diff options
| author | Vladimir Svoboda <ze.vlad@gmail.com> | 2016-11-17 14:49:48 +0100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-11-23 12:00:48 +1100 |
| commit | 0d28aa197dd91d1bd3bc1bdc46b0eca306460040 (patch) | |
| tree | f3a7c751267348709c42e4a89e80a3485e489bff /target-ppc/helper_regs.h | |
| parent | 62ef3760d4e400849fc663474227bb4668244455 (diff) | |
ppc: BOOK3E: nothing should be done when MSR:PR is set
The server architecture (BOOK3S) specifies that any instruction that
sets MSR:PR will also set MSR:EE, IR and DR.
However there is no such behavior specification for the embedded
architecture (BOOK3E).
Signed-off-by: Vladimir Svoboda <ze.vlad@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'target-ppc/helper_regs.h')
| -rw-r--r-- | target-ppc/helper_regs.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/target-ppc/helper_regs.h b/target-ppc/helper_regs.h index bb9ce60436..62138163a5 100644 --- a/target-ppc/helper_regs.h +++ b/target-ppc/helper_regs.h @@ -131,11 +131,14 @@ static inline int hreg_store_msr(CPUPPCState *env, target_ulong value, } /* If PR=1 then EE, IR and DR must be 1 * - * Note: We only enforce this on 64-bit processors. It appears that - * 32-bit implementations supports PR=1 and EE/DR/IR=0 and MacOS - * exploits it. + * Note: We only enforce this on 64-bit server processors. + * It appears that: + * - 32-bit implementations supports PR=1 and EE/DR/IR=0 and MacOS + * exploits it. + * - 64-bit embedded implementations do not need any operation to be + * performed when PR is set. */ - if ((env->insns_flags & PPC_64B) && ((value >> MSR_PR) & 1)) { + if ((env->insns_flags & PPC_SEGMENT_64B) && ((value >> MSR_PR) & 1)) { value |= (1 << MSR_EE) | (1 << MSR_DR) | (1 << MSR_IR); } #endif |