| Message ID | 167475645654.1386523.7101990863993668595.stgit@djiang5-mobl3.local (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/cxl: Add QTG _DSM support for ACPI0017 device | expand |
On 1/26/23 11:24 AM, Jonathan Cameron wrote: > On Thu, 26 Jan 2023 11:07:37 -0700 > Dave Jiang <dave.jiang@intel.com> wrote: > > Hi Dave, > > That was quick! > >> Add a simple _DSM call support for the ACPI0017 device to return a fake QTG >> ID value. Given the current CXL implementation does not involve switches, > > I don't follow. What part doesn't involve switches? The devices are just behind the CXL host-bridge right? Do you think we need to provide anything beyond the fake value right now? > >> a faked value of 0 can be returned for the QTG ID. The enabling is for _DSM >> plumbing testing from the OS. > > Can you include a dump iasl -d for the DSDT chunk this generates. Much > easier to review with that available. Ok. Let me figure out how to do that. > > On that note, tests need updating I think > tests/qtest/bios-tables-test.c data which is in > tests/data/acpi/q35/DSDT.cxl ok > > We should update that test code as part of the volatile series as well > as it's using the deprecated memdev parameter - not critical > but never a good thing to leave old examples of what not to use in > the tests. > > Thanks, > > Jonathan > > p.s. I'm too lazy to look at the code without the AML to compare with > as I'll review the AML first then look at if there are any oddities > in the generation code. > >> >> Signed-off-by: Dave Jiang <dave.jiang@intel.com> >> --- >> hw/acpi/cxl.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ >> hw/i386/acpi-build.c | 1 + >> include/hw/acpi/cxl.h | 1 + >> 3 files changed, 59 insertions(+) >> >> diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c >> index 2bf8c0799359..cd6839c24416 100644 >> --- a/hw/acpi/cxl.c >> +++ b/hw/acpi/cxl.c >> @@ -30,6 +30,63 @@ >> #include "qapi/error.h" >> #include "qemu/uuid.h" >> >> +void build_cxl_dsm_method(Aml *dev) >> +{ >> + Aml *method, *ifctx, *ifctx2; >> + >> + method = aml_method("_DSM", 4, AML_SERIALIZED); >> + { >> + Aml *function, *uuid; >> + >> + uuid = aml_arg(0); >> + function = aml_arg(2); >> + /* CXL spec v3.0 9.17.3.1 *, QTG ID _DSM */ >> + ifctx = aml_if(aml_equal( >> + uuid, aml_touuid("F365F9A6-A7DE-4071-A66A-B40C0B4F8E52"))); >> + >> + /* Function 0, standard DSM query function */ >> + ifctx2 = aml_if(aml_equal(function, aml_int(0))); >> + { >> + uint8_t byte_list[1] = { 0x01 }; /* functions 1 only */ >> + >> + aml_append(ifctx2, >> + aml_return(aml_buffer(sizeof(byte_list), byte_list))); >> + } >> + aml_append(ifctx, ifctx2); >> + >> + /* >> + * Function 1 >> + * A return value of {1, {0}} inciate that >> + * max supported QTG ID of 1 and recommended QTG is 0. >> + * The values here are faked to simplify emulation. >> + */ >> + ifctx2 = aml_if(aml_equal(function, aml_int(1))); >> + { >> + uint16_t word_list[1] = { 0x01 }; >> + uint16_t word_list2[1] = { 0 }; >> + uint8_t *byte_list = (uint8_t *)word_list; >> + uint8_t *byte_list2 = (uint8_t *)word_list2; >> + Aml *pak, *pak1; >> + >> + /* >> + * The return package is a package of a WORD and another package. >> + * The embedded package contains 0 or more WORDs