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target/arm: Plumb debug into S1Translate

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Before using softmmu page tables for the ptw, plumb down
a debug parameter so that we can query page table entries
from gdbstub without modifying cpu state.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20221011031911.2408754-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-10-10 20:18:55 -07:00 committed by Peter Maydell
parent 6d2654ffac
commit 4a35855682
1 changed files with 37 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
target/arm/ptw.c
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@ -17,6 +17,7 @@
typedef struct S1Translate {
ARMMMUIdx in_mmu_idx;
bool in_secure;
bool in_debug;
bool out_secure;
hwaddr out_phys;
} S1Translate;
@ -230,6 +231,7 @@ static bool S1_ptw_translate(CPUARMState *env, S1Translate *ptw,
S1Translate s2ptw = {
.in_mmu_idx = s2_mmu_idx,
.in_secure = is_secure,
.in_debug = ptw->in_debug,
};
uint64_t hcr;
int ret;
@ -2370,13 +2372,15 @@ static bool get_phys_addr_disabled(CPUARMState *env, target_ulong address,
return 0;
}
bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
bool is_secure, GetPhysAddrResult *result,
static bool get_phys_addr_with_struct(CPUARMState *env, S1Translate *ptw,
target_ulong address,
MMUAccessType access_type,
GetPhysAddrResult *result,
ARMMMUFaultInfo *fi)
{
ARMMMUIdx mmu_idx = ptw->in_mmu_idx;
ARMMMUIdx s1_mmu_idx = stage_1_mmu_idx(mmu_idx);
S1Translate ptw;
bool is_secure = ptw->in_secure;
if (mmu_idx != s1_mmu_idx) {
/*
@ -2392,8 +2396,9 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
bool is_el0;
uint64_t hcr;
ret = get_phys_addr_with_secure(env, address, access_type,
s1_mmu_idx, is_secure, result, fi);
ptw->in_mmu_idx = s1_mmu_idx;
ret = get_phys_addr_with_struct(env, ptw, address, access_type,
result, fi);
/* If S1 fails or S2 is disabled, return early. */
if (ret || regime_translation_disabled(env, ARMMMUIdx_Stage2,
@ -2413,9 +2418,9 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
s2walk_secure = false;
}
ptw.in_mmu_idx =
ptw->in_mmu_idx =
s2walk_secure ? ARMMMUIdx_Stage2_S : ARMMMUIdx_Stage2;
ptw.in_secure = s2walk_secure;
ptw->in_secure = s2walk_secure;
is_el0 = mmu_idx == ARMMMUIdx_E10_0;
/*
@ -2427,7 +2432,7 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
cacheattrs1 = result->cacheattrs;
memset(result, 0, sizeof(*result));
ret = get_phys_addr_lpae(env, &ptw, ipa, access_type,
ret = get_phys_addr_lpae(env, ptw, ipa, access_type,
is_el0, result, fi);
fi->s2addr = ipa;
@ -2534,19 +2539,29 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
is_secure, result, fi);
}
ptw.in_mmu_idx = mmu_idx;
ptw.in_secure = is_secure;
if (regime_using_lpae_format(env, mmu_idx)) {
return get_phys_addr_lpae(env, &ptw, address, access_type, false,
return get_phys_addr_lpae(env, ptw, address, access_type, false,
result, fi);
} else if (regime_sctlr(env, mmu_idx) & SCTLR_XP) {
return get_phys_addr_v6(env, &ptw, address, access_type, result, fi);
return get_phys_addr_v6(env, ptw, address, access_type, result, fi);
} else {
return get_phys_addr_v5(env, &ptw, address, access_type, result, fi);
return get_phys_addr_v5(env, ptw, address, access_type, result, fi);
}
}
bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
bool is_secure, GetPhysAddrResult *result,
ARMMMUFaultInfo *fi)
{
S1Translate ptw = {
.in_mmu_idx = mmu_idx,
.in_secure = is_secure,
};
return get_phys_addr_with_struct(env, &ptw, address, access_type,
result, fi);
}
bool get_phys_addr(CPUARMState *env, target_ulong address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
GetPhysAddrResult *result, ARMMMUFaultInfo *fi)
@ -2595,12 +2610,16 @@ hwaddr arm_cpu_get_phys_page_attrs_debug(CPUState *cs, vaddr addr,
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
S1Translate ptw = {
.in_mmu_idx = arm_mmu_idx(env),
.in_secure = arm_is_secure(env),
.in_debug = true,
};
GetPhysAddrResult res = {};
ARMMMUFaultInfo fi = {};
ARMMMUIdx mmu_idx = arm_mmu_idx(env);
bool ret;
ret = get_phys_addr(env, addr, MMU_DATA_LOAD, mmu_idx, &res, &fi);
ret = get_phys_addr_with_struct(env, &ptw, addr, MMU_DATA_LOAD, &res, &fi);
*attrs = res.f.attrs;
if (ret) {