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Diffstat (limited to 'arch/arm64/kvm/sys_regs.c')
-rw-r--r--arch/arm64/kvm/sys_regs.c54
1 files changed, 49 insertions, 5 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index a4363735d3f8..22fbbdbece3c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -194,7 +194,16 @@ static bool access_dcsw(struct kvm_vcpu *vcpu,
if (!p->is_write)
return read_from_write_only(vcpu, p, r);
- kvm_set_way_flush(vcpu);
+ /*
+ * Only track S/W ops if we don't have FWB. It still indicates
+ * that the guest is a bit broken (S/W operations should only
+ * be done by firmware, knowing that there is only a single
+ * CPU left in the system, and certainly not from non-secure
+ * software).
+ */
+ if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))
+ kvm_set_way_flush(vcpu);
+
return true;
}
@@ -243,10 +252,43 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
struct sys_reg_params *p,
const struct sys_reg_desc *r)
{
+ bool g1;
+
if (!p->is_write)
return read_from_write_only(vcpu, p, r);
- vgic_v3_dispatch_sgi(vcpu, p->regval);
+ /*
+ * In a system where GICD_CTLR.DS=1, a ICC_SGI0R_EL1 access generates
+ * Group0 SGIs only, while ICC_SGI1R_EL1 can generate either group,
+ * depending on the SGI configuration. ICC_ASGI1R_EL1 is effectively
+ * equivalent to ICC_SGI0R_EL1, as there is no "alternative" secure
+ * group.
+ */
+ if (p->is_aarch32) {
+ switch (p->Op1) {
+ default: /* Keep GCC quiet */
+ case 0: /* ICC_SGI1R */
+ g1 = true;
+ break;
+ case 1: /* ICC_ASGI1R */
+ case 2: /* ICC_SGI0R */
+ g1 = false;
+ break;
+ }
+ } else {
+ switch (p->Op2) {
+ default: /* Keep GCC quiet */
+ case 5: /* ICC_SGI1R_EL1 */
+ g1 = true;
+ break;
+ case 6: /* ICC_ASGI1R_EL1 */
+ case 7: /* ICC_SGI0R_EL1 */
+ g1 = false;
+ break;
+ }
+ }
+
+ vgic_v3_dispatch_sgi(vcpu, p->regval, g1);
return true;
}
@@ -1303,6 +1345,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
{ SYS_DESC(SYS_ICC_DIR_EL1), read_from_write_only },
{ SYS_DESC(SYS_ICC_RPR_EL1), write_to_read_only },
{ SYS_DESC(SYS_ICC_SGI1R_EL1), access_gic_sgi },
+ { SYS_DESC(SYS_ICC_ASGI1R_EL1), access_gic_sgi },
+ { SYS_DESC(SYS_ICC_SGI0R_EL1), access_gic_sgi },
{ SYS_DESC(SYS_ICC_IAR1_EL1), write_to_read_only },
{ SYS_DESC(SYS_ICC_EOIR1_EL1), read_from_write_only },
{ SYS_DESC(SYS_ICC_HPPIR1_EL1), write_to_read_only },
@@ -1613,8 +1657,6 @@ static const struct sys_reg_desc cp14_64_regs[] = {
* register).
*/
static const struct sys_reg_desc cp15_regs[] = {
- { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi },
-
{ Op1( 0), CRn( 1), CRm( 0), Op2( 0), access_vm_reg, NULL, c1_SCTLR },
{ Op1( 0), CRn( 2), CRm( 0), Op2( 0), access_vm_reg, NULL, c2_TTBR0 },
{ Op1( 0), CRn( 2), CRm( 0), Op2( 1), access_vm_reg, NULL, c2_TTBR1 },
@@ -1737,8 +1779,10 @@ static const struct sys_reg_desc cp15_regs[] = {
static const struct sys_reg_desc cp15_64_regs[] = {
{ Op1( 0), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR0 },
{ Op1( 0), CRn( 0), CRm( 9), Op2( 0), access_pmu_evcntr },
- { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi },
+ { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_SGI1R */
{ Op1( 1), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR1 },
+ { Op1( 1), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_ASGI1R */
+ { Op1( 2), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_SGI0R */
{ Op1( 2), CRn( 0), CRm(14), Op2( 0), access_cntp_cval },
};