for the >> + * recommended QTG IDs. >> + */ >> + pak1 = aml_package(1); >> + aml_append(pak1, aml_buffer(sizeof(uint16_t), byte_list2)); >> + pak = aml_package(2); >> + aml_append(pak, aml_buffer(sizeof(uint16_t), byte_list)); >> + aml_append(pak, pak1); >> + >> + aml_append(ifctx2, aml_return(pak)); >> + } >> + aml_append(ifctx, ifctx2); >> + } >> + aml_append(method, ifctx); >> + aml_append(dev, method); >> +} >> + >> static void cedt_build_chbs(GArray *table_data, PXBDev *cxl) >> { >> SysBusDevice *sbd = SYS_BUS_DEVICE(cxl->cxl.cxl_host_bridge); >> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c >> index 285829802b1a..623f26a16db3 100644 >> --- a/hw/i386/acpi-build.c >> +++ b/hw/i386/acpi-build.c >> @@ -1313,6 +1313,7 @@ static void build_acpi0017(Aml *table) >> method = aml_method("_STA", 0, AML_NOTSERIALIZED); >> aml_append(method, aml_return(aml_int(0x01))); >> aml_append(dev, method); >> + build_cxl_dsm_method(dev); >> >> aml_append(scope, dev); >> aml_append(table, scope); >> diff --git a/include/hw/acpi/cxl.h b/include/hw/acpi/cxl.h >> index acf441888683..8f22c71530d8 100644 >> --- a/include/hw/acpi/cxl.h >> +++ b/include/hw/acpi/cxl.h >> @@ -25,5 +25,6 @@ void cxl_build_cedt(GArray *table_offsets, GArray *table_data, >> BIOSLinker *linker, const char *oem_id, >> const char *oem_table_id, CXLState *cxl_state); >> void build_cxl_osc_method(Aml *dev); >> +void build_cxl_dsm_method(Aml *dev); >> >> #endif >> >> >
On 1/26/23 11:47 AM, Jonathan Cameron wrote: > On Thu, 26 Jan 2023 11:41:47 -0700 > Dave Jiang <dave.jiang@intel.com> wrote: > >> On 1/26/23 11:24 AM, Jonathan Cameron wrote: >>> On Thu, 26 Jan 2023 11:07:37 -0700 >>> Dave Jiang <dave.jiang@intel.com> wrote: >>> >>> Hi Dave, >>> >>> That was quick! >>> >>>> Add a simple _DSM call support for the ACPI0017 device to return a fake QTG >>>> ID value. Given the current CXL implementation does not involve switches, >>> >>> I don't follow. What part doesn't involve switches? >> >> The devices are just behind the CXL host-bridge right? Do you think we >> need to provide anything beyond the fake value right now? > > No problem with fake value. It was just the not involve switches statement. > Both kernel and QEMU support switches in general so I wasn't sure why > 'current' CXL implementation does not involve switches. Ok I'll remove the phrase. > >> >>> >>>> a faked value of 0 can be returned for the QTG ID. The enabling is for _DSM >>>> plumbing testing from the OS. >>> >>> Can you include a dump iasl -d for the DSDT chunk this generates. Much >>> easier to review with that available. >> >> Ok. Let me figure out how to do that. >> >>> >>> On that note, tests need updating I think >>> tests/qtest/bios-tables-test.c data which is in >>> tests/data/acpi/q35/DSDT.cxl >> >> ok >> >>> >>> We should update that test code as part of the volatile series as well >>> as it's using the deprecated memdev parameter - not critical >>> but never a good thing to leave old examples of what not to use in >>> the tests. >>> >>> Thanks, >>> >>> Jonathan >>> >>> p.s. I'm too lazy to look at the code without the AML to compare with >>> as I'll review the AML first then look at if there are any oddities >>> in the generation code. >>> >>>> >>>> Signed-off-by: Dave Jiang <dave.jiang@intel.com> >>>> --- >>>> hw/acpi/cxl.