* [PATCH] plugins: Fix physical address calculation for IO regions
@ 2021-07-20 19:57 Aaron Lindsay
2021-07-20 20:02 ` [PATCH-for-6.1?] " Philippe Mathieu-Daudé
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Aaron Lindsay @ 2021-07-20 19:57 UTC (permalink / raw)
To: qemu-devel, Philippe Mathieu-Daudé, Alex Bennée
Cc: cota, richard.henderson, Paolo Bonzini, Peter Xu, Aaron Lindsay
The address calculation for IO regions introduced by
commit 787148bf928a54b5cc86f5b434f9399e9737679c
Author: Aaron Lindsay <aaron@os.amperecomputing.com>
plugins: Expose physical addresses instead of device offsets
is not always accurate. Use the more correct
MemoryRegionSection.offset_within_address_space.
---
plugins/api.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/plugins/api.c b/plugins/api.c
index 5c1a413928..ba14e6f2b2 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -319,7 +319,7 @@ uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr)
return block->offset + offset + block->mr->addr;
} else {
MemoryRegionSection *mrs = haddr->v.io.section;
- return haddr->v.io.offset + mrs->mr->addr;
+ return mrs->offset_within_address_space + haddr->v.io.offset;
}
}
#endif
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH-for-6.1?] plugins: Fix physical address calculation for IO regions
2021-07-20 19:57 [PATCH] plugins: Fix physical address calculation for IO regions Aaron Lindsay
@ 2021-07-20 20:02 ` Philippe Mathieu-Daudé
2021-07-20 20:04 ` [PATCH] " Aaron Lindsay
2021-07-20 22:14 ` Alex Bennée
2 siblings, 0 replies; 4+ messages in thread
From: Philippe Mathieu-Daudé @ 2021-07-20 20:02 UTC (permalink / raw)
To: Aaron Lindsay, qemu-devel, Alex Bennée
Cc: Paolo Bonzini, cota, richard.henderson, Peter Xu
On 7/20/21 9:57 PM, Aaron Lindsay wrote:
> The address calculation for IO regions introduced by
>
> commit 787148bf928a54b5cc86f5b434f9399e9737679c
> Author: Aaron Lindsay <aaron@os.amperecomputing.com>
> plugins: Expose physical addresses instead of device offsets
>
> is not always accurate.
Indeed unlikely accurate in case of aliases (at least).
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> Use the more correct
> MemoryRegionSection.offset_within_address_space.
> ---
> plugins/api.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/plugins/api.c b/plugins/api.c
> index 5c1a413928..ba14e6f2b2 100644
> --- a/plugins/api.c
> +++ b/plugins/api.c
> @@ -319,7 +319,7 @@ uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr)
> return block->offset + offset + block->mr->addr;
> } else {
> MemoryRegionSection *mrs = haddr->v.io.section;
> - return haddr->v.io.offset + mrs->mr->addr;
> + return mrs->offset_within_address_space + haddr->v.io.offset;
> }
> }
> #endif
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] plugins: Fix physical address calculation for IO regions
2021-07-20 19:57 [PATCH] plugins: Fix physical address calculation for IO regions Aaron Lindsay
2021-07-20 20:02 ` [PATCH-for-6.1?] " Philippe Mathieu-Daudé
@ 2021-07-20 20:04 ` Aaron Lindsay
2021-07-20 22:14 ` Alex Bennée
2 siblings, 0 replies; 4+ messages in thread
From: Aaron Lindsay @ 2021-07-20 20:04 UTC (permalink / raw)
To: qemu-devel, Philippe Mathieu-Daudé, Alex Bennée
Cc: cota, richard.henderson, Paolo Bonzini, Peter Xu
For reference, this patch is intended to address this conversation:
https://lists.nongnu.org/archive/html/qemu-devel/2021-07/msg01293.html
This appears to be better than the previous version in my testing, but I
absolutely welcome being told there is a better way to solve this!
Thanks!
-Aaron
On Jul 20 15:57, Aaron Lindsay wrote:
> The address calculation for IO regions introduced by
>
> commit 787148bf928a54b5cc86f5b434f9399e9737679c
> Author: Aaron Lindsay <aaron@os.amperecomputing.com>
> plugins: Expose physical addresses instead of device offsets
>
> is not always accurate. Use the more correct
> MemoryRegionSection.offset_within_address_space.
Whoops, forgot my:
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
> ---
> plugins/api.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/plugins/api.c b/plugins/api.c
> index 5c1a413928..ba14e6f2b2 100644
> --- a/plugins/api.c
> +++ b/plugins/api.c
> @@ -319,7 +319,7 @@ uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr)
> return block->offset + offset + block->mr->addr;
> } else {
> MemoryRegionSection *mrs = haddr->v.io.section;
> - return haddr->v.io.offset + mrs->mr->addr;
> + return mrs->offset_within_address_space + haddr->v.io.offset;
> }
> }
> #endif
> --
> 2.17.1
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] plugins: Fix physical address calculation for IO regions
2021-07-20 19:57 [PATCH] plugins: Fix physical address calculation for IO regions Aaron Lindsay
2021-07-20 20:02 ` [PATCH-for-6.1?] " Philippe Mathieu-Daudé
2021-07-20 20:04 ` [PATCH] " Aaron Lindsay
@ 2021-07-20 22:14 ` Alex Bennée
2 siblings, 0 replies; 4+ messages in thread
From: Alex Bennée @ 2021-07-20 22:14 UTC (permalink / raw)
To: Aaron Lindsay
Cc: richard.henderson, qemu-devel, Peter Xu, cota, Paolo Bonzini,
Philippe Mathieu-Daudé
Aaron Lindsay <aaron@os.amperecomputing.com> writes:
> The address calculation for IO regions introduced by
>
> commit 787148bf928a54b5cc86f5b434f9399e9737679c
> Author: Aaron Lindsay <aaron@os.amperecomputing.com>
> plugins: Expose physical addresses instead of device offsets
Queued to for-6.1/fixes-for-rc1, thanks.
>
> is not always accurate. Use the more correct
> MemoryRegionSection.offset_within_address_space.
> ---
> plugins/api.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/plugins/api.c b/plugins/api.c
> index 5c1a413928..ba14e6f2b2 100644
> --- a/plugins/api.c
> +++ b/plugins/api.c
> @@ -319,7 +319,7 @@ uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr)
> return block->offset + offset + block->mr->addr;
> } else {
> MemoryRegionSection *mrs = haddr->v.io.section;
> - return haddr->v.io.offset + mrs->mr->addr;
> + return mrs->offset_within_address_space + haddr->v.io.offset;
> }
> }
> #endif
--
Alex Bennée
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-07-20 19:57 [PATCH] plugins: Fix physical address calculation for IO regions Aaron Lindsay
2021-07-20 20:02 ` [PATCH-for-6.1?] " Philippe Mathieu-Daudé
2021-07-20 20:04 ` [PATCH] " Aaron Lindsay
2021-07-20 22:14 ` Alex Bennée
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