diff options
Diffstat (limited to 'include/accel')
| -rw-r--r-- | include/accel/tcg/cpu-ldst.h | 58 | ||||
| -rw-r--r-- | include/accel/tcg/cpu-ops.h | 23 | ||||
| -rw-r--r-- | include/accel/tcg/getpc.h | 4 | ||||
| -rw-r--r-- | include/accel/tcg/helper-retaddr.h | 43 | ||||
| -rw-r--r-- | include/accel/tcg/iommu.h | 41 | ||||
| -rw-r--r-- | include/accel/tcg/probe.h | 122 | ||||
| -rw-r--r-- | include/accel/tcg/tb-cpu-state.h | 18 |
7 files changed, 247 insertions, 62 deletions
diff --git a/include/accel/tcg/cpu-ldst.h b/include/accel/tcg/cpu-ldst.h index f97a730..0de7f5e 100644 --- a/include/accel/tcg/cpu-ldst.h +++ b/include/accel/tcg/cpu-ldst.h @@ -502,62 +502,4 @@ static inline uint64_t cpu_ldq_code(CPUArchState *env, abi_ptr addr) return cpu_ldq_code_mmu(env, addr, oi, 0); } -/** - * tlb_vaddr_to_host: - * @env: CPUArchState - * @addr: guest virtual address to look up - * @access_type: 0 for read, 1 for write, 2 for execute - * @mmu_idx: MMU index to use for lookup - * - * Look up the specified guest virtual index in the TCG softmmu TLB. - * If we can translate a host virtual address suitable for direct RAM - * access, without causing a guest exception, then return it. - * Otherwise (TLB entry is for an I/O access, guest software - * TLB fill required, etc) return NULL. - */ -#ifdef CONFIG_USER_ONLY -static inline void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr, - MMUAccessType access_type, int mmu_idx) -{ - return g2h(env_cpu(env), addr); -} -#else -void *tlb_vaddr_to_host(CPUArchState *env, vaddr addr, - MMUAccessType access_type, int mmu_idx); -#endif - -/* - * For user-only, helpers that use guest to host address translation - * must protect the actual host memory access by recording 'retaddr' - * for the signal handler. This is required for a race condition in - * which another thread unmaps the page between a probe and the - * actual access. - */ -#ifdef CONFIG_USER_ONLY -extern __thread uintptr_t helper_retaddr; - -static inline void set_helper_retaddr(uintptr_t ra) -{ - helper_retaddr = ra; - /* - * Ensure that this write is visible to the SIGSEGV handler that - * may be invoked due to a subsequent invalid memory operation. - */ - signal_barrier(); -} - -static inline void clear_helper_retaddr(void) -{ - /* - * Ensure that previous memory operations have succeeded before - * removing the data visible to the signal handler. - */ - signal_barrier(); - helper_retaddr = 0; -} -#else -#define set_helper_retaddr(ra) do { } while (0) -#define clear_helper_retaddr() do { } while (0) -#endif - #endif /* ACCEL_TCG_CPU_LDST_H */ diff --git a/include/accel/tcg/cpu-ops.h b/include/accel/tcg/cpu-ops.h index 0e43525..cd22e5d 100644 --- a/include/accel/tcg/cpu-ops.h +++ b/include/accel/tcg/cpu-ops.h @@ -16,6 +16,7 @@ #include "exec/memop.h" #include "exec/mmu-access-type.h" #include "exec/vaddr.h" +#include "accel/tcg/tb-cpu-state.h" #include "tcg/tcg-mo.h" struct TCGCPUOps { @@ -29,6 +30,13 @@ struct TCGCPUOps { bool mttcg_supported; /** + * @precise_smc: Stores which modify code within the current TB force + * the TB to exit; the next executed instruction will see + * the result of the store. + */ + bool precise_smc; + + /** * @guest_default_memory_order: default barrier that is required * for the guest memory ordering. */ @@ -54,6 +62,12 @@ struct TCGCPUOps { void (*translate_code)(CPUState *cpu, TranslationBlock *tb, int *max_insns, vaddr pc, void *host_pc); /** + * @get_tb_cpu_state: Extract CPU state for a TCG #TranslationBlock + * + * Fill in all data required to select or compile a TranslationBlock. + */ + TCGTBCPUState (*get_tb_cpu_state)(CPUState *cs); + /** * @synchronize_from_tb: Synchronize state from a TCG #TranslationBlock * * This is called when we abandon execution of a TB before starting it, @@ -143,11 +157,20 @@ struct TCGCPUOps { */ void (*record_sigbus)(CPUState *cpu, vaddr addr, MMUAccessType access_type, uintptr_t ra); + + /** + * untagged_addr: Remove an ignored tag from an address + * @cpu: cpu context + * @addr: tagged guest address + */ + vaddr (*untagged_addr)(CPUState *cs, vaddr addr); #else /** @do_interrupt: Callback for interrupt handling. */ void (*do_interrupt)(CPUState *cpu); /** @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec */ bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request); + /** @cpu_exec_reset: Callback for reset in cpu_exec. */ + void (*cpu_exec_reset)(CPUState *cpu); /** * @cpu_exec_halt: Callback for handling halt in cpu_exec. * diff --git a/include/accel/tcg/getpc.h b/include/accel/tcg/getpc.h index 8a97ce3..0fc08ad 100644 --- a/include/accel/tcg/getpc.h +++ b/include/accel/tcg/getpc.h @@ -8,10 +8,6 @@ #ifndef ACCEL_TCG_GETPC_H #define ACCEL_TCG_GETPC_H -#ifndef CONFIG_TCG -#error Can only include this header with TCG -#endif - /* GETPC is the true target of the return instruction that we'll execute. */ #ifdef CONFIG_TCG_INTERPRETER extern __thread uintptr_t tci_tb_ptr; diff --git a/include/accel/tcg/helper-retaddr.h b/include/accel/tcg/helper-retaddr.h new file mode 100644 index 0000000..037fda2 --- /dev/null +++ b/include/accel/tcg/helper-retaddr.h @@ -0,0 +1,43 @@ +/* + * Get user helper pc for memory unwinding. + * SPDX-License-Identifier: LGPL-2.1-or-later + */ + +#ifndef ACCEL_TCG_HELPER_RETADDR_H +#define ACCEL_TCG_HELPER_RETADDR_H + +/* + * For user-only, helpers that use guest to host address translation + * must protect the actual host memory access by recording 'retaddr' + * for the signal handler. This is required for a race condition in + * which another thread unmaps the page between a probe and the + * actual access. + */ +#ifdef CONFIG_USER_ONLY +extern __thread uintptr_t helper_retaddr; + +static inline void set_helper_retaddr(uintptr_t ra) +{ + helper_retaddr = ra; + /* + * Ensure that this write is visible to the SIGSEGV handler that + * may be invoked due to a subsequent invalid memory operation. + */ + signal_barrier(); +} + +static inline void clear_helper_retaddr(void) +{ + /* + * Ensure that previous memory operations have succeeded before + * removing the data visible to the signal handler. + */ + signal_barrier(); + helper_retaddr = 0; +} +#else +#define set_helper_retaddr(ra) do { } while (0) +#define clear_helper_retaddr() do { } while (0) +#endif + +#endif /* ACCEL_TCG_HELPER_RETADDR_H */ diff --git a/include/accel/tcg/iommu.h b/include/accel/tcg/iommu.h new file mode 100644 index 0000000..90cfd6c --- /dev/null +++ b/include/accel/tcg/iommu.h @@ -0,0 +1,41 @@ +/* + * TCG IOMMU translations. + * + * Copyright (c) 2003 Fabrice Bellard + * SPDX-License-Identifier: LGPL-2.1-or-later + */ +#ifndef ACCEL_TCG_IOMMU_H +#define ACCEL_TCG_IOMMU_H + +#ifdef CONFIG_USER_ONLY +#error Cannot include accel/tcg/iommu.h from user emulation +#endif + +#include "exec/hwaddr.h" +#include "exec/memattrs.h" + +/** + * iotlb_to_section: + * @cpu: CPU performing the access + * @index: TCG CPU IOTLB entry + * + * Given a TCG CPU IOTLB entry, return the MemoryRegionSection that + * it refers to. @index will have been initially created and returned + * by memory_region_section_get_iotlb(). + */ +MemoryRegionSection *iotlb_to_section(CPUState *cpu, + hwaddr index, MemTxAttrs attrs); + +MemoryRegionSection *address_space_translate_for_iotlb(CPUState *cpu, + int asidx, + hwaddr addr, + hwaddr *xlat, + hwaddr *plen, + MemTxAttrs attrs, + int *prot); + +hwaddr memory_region_section_get_iotlb(CPUState *cpu, + MemoryRegionSection *section); + +#endif + diff --git a/include/accel/tcg/probe.h b/include/accel/tcg/probe.h new file mode 100644 index 0000000..dd9ecbb --- /dev/null +++ b/include/accel/tcg/probe.h @@ -0,0 +1,122 @@ +/* + * Probe guest virtual addresses for access permissions. + * + * Copyright (c) 2003 Fabrice Bellard + * SPDX-License-Identifier: LGPL-2.1-or-later + */ +#ifndef ACCEL_TCG_PROBE_H +#define ACCEL_TCG_PROBE_H + +#include "exec/mmu-access-type.h" +#include "exec/vaddr.h" + +/** + * probe_access: + * @env: CPUArchState + * @addr: guest virtual address to look up + * @size: size of the access + * @access_type: read, write or execute permission + * @mmu_idx: MMU index to use for lookup + * @retaddr: return address for unwinding + * + * Look up the guest virtual address @addr. Raise an exception if the + * page does not satisfy @access_type. Raise an exception if