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ >>>> hw/i386/acpi-build.c | 1 + >>>> include/hw/acpi/cxl.h | 1 + >>>> 3 files changed, 59 insertions(+) >>>> >>>> diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c >>>> index 2bf8c0799359..cd6839c24416 100644 >>>> --- a/hw/acpi/cxl.c >>>> +++ b/hw/acpi/cxl.c >>>> @@ -30,6 +30,63 @@ >>>> #include "qapi/error.h" >>>> #include "qemu/uuid.h" >>>> >>>> +void build_cxl_dsm_method(Aml *dev) >>>> +{ >>>> + Aml *method, *ifctx, *ifctx2; >>>> + >>>> + method = aml_method("_DSM", 4, AML_SERIALIZED); >>>> + { >>>> + Aml *function, *uuid; >>>> + >>>> + uuid = aml_arg(0); >>>> + function = aml_arg(2); >>>> + /* CXL spec v3.0 9.17.3.1 *, QTG ID _DSM */ >>>> + ifctx = aml_if(aml_equal( >>>> + uuid, aml_touuid("F365F9A6-A7DE-4071-A66A-B40C0B4F8E52"))); >>>> + >>>> + /* Function 0, standard DSM query function */ >>>> + ifctx2 = aml_if(aml_equal(function, aml_int(0))); >>>> + { >>>> + uint8_t byte_list[1] = { 0x01 }; /* functions 1 only */ >>>> + >>>> + aml_append(ifctx2, >>>> + aml_return(aml_buffer(sizeof(byte_list), byte_list))); >>>> + } >>>> + aml_append(ifctx, ifctx2); >>>> + >>>> + /* >>>> + * Function 1 >>>> + * A return value of {1, {0}} inciate that >>>> + * max supported QTG ID of 1 and recommended QTG is 0. >>>> + * The values here are faked to simplify emulation. >>>> + */ >>>> + ifctx2 = aml_if(aml_equal(function, aml_int(1))); >>>> + { >>>> + uint16_t word_list[1] = { 0x01 }; >>>> + uint16_t word_list2[1] = { 0 }; >>>> + uint8_t *byte_list = (uint8_t *)word_list; >>>> + uint8_t *byte_list2 = (uint8_t *)word_list2; >>>> + Aml *pak, *pak1; >>>> + >>>> + /* >>>> + * The return package is a package of a WORD and another package. >>>> + * The embedded package contains 0 or more WORDs for the >>>> + * recommended QTG IDs. >>>> + */ >>>> + pak1 = aml_package(1); >>>> + aml_append(pak1, aml_buffer(sizeof(uint16_t), byte_list2)); >>>> + pak = aml_package(2); >>>> + aml_append(pak, aml_buffer(sizeof(uint16_t), byte_list)); >>>> + aml_append(pak, pak1); >>>> + >>>> + aml_append(ifctx2, aml_return(pak)); >>>> + } >>>> + aml_append(ifctx, ifctx2); >>>> + } >>>> + aml_append(method, ifctx); >>>> + aml_append(dev, method); >>>> +} >>>> + >>>> static void cedt_build_chbs(GArray *table_data, PXBDev *cxl) >>>> { >>>> SysBusDevice *sbd = SYS_BUS_DEVICE(cxl->cxl.cxl_host_bridge); >>>> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c >>>> index 285829802b1a..623f26a16db3 100644 >>>> --- a/hw/i386/acpi-build.c >>>> +++ b/hw/i386/acpi-build.c >>>> @@ -1313,6 +1313,7 @@ static void build_acpi0017(Aml *table) >>>> method = aml_method("_STA", 0, AML_NOTSERIALIZED); >>>> aml_append(method, aml_return(aml_int(0x01))); >>>> aml_append(dev, method); >>>> + build_cxl_dsm_method(dev); >>>> >>>> aml_append(scope, dev); >>>> aml_append(table, scope); >>>> diff --git a/include/hw/acpi/cxl.h b/include/hw/acpi/cxl.h >>>> index acf441888683..8f22c71530d8 100644 >>>> --- a/include/hw/acpi/cxl.h >>>> +++ b/include/hw/acpi/cxl.h >>>> @@ -25,5 +25,6 @@ void cxl_build_cedt(GArray *table_offsets, GArray *table_data, >>>> BIOSLinker *linker, const char *oem_id, >>>> const char *oem_table_id, CXLState *cxl_state); >>>> void build_cxl_osc_method(Aml *dev); >>>> +void build_cxl_dsm_method(Aml *dev); >>>> >>>> #endif >>>> >>>> >>> >
diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c index 2bf8c0799359..cd6839c24416 100644 --- a/hw/acpi/cxl.c +++ b/hw/acpi/cxl.c @@ -30,6 +30,63 @@ #include "qapi/error.h" #include "qemu/uuid.h" +void build_cxl_dsm_method(Aml *dev) +{ + Aml *method, *ifctx, *ifctx2; + + method = aml_method("_DSM", 4, AML_SERIALIZED); + { + Aml *function, *uuid; + + uuid = aml_arg(0); + function = aml_arg(2); + /* CXL spec v3.0 9.17.3.1 *, QTG ID _DSM */ + ifctx = aml_if(aml_equal( + uuid, aml_touuid("F365F9A6-A7DE-4071-A66A-B40C0B4F8E52"))); + + /* Function 0, standard DSM query function */ + ifctx2 = aml_if(aml_equal(function, aml_int(0))); + { + uint8_t byte_list[1] = { 0x01 }; /* functions 1 only */ + + aml_append(ifctx2, + aml_return(aml_buffer(sizeof(byte_list), byte_list))); + } + aml_append(ifctx, ifctx2); + + /* + * Function 1 + * A return value of {1, {0}} inciate that + * max supported QTG ID of 1 and recommended QTG is 0. + * The values here are faked to simplify emulation. + */ + ifctx2 = aml_if(aml_equal(function, aml_int(1))); + { + uint16_t word_list[1] = { 0x01 }; + uint16_t word_list2[1] = { 0 }; + uint8_t *byte_list = (uint8_t *)word_list; + uint8_t *byte_list2 = (uint8_t *)word_list2; + Aml *pak, *pak1; + + /* + * The return package is a package of a WORD and another package. + * The embedded package contains 0 or more WORDs for the + * recommended QTG IDs. + */ + pak1 = aml_package(1); + aml_append(pak1, aml_buffer(sizeof(uint16_t), byte_list2)); + pak = aml_package(2); + aml_append(pak, aml_buffer(sizeof(uint16_t), byte_list)); + aml_append(pak, pak1); + + aml_append(ifctx2, aml_return(pak)); + } + aml_append(ifctx, ifctx2); + } + aml_append(method, ifctx); + aml_append(dev, method); +} + static void cedt_build_chbs(GArray *table_data, PXBDev *cxl) { SysBusDevice *sbd = SYS_BUS_DEVICE(cxl->cxl.cxl_host_bridge); diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 285829802b1a..623f26a16db3 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -1313,6 +1313,7 @@ static void build_acpi0017(Aml *table) method = aml_method("_STA", 0, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_int(0x01))); aml_append(dev, method); + build_cxl_dsm_method(dev); aml_append(scope, dev); aml_append(table, scope); diff --git a/include/hw/acpi/cxl.h b/include/hw/acpi/cxl.h index acf441888683..8f22c71530d8 100644 --- a/include/hw/acpi/cxl.h +++ b/include/hw/acpi/cxl.h @@ -25,5 +25,6 @@ void cxl_build_cedt(GArray *table_offsets, GArray *table_data, BIOSLinker *linker, const char *oem_id, const char *oem_table_id, CXLState *cxl_state); void build_cxl_osc_method(Aml *dev); +void build_cxl_dsm_method(Aml *dev); #endif
Add a simple _DSM call support for the ACPI0017 device to return a fake QTG ID value. Given the current CXL implementation does not involve switches, a faked value of 0 can be returned for the QTG ID. The enabling is for _DSM plumbing testing from the OS. Signed-off-by: Dave Jiang <dave.jiang@intel.com> --- hw/acpi/cxl.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ hw/i386/acpi-build.c | 1 + include/hw/acpi/cxl.h | 1 + 3 files changed, 59 insertions(+)