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charset="utf-8" Signed-off-by: Clement Mathieu--Drif --- hw/i386/intel_iommu.c | 55 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 4e7ad3a290..d952ec1428 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -3386,6 +3386,27 @@ static void vtd_handle_iectl_write(IntelIOMMUState *= s) } } =20 +static void vtd_handle_prs_write(IntelIOMMUState *s) +{ + uint32_t prs =3D vtd_get_long_raw(s, DMAR_PRS_REG); + if (!(prs & VTD_PR_STATUS_PPR) && !(prs & VTD_PR_STATUS_PRO)) { + vtd_set_clear_mask_long(s, DMAR_PECTL_REG, VTD_PR_PECTL_IP, 0); + } +} + +static void vtd_handle_pectl_write(IntelIOMMUState *s) +{ + uint32_t pectl =3D vtd_get_long_raw(s, DMAR_PECTL_REG); + if ((pectl & VTD_PR_PECTL_IP) && !(pectl & VTD_PR_PECTL_IM)) { + /* + * If IP field was 1 when software clears the IM field, + * the interrupt is generated along with clearing the IP field. + */ + vtd_set_clear_mask_long(s, DMAR_PECTL_REG, VTD_PR_PECTL_IP, 0); + vtd_generate_interrupt(s, DMAR_PEADDR_REG, DMAR_PEDATA_REG); + } +} + static uint64_t vtd_mem_read(void *opaque, hwaddr addr, unsigned size) { IntelIOMMUState *s =3D opaque; @@ -3428,6 +3449,11 @@ static uint64_t vtd_mem_read(void *opaque, hwaddr ad= dr, unsigned size) val =3D s->iq >> 32; break; =20 + case DMAR_PEUADDR_REG: + assert(size =3D=3D 4); + val =3D vtd_get_long_raw(s, DMAR_PEUADDR_REG); + break; + default: if (size =3D=3D 4) { val =3D vtd_get_long(s, addr); @@ -3491,6 +3517,11 @@ static void vtd_mem_write(void *opaque, hwaddr addr, vtd_handle_iotlb_write(s); break; =20 + case DMAR_PEUADDR_REG: + assert(size =3D=3D 4); + vtd_set_long(s, addr, val); + break; + /* Invalidate Address Register, 64-bit */ case DMAR_IVA_REG: if (size =3D=3D 4) { @@ -3671,6 +3702,18 @@ static void vtd_mem_write(void *opaque, hwaddr addr, vtd_set_long(s, addr, val); break; =20 + case DMAR_PRS_REG: + assert(size =3D=3D 4); + vtd_set_long(s, addr, val); + vtd_handle_prs_write(s); + break; + + case DMAR_PECTL_REG: + assert(size =3D=3D 4); + vtd_set_long(s, addr, val); + vtd_handle_pectl_write(s); + break; + default: if (size =3D=3D 4) { vtd_set_long(s, addr, val); @@ -4722,6 +4765,18 @@ static void vtd_init(IntelIOMMUState *s) * Interrupt remapping registers. */ vtd_define_quad(s, DMAR_IRTA_REG, 0, 0xfffffffffffff80fULL, 0); + + /* Page request registers */ + if (s->ecap & VTD_ECAP_PRS) { + vtd_define_quad(s, DMAR_PQH_REG, 0, 0x7ffe0ULL, 0); + vtd_define_quad(s, DMAR_PQT_REG, 0, 0x7ffe0ULL, 0); + vtd_define_quad(s, DMAR_PQA_REG, 0, 0xfffffffffffff007ULL, 0); + vtd_define_long(s, DMAR_PRS_REG, 0, 0, 0x3UL); + vtd_define_long(s, DMAR_PECTL_REG, 0, 0x80000000UL, 0); + vtd_define_long(s, DMAR_PEDATA_REG, 0, 0xffffUL, 0); + vtd_define_long(s, DMAR_PEADDR_REG, 0, 0xfffffffcUL, 0); + vtd_define_long(s, DMAR_PEUADDR_REG, 0, 0xffffffffUL, 0); + } } =20 /* Should not reset address_spaces when reset because devices will still u= se --=20 2.51.0