From: Ian Munsie Date: Wed, 14 Nov 2012 18:49:44 +0000 (+0000) Subject: powerpc: Define differences between doorbells on book3e and book3s X-Git-Tag: v3.9-rc1~100^2~95 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=42d02b81f265b77be39262666c888d50cb488fc5;p=pandora-kernel.git powerpc: Define differences between doorbells on book3e and book3s There are a few key differences between doorbells on server compared with embedded that we care about on Linux, namely: - We have a new msgsndp instruction for directed privileged doorbells. msgsnd is used for directed hypervisor doorbells. - The tag we use in the instruction is the Thread Identification Register of the recipient thread (since server doorbells can only occur between threads within a single core), and is only 7 bits wide. - A new message type is introduced for server doorbells (none of the existing book3e message types are currently supported on book3s). Signed-off-by: Ian Munsie Tested-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt --- Reading git-diff-tree failed