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authorNathan Fontenot <nfont@linux.vnet.ibm.com>2013-04-24 05:57:18 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-04-26 16:08:22 +1000
commitf0ff7eb483b4c9b24b83aa682c4f42db256f9bdb (patch)
treed1733adf54ac7c44fa5d2dbb7107e2133c3f2c45 /arch/powerpc
parent43c0ea60537d9423f0f1b5c14b0cd0a0b4af5c81 (diff)
powerpc/pseries: Update firmware_has_feature() to check architecture vector 5 bits
The firmware_has_feature() function makes it easy to check for supported features of the hypervisor. This patch extends the capability of firmware_has_feature() to include checking for specified bits in vector 5 of the architecture vector as reported in the device tree. As part of this the #defines used for the architecture vector are re-defined such that each option has the index into vector 5 and the feature bit encoded into it. This makes checking for architecture bits when initiating data for firmware_has_feature much easier. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/include/asm/firmware.h4
-rw-r--r--arch/powerpc/include/asm/prom.h45
-rw-r--r--arch/powerpc/kernel/prom_init.c23
-rw-r--r--arch/powerpc/platforms/pseries/firmware.c49
-rw-r--r--arch/powerpc/platforms/pseries/pseries.h5
-rw-r--r--arch/powerpc/platforms/pseries/setup.c40
6 files changed, 111 insertions, 55 deletions
diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
index f9651b288da..6e336e0978b 100644
--- a/arch/powerpc/include/asm/firmware.h
+++ b/arch/powerpc/include/asm/firmware.h
@@ -50,6 +50,7 @@
#define FW_FEATURE_OPALv2 ASM_CONST(0x0000000020000000)
#define FW_FEATURE_SET_MODE ASM_CONST(0x0000000040000000)
#define FW_FEATURE_BEST_ENERGY ASM_CONST(0x0000000080000000)
+#define FW_FEATURE_TYPE1_AFFINITY ASM_CONST(0x0000000100000000)
#ifndef __ASSEMBLY__
@@ -64,7 +65,8 @@ enum {
FW_FEATURE_BULK_REMOVE | FW_FEATURE_XDABR |
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_SET_MODE | FW_FEATURE_BEST_ENERGY |
+ FW_FEATURE_TYPE1_AFFINITY,
FW_FEATURE_PSERIES_ALWAYS = 0,
FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_OPALv2,
FW_FEATURE_POWERNV_ALWAYS = 0,
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index 811b7809905..2ea8b856d60 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -110,31 +110,28 @@ struct of_drconf_cell {
/* Option vector 4: IBM PAPR implementation */
#define OV4_MIN_ENT_CAP 0x01 /* minimum VP entitled capacity */
-/* Option vector 5: PAPR/OF options supported */
-#define OV5_LPAR 0x80 /* logical partitioning supported */
-#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
+/* Option vector 5: PAPR/OF options supported
+ * These bits are also used in firmware_has_feature() to validate
+ * the capabilities reported for vector 5 in the device tree so we
+ * encode the vector index in the define and use the OV5_FEAT()
+ * and OV5_INDX() macros to extract the desired information.
