diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2019-12-16 15:19:23 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-01-06 16:25:30 +1100 |
| commit | 17a0364cb07c173f64cefe973a93b8dbd9c61795 (patch) | |
| tree | 446be1476fe2c87a9239027891ccd96c11331743 /arch/powerpc/include | |
| parent | 7559d3d295f3365ea7ac0c0274c05e633fe4f594 (diff) | |
powerpc/pseries/iommu: Separate FW_FEATURE_MULTITCE to put/stuff features
H_PUT_TCE_INDIRECT allows packing up to 512 TCE updates into a single
hypercall; H_STUFF_TCE can clear lots in a single hypercall too.
However, unlike H_STUFF_TCE (which writes the same TCE to all entries),
H_PUT_TCE_INDIRECT uses a 4K page with new TCEs. In a secure VM
environment this means sharing a secure VM page with a hypervisor which
we would rather avoid.
This splits the FW_FEATURE_MULTITCE feature into FW_FEATURE_PUT_TCE_IND
and FW_FEATURE_STUFF_TCE. "hcall-multi-tce" in
the "/rtas/ibm,hypertas-functions" device tree property sets both;
the "multitce=off" kernel command line parameter disables both.
This should not cause behavioural change.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Tested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191216041924.42318-4-aik@ozlabs.ru
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/firmware.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h index b3e214a97f3a..ca33f4ef6cb4 100644 --- a/arch/powerpc/include/asm/firmware.h +++ b/arch/powerpc/include/asm/firmware.h @@ -33,7 +33,7 @@ #define FW_FEATURE_LLAN ASM_CONST(0x0000000000010000) #define FW_FEATURE_BULK_REMOVE ASM_CONST(0x0000000000020000) #define FW_FEATURE_XDABR ASM_CONST(0x0000000000040000) -#define FW_FEATURE_MULTITCE ASM_CONST(0x0000000000080000) +#define FW_FEATURE_PUT_TCE_IND ASM_CONST(0x0000000000080000) #define FW_FEATURE_SPLPAR ASM_CONST(0x0000000000100000) #define FW_FEATURE_LPAR ASM_CONST(0x0000000000400000) #define FW_FEATURE_PS3_LV1 ASM_CONST(0x0000000000800000) @@ -51,6 +51,7 @@ #define FW_FEATURE_BLOCK_REMOVE ASM_CONST(0x0000001000000000) #define FW_FEATURE_PAPR_SCM ASM_CONST(0x0000002000000000) #define FW_FEATURE_ULTRAVISOR ASM_CONST(0x0000004000000000) +#define FW_FEATURE_STUFF_TCE ASM_CONST(0x0000008000000000) #ifndef __ASSEMBLY__ @@ -63,7 +64,8 @@ enum { FW_FEATURE_MIGRATE | FW_FEATURE_PERFMON | FW_FEATURE_CRQ | FW_FEATURE_VIO | FW_FEATURE_RDMA | FW_FEATURE_LLAN | FW_FEATURE_BULK_REMOVE | FW_FEATURE_XDABR | - FW_FEATURE_MULTITCE | FW_FEATURE_SPLPAR | FW_FEATURE_LPAR | + FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE | + FW_FEATURE_SPLPAR | FW_FEATURE_LPAR | FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO | FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY | FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN | |