motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

cputlb: Add functions for flushing TLB for a single MMU index

Browse source 
Guest CPU TLB maintenance operations may be sufficiently
specialized to only need to flush TLB entries corresponding
to a particular MMU index. Implement cputlb functions for
this, to avoid the inefficiency of flushing TLB entries
which we don't need to.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1439548879-1972-2-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2015-08-25 15:45:09 +01:00
parent 14db7fe09a
commit d7a74a9d4a
2 changed files with 144 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

47
include/exec/exec-all.h
View file

@ -96,8 +96,46 @@ bool qemu_in_vcpu_thread(void);
void cpu_reload_memory_map(CPUState *cpu);
void tcg_cpu_address_space_init(CPUState *cpu, AddressSpace *as);
/* cputlb.c */
/**
* tlb_flush_page:
* @cpu: CPU whose TLB should be flushed
* @addr: virtual address of page to be flushed
*
* Flush one page from the TLB of the specified CPU, for all
* MMU indexes.
*/
void tlb_flush_page(CPUState *cpu, target_ulong addr);
/**
* tlb_flush:
* @cpu: CPU whose TLB should be flushed
* @flush_global: ignored
*
* Flush the entire TLB for the specified CPU.
* The flush_global flag is in theory an indicator of whether the whole
* TLB should be flushed, or only those entries not marked global.
* In practice QEMU does not implement any global/not global flag for
* TLB entries, and the argument is ignored.
*/
void tlb_flush(CPUState *cpu, int flush_global);
/**
* tlb_flush_page_by_mmuidx:
* @cpu: CPU whose TLB should be flushed
* @addr: virtual address of page to be flushed
* @...: list of MMU indexes to flush, terminated by a negative value
*
* Flush one page from the TLB of the specified CPU, for the specified
* MMU indexes.
*/
void tlb_flush_page_by_mmuidx(CPUState *cpu, target_ulong addr, ...);
/**
* tlb_flush_by_mmuidx:
* @cpu: CPU whose TLB should be flushed
* @...: list of MMU indexes to flush, terminated by a negative value
*
* Flush all entries from the TLB of the specified CPU, for the specified
* MMU indexes.
*/
void tlb_flush_by_mmuidx(CPUState *cpu, ...);
void tlb_set_page(CPUState *cpu, target_ulong vaddr,
hwaddr paddr, int prot,
int mmu_idx, target_ulong size);
@ -115,6 +153,15 @@ static inline void tlb_flush_page(CPUState *cpu, target_ulong addr)
static inline void tlb_flush(CPUState *cpu, int flush_global)
{
}
static inline void tlb_flush_page_by_mmuidx(CPUState *cpu,
target_ulong addr, ...)
{
}
static inline void tlb_flush_by_mmuidx(CPUState *cpu, ...)
{
}
#endif
#define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */