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target/arm: Add cpu properties to control pauth

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The crypto overhead of emulating pauth can be significant for
some workloads. Add two boolean properties that allows the
feature to be turned off, on with the architected algorithm,
or on with an implementation defined algorithm.

We need two intermediate booleans to control the state while
parsing properties lest we clobber ID_AA64ISAR1 into an invalid
intermediate state.

Backports relevent members from eb94284d0812b4e7c11c5d075b584100ac1c1b9a
This commit is contained in:
Richard Henderson 2021-03-04 13:40:24 -05:00 committed by Lioncash
parent 0332498752
commit f6973abb3e
1 changed files with 8 additions and 0 deletions
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8
qemu/target/arm/cpu.h
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@ -900,6 +900,14 @@ struct ARMCPU {
uint64_t reset_cbar;
uint32_t reset_auxcr;
bool reset_hivecs;
/*
* Intermediate values used during property parsing.
* Once finalized, the values should be read from ID_AA64ISAR1.
*/
bool prop_pauth;
bool prop_pauth_impdef;
/* DCZ blocksize, in log_2(words), ie low 4 bits of DCZID_EL0 */
uint32_t dcz_blocksize;
uint64_t rvbar;