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OvmfPkg: AcpiPlatformDxe: remove current ACPI table loader 

In the next patch we rewrite the client code for QEMU's fw_cfg ACPI table
loader interface. In order to avoid randomly intermixed hunks in that
patch, first remove the old code cleanly.

We remove the InstallQemuLinkedTables() function and empty the
InstallAllQemuLinkedTables() function. We also remove CheckRsdp().

InstallAllQemuLinkedTables() will return constant EFI_NOT_FOUND to
AcpiPlatformEntryPoint(), causing the latter to proceed to OVMF's builtin
tables.

This way the history remains bisectable and the new client gets a clean
start in the next patch.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16157 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2014-09-22 21:11:15 +00:00 committed by lersek
parent 10de33ec2d
commit 56947bc081
1 changed files with 1 additions and 337 deletions
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338
OvmfPkg/AcpiPlatformDxe/Qemu.c
View File

@ -517,272 +517,6 @@ QemuInstallAcpiTable (
}
/**
Check if an array of bytes starts with an RSD PTR structure.
Checksum is ignored.
@param[in] Buffer The array to check.
@param[in] Size Number of bytes in Buffer.
@param[out] RsdpSize If the function returns EFI_SUCCESS, this parameter
contains the size of the detected RSD PTR structure.
@retval EFI_SUCCESS RSD PTR structure detected at the beginning of
Buffer, and its advertised size does not exceed
Size.
@retval EFI_PROTOCOL_ERROR RSD PTR structure detected at the beginning of
Buffer, but it has inconsistent size.
@retval EFI_NOT_FOUND RSD PTR structure not found.
**/
STATIC
EFI_STATUS
CheckRsdp (
IN CONST VOID *Buffer,
IN UINTN Size,
OUT UINTN *RsdpSize
)
{
CONST UINT64 *Signature;
CONST EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER *Rsdp1;
CONST EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *Rsdp2;
if (Size < sizeof *Signature) {
return EFI_NOT_FOUND;
}
Signature = Buffer;
if (*Signature != EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER_SIGNATURE) {
return EFI_NOT_FOUND;
}
//
// Signature found -- from this point on we can only report
// EFI_PROTOCOL_ERROR or EFI_SUCCESS.
//
if (Size < sizeof *Rsdp1) {
return EFI_PROTOCOL_ERROR;
}
Rsdp1 = Buffer;
if (Rsdp1->Reserved == 0) {
//
// ACPI 1.0 doesn't include the Length field
//
*RsdpSize = sizeof *Rsdp1;
return EFI_SUCCESS;
}
if (Size < sizeof *Rsdp2) {
return EFI_PROTOCOL_ERROR;
}
Rsdp2 = Buffer;
if (Size < Rsdp2->Length || Rsdp2->Length < sizeof *Rsdp2) {
return EFI_PROTOCOL_ERROR;
}
*RsdpSize = Rsdp2->Length;
return EFI_SUCCESS;
}
//
// We'll be saving the keys of installed tables so that we can roll them back
// in case of failure. 128 tables should be enough for anyone (TM).
//
#define INSTALLED_TABLES_MAX 128
/**
Download one ACPI table data file from QEMU and interpret it.
@param[in] FwCfgFile The NUL-terminated name of the fw_cfg file to
download and interpret.
@param[in] AcpiProtocol The ACPI table protocol used to install tables.
@param[in,out] InstalledKey On input, an array of INSTALLED_TABLES_MAX UINTN
elements, allocated by the caller. On output,
the function will have stored (appended) the
AcpiProtocol-internal keys of the ACPI tables
that the function has installed from the fw_cfg
file. The array reflects installed tables even
if the function returns with an error.
@param[in,out] NumInstalled On input, the number of entries already used in
InstalledKey; it must be in [0,
INSTALLED_TABLES_MAX] inclusive. On output, the
parameter is updated to the new cumulative count
of the keys stored in InstalledKey; the value
reflects installed tables even if the function
returns with an error.
@retval EFI_INVALID_PARAMETER NumInstalled is outside the allowed range on
input.
@retval EFI_UNSUPPORTED Firmware configuration is unavailable.
@retval EFI_NOT_FOUND The host doesn't export the requested fw_cfg
file.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed, or no more room in
InstalledKey.
@retval EFI_PROTOCOL_ERROR Found truncated or invalid ACPI table header
in the fw_cfg contents.
@return Status codes returned by
AcpiProtocol->InstallAcpiTable().
**/
STATIC
EFI_STATUS
InstallQemuLinkedTables (
IN CONST CHAR8 *FwCfgFile,
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
IN OUT UINTN InstalledKey[INSTALLED_TABLES_MAX],
IN OUT INT32 *NumInstalled
)
{
EFI_STATUS Status;
FIRMWARE_CONFIG_ITEM TablesFile;
UINTN TablesFileSize;
UINT8 *Tables;
UINTN Processed;
if (*NumInstalled < 0 || *NumInstalled > INSTALLED_TABLES_MAX) {
return EFI_INVALID_PARAMETER;
}
Status = QemuFwCfgFindFile (FwCfgFile, &TablesFile, &TablesFileSize);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a: \"%a\" unavailable: %r\n", __FUNCTION__,
