From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-arm@nongnu.org, qemu-devel@nongnu.org
Cc: patches@linaro.org
Subject: [Qemu-devel] [PATCH] target/arm: Implement HACR_EL2
Date: Tue, 5 Feb 2019 18:12:18 +0000 [thread overview]
Message-ID: <20190205181218.8995-1-peter.maydell@linaro.org> (raw)
HACR_EL2 is a register with IMPDEF behaviour, which allows
implementation specific trapping to EL2. Implement it as RAZ/WI,
since QEMU's implementation has no extra traps. This also
matches what h/w implementations like Cortex-A53 and A57 do.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
target/arm/helper.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index d070879894c..f09f815578e 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4434,6 +4434,9 @@ static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = {
.opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL2_RW,
.type = ARM_CP_CONST, .resetvalue = 0 },
+ { .name = "HACR_EL2", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 7,
+ .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "ESR_EL2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 4, .crn = 5, .crm = 2, .opc2 = 0,
.access = PL2_RW,
@@ -4666,6 +4669,9 @@ static const ARMCPRegInfo el2_cp_reginfo[] = {
.cp = 15, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.hcr_el2),
.writefn = hcr_writelow },
+ { .name = "HACR_EL2", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 7,
+ .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "ELR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 1,
--
2.20.1
next reply other threads:[~2019-02-05 18:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-05 18:12 Peter Maydell [this message]
2019-02-06 3:24 ` [Qemu-devel] [PATCH] target/arm: Implement HACR_EL2 Richard Henderson
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