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[PATCH v4 25/40] target/arm: Update timer access for VHE
From: |
Richard Henderson |
Subject: |
[PATCH v4 25/40] target/arm: Update timer access for VHE |
Date: |
Mon, 2 Dec 2019 18:29:22 -0800 |
Signed-off-by: Richard Henderson <address@hidden>
---
target/arm/helper.c | 102 +++++++++++++++++++++++++++++++++++---------
1 file changed, 81 insertions(+), 21 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index a4a7f82661..023b8963cf 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -2287,10 +2287,18 @@ static CPAccessResult gt_cntfrq_access(CPUARMState
*env, const ARMCPRegInfo *ri,
* Writable only at the highest implemented exception level.
*/
int el = arm_current_el(env);
+ uint64_t hcr;
+ uint32_t cntkctl;
switch (el) {
case 0:
- if (!extract32(env->cp15.c14_cntkctl, 0, 2)) {
+ hcr = arm_hcr_el2_eff(env);
+ if ((hcr & (HCR_E2H | HCR_TGE)) == (HCR_E2H | HCR_TGE)) {
+ cntkctl = env->cp15.cnthctl_el2;
+ } else {
+ cntkctl = env->cp15.c14_cntkctl;
+ }
+ if (!extract32(cntkctl, 0, 2)) {
return CP_ACCESS_TRAP;
}
break;
@@ -2318,17 +2326,47 @@ static CPAccessResult gt_counter_access(CPUARMState
*env, int timeridx,
{
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
+ uint64_t hcr = arm_hcr_el2_eff(env);
- /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
- if (cur_el == 0 &&
- !extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
- return CP_ACCESS_TRAP;
- }
+ switch (cur_el) {
+ case 0:
+ /* If HCR_EL2.<E2H,TGE> == '11': check CNTHCTL_EL2.EL0[PV]CTEN. */
+ if ((hcr & (HCR_E2H | HCR_TGE)) == (HCR_E2H | HCR_TGE)) {
+ return (extract32(env->cp15.cnthctl_el2, timeridx, 1)
+ ? CP_ACCESS_OK : CP_ACCESS_TRAP_EL2);
+ }
- if (arm_feature(env, ARM_FEATURE_EL2) &&
- timeridx == GTIMER_PHYS && !secure && cur_el < 2 &&
- !extract32(env->cp15.cnthctl_el2, 0, 1)) {
- return CP_ACCESS_TRAP_EL2;
+ /* CNT[PV]CT: not visible from PL0 if EL0[PV]CTEN is zero */
+ if (!extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
+ return CP_ACCESS_TRAP;
+ }
+
+ /* If HCR_EL2.<E2H,TGE> == '10': check CNTHCTL_EL2.EL1PCTEN. */
+ if (hcr & HCR_E2H) {
+ if (timeridx == GTIMER_PHYS &&
+ !extract32(env->cp15.cnthctl_el2, 10, 1)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ } else {
+ /* If HCR_EL2.<E2H> == 0: check CNTHCTL_EL2.EL1PCEN. */
+ if (arm_feature(env, ARM_FEATURE_EL2) &&
+ timeridx == GTIMER_PHYS && !secure &&
+ !extract32(env->cp15.cnthctl_el2, 1, 1)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ }
+ break;
+
+ case 1:
+ /* Check CNTHCTL_EL2.EL1PCTEN, which changes location based on E2H. */
+ if (arm_feature(env, ARM_FEATURE_EL2) &&
+ timeridx == GTIMER_PHYS && !secure &&
+ (hcr & HCR_E2H
+ ? !extract32(env->cp15.cnthctl_el2, 10, 1)
+ : !extract32(env->cp15.cnthctl_el2, 0, 1))) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ break;
}
return CP_ACCESS_OK;
}
@@ -2338,19 +2376,41 @@ static CPAccessResult gt_timer_access(CPUARMState *env,
int timeridx,
{
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
+ uint64_t hcr = arm_hcr_el2_eff(env);
- /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
- * EL0[PV]TEN is zero.
- */
- if (cur_el == 0 &&
- !extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
- return CP_ACCESS_TRAP;
- }
+ switch (cur_el) {
+ case 0:
+ if ((hcr & (HCR_E2H | HCR_TGE)) == (HCR_E2H | HCR_TGE)) {
+ /* If HCR_EL2.<E2H,TGE> == '11': check CNTHCTL_EL2.EL0[PV]TEN. */
+ return (extract32(env->cp15.cnthctl_el2, 9 - timeridx, 1)
+ ? CP_ACCESS_OK : CP_ACCESS_TRAP_EL2);
+ }
- if (arm_feature(env, ARM_FEATURE_EL2) &&
- timeridx == GTIMER_PHYS && !secure && cur_el < 2 &&
- !extract32(env->cp15.cnthctl_el2, 1, 1)) {
- return CP_ACCESS_TRAP_EL2;
+ /*
+ * CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from
+ * EL0 if EL0[PV]TEN is zero.
+ */
+ if (!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
+ return CP_ACCESS_TRAP;
+ }
+ /* fall through */
+
+ case 1:
+ if (arm_feature(env, ARM_FEATURE_EL2) &&
+ timeridx == GTIMER_PHYS && !secure) {
+ if (hcr & HCR_E2H) {
+ /* If HCR_EL2.<E2H,TGE> == '10': check CNTHCTL_EL2.EL1PTEN. */
+ if (!extract32(env->cp15.cnthctl_el2, 11, 1)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ } else {
+ /* If HCR_EL2.<E2H> == 0: check CNTHCTL_EL2.EL1PCEN. */
+ if (!extract32(env->cp15.cnthctl_el2, 1, 1)) {
+ return CP_ACCESS_TRAP_EL2;
+ }
+ }
+ }
+ break;
}
return CP_ACCESS_OK;
}
--
2.17.1
- Re: [PATCH v4 27/40] target/arm: Add VHE system register redirection and aliasing, (continued)
[PATCH v4 18/40] target/arm: Reorganize ARMMMUIdx, Richard Henderson, 2019/12/02
[PATCH v4 32/40] target/arm: Update {fp,sve}_exception_el for VHE, Richard Henderson, 2019/12/02
[PATCH v4 40/40] target/arm: Raise only one interrupt in arm_cpu_exec_interrupt, Richard Henderson, 2019/12/02
[PATCH v4 39/40] target/arm: Use bool for unmasked in arm_excp_unmasked, Richard Henderson, 2019/12/02
[PATCH v4 25/40] target/arm: Update timer access for VHE,
Richard Henderson <=
[PATCH v4 28/40] target/arm: Add VHE timer register redirection and aliasing, Richard Henderson, 2019/12/02
[PATCH v4 33/40] target/arm: check TGE and E2H flags for EL0 pauth traps, Richard Henderson, 2019/12/02
[PATCH v4 37/40] target/arm: Move arm_excp_unmasked to cpu.c, Richard Henderson, 2019/12/02
[PATCH v4 31/40] target/arm: Update arm_phys_excp_target_el for TGE, Richard Henderson, 2019/12/02
[PATCH v4 35/40] target/arm: Update arm_cpu_do_interrupt_aarch64 for VHE, Richard Henderson, 2019/12/02