From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: laurent@vivier.eu, alex.bennee@linaro.org,
"Philippe Mathieu-Daudé" <philmd@linaro.org>
Subject: [PATCH v2 29/33] linux-user: Allow TARGET_PAGE_BITS_VARY
Date: Thu, 31 Aug 2023 19:23:27 -0700 [thread overview]
Message-ID: <20230901022331.115247-30-richard.henderson@linaro.org> (raw)
In-Reply-To: <20230901022331.115247-1-richard.henderson@linaro.org>
If set, match the host and guest page sizes.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/main.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 3dd3310331..2334d7cc67 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -55,6 +55,7 @@
#include "loader.h"
#include "user-mmap.h"
#include "accel/tcg/perf.h"
+#include "exec/page-vary.h"
#ifdef CONFIG_SEMIHOSTING
#include "semihosting/semihost.h"
@@ -683,6 +684,7 @@ int main(int argc, char **argv, char **envp)
int i;
int ret;
int execfd;
+ int host_page_size;
unsigned long max_reserved_va;
bool preserve_argv0;
@@ -794,6 +796,16 @@ int main(int argc, char **argv, char **envp)
opt_one_insn_per_tb, &error_abort);
ac->init_machine(NULL);
}
+
+ /*
+ * Finalize page size before creating CPUs.
+ * This will do nothing if !TARGET_PAGE_BITS_VARY.
+ * The most efficient setting is to match the host.
+ */
+ host_page_size = qemu_real_host_page_size();
+ set_preferred_target_page_bits(ctz32(host_page_size));
+ finalize_target_page_bits();
+
cpu = cpu_create(cpu_type);
env = cpu->env_ptr;
cpu_reset(cpu);
@@ -807,8 +819,6 @@ int main(int argc, char **argv, char **envp)
*/
max_reserved_va = MAX_RESERVED_VA(cpu);
if (reserved_va != 0) {
- int host_page_size = qemu_real_host_page_size();
-
if ((reserved_va + 1) % host_page_size) {
char *s = size_to_str(host_page_size);
fprintf(stderr, "Reserved virtual address not aligned mod %s\n", s);
@@ -907,7 +917,7 @@ int main(int argc, char **argv, char **envp)
* If we're in a chroot with no /proc, fall back to 1 page.
*/
if (mmap_min_addr == 0) {
- mmap_min_addr = qemu_real_host_page_size();
+ mmap_min_addr = host_page_size;
qemu_log_mask(CPU_LOG_PAGE,
"host mmap_min_addr=0x%lx (fallback)\n",
mmap_min_addr);
--
2.34.1
next prev parent reply other threads:[~2023-09-01 2:27 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 ` [PATCH v2 01/33] accel/tcg: Remove qemu_host_page_size from page_protect/page_unprotect Richard Henderson
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 ` Richard Henderson [this message]
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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