From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: laurent@vivier.eu, alex.bennee@linaro.org
Subject: [PATCH v2 01/33] accel/tcg: Remove qemu_host_page_size from page_protect/page_unprotect
Date: Thu, 31 Aug 2023 19:22:59 -0700 [thread overview]
Message-ID: <20230901022331.115247-2-richard.henderson@linaro.org> (raw)
In-Reply-To: <20230901022331.115247-1-richard.henderson@linaro.org>
Use qemu_real_host_page_size instead. Except for the final mprotect
within page_protect, we already handled host < target page size.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
accel/tcg/user-exec.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index ab48cb41e4..4c1697500a 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -650,16 +650,17 @@ void page_protect(tb_page_addr_t address)
{
PageFlagsNode *p;
target_ulong start, last;
+ int host_page_size = qemu_real_host_page_size();
int prot;
assert_memory_lock();
- if (qemu_host_page_size <= TARGET_PAGE_SIZE) {
+ if (host_page_size <= TARGET_PAGE_SIZE) {
start = address & TARGET_PAGE_MASK;
last = start + TARGET_PAGE_SIZE - 1;
} else {
- start = address & qemu_host_page_mask;
- last = start + qemu_host_page_size - 1;
+ start = address & -host_page_size;
+ last = start + host_page_size - 1;
}
p = pageflags_find(start, last);
@@ -670,7 +671,7 @@ void page_protect(tb_page_addr_t address)
if (unlikely(p->itree.last < last)) {
/* More than one protection region covers the one host page. */
- assert(TARGET_PAGE_SIZE < qemu_host_page_size);
+ assert(TARGET_PAGE_SIZE < host_page_size);
while ((p = pageflags_next(p, start, last)) != NULL) {
prot |= p->flags;
}
@@ -678,7 +679,7 @@ void page_protect(tb_page_addr_t address)
if (prot & PAGE_WRITE) {
pageflags_set_clear(start, last, 0, PAGE_WRITE);
- mprotect(g2h_untagged(start), qemu_host_page_size,
+ mprotect(g2h_untagged(start), last - start + 1,
prot & (PAGE_READ | PAGE_EXEC) ? PROT_READ : PROT_NONE);
}
}
@@ -724,18 +725,19 @@ int page_unprotect(target_ulong address, uintptr_t pc)
}
#endif
} else {
+ int host_page_size = qemu_real_host_page_size();
target_ulong start, len, i;
int prot;
- if (qemu_host_page_size <= TARGET_PAGE_SIZE) {
+ if (host_page_size <= TARGET_PAGE_SIZE) {
start = address & TARGET_PAGE_MASK;
len = TARGET_PAGE_SIZE;
prot = p->flags | PAGE_WRITE;
pageflags_set_clear(start, start + len - 1, PAGE_WRITE, 0);
current_tb_invalidated = tb_invalidate_phys_page_unwind(start, pc);
} else {
- start = address & qemu_host_page_mask;
- len = qemu_host_page_size;
+ start = address & -host_page_size;
+ len = host_page_size;
prot = 0;
for (i = 0; i < len; i += TARGET_PAGE_SIZE) {
--
2.34.1
next prev parent reply other threads:[~2023-09-01 2:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-01 2:22 [PATCH v2 00/33] linux-user: Improve host and guest page size handling Richard Henderson
2023-09-01 2:22 ` Richard Henderson [this message]
2023-09-01 2:23 ` [PATCH v2 02/33] linux-user: Adjust SVr4 NULL page mapping Richard Henderson
2023-09-01 2:23 ` [PATCH v2 03/33] linux-user: Remove qemu_host_page_{size, mask} in probe_guest_base Richard Henderson