the + * access (@addr, @size) hits a watchpoint. For writes, mark a clean + * page as dirty. + * + * Finally, return the host address for a page that is backed by RAM, + * or NULL if the page requires I/O. + */ +void *probe_access(CPUArchState *env, vaddr addr, int size, + MMUAccessType access_type, int mmu_idx, uintptr_t retaddr); + +static inline void *probe_write(CPUArchState *env, vaddr addr, int size, + int mmu_idx, uintptr_t retaddr) +{ + return probe_access(env, addr, size, MMU_DATA_STORE, mmu_idx, retaddr); +} + +static inline void *probe_read(CPUArchState *env, vaddr addr, int size, + int mmu_idx, uintptr_t retaddr) +{ + return probe_access(env, addr, size, MMU_DATA_LOAD, mmu_idx, retaddr); +} + +/** + * probe_access_flags: + * @env: CPUArchState + * @addr: guest virtual address to look up + * @size: size of the access + * @access_type: read, write or execute permission + * @mmu_idx: MMU index to use for lookup + * @nonfault: suppress the fault + * @phost: return value for host address + * @retaddr: return address for unwinding + * + * Similar to probe_access, loosely returning the TLB_FLAGS_MASK for + * the page, and storing the host address for RAM in @phost. + * + * If @nonfault is set, do not raise an exception but return TLB_INVALID_MASK. + * Do not handle watchpoints, but include TLB_WATCHPOINT in the returned flags. + * Do handle clean pages, so exclude TLB_NOTDIRY from the returned flags. + * For simplicity, all "mmio-like" flags are folded to TLB_MMIO. + */ +int probe_access_flags(CPUArchState *env, vaddr addr, int size, + MMUAccessType access_type, int mmu_idx, + bool nonfault, void **phost, uintptr_t retaddr); + +#ifndef CONFIG_USER_ONLY + +/** + * probe_access_full: + * Like probe_access_flags, except also return into @pfull. + * + * The CPUTLBEntryFull structure returned via @pfull is transient + * and must be consumed or copied immediately, before any further + * access or changes to TLB @mmu_idx. + * + * This function will not fault if @nonfault is set, but will + * return TLB_INVALID_MASK if the page is not mapped, or is not + * accessible with @access_type. + * + * This function will return TLB_MMIO in order to force the access + * to be handled out-of-line if plugins wish to instrument the access. + */ +int probe_access_full(CPUArchState *env, vaddr addr, int size, + MMUAccessType access_type, int mmu_idx, + bool nonfault, void **phost, + CPUTLBEntryFull **pfull, uintptr_t retaddr); + +/** + * probe_access_full_mmu: + * Like probe_access_full, except: + * + * This function is intended to be used for page table accesses by + * the target mmu itself. Since such page walking happens while + * handling another potential mmu fault, this function never raises + * exceptions (akin to @nonfault true for probe_access_full). + * Likewise this function does not trigger plugin instrumentation. + */ +int probe_access_full_mmu(CPUArchState *env, vaddr addr, int size, + MMUAccessType access_type, int mmu_idx, + void **phost, CPUTLBEntryFull **pfull); + +#endif /* !CONFIG_USER_ONLY */ + +/** + * tlb_vaddr_to_host: + * @env: CPUArchState + * @addr: guest virtual address to look up + * @access_type: 0 for read, 1 for write, 2 for execute + * @mmu_idx: MMU index to use for lookup + * + * Look up the specified guest virtual index in the TCG softmmu TLB. + * If we can translate a host virtual address suitable for direct RAM + * access, without causing a guest exception, then return it. + * Otherwise (TLB entry is for an I/O access, guest software + * TLB fill required, etc) return NULL. + */ +void *tlb_vaddr_to_host(CPUArchState *env, vaddr addr, + MMUAccessType access_type, int mmu_idx); + +#endif diff --git a/include/accel/tcg/tb-cpu-state.h b/include/accel/tcg/tb-cpu-state.h new file mode 100644 index 0000000..8f91290 --- /dev/null +++ b/include/accel/tcg/tb-cpu-state.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Definition of TCGTBCPUState. + */ + +#ifndef EXEC_TB_CPU_STATE_H +#define EXEC_TB_CPU_STATE_H + +#include "exec/vaddr.h" + +typedef struct TCGTBCPUState { + vaddr pc; + uint32_t flags; + uint32_t cflags; + uint64_t cs_base; +} TCGTBCPUState; + +#endif |