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accel/tcg: Extract probe API out of 'exec/exec-all.h'

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Declare probe methods in "accel/tcg/probe.h" to emphasize
they are specific to TCG accelerator.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250424202412.91612-13-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2025-04-24 22:24:11 +02:00 • committed by Richard Henderson
parent f12b717717
commit fe1a3ace13
24 changed files with 128 additions and 100 deletions
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100
include/exec/exec-all.h
View file

@ -20,104 +20,4 @@
#ifndef EXEC_ALL_H
#define EXEC_ALL_H
#include "exec/hwaddr.h"
#include "exec/mmu-access-type.h"
#include "exec/vaddr.h"
#if defined(CONFIG_TCG)
/**
* 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 */
#endif /* CONFIG_TCG */
#endif