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| author | Suraj Jitindar Singh <sjitindarsingh@gmail.com> | 2017-04-13 16:02:36 +1000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2017-04-26 12:41:56 +1000 |
| commit | 31b2b0f8463533c32b5ad76e73668e2e9fca8ae2 (patch) | |
| tree | e39b281fda73aaf3999bad82aa820393964d84ee /target/ppc/helper.h | |
| parent | 8f37e54e5b9960151dfb16183fc1c530a0674c77 (diff) | |
| download | qemu-31b2b0f8463533c32b5ad76e73668e2e9fca8ae2.zip qemu-31b2b0f8463533c32b5ad76e73668e2e9fca8ae2.tar.gz qemu-31b2b0f8463533c32b5ad76e73668e2e9fca8ae2.tar.bz2 | |
target/ppc: Flush TLB on write to PIDR
The PIDR (process id register) is used to store the id of the currently
running process, which is used to select the process table entry used to
perform address translation. This means that when we write to this register
all the translations in the TLB become outdated as they are for a
previously running process. Thus when this register is written to we need
to invalidate the TLB entries to ensure stale entries aren't used to
to perform translation for the new process, which would result in at best
segfaults or alternatively just random memory being accessed.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
[dwg: Fixed compile error for 32-bit targets]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc/helper.h')
| -rw-r--r-- | target/ppc/helper.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target/ppc/helper.h b/target/ppc/helper.h index 6d77661..bb6a94a 100644 --- a/target/ppc/helper.h +++ b/target/ppc/helper.h @@ -709,6 +709,7 @@ DEF_HELPER_FLAGS_1(load_601_rtcu, TCG_CALL_NO_RWG, tl, env) DEF_HELPER_FLAGS_1(load_purr, TCG_CALL_NO_RWG, tl, env) #endif DEF_HELPER_2(store_sdr1, void, env, tl) +DEF_HELPER_2(store_pidr, void, env, tl) DEF_HELPER_FLAGS_2(store_tbl, TCG_CALL_NO_RWG, void, env, tl) DEF_HELPER_FLAGS_2(store_tbu, TCG_CALL_NO_RWG, void, env, tl) DEF_HELPER_FLAGS_2(store_atbl, TCG_CALL_NO_RWG, void, env, tl) |