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OvmfPkg: Introduce PcdXenGrantFrames 

Introduce PcdXenGrantFrames to replace a define in XenBusDxe and allow
the same value to be used in a different module.

The reason for the number of page to be 4 doesn't exist anymore, so
simply remove the comment.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190813113119.14804-33-anthony.perard@citrix.com>
This commit is contained in:
Anthony PERARD 2019-08-13 12:31:16 +01:00 committed by Laszlo Ersek
parent 05480e2fd4
commit 8f39d79d65
4 changed files with 8 additions and 2 deletions
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3
OvmfPkg/OvmfPkg.dec
View File

@ -225,6 +225,9 @@
gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtr|0x0|UINT32|0x17
gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtrSize|0x0|UINT32|0x32
## Number of page frames to use for storing grant table entries.
gUefiOvmfPkgTokenSpaceGuid.PcdXenGrantFrames|4|UINT32|0x33
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashVariablesEnable|FALSE|BOOLEAN|0x10

3
OvmfPkg/XenBusDxe/GrantTable.c
View File

@ -22,8 +22,7 @@
#define NR_RESERVED_ENTRIES 8
/* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */
#define NR_GRANT_FRAMES 4
#define NR_GRANT_FRAMES (FixedPcdGet32 (PcdXenGrantFrames))
#define NR_GRANT_ENTRIES (NR_GRANT_FRAMES * EFI_PAGE_SIZE / sizeof(grant_entry_v1_t))
STATIC grant_entry_v1_t *GrantTable = NULL;

1
OvmfPkg/XenBusDxe/XenBusDxe.h
View File

@ -22,6 +22,7 @@
#include <Library/UefiLib.h>
#include <Library/DevicePathLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
//

3
OvmfPkg/XenBusDxe/XenBusDxe.inf
View File

@ -51,6 +51,7 @@
XenHypercallLib
SynchronizationLib
PrintLib
PcdLib
[Protocols]
gEfiDriverBindingProtocolGuid
@ -59,3 +60,5 @@
gXenBusProtocolGuid
gXenIoProtocolGuid
[FixedPcd]
gUefiOvmfPkgTokenSpaceGuid.PcdXenGrantFrames