From: Paul Mackerras Date: Sat, 19 Jul 2014 07:59:36 +0000 (+1000) Subject: KVM: PPC: Book3S: Make kvmppc_ld return a more accurate error indication X-Git-Tag: cleanup-for-v3.18~89^2~10^2~17 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b2e33b071b13980a1f0823fbf139242059697b4;p=pandora-kernel.git KVM: PPC: Book3S: Make kvmppc_ld return a more accurate error indication At present, kvmppc_ld calls kvmppc_xlate, and if kvmppc_xlate returns any error indication, it returns -ENOENT, which is taken to mean an HPTE not found error. However, the error could have been a segment found (no SLB entry) or a permission error. Similarly, kvmppc_pte_to_hva currently does permission checking, but any error from it is taken by kvmppc_ld to mean that the access is an emulated MMIO access. Also, kvmppc_ld does no execute permission checking. This fixes these problems by (a) returning any error from kvmppc_xlate directly, (b) moving the permission check from kvmppc_pte_to_hva into kvmppc_ld, and (c) adding an execute permission check to kvmppc_ld. This is similar to what was done for kvmppc_st() by commit 82ff911317c3 ("KVM: PPC: Deflect page write faults properly in kvmppc_st"). Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- Reading git-diff-tree failed