From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Edgar E. Iglesias" <edgar.iglesias@amd.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Peter Xu" <peterx@redhat.com>,
"David Hildenbrand" <david@redhat.com>
Subject: [PULL 26/28] softmmu: Pass RAM MemoryRegion and is_write in xen_map_cache()
Date: Mon, 6 May 2024 14:37:26 +0200 [thread overview]
Message-ID: <20240506123728.65278-27-philmd@linaro.org> (raw)
In-Reply-To: <20240506123728.65278-1-philmd@linaro.org>
From: "Edgar E. Iglesias" <edgar.iglesias@amd.com>
Propagate MR and is_write to xen_map_cache().
This is in preparation for adding support for grant mappings.
No functional change.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-ID: <20240430164939.925307-14-edgar.iglesias@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
include/sysemu/xen-mapcache.h | 11 +++++++----
hw/xen/xen-mapcache.c | 10 ++++++----
system/physmem.c | 31 +++++++++++++++++++++++--------
3 files changed, 36 insertions(+), 16 deletions(-)
diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h
index 10c2e3082a..1ec9e66752 100644
--- a/include/sysemu/xen-mapcache.h
+++ b/include/sysemu/xen-mapcache.h
@@ -18,8 +18,9 @@ typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset,
void xen_map_cache_init(phys_offset_to_gaddr_t f,
void *opaque);
-uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
- uint8_t lock, bool dma);
+uint8_t *xen_map_cache(MemoryRegion *mr, hwaddr phys_addr, hwaddr size,
+ uint8_t lock, bool dma,
+ bool is_write);
ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
void xen_invalidate_map_cache_entry(uint8_t *buffer);
void xen_invalidate_map_cache(void);
@@ -33,10 +34,12 @@ static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
{
}
-static inline uint8_t *xen_map_cache(hwaddr phys_addr,
+static inline uint8_t *xen_map_cache(MemoryRegion *mr,
+ hwaddr phys_addr,
hwaddr size,
uint8_t lock,
- bool dma)
+ bool dma,
+ bool is_write)
{
abort();
}
diff --git a/hw/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c
index 6fb2db2612..fa6813b1ad 100644
--- a/hw/xen/xen-mapcache.c
+++ b/hw/xen/xen-mapcache.c
@@ -254,7 +254,7 @@ static void xen_remap_bucket(MapCache *mc,
static uint8_t *xen_map_cache_unlocked(MapCache *mc,
hwaddr phys_addr, hwaddr size,
- uint8_t lock, bool dma)
+ uint8_t lock, bool dma, bool is_write)
{
MapCacheEntry *entry, *pentry = NULL,
*free_entry = NULL, *free_pentry = NULL;
@@ -377,13 +377,15 @@ tryagain:
return mc->last_entry->vaddr_base + address_offset;
}
-uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
- uint8_t lock, bool dma)
+uint8_t *xen_map_cache(MemoryRegion *mr,
+ hwaddr phys_addr, hwaddr size,
+ uint8_t lock, bool dma,
+ bool is_write)
{
uint8_t *p;
mapcache_lock(mapcache);
- p = xen_map_cache_unlocked(mapcache, phys_addr, size, lock, dma);
+ p = xen_map_cache_unlocked(mapcache, phys_addr, size, lock, dma, is_write);
mapcache_unlock(mapcache);
return p;
}
diff --git a/system/physmem.c b/system/physmem.c
index 8278e31c1a..79d46054c5 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -2191,11 +2191,22 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
/*
* Return a host pointer to guest's ram.
+ * For Xen, foreign mappings get created if they don't already exist.
+ *
+ * @block: block for the RAM to lookup (optional and may be NULL).
+ * @addr: address within the memory region.
+ * @size: pointer to requested size (optional and may be NULL).
+ * size may get modified and return a value smaller than
+ * what was requested.
+ * @lock: wether to lock the mapping in xen-mapcache until invalidated.
+ * @is_write: hint wether to map RW or RO in the xen-mapcache.
+ * (optional and may always be set to true).
*
* Called within RCU critical section.
*/
static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr,
- hwaddr *size, bool lock)
+ hwaddr *size, bool lock,
+ bool is_write)
{
hwaddr len = 0;
@@ -2218,10 +2229,13 @@ static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr,
* In that case just map the requested area.
