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Message-ID: <4c9761ad30351e5fb763da6e3c21ff2d2ac2ba3a.camel@intel.com>
Date: Wed, 9 Aug 2023 12:01:28 +0000
From: "Zhang, Rui" <rui.zhang@...el.com>
To: "tglx@...utronix.de" <tglx@...utronix.de>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "Gross, Jurgen" <jgross@...e.com>,
"mikelley@...rosoft.com" <mikelley@...rosoft.com>,
"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
"peterz@...radead.org" <peterz@...radead.org>,
"x86@...nel.org" <x86@...nel.org>,
"thomas.lendacky@....com" <thomas.lendacky@....com>,
"wei.liu@...nel.org" <wei.liu@...nel.org>,
"pbonzini@...hat.com" <pbonzini@...hat.com>,
"andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>,
"peter@...esztesschmidt.de" <peter@...esztesschmidt.de>
Subject: Re: [patch V3 45/60] x86/apic: Sanitize APID ID range validation
Hi, Thomas,
in the subject
s/APID/APIC
thanks,
rui
On Tue, 2023-08-01 at 12:47 +0200, Thomas Gleixner wrote:
> Now that everything has apic::max_apic_id set and the eventual update
> for
> the x2APIC case is in place, switch the apic_id_valid() helper to use
> apic::max_apic_id and remove the apic::apic_id_valid() callback.
>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---
> arch/x86/include/asm/apic.h | 3 +--
> arch/x86/kernel/apic/apic_common.c | 5 -----
> arch/x86/kernel/apic/apic_flat_64.c | 2 --
> arch/x86/kernel/apic/apic_noop.c | 2 --
> arch/x86/kernel/apic/apic_numachip.c | 8 --------
> arch/x86/kernel/apic/bigsmp_32.c | 1 -
> arch/x86/kernel/apic/local.h | 1 -
> arch/x86/kernel/apic/probe_32.c | 1 -
> arch/x86/kernel/apic/x2apic_cluster.c | 1 -
> arch/x86/kernel/apic/x2apic_phys.c | 7 -------
> arch/x86/kernel/apic/x2apic_uv_x.c | 6 ------
> arch/x86/xen/apic.c | 6 ------
> 12 files changed, 1 insertion(+), 42 deletions(-)
>
> --- a/arch/x86/include/asm/apic.h
> +++ b/arch/x86/include/asm/apic.h
> @@ -284,7 +284,6 @@ struct apic {
> /* Probe, setup and smpboot functions */
> int (*probe)(void);
> int (*acpi_madt_oem_check)(char *oem_id, char
> *oem_table_id);
> - int (*apic_id_valid)(u32 apicid);
> bool (*apic_id_registered)(void);
>
> bool (*check_apicid_used)(physid_mask_t *map, int apicid);
> @@ -378,7 +377,7 @@ static inline u32 safe_apic_wait_icr_idl
>
> static inline bool apic_id_valid(u32 apic_id)
> {
> - return apic->apic_id_valid(apic_id);
> + return apic_id <= apic->max_apic_id;
> }
>
> extern void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32
> v));
> --- a/arch/x86/kernel/apic/apic_common.c
> +++ b/arch/x86/kernel/apic/apic_common.c
> @@ -37,11 +37,6 @@ int default_cpu_present_to_apicid(int mp
> }
> EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
>
> -int default_apic_id_valid(u32 apicid)
> -{
> - return (apicid < 255);
> -}
> -
> bool default_apic_id_registered(void)
> {
> return physid_isset(read_apic_id(), phys_cpu_present_map);
> --- a/arch/x86/kernel/apic/apic_flat_64.c
> +++ b/arch/x86/kernel/apic/apic_flat_64.c
> @@ -80,7 +80,6 @@ static struct apic apic_flat __ro_after_
> .name = "flat",
> .probe = flat_probe,
> .acpi_madt_oem_check = flat_acpi_madt_oem_check,
> - .apic_id_valid = default_apic_id_valid,
> .apic_id_registered = default_apic_id_registered,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> @@ -158,7 +157,6 @@ static struct apic apic_physflat __ro_af
> .name = "physical flat",
> .probe = physflat_probe,
> .acpi_madt_oem_check =
> physflat_acpi_madt_oem_check,
> - .apic_id_valid = default_apic_id_valid,
> .apic_id_registered = default_apic_id_registered,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> --- a/arch/x86/kernel/apic/apic_noop.c
> +++ b/arch/x86/kernel/apic/apic_noop.c
> @@ -67,8 +67,6 @@ struct apic apic_noop __ro_after_init =
> .probe = noop_probe,
> .acpi_madt_oem_check = NULL,
>
> - .apic_id_valid = default_apic_id_valid,
> -
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = true,
>
> --- a/arch/x86/kernel/apic/apic_numachip.c
> +++ b/arch/x86/kernel/apic/apic_numachip.c
> @@ -56,12 +56,6 @@ static u32 numachip2_set_apic_id(unsigne
> return id << 24;
> }
>
> -static int numachip_apic_id_valid(u32 apicid)