+ */
+#define OV5_FEAT(x) ((x) & 0xff)
+#define OV5_INDX(x) ((x) >> 8)
+#define OV5_LPAR 0x0280 /* logical partitioning supported */
+#define OV5_SPLPAR 0x0240 /* shared-processor LPAR supported */
/* ibm,dynamic-reconfiguration-memory property supported */
-#define OV5_DRCONF_MEMORY 0x20
-#define OV5_LARGE_PAGES 0x10 /* large pages supported */
-#define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
-/* PCIe/MSI support. Without MSI full PCIe is not supported */
-#ifdef CONFIG_PCI_MSI
-#define OV5_MSI 0x01 /* PCIe/MSI support */
-#else
-#define OV5_MSI 0x00
-#endif /* CONFIG_PCI_MSI */
-#ifdef CONFIG_PPC_SMLPAR
-#define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */
-#define OV5_XCMO 0x40 /* Page Coalescing */
-#else
-#define OV5_CMO 0x00
-#define OV5_XCMO 0x00
-#endif
-#define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */
-#define OV5_PFO_HW_RNG 0x80 /* PFO Random Number Generator */
-#define OV5_PFO_HW_842 0x40 /* PFO Compression Accelerator */
-#define OV5_PFO_HW_ENCR 0x20 /* PFO Encryption Accelerator */
-#define OV5_SUB_PROCESSORS 0x01 /* 1,2,or 4 Sub-Processors supported */
+#define OV5_DRCONF_MEMORY 0x0220
+#define OV5_LARGE_PAGES 0x0210 /* large pages supported */
+#define OV5_DONATE_DEDICATE_CPU 0x0202 /* donate dedicated CPU support */
+#define OV5_MSI 0x0201 /* PCIe/MSI support */
+#define OV5_CMO 0x0480 /* Cooperative Memory Overcommitment */
+#define OV5_XCMO 0x0440 /* Page Coalescing */
+#define OV5_TYPE1_AFFINITY 0x0580 /* Type 1 NUMA affinity */
+#define OV5_PFO_HW_RNG 0x0E80 /* PFO Random Number Generator */
+#define OV5_PFO_HW_842 0x0E40 /* PFO Compression Accelerator */
+#define OV5_PFO_HW_ENCR 0x0E20 /* PFO Encryption Accelerator */
+#define OV5_SUB_PROCESSORS 0x0F01 /* 1,2,or 4 Sub-Processors supported */
/* Option Vector 6: IBM PAPR hints */
#define OV6_LINUX 0x02 /* Linux is our OS */
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 4a9e50cf8ab..1b0000a247d 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -684,11 +684,21 @@ unsigned char ibm_architecture_vec[] = {
/* option vector 5: PAPR/OF options */
19 - 2, /* length */
0, /* don't ignore, don't halt */
- OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
- OV5_DONATE_DEDICATE_CPU | OV5_MSI,
+ OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
+ OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
+#ifdef CONFIG_PCI_MSI
+ /* PCIe/MSI support. Without MSI full PCIe is not supported */
+ OV5_FEAT(OV5_MSI),
+#else
+ 0,
+#endif
0,
- OV5_CMO | OV5_XCMO,
- OV5_TYPE1_AFFINITY,
+#ifdef CONFIG_PPC_SMLPAR
+ OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
+#else
+ 0,
+#endif
+ OV5_FEAT(OV5_TYPE1_AFFINITY),
0,
0,
0,
@@ -702,8 +712,9 @@ unsigned char ibm_architecture_vec[] = {
0,
0,
0,
- OV5_PFO_HW_RNG | OV5_PFO_HW_ENCR | OV5_PFO_HW_842,
- OV5_SUB_PROCESSORS,
+ OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) |
+ OV5_FEAT(OV5_PFO_HW_842),
+ OV5_FEAT(OV5_SUB_PROCESSORS),
/* option vector 6: IBM PAPR hints */
4 - 2, /* length */
0,
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 1236a9d6146..06639fa2d61 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -28,18 +28,18 @@
#include "pseries.h"
-typedef struct {
+struct hypertas_fw_feature {
unsigned long val;
char * name;
-} firmware_feature_t;
+};
/*
* The names in this table match names in rtas/ibm,hypertas-functions. If the
* entry ends in a '*', only upto the '*' is matched. Otherwise the entire
* string must match.
*/
-static __initdata firmware_feature_t
-firmware_features_table[] = {
+static __initdata struct hypertas_fw_feature
+hypertas_fw_features_table[] = {
{FW_FEATURE_PFT, "hcall-pft"},
{FW_FEATURE_TCE, "hcall-tce"},
{FW_FEATURE_SPRG0, "hcall-sprg0"},
@@ -69,16 +69,16 @@ firmware_features_table[] = {
* device-tree/ibm,hypertas-functions. Ultimately this functionality may
* be moved into prom.c prom_init().