FwCfgFile, Status));
return Status;
}
Tables = AllocatePool (TablesFileSize);
if (Tables == NULL) {
return EFI_OUT_OF_RESOURCES;
}
QemuFwCfgSelectItem (TablesFile);
QemuFwCfgReadBytes (TablesFileSize, Tables);
Processed = 0;
while (Processed < TablesFileSize) {
UINTN Remaining;
UINTN RsdpSize;
EFI_ACPI_DESCRIPTION_HEADER *Probe;
Remaining = TablesFileSize - Processed;
//
// See if we're looking at an RSD PTR structure.
//
RsdpSize = 0;
Status = CheckRsdp (Tables + Processed, Remaining, &RsdpSize);
if (Status == EFI_PROTOCOL_ERROR) {
//
// RSD PTR found but its size is inconsistent; abort processing. (Note
// that "RSD PTR found" excludes the NUL-padding case by definition.)
//
break;
}
if (!EFI_ERROR (Status)) {
//
// Consistent RSD PTR found, skip it.
//
DEBUG ((EFI_D_VERBOSE, "%a: \"%a\" offset 0x%016Lx: RSD PTR "
"Length=0x%08x\n", __FUNCTION__, FwCfgFile, (UINT64)Processed,
(UINT32)RsdpSize));
Processed += RsdpSize;
continue;
}
ASSERT (Status == EFI_NOT_FOUND);
//
// What we're looking at is not an RSD PTR structure; attempt to parse it
// as an ACPI table.
//
if (Remaining < sizeof *Probe) {
Status = EFI_PROTOCOL_ERROR;
break;
}
Probe = (EFI_ACPI_DESCRIPTION_HEADER *) (Tables + Processed);
if (Remaining < Probe->Length || Probe->Length < sizeof *Probe) {
Status = EFI_PROTOCOL_ERROR;
break;
}
DEBUG ((EFI_D_VERBOSE, "%a: \"%a\" offset 0x%016Lx:"
" Signature=\"%-4.4a\" Length=0x%08x\n",
__FUNCTION__, FwCfgFile, (UINT64) Processed,
(CONST CHAR8 *) &Probe->Signature, Probe->Length));
//
// skip automatically handled "root" tables: RSDT, XSDT
//
if (Probe->Signature !=
EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE &&
Probe->Signature !=
EFI_ACPI_2_0_EXTENDED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) {
if (*NumInstalled == INSTALLED_TABLES_MAX) {
DEBUG ((EFI_D_ERROR, "%a: can't install more than %d tables\n",
__FUNCTION__, INSTALLED_TABLES_MAX));
Status = EFI_OUT_OF_RESOURCES;
break;
}
Status = AcpiProtocol->InstallAcpiTable (AcpiProtocol, Probe,
Probe->Length, &InstalledKey[*NumInstalled]);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR,
"%a: failed to install table \"%-4.4a\" at \"%a\" offset 0x%Lx: "
"%r\n", __FUNCTION__, (CONST CHAR8 *)&Probe->Signature, FwCfgFile,
(UINT64) Processed, Status));
break;
}
++*NumInstalled;
}
Processed += Probe->Length;
}
//
// NUL-padding at the end is accepted
//
if (Status == EFI_PROTOCOL_ERROR) {
UINTN ErrorLocation;
ErrorLocation = Processed;
while (Processed < TablesFileSize && Tables[Processed] == '\0') {
++Processed;
}
if (Processed < TablesFileSize) {
DEBUG ((EFI_D_ERROR, "%a: truncated or invalid ACPI table header at "
"\"%a\" offset 0x%Lx\n", __FUNCTION__, FwCfgFile,
(UINT64)ErrorLocation));
}
}
if (Processed == TablesFileSize) {
Status = EFI_SUCCESS;
} else {
ASSERT (EFI_ERROR (Status));
}
FreePool (Tables);
return Status;
}
/**
Download all ACPI table data files from QEMU and interpret them.
@ -809,75 +543,5 @@ InstallAllQemuLinkedTables (
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
)
{
UINTN *InstalledKey;
INT32 Installed;
EFI_STATUS Status;
FIRMWARE_CONFIG_ITEM LoaderItem;
UINTN LoaderSize;
UINT8 *Loader;
QEMU_LOADER_ENTRY *Entry, *End;
InstalledKey = AllocatePool (INSTALLED_TABLES_MAX * sizeof *InstalledKey);
if (InstalledKey == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Installed = 0;
Status = QemuFwCfgFindFile ("etc/table-loader", &LoaderItem, &LoaderSize);
if (EFI_ERROR (Status)) {
goto FreeInstalledKey;
}
if (LoaderSize % sizeof *Entry != 0) {
Status = EFI_PROTOCOL_ERROR;
goto FreeInstalledKey;
}
Loader = AllocatePool (LoaderSize);
if (Loader == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeInstalledKey;
}
QemuFwCfgSelectItem (LoaderItem);
QemuFwCfgReadBytes (LoaderSize, Loader);
Entry = (QEMU_LOADER_ENTRY *)Loader;
End = (QEMU_LOADER_ENTRY *)(Loader + LoaderSize);
while (Entry < End) {
if (Entry->Type == QemuLoaderCmdAllocate) {
QEMU_LOADER_ALLOCATE *Allocate;
Allocate = &Entry->Command.Allocate;
if (Allocate->File[sizeof Allocate->File - 1] != '\0') {
Status = EFI_PROTOCOL_ERROR;
break;
}
Status = InstallQemuLinkedTables ((CHAR8 *)Allocate->File, AcpiProtocol,
InstalledKey, &Installed);
if (EFI_ERROR (Status)) {
ASSERT (Status != EFI_INVALID_PARAMETER);
break;
}
}
++Entry;
}
FreePool (Loader);
if (EFI_ERROR (Status)) {
//
// Roll back partial installation.
//
while (Installed > 0) {
--Installed;
AcpiProtocol->UninstallAcpiTable (AcpiProtocol, InstalledKey[Installed]);
}
} else {
DEBUG ((EFI_D_INFO, "%a: installed %d tables\n", __FUNCTION__, Installed));
}
FreeInstalledKey:
FreePool (InstalledKey);
return Status;
return EFI_NOT_FOUND;
}