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Tue, 28 Jan 2025 08:34:08 -0800 (PST) From: Alejandro Vallejo To: xen-devel@lists.xenproject.org Cc: Alejandro Vallejo , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Anthony PERARD Subject: [PATCH 2/3] tools/hvmloader: Replace LAPIC_ID() with cpu_to_apicid[] Date: Tue, 28 Jan 2025 16:33:41 +0000 Message-ID: <20250128163342.1491-3-alejandro.vallejo@cloud.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250128163342.1491-1-alejandro.vallejo@cloud.com> References: <20250128163342.1491-1-alejandro.vallejo@cloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @cloud.com) X-ZM-MESSAGEID: 1738082074293019000 Content-Type: text/plain; charset="utf-8" Replace uses of the LAPIC_ID() macro with accesses to the cpu_to_apicid[] lookup table. This table contains the APIC IDs of each vCPU as probed at runtime rather than assuming a predefined relation. Moved smp_initialise() ahead of apic_setup() in order to initialise cpu_to_apicid ASAP and avoid using it uninitialised. Note that bringing up the APs doesn't need the APIC in hvmloader becasue it always runs virtualized and uses the PV interface. Signed-off-by: Alejandro Vallejo --- Changes from v7 of the longer topology series: * Removed ASSERT() for the MP tables and merely skipped writing them if any vCPU has an APIC ID >=3D255. --- tools/firmware/hvmloader/config.h | 3 ++- tools/firmware/hvmloader/hvmloader.c | 6 +++--- tools/firmware/hvmloader/mp_tables.c | 2 +- tools/firmware/hvmloader/util.c | 2 +- 4 files changed, 7 insertions(+), 6 deletions(-) diff --git a/tools/firmware/hvmloader/config.h b/tools/firmware/hvmloader/c= onfig.h index cd716bf39245..6e1da137d779 100644 --- a/tools/firmware/hvmloader/config.h +++ b/tools/firmware/hvmloader/config.h @@ -48,8 +48,9 @@ extern uint8_t ioapic_version; =20 #define IOAPIC_ID 0x01 =20 +extern uint32_t *cpu_to_apicid; + #define LAPIC_BASE_ADDRESS 0xfee00000 -#define LAPIC_ID(vcpu_id) ((vcpu_id) * 2) =20 #define PCI_ISA_DEVFN 0x08 /* dev 1, fn 0 */ #define PCI_ISA_IRQ_MASK 0x0c20U /* ISA IRQs 5,10,11 are PCI connected = */ diff --git a/tools/firmware/hvmloader/hvmloader.c b/tools/firmware/hvmloade= r/hvmloader.c index f8af88fabf24..4e330fc1e241 100644 --- a/tools/firmware/hvmloader/hvmloader.c +++ b/tools/firmware/hvmloader/hvmloader.c @@ -224,7 +224,7 @@ static void apic_setup(void) =20 /* 8259A ExtInts are delivered through IOAPIC pin 0 (Virtual Wire Mode= ). */ ioapic_write(0x10, APIC_DM_EXTINT); - ioapic_write(0x11, SET_APIC_ID(LAPIC_ID(0))); + ioapic_write(0x11, SET_APIC_ID(cpu_to_apicid[0])); } =20 struct bios_info { @@ -341,11 +341,11 @@ int main(void) =20 printf("CPU speed is %u MHz\n", get_cpu_mhz()); =20 + smp_initialise(); + apic_setup(); pci_setup(); =20 - smp_initialise(); - perform_tests(); =20 if ( bios->bios_info_setup ) diff --git a/tools/firmware/hvmloader/mp_tables.c b/tools/firmware/hvmloade= r/mp_tables.c index 77d3010406d0..3c93a5c947d9 100644 --- a/tools/firmware/hvmloader/mp_tables.c +++ b/tools/firmware/hvmloader/mp_tables.c @@ -199,7 +199,7 @@ static void fill_mp_config_table(struct mp_config_table= *mpct, int length) static void fill_mp_proc_entry(struct mp_proc_entry *mppe, int vcpu_id) { mppe->type =3D ENTRY_TYPE_PROCESSOR; - mppe->lapic_id =3D LAPIC_ID(vcpu_id); + mppe->lapic_id =3D cpu_to_apicid[vcpu_id]; mppe->lapic_version =3D 0x11; mppe->cpu_flags =3D CPU_FLAG_ENABLED; if ( vcpu_id =3D=3D 0 ) diff --git a/tools/firmware/hvmloader/util.c b/tools/firmware/hvmloader/uti= l.c index d3b3f9038e64..2d07ce129013 100644 --- a/tools/firmware/hvmloader/util.c +++ b/tools/firmware/hvmloader/util.c @@ -827,7 +827,7 @@ static void acpi_mem_free(struct acpi_ctxt *ctxt, =20 static uint32_t acpi_lapic_id(unsigned cpu) { - return LAPIC_ID(cpu); + return cpu_to_apicid[cpu]; } =20 void hvmloader_acpi_build_tables(struct acpi_config *config, --=20 2.48.1