*/
-void __init fw_feature_init(const char *hypertas, unsigned long len)
+void __init fw_hypertas_feature_init(const char *hypertas, unsigned long len)
{
const char *s;
int i;
- pr_debug(" -> fw_feature_init()\n");
+ pr_debug(" -> fw_hypertas_feature_init()\n");
for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
- for (i = 0; i < ARRAY_SIZE(firmware_features_table); i++) {
- const char *name = firmware_features_table[i].name;
+ for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) {
+ const char *name = hypertas_fw_features_table[i].name;
size_t size;
/*
@@ -94,10 +94,39 @@ void __init fw_feature_init(const char *hypertas, unsigned long len)
/* we have a match */
powerpc_firmware_features |=
- firmware_features_table[i].val;
+ hypertas_fw_features_table[i].val;
break;
}
}
- pr_debug(" <- fw_feature_init()\n");
+ pr_debug(" <- fw_hypertas_feature_init()\n");
+}
+
+struct vec5_fw_feature {
+ unsigned long val;
+ unsigned int feature;
+};
+
+static __initdata struct vec5_fw_feature
+vec5_fw_features_table[] = {
+ {FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY},
+};
+
+void __init fw_vec5_feature_init(const char *vec5, unsigned long len)
+{
+ unsigned int index, feat;
+ int i;
+
+ pr_debug(" -> fw_vec5_feature_init()\n");
+
+ for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) {
+ index = OV5_INDX(vec5_fw_features_table[i].feature);
+ feat = OV5_FEAT(vec5_fw_features_table[i].feature);
+
+ if (vec5[index] & feat)
+ powerpc_firmware_features |=
+ vec5_fw_features_table[i].val;
+ }
+
+ pr_debug(" <- fw_vec5_feature_init()\n");
}
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 9a3dda07566..8af71e4cc17 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -19,7 +19,10 @@ extern void request_event_sources_irqs(struct device_node *np,
#include <linux/of.h>
-extern void __init fw_feature_init(const char *hypertas, unsigned long len);
+extern void __init fw_hypertas_feature_init(const char *hypertas,
+ unsigned long len);
+extern void __init fw_vec5_feature_init(const char *hypertas,
+ unsigned long len);
struct pt_regs;
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 8bcc9ca6682..ac932a9eb44 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -628,25 +628,39 @@ static void __init pSeries_init_early(void)
* Called very early, MMU is off, device-tree isn't unflattened
*/
-static int __init pSeries_probe_hypertas(unsigned long node,
- const char *uname, int depth,
- void *data)
+static int __init pseries_probe_fw_features(unsigned long node,
+ const char *uname, int depth,
+ void *data)
{
- const char *hypertas;
+ const char *prop;
unsigned long len;
+ static int hypertas_found;
+ static int vec5_found;
- if (depth != 1 ||
- (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0))
+ if (depth != 1)
return 0;
- hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len);
- if (!hypertas)
- return 1;
+ if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) {
+ prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions",
+ &len);
+ if (prop) {
+ powerpc_firmware_features |= FW_FEATURE_LPAR;
+ fw_hypertas_feature_init(prop, len);
+ }
- powerpc_firmware_features |= FW_FEATURE_LPAR;
- fw_feature_init(hypertas, len);
+ hypertas_found = 1;
+ }
- return 1;
+ if (!strcmp(uname, "chosen")) {
+ prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5",
+ &len);
+ if (prop)
+ fw_vec5_feature_init(prop, len);
+
+ vec5_found = 1;
+ }
+
+ return hypertas_found && vec5_found;
}
static int __init pSeries_probe(void)
@@ -669,7 +683,7 @@ static int __init pSeries_probe(void)
pr_debug("pSeries detected, looking for LPAR capability...\n");
/* Now try to figure out if we are running on LPAR */
- of_scan_flat_dt(pSeries_probe_hypertas, NULL);
+ of_scan_flat_dt(pseries_probe_fw_features, NULL);
if (firmware_has_feature(FW_FEATURE_LPAR))
hpte_init_lpar();