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target-arm: Add ARMMMUFaultInfo

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Introduce ARMMMUFaultInfo to propagate MMU Fault information
across the MMU translation code path. This is in preparation for
adding Stage-2 translation.

No functional changes.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1445864527-14520-11-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Edgar E. Iglesias 2015-10-26 14:02:03 +01:00 committed by Peter Maydell
parent af51f566ec
commit e14b5a23d8
3 changed files with 36 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
target-arm/helper.c
View File

@ -18,7 +18,8 @@
static bool get_phys_addr(CPUARMState *env, target_ulong address,
int access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot,
target_ulong *page_size, uint32_t *fsr);
target_ulong *page_size, uint32_t *fsr,
ARMMMUFaultInfo *fi);
/* Definitions for the PMCCNTR and PMCR registers */
#define PMCRD 0x8
@ -1778,9 +1779,10 @@ static uint64_t do_ats_write(CPUARMState *env, uint64_t value,
bool ret;
uint64_t par64;
MemTxAttrs attrs = {};
ARMMMUFaultInfo fi = {};
ret = get_phys_addr(env, value, access_type, mmu_idx,
&phys_addr, &attrs, &prot, &page_size, &fsr);
&phys_addr, &attrs, &prot, &page_size, &fsr, &fi);
if (extended_addresses_enabled(env)) {
/* fsr is a DFSR/IFSR value for the long descriptor
* translation table format, but with WnR always clear.
@ -6231,7 +6233,8 @@ static uint64_t arm_ldq_ptw(CPUState *cs, hwaddr addr, bool is_secure)
static bool get_phys_addr_v5(CPUARMState *env, uint32_t address,
int access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, int *prot,
target_ulong *page_size, uint32_t *fsr)
target_ulong *page_size, uint32_t *fsr,
ARMMMUFaultInfo *fi)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
int code;
@ -6344,7 +6347,8 @@ do_fault:
static bool get_phys_addr_v6(CPUARMState *env, uint32_t address,
int access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot,
target_ulong *page_size, uint32_t *fsr)
target_ulong *page_size, uint32_t *fsr,
ARMMMUFaultInfo *fi)
{
CPUState *cs = CPU(arm_env_get_cpu(env));
int code;
@ -6554,7 +6558,8 @@ static bool check_s2_startlevel(ARMCPU *cpu, bool is_aa64, int level,
static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
int access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *txattrs, int *prot,
target_ulong *page_size_ptr, uint32_t *fsr)
target_ulong *page_size_ptr, uint32_t *fsr,
ARMMMUFaultInfo *fi)
{
ARMCPU *cpu = arm_env_get_cpu(env);
CPUState *cs = CPU(cpu);
@ -7129,7 +7134,8 @@ static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address,
static bool get_phys_addr(CPUARMState *env, target_ulong address,
int access_type, ARMMMUIdx mmu_idx,
hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot,
target_ulong *page_size, uint32_t *fsr)
target_ulong *page_size, uint32_t *fsr,
ARMMMUFaultInfo *fi)
{
if (mmu_idx == ARMMMUIdx_S12NSE0 || mmu_idx == ARMMMUIdx_S12NSE1) {
/* TODO: when we support EL2 we should here call ourselves recursively
@ -7188,13 +7194,13 @@ static bool get_phys_addr(CPUARMState *env, target_ulong address,
if (regime_using_lpae_format(env, mmu_idx)) {
return get_phys_addr_lpae(env, address, access_type, mmu_idx, phys_ptr,
attrs, prot, page_size, fsr);
attrs, prot, page_size, fsr, fi);
} else if (regime_sctlr(env, mmu_idx) & SCTLR_XP) {
return get_phys_addr_v6(env, address, access_type, mmu_idx, phys_ptr,
attrs, prot, page_size, fsr);
attrs, prot, page_size, fsr, fi);
} else {
return get_phys_addr_v5(env, address, access_type, mmu_idx, phys_ptr,
prot, page_size, fsr);
prot, page_size, fsr, fi);
}
}
@ -7203,7 +7209,8 @@ static bool get_phys_addr(CPUARMState *env, target_ulong address,
* fsr with ARM DFSR/IFSR fault register format value on failure.
*/
bool arm_tlb_fill(CPUState *cs, vaddr address,
int access_type, int mmu_idx, uint32_t *fsr)
int access_type, int mmu_idx, uint32_t *fsr,
ARMMMUFaultInfo *fi)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
@ -7214,7 +7221,7 @@ bool arm_tlb_fill(CPUState *cs, vaddr address,
MemTxAttrs attrs = {};
ret = get_phys_addr(env, address, access_type, mmu_idx, &phys_addr,
&attrs, &prot, &page_size, fsr);
&attrs, &prot, &page_size, fsr, fi);
if (!ret) {
/* Map a single [sub]page. */
phys_addr &= TARGET_PAGE_MASK;
@ -7237,9 +7244,10 @@ hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
bool ret;
uint32_t fsr;
MemTxAttrs attrs = {};
ARMMMUFaultInfo fi = {};
ret = get_phys_addr(env, addr, 0, cpu_mmu_index(env, false), &phys_addr,
&attrs, &prot, &page_size, &fsr);
&attrs, &prot, &page_size, &fsr, &fi);
if (ret) {
return -1;

15
target-arm/internals.h
View File

@ -414,8 +414,21 @@ bool arm_is_psci_call(ARMCPU *cpu, int excp_type);
void arm_handle_psci_call(ARMCPU *cpu);
#endif
/**
* ARMMMUFaultInfo: Information describing an ARM MMU Fault
* @s2addr: Address that caused a fault at stage 2
* @stage2: True if we faulted at stage 2
* @s1ptw: True if we faulted at stage 2 while doing a stage 1 page-table walk
*/
typedef struct ARMMMUFaultInfo ARMMMUFaultInfo;
struct ARMMMUFaultInfo {
target_ulong s2addr;
bool stage2;
bool s1ptw;
};
/* Do a page table walk and add page to TLB if possible */
bool arm_tlb_fill(CPUState *cpu, vaddr address, int rw, int mmu_idx,
uint32_t *fsr);
uint32_t *fsr, ARMMMUFaultInfo *fi);
#endif

3
target-arm/op_helper.c
View File

@ -83,8 +83,9 @@ void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
{
bool ret;
uint32_t fsr = 0;
ARMMMUFaultInfo fi = {};
ret = arm_tlb_fill(cs, addr, is_write, mmu_idx, &fsr);
ret = arm_tlb_fill(cs, addr, is_write, mmu_idx, &fsr, &fi);
if (unlikely(ret)) {
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;