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Re: [Qemu-arm] [PATCH v3 08/10] Convert address_space_rw to use MemoryAc
From: |
David Gibson |
Subject: |
Re: [Qemu-arm] [PATCH v3 08/10] Convert address_space_rw to use MemoryAccessType |
Date: |
Thu, 21 Jul 2016 11:47:18 +1000 |
User-agent: |
Mutt/1.6.2 (2016-07-01) |
On Tue, Jul 19, 2016 at 10:02:58PM -0700, Andrey Smirnov wrote:
> Convert address_space_rw() to use MemoryAccessType following the
> conversion of cpu_memory_rw_debug().
>
> Signed-off-by: Andrey Smirnov <address@hidden>
Reviewed-by: David Gibson <address@hidden>
> ---
> exec.c | 14 +++++++++-----
> include/exec/memory.h | 7 +++++--
> kvm-all.c | 8 +++++---
> scripts/coverity-model.c | 9 +++++++--
> 4 files changed, 26 insertions(+), 12 deletions(-)
>
> diff --git a/exec.c b/exec.c
> index 995ff60..5557cc9 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -2726,12 +2726,16 @@ MemTxResult address_space_read_full(AddressSpace *as,
> hwaddr addr,
> }
>
> MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
> - uint8_t *buf, int len, bool is_write)
> + uint8_t *buf, int len,
> + MemoryAccessType access_type)
> {
> - if (is_write) {
> + switch (access_type) {
> + case MEM_DATA_STORE:
> return address_space_write(as, addr, attrs, buf, len);
> - } else {
> + case MEM_DATA_LOAD:
> return address_space_read(as, addr, attrs, buf, len);
> + default:
> + abort();
> }
> }
>
> @@ -2739,7 +2743,7 @@ void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
> int len, int is_write)
> {
> address_space_rw(&address_space_memory, addr, MEMTXATTRS_UNSPECIFIED,
> - buf, len, is_write);
> + buf, len, is_write ? MEM_DATA_STORE : MEM_DATA_LOAD);
> }
>
> enum write_rom_type {
> @@ -3651,7 +3655,7 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong
> addr,
> } else {
> address_space_rw(cpu->cpu_ases[asidx].as, phys_addr,
> MEMTXATTRS_UNSPECIFIED,
> - buf, l, 0);
> + buf, l, access_type);
> }
> len -= l;
> buf += l;
> diff --git a/include/exec/memory.h b/include/exec/memory.h
> index 7851ca9..da56c0e 100644
> --- a/include/exec/memory.h
> +++ b/include/exec/memory.h
> @@ -22,6 +22,7 @@
> #define DIRTY_MEMORY_NUM 3 /* num of dirty bits */
>
> #include "exec/cpu-common.h"
> +#include "qom/cpu.h"
> #ifndef CONFIG_USER_ONLY
> #include "exec/hwaddr.h"
> #endif
> @@ -1284,11 +1285,13 @@ void address_space_destroy(AddressSpace *as);
> * @addr: address within that address space
> * @attrs: memory transaction attributes
> * @buf: buffer with the data transferred
> - * @is_write: indicates the transfer direction
> + * @access_type: indicates the transfer direction (only valid values
> + * are MEM_DATA_LOAD for data reads and MEM_DATA_STORE for data
> + * writes)
> */
> MemTxResult address_space_rw(AddressSpace *as, hwaddr addr,
> MemTxAttrs attrs, uint8_t *buf,
> - int len, bool is_write);
> + int len, MemoryAccessType access_type);
>
> /**
> * address_space_write: write to address space.
> diff --git a/kvm-all.c b/kvm-all.c
> index a88f917..ed45a95 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -1767,11 +1767,12 @@ static void kvm_handle_io(uint16_t port, MemTxAttrs
> attrs, void *data, int direc
> {
> int i;
> uint8_t *ptr = data;
> + MemoryAccessType access_type =
> + (direction == KVM_EXIT_IO_OUT) ? MEM_DATA_STORE : MEM_DATA_LOAD;
>
> for (i = 0; i < count; i++) {
> address_space_rw(&address_space_io, port, attrs,
> - ptr, size,
> - direction == KVM_EXIT_IO_OUT);
> + ptr, size, access_type);
> ptr += size;
> }
> }
> @@ -1947,7 +1948,8 @@ int kvm_cpu_exec(CPUState *cpu)
> run->mmio.phys_addr, attrs,
> run->mmio.data,
> run->mmio.len,
> - run->mmio.is_write);
> + run->mmio.is_write ?
> + MEM_DATA_STORE : MEM_DATA_LOAD);
> ret = 0;
> break;
> case KVM_EXIT_IRQ_WINDOW_OPEN:
> diff --git a/scripts/coverity-model.c b/scripts/coverity-model.c
> index ee5bf9d..c5603b5 100644
> --- a/scripts/coverity-model.c
> +++ b/scripts/coverity-model.c
> @@ -68,13 +68,18 @@ static void __bufread(uint8_t *buf, ssize_t len)
> }
>
> MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
> - uint8_t *buf, int len, bool is_write)
> + uint8_t *buf, int len,
> + MemoryAccessType access_type)
> {
> MemTxResult result;
>
> // TODO: investigate impact of treating reads as producing
> // tainted data, with __coverity_tainted_data_argument__(buf).
> - if (is_write) __bufread(buf, len); else __bufwrite(buf, len);
> + if (access_type == MEM_DATA_STORE) {
> + __bufread(buf, len);
> + } else {
> + __bufwrite(buf, len);
> + }
>
> return result;
> }
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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- [Qemu-arm] [PATCH v3 00/10] Support non-direct memory writes in cpu_memory_rw_debug, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 02/10] Change signature of address_space_read() to avoid casting, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 03/10] Change signature of address_space_write() to avoid casting, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 01/10] Avoid needless calls to address_space_rw(), Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 04/10] address_space_write_continue: Distill common code, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 09/10] gdbstub: Convert target_memory_rw_debug to use MemoryAccessType, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 08/10] Convert address_space_rw to use MemoryAccessType, Andrey Smirnov, 2016/07/20
- Re: [Qemu-arm] [PATCH v3 08/10] Convert address_space_rw to use MemoryAccessType,
David Gibson <=
- [Qemu-arm] [PATCH v3 07/10] Convert cpu_memory_rw_debug to use MemoryAccessType, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 10/10] exec: Use address_space_rw to handle reads and wirtes, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 05/10] Rename MMUAccessType to MemoryAccessType, Andrey Smirnov, 2016/07/20
- [Qemu-arm] [PATCH v3 06/10] Change signature of cpu_memory_rw_debug() to avoid casting, Andrey Smirnov, 2016/07/20