From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: laurent@vivier.eu, alex.bennee@linaro.org
Subject: [PATCH v2 30/33] target/arm: Enable TARGET_PAGE_BITS_VARY for AArch64 user-only
Date: Thu, 31 Aug 2023 19:23:28 -0700 [thread overview]
Message-ID: <20230901022331.115247-31-richard.henderson@linaro.org> (raw)
In-Reply-To: <20230901022331.115247-1-richard.henderson@linaro.org>
Since aarch64 binaries are generally built for multiple
page sizes, it is trivial to allow the page size to vary.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu-param.h | 6 ++++-
target/arm/cpu.c | 51 ++++++++++++++++++++++++------------------
2 files changed, 34 insertions(+), 23 deletions(-)
diff --git a/target/arm/cpu-param.h b/target/arm/cpu-param.h
index b3b35f7aa1..7585a810b2 100644
--- a/target/arm/cpu-param.h
+++ b/target/arm/cpu-param.h
@@ -19,9 +19,13 @@
#endif
#ifdef CONFIG_USER_ONLY
-#define TARGET_PAGE_BITS 12
# ifdef TARGET_AARCH64
# define TARGET_TAGGED_ADDRESSES
+/* Allow user-only to vary page size from 4k */
+# define TARGET_PAGE_BITS_VARY
+# define TARGET_PAGE_BITS_MIN 12
+# else
+# define TARGET_PAGE_BITS 12
# endif
#else
/*
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 0bb0585441..de2a90e23d 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1677,7 +1677,6 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
ARMCPU *cpu = ARM_CPU(dev);
ARMCPUClass *acc = ARM_CPU_GET_CLASS(dev);
CPUARMState *env = &cpu->env;
- int pagebits;
Error *local_err = NULL;
/* Use pc-relative instructions in system-mode */
@@ -1968,28 +1967,36 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
!cpu_isar_feature(aa32_vfp_simd, cpu) ||
!arm_feature(env, ARM_FEATURE_XSCALE));
- if (arm_feature(env, ARM_FEATURE_V7) &&
- !arm_feature(env, ARM_FEATURE_M) &&
- !arm_feature(env, ARM_FEATURE_PMSA)) {
- /* v7VMSA drops support for the old ARMv5 tiny pages, so we
- * can use 4K pages.
- */
- pagebits = 12;
- } else {
- /* For CPUs which might have tiny 1K pages, or which have an
- * MPU and might have small region sizes, stick with 1K pages.
- */
- pagebits = 10;
- }
- if (!set_preferred_target_page_bits(pagebits)) {
- /* This can only ever happen for hotplugging a CPU, or if
- * the board code incorrectly creates a CPU which it has
- * promised via minimum_page_size that it will not.
- */
- error_setg(errp, "This CPU requires a smaller page size than the "
- "system is using");
- return;
+#ifndef CONFIG_USER_ONLY
+ {
+ int pagebits;
+ if (arm_feature(env, ARM_FEATURE_V7) &&
+ !arm_feature(env, ARM_FEATURE_M) &&
+ !arm_feature(env, ARM_FEATURE_PMSA)) {
+ /*
+ * v7VMSA drops support for the old ARMv5 tiny pages,
+ * so we can use 4K pages.
+ */
+ pagebits = 12;
+ } else {
+ /*
+ * For CPUs which might have tiny 1K pages, or which have an
+ * MPU and might have small region sizes, stick with 1K pages.
+ */
+ pagebits = 10;
+ }
+ if (!set_preferred_target_page_bits(pagebits)) {
+ /*
+ * This can only ever happen for hotplugging a CPU, or if
+ * the board code incorrectly creates a CPU which it has
+ * promised via minimum_page_size that it will not.
+ */
+ error_setg(errp, "This CPU requires a smaller page size "
+ "than the system is using");
+ return;
+ }
}
+#endif
/* This cpu-id-to-MPIDR affinity is used only for TCG; KVM will override it.
* We don't support setting cluster ID ([16..23]) (known as Aff2
--
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 ` [PATCH v2 29/33] linux-user: Allow TARGET_PAGE_BITS_VARY Richard Henderson
2023-09-01 2:23 ` Richard Henderson [this message]
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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