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| author | Varun Sethi <Varun.Sethi@freescale.com> | 2013-05-03 20:08:50 (GMT) |
|---|---|---|
| committer | Fleming Andrew-AFLEMING <AFLEMING@freescale.com> | 2013-05-07 21:32:51 (GMT) |
| commit | a0c1ad437f79ce8833333cbc422c884db9707bf0 (patch) | |
| tree | 6a00c4c100314ad9d1acfcfa342705f331b44212 /arch/powerpc/sysdev/fsl_pci.h | |
| parent | d20686edbd934e76bab1787ca584691fbd1354c7 (diff) | |
| download | linux-fsl-qoriq-a0c1ad437f79ce8833333cbc422c884db9707bf0.tar.xz | |
Check of qemu emulated PCI controller.
While implementing direct device assignment for linux guest using identity
mapped memory (1:1 guest to host physical mapping), we hit a case
where guest end of memory is not a power of two and thus is not
completely mapped by the PCI controller inbound window.
For a similar condition if the PCI controller supports PCI express
capability the fsl_pci driver allows for over commit of inbound
memory window.
In this patch we introduce a check to see if the PCI controller is a
qemu emulated controller. If it's an emulated controller we allow
the inbound memory over commit in the fsl_pci driver.
Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Change-Id: I6dd7e5fb960a2ec068dd4f01c51906a7a1dea1f7
Reviewed-on: http://git.am.freescale.net:8181/2357
Reviewed-by: Wood Scott-B07421 <scottwood@freescale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Diffstat (limited to 'arch/powerpc/sysdev/fsl_pci.h')
| -rw-r--r-- | arch/powerpc/sysdev/fsl_pci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.h b/arch/powerpc/sysdev/fsl_pci.h index a288369..c95738b 100644 --- a/arch/powerpc/sysdev/fsl_pci.h +++ b/arch/powerpc/sysdev/fsl_pci.h @@ -150,6 +150,8 @@ u64 fsl_pci_immrbar_base(struct pci_controller *hose); extern struct device_node *fsl_pci_primary; +extern unsigned int qemu_e500_pci; + #ifdef CONFIG_PCI void fsl_pci_assign_primary(void); #else |