLL_IO_MEM) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_PCI_IO_PROTOCOL_WIDTH Width,
+ IN UINT8 BarIndex,
+ IN UINT64 Offset,
+ IN UINT64 Mask,
+ IN UINT64 Value,
+ IN UINT64 Delay,
+ OUT UINT64 *Result
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_IO_MEM) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_PCI_IO_PROTOCOL_WIDTH Width,
+ IN UINT8 BarIndex,
+ IN UINT64 Offset,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+);
+
+typedef struct {
+ EFI_PCI_IO_PROTOCOL_IO_MEM Read;
+ EFI_PCI_IO_PROTOCOL_IO_MEM Write;
+} EFI_PCI_IO_PROTOCOL_ACCESS;
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_CONFIG) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_PCI_IO_PROTOCOL_WIDTH Width,
+ IN UINT32 Offset,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+);
+
+typedef struct {
+ EFI_PCI_IO_PROTOCOL_CONFIG Read;
+ EFI_PCI_IO_PROTOCOL_CONFIG Write;
+} EFI_PCI_IO_PROTOCOL_CONFIG_ACCESS;
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_COPY_MEM) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_PCI_IO_PROTOCOL_WIDTH Width,
+ IN UINT8 DestBarIndex,
+ IN UINT64 DestOffset,
+ IN UINT8 SrcBarIndex,
+ IN UINT64 SrcOffset,
+ IN UINTN Count
+ );
+
+typedef enum {
+ EfiPciIoOperationBusMasterRead,
+ EfiPciIoOperationBusMasterWrite,
+ EfiPciIoOperationBusMasterCommonBuffer,
+ EfiPciIoOperationMaximum
+} EFI_PCI_IO_PROTOCOL_OPERATION;
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_MAP) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_PCI_IO_PROTOCOL_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_UNMAP) (
+ IN struct _EFI_PCI_IO *This,
+ IN VOID *Mapping
+);
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_ALLOCATE_BUFFER) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_ALLOCATE_TYPE Type,
+ IN EFI_MEMORY_TYPE MemoryType,
+ IN UINTN Pages,
+ OUT VOID **HostAddress,
+ IN UINT64 Attributes
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_FREE_BUFFER) (
+ IN struct _EFI_PCI_IO *This,
+ IN UINTN Pages,
+ IN VOID *HostAddress
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_FLUSH) (
+ IN struct _EFI_PCI_IO *This
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_GET_LOCATION) (
+ IN struct _EFI_PCI_IO *This,
+ OUT UINTN *SegmentNumber,
+ OUT UINTN *BusNumber,
+ OUT UINTN *DeviceNumber,
+ OUT UINTN *FunctionNumber
+ );
+
+#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
+#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
+#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
+#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
+#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
+#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
+#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
+#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
+#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
+#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
+#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
+#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
+#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
+#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
+#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
+#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
+#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
+#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
+
+typedef enum {
+ EfiPciIoAttributeOperationGet,
+ EfiPciIoAttributeOperationSet,
+ EfiPciIoAttributeOperationEnable,
+ EfiPciIoAttributeOperationDisable,
+ EfiPciIoAttributeOperationSupported,
+ EfiPciIoAttributeOperationMaximum
+} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_ATTRIBUTES) (
+ IN struct _EFI_PCI_IO *This,
+ IN EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION Operation,
+ IN UINT64 Attributes,
+ OUT UINT64 *Result OPTIONAL
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_GET_BAR_ATTRIBUTES) (
+ IN struct _EFI_PCI_IO *This,
+ IN UINT8 BarIndex,
+ OUT UINT64 *Supports OPTIONAL,
+ OUT VOID **Resources OPTIONAL
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PCI_IO_PROTOCOL_SET_BAR_ATTRIBUTES) (
+ IN struct _EFI_PCI_IO *This,
+ IN UINT64 Attributes,
+ IN UINT8 BarIndex,
+ IN OUT UINT64 *Offset,
+ IN OUT UINT64 *Length
+ );
+
+typedef struct _EFI_PCI_IO {
+ EFI_PCI_IO_PROTOCOL_POLL_IO_MEM PollMem;
+ EFI_PCI_IO_PROTOCOL_POLL_IO_MEM PollIo;
+ EFI_PCI_IO_PROTOCOL_ACCESS Mem;
+ EFI_PCI_IO_PROTOCOL_ACCESS Io;
+ EFI_PCI_IO_PROTOCOL_CONFIG_ACCESS Pci;
+ EFI_PCI_IO_PROTOCOL_COPY_MEM CopyMem;
+ EFI_PCI_IO_PROTOCOL_MAP Map;
+ EFI_PCI_IO_PROTOCOL_UNMAP Unmap;
+ EFI_PCI_IO_PROTOCOL_ALLOCATE_BUFFER AllocateBuffer;
+ EFI_PCI_IO_PROTOCOL_FREE_BUFFER FreeBuffer;
+ EFI_PCI_IO_PROTOCOL_FLUSH Flush;
+ EFI_PCI_IO_PROTOCOL_GET_LOCATION GetLocation;
+ EFI_PCI_IO_PROTOCOL_ATTRIBUTES Attributes;
+ EFI_PCI_IO_PROTOCOL_GET_BAR_ATTRIBUTES GetBarAttributes;
+ EFI_PCI_IO_PROTOCOL_SET_BAR_ATTRIBUTES SetBarAttributes;
+ UINT64 RomSize;
+ VOID *RomImage;
+} EFI_PCI_IO;
+
+#endif /* _EFI_PCI_IO_H */
--- a/xen/include/public/platform.h
+++ b/xen/include/public/platform.h
@@ -218,6 +218,7 @@ DEFINE_XEN_GUEST_HANDLE(xenpf_efi_runtim
#define XEN_FW_EFI_VENDOR 2
#define XEN_FW_EFI_MEM_INFO 3
#define XEN_FW_EFI_RT_VERSION 4
+#define XEN_FW_EFI_PCI_ROM 5
#define XEN_FW_KBD_SHIFT_FLAGS 5
struct xenpf_firmware_info {
/* IN variables. */
@@ -266,6 +267,17 @@ struct xenpf_firmware_info {
uint64_t attr;
uint32_t type;
} mem;
+ struct {
+ /* IN variables */
+ uint16_t segment;
+ uint8_t bus;
+ uint8_t devfn;
+ uint16_t vendor;
+ uint16_t devid;
+ /* IN/OUT variables */
+ xen_ulong_t size;
+ XEN_GUEST_HANDLE(void) data;
+ } pci_rom;
} efi_info; /* XEN_FW_EFI_INFO */
/* Int16, Fn02: Get keyboard shift flags. */
Attachment:
x86-EFI-PCI-ROMs.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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