2023-09-01 2:23 ` [PATCH v2 04/33] linux-user: Remove qemu_host_page_size from create_elf_tables Richard Henderson
2023-09-01 2:23 ` [PATCH v2 05/33] linux-user/hppa: Simplify init_guest_commpage Richard Henderson
2023-09-01 2:23 ` [PATCH v2 06/33] linux-user/nios2: Remove qemu_host_page_size from init_guest_commpage Richard Henderson
2023-09-01 2:23 ` [PATCH v2 07/33] linux-user/arm: " Richard Henderson
2023-09-01 2:23 ` [PATCH v2 08/33] linux-user: Remove qemu_host_page_{size, mask} from mmap.c Richard Henderson
2023-09-01 2:23 ` [PATCH v2 09/33] linux-user: Remove REAL_HOST_PAGE_ALIGN " Richard Henderson
2023-09-01 2:23 ` [PATCH v2 10/33] linux-user: Remove HOST_PAGE_ALIGN " Richard Henderson
2023-09-01 2:23 ` [PATCH v2 11/33] migration: Remove qemu_host_page_size Richard Henderson
2023-09-01 2:23 ` [PATCH v2 12/33] hw/tpm: Remove HOST_PAGE_ALIGN from tpm_ppi_init Richard Henderson
2023-09-01 2:23 ` [PATCH v2 13/33] softmmu/physmem: Remove qemu_host_page_size Richard Henderson
2023-09-01 2:23 ` [PATCH v2 14/33] softmmu/physmem: Remove HOST_PAGE_ALIGN Richard Henderson
2023-09-01 2:23 ` [PATCH v2 15/33] linux-user: Remove qemu_host_page_size from main Richard Henderson
2023-09-01 2:23 ` [PATCH v2 16/33] linux-user: Split out target_mmap__locked Richard Henderson
2023-09-01 2:23 ` [PATCH v2 17/33] linux-user: Move some mmap checks outside the lock Richard Henderson
2023-09-01 2:23 ` [PATCH v2 18/33] linux-user: Fix sub-host-page mmap Richard Henderson
2023-09-01 2:23 ` [PATCH v2 19/33] linux-user: Split out mmap_end Richard Henderson
2023-09-01 2:23 ` [PATCH v2 20/33] linux-user: Do early mmap placement only for reserved_va Richard Henderson
2023-09-01 2:23 ` [PATCH v2 21/33] linux-user: Split out mmap_h_eq_g Richard Henderson
2023-09-01 2:23 ` [PATCH v2 22/33] linux-user: Split out mmap_h_lt_g Richard Henderson
2023-09-01 2:23 ` [PATCH v2 23/33] linux-user: Split out mmap_h_gt_g Richard Henderson
2023-09-01 2:23 ` [PATCH v2 24/33] tests/tcg: Remove run-test-mmap-* Richard Henderson
2023-09-01 2:23 ` [PATCH v2 25/33] tests/tcg: Extend file in linux-madvise.c Richard Henderson
2023-09-01 2:23 ` [PATCH v2 26/33] *-user: Deprecate and disable -p pagesize Richard Henderson
2023-09-01 2:26 ` Warner Losh
2023-09-01 2:23 ` [PATCH v2 27/33] cpu: Remove page_size_init Richard Henderson
2023-09-01 2:31 ` Warner Losh
2023-09-01 2:23 ` [PATCH v2 28/33] accel/tcg: Disconnect TargetPageDataNode from page size Richard Henderson
2023-09-01 2:23 ` [PATCH v2 29/33] linux-user: Allow TARGET_PAGE_BITS_VARY Richard Henderson
2023-09-01 2:23 ` [PATCH v2 30/33] target/arm: Enable TARGET_PAGE_BITS_VARY for AArch64 user-only Richard Henderson
2023-09-01 2:23 ` [PATCH v2 31/33] linux-user: Bound mmap_min_addr by host page size Richard Henderson
2023-09-01 2:23 ` [PATCH v2 32/33] target/ppc: Enable TARGET_PAGE_BITS_VARY for user-only Richard Henderson
2023-09-01 2:23 ` [PATCH v2 33/33] target/alpha: " Richard Henderson
2023-09-29 1:05 ` [PATCH v2 00/33] linux-user: Improve host and guest page size handling Richard Henderson
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