*/
if (block->offset == 0) {
- return xen_map_cache(addr, len, lock, lock);
+ return xen_map_cache(block->mr, addr, len, lock, lock,
+ is_write);
}
- block->host = xen_map_cache(block->offset, block->max_length, 1, lock);
+ block->host = xen_map_cache(block->mr, block->offset,
+ block->max_length, 1,
+ lock, is_write);
}
return ramblock_ptr(block, addr);
@@ -2237,7 +2251,7 @@ static void *qemu_ram_ptr_length(RAMBlock *block, ram_addr_t addr,
*/
void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr)
{
- return qemu_ram_ptr_length(ram_block, addr, NULL, false);
+ return qemu_ram_ptr_length(ram_block, addr, NULL, false, true);
}
/* Return the offset of a hostpointer within a ramblock */
@@ -2747,7 +2761,7 @@ static MemTxResult flatview_write_continue_step(MemTxAttrs attrs,
} else {
/* RAM case */
uint8_t *ram_ptr = qemu_ram_ptr_length(mr->ram_block, mr_addr, l,
- false);
+ false, true);
memmove(ram_ptr, buf, *l);
invalidate_and_set_dirty(mr, mr_addr, *l);
@@ -2840,7 +2854,7 @@ static MemTxResult flatview_read_continue_step(MemTxAttrs attrs, uint8_t *buf,
} else {
/* RAM case */
uint8_t *ram_ptr = qemu_ram_ptr_length(mr->ram_block, mr_addr, l,
- false);
+ false, false);
memcpy(buf, ram_ptr, *l);
@@ -3234,7 +3248,7 @@ void *address_space_map(AddressSpace *as,
*plen = flatview_extend_translation(fv, addr, len, mr, xlat,
l, is_write, attrs);
fuzz_dma_read_cb(addr, *plen, mr);
- return qemu_ram_ptr_length(mr->ram_block, xlat, plen, true);
+ return qemu_ram_ptr_length(mr->ram_block, xlat, plen, true, is_write);
}
/* Unmaps a memory region previously mapped by address_space_map().
@@ -3330,7 +3344,8 @@ int64_t address_space_cache_init(MemoryRegionCache *cache,
l = flatview_extend_translation(cache->fv, addr, len, mr,
cache->xlat, l, is_write,
MEMTXATTRS_UNSPECIFIED);
- cache->ptr = qemu_ram_ptr_length(mr->ram_block, cache->xlat, &l, true);
+ cache->ptr = qemu_ram_ptr_length(mr->ram_block, cache->xlat, &l, true,
+ is_write);
} else {
cache->ptr = NULL;
}
--
2.41.0
next prev parent reply other threads:[~2024-05-06 12:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-06 12:37 [PULL 00/28] Accelerator patches for 2024-05-06 Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 01/28] exec/cpu: Indent TARGET_PAGE_foo definitions Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 02/28] exec/cpu: Rename PAGE_BITS macro to PAGE_RWX Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 03/28] exec/cpu: Remove obsolete PAGE_RESERVED definition Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 04/28] exec/cpu: Remove duplicated PAGE_PASSTHROUGH definition Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 05/28] exec/cpu: Extract page-protection definitions to page-protection.h Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 06/28] accel/tcg: Use cpu_loop_exit_requested() in cpu_loop_exec_tb() Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 07/28] accel/tcg: Access tcg_cflags with getter / setter Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 08/28] accel/tcg: Move user definition of cpu_interrupt() to user-exec.c Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 09/28] accel/tcg: Update CPUNegativeOffsetState::can_do_io field documentation Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 10/28] accel/tcg: Restrict qemu_plugin_vcpu_exit_hook() to TCG plugins Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 11/28] accel/tcg: Restrict cpu_plugin_mem_cbs_enabled() to TCG Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 12/28] accel/tcg: Move @plugin_mem_cbs from CPUState to CPUNegativeOffsetState Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 13/28] user: Forward declare TaskState type definition Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 14/28] user: Declare get_task_state() once in 'accel/tcg/vcpu-state.h' Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 15/28] user: Use get_task_state() helper Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 16/28] softmmu: let qemu_map_ram_ptr() use qemu_ram_ptr_length() Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 17/28] xen: let xen_ram_addr_from_mapcache() return -1 in case of not found entry Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 18/28] xen: mapcache: Refactor lock functions for multi-instance Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 19/28] xen: mapcache: Refactor xen_map_cache " Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 20/28] xen: mapcache: Refactor xen_remap_bucket " Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 21/28] xen: mapcache: Break out xen_ram_addr_from_mapcache_single Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 22/28] xen: mapcache: Refactor xen_replace_cache_entry_unlocked Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 23/28] xen: mapcache: Refactor xen_invalidate_map_cache_entry_unlocked Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 24/28] xen: mapcache: Break out xen_invalidate_map_cache_single() Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 25/28] xen: mapcache: Break out xen_map_cache_init_single() Philippe Mathieu-Daudé
2024-05-06 12:37 ` Philippe Mathieu-Daudé [this message]
2024-05-06 12:37 ` [PULL 27/28] MAINTAINERS: Update Aleksandar Rikalo email Philippe Mathieu-Daudé
2024-05-06 12:37 ` [PULL 28/28] MAINTAINERS: Update my email address Philippe Mathieu-Daudé
2024-05-06 12:44 ` [PULL 00/28] Accelerator patches for 2024-05-06 Philippe Mathieu-Daudé
2024-05-06 19:59 ` Richard Henderson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240506123728.65278-27-philmd@linaro.org \
--to=philmd@linaro.org \
--cc=david@redhat.com \
--cc=edgar.iglesias@amd.com \
--cc=peterx@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=sstabellini@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).