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target-arm: Fix translation level on early translation faults 

Qemu reports translation fault on 1st level instead of 0th level in case of
AArch64 address translation if the translation table walk is disabled or
the address is in the gap between the two regions.

Signed-off-by: Sergey Sorokin <afarallax@yandex.ru>
Message-id: 1457527503-25958-1-git-send-email-afarallax@yandex.ru
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
stable-2.6
Sergey Sorokin 2016-03-16 17:05:58 +00:00 committed by Peter Maydell
parent 8bfd0550be
commit 1b4093ea66
1 changed files with 12 additions and 10 deletions
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22
target-arm/helper.c
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@ -7237,7 +7237,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
CPUState *cs = CPU(cpu);
/* Read an LPAE long-descriptor translation table. */
MMUFaultType fault_type = translation_fault;
uint32_t level = 1;
uint32_t level;
uint32_t epd = 0;
int32_t t0sz, t1sz;
uint32_t tg;
@ -7248,7 +7248,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
target_ulong page_size;
uint32_t attrs;
int32_t stride = 9;
int32_t va_size = 32;
int32_t va_size;
int inputsize;
int32_t tbi = 0;
TCR *tcr = regime_tcr(env, mmu_idx);
@ -7264,6 +7264,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
* support for those page table walks.
*/
if (arm_el_is_aa64(env, el)) {
level = 0;
va_size = 64;
if (el > 1) {
if (mmu_idx != ARMMMUIdx_S2NS) {
@ -7285,6 +7286,8 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
ttbr1_valid = false;
}
} else {
level = 1;
va_size = 32;
/* There is no TTBR1 for EL2 */
if (el == 2) {
ttbr1_valid = false;
@ -7407,27 +7410,26 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
/* For stage 2 translations the starting level is specified by the
* VTCR_EL2.SL0 field (whose interpretation depends on the page size)
*/
int startlevel = extract32(tcr->raw_tcr, 6, 2);
uint32_t sl0 = extract32(tcr->raw_tcr, 6, 2);
uint32_t startlevel;
bool ok;
if (va_size == 32 || stride == 9) {
/* AArch32 or 4KB pages */
level = 2 - startlevel;
startlevel = 2 - sl0;
} else {
/* 16KB or 64KB pages */
level = 3 - startlevel;
startlevel = 3 - sl0;
}
/* Check that the starting level is valid. */
ok = check_s2_mmu_setup(cpu, va_size == 64, level, inputsize, stride);
ok = check_s2_mmu_setup(cpu, va_size == 64, startlevel,
inputsize, stride);
if (!ok) {
/* AArch64 reports these as level 0 faults.
* AArch32 reports these as level 1 faults.
*/
level = va_size == 64 ? 0 : 1;
fault_type = translation_fault;
goto do_fault;
}
level = startlevel;
}
/* Clear the vaddr bits which aren't part of the within-region address,