yuzu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2024-12-22 19:15:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

target/arm: Use the proper TBI settings for linux-user

Browse source 
We were fudging TBI1 enabled to speed up the generated code.
Now that we've improved the code generation, remove this.
Also, tidy the comment to reflect the current code.

The pauth test was testing a kernel address (-1) and making
incorrect assumptions about TBI1; stick to userland addresses.

Backports 16c849784873d10d0da257d698e391fddea1f0e4
This commit is contained in:
Richard Henderson 2021-03-04 18:41:47 -05:00 committed by Lioncash
parent de982a8346
commit 84368d2d6d
2 changed files with 5 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
qemu/target/arm/cpu.c
View file

@ -197,14 +197,10 @@ static void arm_cpu_reset(CPUState *s)
env->vfp.zcr_el[2] = env->vfp.zcr_el[1];
env->vfp.zcr_el[3] = env->vfp.zcr_el[1];
/*
* Enable TBI0 and TBI1. While the real kernel only enables TBI0,
* turning on both here will produce smaller code and otherwise
* make no difference to the user-level emulation.
*
* In sve_probe_page, we assume that this is set.
* Do not modify this without other changes.
* Enable TBI0 but not TBI1.
* Note that this must match useronly_clean_ptr.
*/
env->cp15.tcr_el[1].raw_tcr = (3ULL << 37);
env->cp15.tcr_el[1].raw_tcr = (1ULL << 37);
#else
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {

4
qemu/target/arm/internals.h
View file

@ -1420,9 +1420,9 @@ static inline bool tcma_check(uint32_t desc, int bit55, int ptr_tag)
*/
static inline uint64_t useronly_clean_ptr(uint64_t ptr)
{
/* TBI is known to be enabled. */
#ifdef CONFIG_USER_ONLY
ptr = sextract64(ptr, 0, 56);
/* TBI0 is known to be enabled, while TBI1 is disabled. */
ptr &= sextract64(ptr, 0, 56);
#endif
return ptr;
}