powerpc/pseries: Add hypercall wrappers for hash page table resizing

This adds the hypercall numbers and wrapper functions for the hash page
table resizing hypercalls.

These hypercall numbers are defined in the PAPR ACR "HPT resizing
option".

It also adds a new firmware feature flag to track the presence of the
HPT resizing calls.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
index 1e0b5a5..8645897 100644 (file)
--- a/arch/powerpc/include/asm/firmware.h
+++ b/arch/powerpc/include/asm/firmware.h
@@ -42,7 +42,7 @@
 #define FW_FEATURE_SPLPAR      ASM_CONST(0x0000000000100000)
 #define FW_FEATURE_LPAR                ASM_CONST(0x0000000000400000)
 #define FW_FEATURE_PS3_LV1     ASM_CONST(0x0000000000800000)
-/* Free                                ASM_CONST(0x0000000001000000) */
+#define FW_FEATURE_HPT_RESIZE  ASM_CONST(0x0000000001000000)
 #define FW_FEATURE_CMO         ASM_CONST(0x0000000002000000)
 #define FW_FEATURE_VPHN                ASM_CONST(0x0000000004000000)
 #define FW_FEATURE_XCMO                ASM_CONST(0x0000000008000000)
@@ -66,7 +66,8 @@ enum {
                FW_FEATURE_MULTITCE | 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,
+               FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
+               FW_FEATURE_HPT_RESIZE,
        FW_FEATURE_PSERIES_ALWAYS = 0,
        FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
        FW_FEATURE_POWERNV_ALWAYS = 0,

diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index 77ff1ba..490c4b9 100644 (file)
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -276,6 +276,8 @@
 #define H_GET_MPP_X            0x314
 #define H_SET_MODE             0x31C
 #define H_CLEAR_HPT            0x358
+#define H_RESIZE_HPT_PREPARE   0x36C
+#define H_RESIZE_HPT_COMMIT    0x370
 #define H_SIGNAL_SYS_RESET     0x380
 #define MAX_HCALL_OPCODE       H_SIGNAL_SYS_RESET
 

diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h
index 0bcc75e..c7b1648 100644 (file)
--- a/arch/powerpc/include/asm/plpar_wrappers.h
+++ b/arch/powerpc/include/asm/plpar_wrappers.h
@@ -210,6 +210,18 @@ static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
        return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
 }
 
+static inline long plpar_resize_hpt_prepare(unsigned long flags,
+                                           unsigned long shift)
+{
+       return plpar_hcall_norets(H_RESIZE_HPT_PREPARE, flags, shift);
+}
+
+static inline long plpar_resize_hpt_commit(unsigned long flags,
+                                          unsigned long shift)
+{
+       return plpar_hcall_norets(H_RESIZE_HPT_COMMIT, flags, shift);
+}
+
 static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
                unsigned long *tce_ret)
 {

diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index ea7f09b..658c02d 100644 (file)
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -64,6 +64,7 @@ hypertas_fw_features_table[] = {
        {FW_FEATURE_VPHN,               "hcall-vphn"},
        {FW_FEATURE_SET_MODE,           "hcall-set-mode"},
        {FW_FEATURE_BEST_ENERGY,        "hcall-best-energy-1*"},
+       {FW_FEATURE_HPT_RESIZE,         "hcall-hpt-resize"},
 };
 
 /* Build up the firmware features bitmask using the contents of