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target/arm: Cache the Tagged bit for a page in MemTxAttrs

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This "bit" is a particular value of the page's MemAttr.

Backports commit 337a03f07ff0f9e6295662f4094e03a045b60bdc from qemu
This commit is contained in:
Richard Henderson 2021-02-25 22:48:01 -05:00 committed by Lioncash
parent 28cd096d67
commit 2ea0b53c1a
2 changed files with 29 additions and 0 deletions
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24
qemu/target/arm/helper.c
View file

@ -11798,10 +11798,34 @@ bool get_phys_addr(CPUARMState *env, target_ulong address,
/* Definitely a real MMU, not an MPU */
if (regime_translation_disabled(env, mmu_idx)) {
uint64_t hcr;
uint8_t memattr;
/* MMU disabled. */
*phys_ptr = address;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
*page_size = TARGET_PAGE_SIZE;
/* Fill in cacheattr a-la AArch64.TranslateAddressS1Off. */
hcr = arm_hcr_el2_eff(env);
cacheattrs->shareability = 0;
if (hcr & HCR_DC) {
if (hcr & HCR_DCT) {
memattr = 0xf0; /* Tagged, Normal, WB, RWA */
} else {
memattr = 0xff; /* Normal, WB, RWA */
}
} else if (access_type == MMU_INST_FETCH) {
if (regime_sctlr(env, mmu_idx) & SCTLR_I) {
memattr = 0xee; /* Normal, WT, RA, NT */
} else {
memattr = 0x44; /* Normal, NC, No */
}
cacheattrs->shareability = 2; /* outer sharable */
} else {
memattr = 0x00; /* Device, nGnRnE */
}
cacheattrs->attrs = memattr;
return 0;
}

5
qemu/target/arm/tlb_helper.c
View file

@ -188,6 +188,11 @@ bool arm_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
phys_addr &= TARGET_PAGE_MASK;
address &= TARGET_PAGE_MASK;
}
/* Notice and record tagged memory. */
if (cpu_isar_feature(aa64_mte, cpu) && cacheattrs.attrs == 0xf0) {
arm_tlb_mte_tagged(&attrs) = true;
}
tlb_set_page_with_attrs(cs, address, phys_addr, attrs,
prot, mmu_idx, page_size);
return true;