aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/pseries/setup.c
diff options
context:
space:
mode:
authorBrian King <brking@linux.vnet.ibm.com>2011-05-04 16:01:20 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-04 16:02:21 +1000
commit9ee820fa005254dfc816330f6654f14dcb2beee1 (patch)
tree1d36b17ec6a4c56dd24f9be2f7f31e6321040ed0 /arch/powerpc/platforms/pseries/setup.c
parent7707e4110e5692fe85e7e6c471c9bb2a9254d313 (diff)
downloadlinaro-lsk-9ee820fa005254dfc816330f6654f14dcb2beee1.tar.gz
powerpc/pseries: Add page coalescing support
Adds support for page coalescing, which is a feature on IBM Power servers which allows for coalescing identical pages between logical partitions. Hint text pages as coalesce candidates, since they are the most likely pages to be able to be coalesced between partitions. This patch also exports some page coalescing statistics available from firmware via lparcfg. [BenH: Moved a couple of things around to fix compile problems] Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/setup.c')
-rw-r--r--arch/powerpc/platforms/pseries/setup.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index ab73ad2ff59..1689adccc6d 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -405,6 +405,16 @@ static int pseries_set_xdabr(unsigned long dabr)
#define CMO_CHARACTERISTICS_TOKEN 44
#define CMO_MAXLENGTH 1026
+void pSeries_coalesce_init(void)
+{
+ struct hvcall_mpp_x_data mpp_x_data;
+
+ if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
+ powerpc_firmware_features |= FW_FEATURE_XCMO;
+ else
+ powerpc_firmware_features &= ~FW_FEATURE_XCMO;
+}
+
/**
* fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
* handle that here. (Stolen from parse_system_parameter_string)
@@ -474,6 +484,7 @@ void pSeries_cmo_feature_init(void)
pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
CMO_SecPSP);
powerpc_firmware_features |= FW_FEATURE_CMO;
+ pSeries_coalesce_init();
} else
pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
CMO_SecPSP);