From: Tony Nguyen <tony.nguyen@bt.com>
To: qemu-devel@nongnu.org
Cc: Tony Nguyen <tony.nguyen@bt.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Richard Henderson <rth@twiddle.net>
Subject: [Qemu-devel] [PATCH v9 17/20] cpu: TLB_FLAGS_MASK bit to force memory slow path
Date: Sat, 24 Aug 2019 04:36:55 +1000 [thread overview]
Message-ID: <4b71fd52ebd39e3122f8b702b53ecb04f6af4c26.1566466906.git.tony.nguyen@bt.com> (raw)
In-Reply-To: <cover.1566466906.git.tony.nguyen@bt.com>
The fast path is taken when TLB_FLAGS_MASK is all zero.
TLB_FORCE_SLOW is simply a TLB_FLAGS_MASK bit to force the slow path,
there are no other side effects.
Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
include/exec/cpu-all.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index 536ea58f81..e496f9900f 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -331,12 +331,18 @@ CPUArchState *cpu_copy(CPUArchState *env);
#define TLB_MMIO (1 << (TARGET_PAGE_BITS - 3))
/* Set if TLB entry must have MMU lookup repeated for every access */
#define TLB_RECHECK (1 << (TARGET_PAGE_BITS - 4))
+/* Set if TLB entry must take the slow path. */
+#define TLB_FORCE_SLOW (1 << (TARGET_PAGE_BITS - 5))
/* Use this mask to check interception with an alignment mask
* in a TCG backend.
*/
-#define TLB_FLAGS_MASK (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \
- | TLB_RECHECK)
+#define TLB_FLAGS_MASK \
+ (TLB_INVALID_MASK \
+ | TLB_NOTDIRTY \
+ | TLB_MMIO \
+ | TLB_RECHECK \
+ | TLB_FORCE_SLOW)
/**
* tlb_hit_page: return true if page aligned @addr is a hit against the
--
2.23.0
next prev parent reply other threads:[~2019-08-23 18:50 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 1:19 [Qemu-devel] [PATCH v9 00/20] Invert Endian bit in SPARCv9 MMU TTE Tony Nguyen
2019-08-23 1:02 ` Tony Nguyen
2019-08-23 2:29 ` Richard Henderson
2019-08-23 12:25 ` tony.nguyen
2019-08-23 16:46 ` Richard Henderson
2019-08-23 18:51 ` Richard Henderson
2019-08-23 18:10 ` [Qemu-devel] [PATCH v9 01/20] tcg: TCGMemOp is now accelerator independent MemOp Tony Nguyen
2019-08-23 18:29 ` [Qemu-devel] [PATCH v9 02/20] memory: Introduce size_memop Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 03/20] target/mips: Access MemoryRegion with MemOp Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 04/20] hw/s390x: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 05/20] hw/intc/armv7m_nic: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 06/20] hw/virtio: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 07/20] hw/vfio: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 08/20] exec: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 09/20] cputlb: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 10/20] memory: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 11/20] hw/s390x: Hard code size with MO_{8|16|32|64} Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 12/20] target/mips: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 13/20] exec: " Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 14/20] memory: Access MemoryRegion with endianness Tony Nguyen
2019-08-23 19:04 ` Richard Henderson
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 15/20] cputlb: Replace size and endian operands for MemOp Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 16/20] memory: Single byte swap along the I/O path Tony Nguyen
2019-08-23 19:12 ` Richard Henderson
2019-08-23 18:36 ` Tony Nguyen [this message]
2019-08-23 22:27 ` [Qemu-devel] [PATCH v9 17/20] cpu: TLB_FLAGS_MASK bit to force memory slow path Richard Henderson
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 18/20] cputlb: Byte swap memory transaction attribute Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 19/20] target/sparc: Add TLB entry with attributes Tony Nguyen
2019-08-23 18:36 ` [Qemu-devel] [PATCH v9 20/20] target/sparc: sun4u Invert Endian TTE bit Tony Nguyen
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