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[Qemu-devel] [PULL 17/27] target-arm: Add support for AArch32 S2 negativ
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 17/27] target-arm: Add support for AArch32 S2 negative t0sz |
Date: |
Tue, 27 Oct 2015 14:33:19 +0000 |
From: "Edgar E. Iglesias" <address@hidden>
Add support for AArch32 S2 negative t0sz. In preparation for
using 40bit IPAs on AArch32.
Signed-off-by: Edgar E. Iglesias <address@hidden>
Message-id: address@hidden
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/helper.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 0086feb..d2f035f 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -6536,10 +6536,26 @@ static bool get_phys_addr_lpae(CPUARMState *env,
target_ulong address,
* This is a Non-secure PL0/1 stage 1 translation, so controlled by
* TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
*/
- t0sz = extract32(tcr->raw_tcr, 0, 6);
if (va_size == 64) {
+ /* AArch64 translation. */
+ t0sz = extract32(tcr->raw_tcr, 0, 6);
t0sz = MIN(t0sz, 39);
t0sz = MAX(t0sz, 16);
+ } else if (mmu_idx != ARMMMUIdx_S2NS) {
+ /* AArch32 stage 1 translation. */
+ t0sz = extract32(tcr->raw_tcr, 0, 3);
+ } else {
+ /* AArch32 stage 2 translation. */
+ bool sext = extract32(tcr->raw_tcr, 4, 1);
+ bool sign = extract32(tcr->raw_tcr, 3, 1);
+ t0sz = sextract32(tcr->raw_tcr, 0, 4);
+
+ /* If the sign-extend bit is not the same as t0sz[3], the result
+ * is unpredictable. Flag this as a guest error. */
+ if (sign != sext) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "AArch32: VTCR.S / VTCR.T0SZ[3] missmatch\n");
+ }
}
t1sz = extract32(tcr->raw_tcr, 16, 6);
if (va_size == 64) {
--
1.9.1
- [Qemu-devel] [PULL 00/27] target-arm queue, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 25/27] target-arm: Add S2 translation to 32bit S1 PTWs, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 17/27] target-arm: Add support for AArch32 S2 negative t0sz,
Peter Maydell <=
- [Qemu-devel] [PULL 26/27] target-arm: Route S2 MMU faults to EL2, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 14/27] target-arm: Add HPFAR_EL2, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 13/27] i.MX: Standardize i.MX GPT debug, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 19/27] target-arm: lpae: Rename granule_sz to stride, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 23/27] target-arm: Add ARMMMUFaultInfo, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 24/27] target-arm: Add S2 translation to 64bit S1 PTWs, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 16/27] target-arm: lpae: Move declaration of t0sz and t1sz, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 21/27] target-arm: Add support for S2 page-table protection bits, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 20/27] target-arm: Add computation of starting level for S2 PTW, Peter Maydell, 2015/10/27
- [Qemu-devel] [PULL 01/27] target-arm: Fix "no 64-bit EL2" assumption in arm_excp_unmasked(), Peter Maydell, 2015/10/27