> -{
> - /* Trust what bootloader passes in MADT */
> - return 1;
> -}
> -
> static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
> {
> return initial_apic_id >> index_msb;
> @@ -227,7 +221,6 @@ static const struct apic apic_numachip1
> .name = "NumaConnect system",
> .probe = numachip1_probe,
> .acpi_madt_oem_check =
> numachip1_acpi_madt_oem_check,
> - .apic_id_valid = numachip_apic_id_valid,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = false,
> @@ -267,7 +260,6 @@ static const struct apic apic_numachip2
> .name = "NumaConnect2 system",
> .probe = numachip2_probe,
> .acpi_madt_oem_check =
> numachip2_acpi_madt_oem_check,
> - .apic_id_valid = numachip_apic_id_valid,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = false,
> --- a/arch/x86/kernel/apic/bigsmp_32.c
> +++ b/arch/x86/kernel/apic/bigsmp_32.c
> @@ -79,7 +79,6 @@ static struct apic apic_bigsmp __ro_afte
>
> .name = "bigsmp",
> .probe = probe_bigsmp,
> - .apic_id_valid = default_apic_id_valid,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = false,
> --- a/arch/x86/kernel/apic/local.h
> +++ b/arch/x86/kernel/apic/local.h
> @@ -14,7 +14,6 @@
> #include <asm/apic.h>
>
> /* X2APIC */
> -int x2apic_apic_id_valid(u32 apicid);
> void __x2apic_send_IPI_dest(unsigned int apicid, int vector,
> unsigned int dest);
> unsigned int x2apic_get_apic_id(unsigned long id);
> u32 x2apic_set_apic_id(unsigned int id);
> --- a/arch/x86/kernel/apic/probe_32.c
> +++ b/arch/x86/kernel/apic/probe_32.c
> @@ -33,7 +33,6 @@ static struct apic apic_default __ro_aft
>
> .name = "default",
> .probe = probe_default,
> - .apic_id_valid = default_apic_id_valid,
> .apic_id_registered = default_apic_id_registered,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> --- a/arch/x86/kernel/apic/x2apic_cluster.c
> +++ b/arch/x86/kernel/apic/x2apic_cluster.c
> @@ -226,7 +226,6 @@ static struct apic apic_x2apic_cluster _
> .name = "cluster x2apic",
> .probe = x2apic_cluster_probe,
> .acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
> - .apic_id_valid = x2apic_apic_id_valid,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = true,
> --- a/arch/x86/kernel/apic/x2apic_phys.c
> +++ b/arch/x86/kernel/apic/x2apic_phys.c
> @@ -124,12 +124,6 @@ static int x2apic_phys_probe(void)
> return apic == &apic_x2apic_phys;
> }
>
> -/* Common x2apic functions, also used by x2apic_cluster */
> -int x2apic_apic_id_valid(u32 apicid)
> -{
> - return apicid <= x2apic_max_apicid;
> -}
> -
> unsigned int x2apic_get_apic_id(unsigned long id)
> {
> return id;
> @@ -150,7 +144,6 @@ static struct apic apic_x2apic_phys __ro
> .name = "physical x2apic",
> .probe = x2apic_phys_probe,
> .acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
> - .apic_id_valid = x2apic_apic_id_valid,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = false,
> --- a/arch/x86/kernel/apic/x2apic_uv_x.c
> +++ b/arch/x86/kernel/apic/x2apic_uv_x.c
> @@ -780,11 +780,6 @@ static void uv_send_IPI_all(int vector)
> uv_send_IPI_mask(cpu_online_mask, vector);
> }
>
> -static int uv_apic_id_valid(u32 apicid)
> -{
> - return 1;
> -}
> -
> static u32 set_apic_id(unsigned int id)
> {
> return id;
> @@ -810,7 +805,6 @@ static struct apic apic_x2apic_uv_x __ro
> .name = "UV large system",
> .probe = uv_probe,
> .acpi_madt_oem_check = uv_acpi_madt_oem_check,
> - .apic_id_valid = uv_apic_id_valid,
>
> .delivery_mode = APIC_DELIVERY_MODE_FIXED,
> .dest_mode_logical = false,
> --- a/arch/x86/xen/apic.c
> +++ b/arch/x86/xen/apic.c
> @@ -105,11 +105,6 @@ static int xen_madt_oem_check(char *oem_
> return xen_pv_domain();
> }
>
> -static int xen_id_always_valid(u32 apicid)
> -{
> - return 1;
> -}
> -
> static int xen_phys_pkg_id(int initial_apic_id, int index_msb)
> {
> return initial_apic_id >> index_msb;
> @@ -127,7 +122,6 @@ static struct apic xen_pv_apic = {
> .name = "Xen PV",
> .probe = xen_apic_probe_pv,
> .acpi_madt_oem_check = xen_madt_oem_check,
> - .apic_id_valid = xen_id_always_valid,
>
> /* .delivery_mode and .dest_mode_logical not used by XENPV */
>
>
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