From: Wei Liu <wei.liu@kernel.org>
To: Linux on Hyper-V List <linux-hyperv@vger.kernel.org>
Cc: virtualization@lists.linux-foundation.org,
Linux Kernel List <linux-kernel@vger.kernel.org>,
Michael Kelley <mikelley@microsoft.com>,
Vineeth Pillai <viremana@linux.microsoft.com>,
Sunil Muthuswamy <sunilmut@microsoft.com>,
Nuno Das Neves <nudasnev@microsoft.com>,
Wei Liu <wei.liu@kernel.org>,
Lillian Grassin-Drake <ligrassi@microsoft.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
"H. Peter Anvin" <hpa@zytor.com>, Arnd Bergmann <arnd@arndb.de>,
linux-arch@vger.kernel.org (open list:GENERIC INCLUDE/ASM HEADER
FILES)
Subject: [PATCH RFC v1 07/18] x86/hyperv: extract partition ID from Microsoft Hypervisor if necessary
Date: Mon, 14 Sep 2020 11:27:51 +0000 [thread overview]
Message-ID: <20200914112802.80611-8-wei.liu@kernel.org> (raw)
In-Reply-To: <20200914112802.80611-1-wei.liu@kernel.org>
We will need the partition ID for executing some hypercalls later.
Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
---
arch/x86/hyperv/hv_init.c | 26 ++++++++++++++++++++++++++
arch/x86/include/asm/mshyperv.h | 2 ++
include/asm-generic/hyperv-tlfs.h | 6 ++++++
3 files changed, 34 insertions(+)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index ebba4be4185d..0eec1ed32023 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -30,6 +30,9 @@
bool hv_root_partition;
EXPORT_SYMBOL_GPL(hv_root_partition);
+u64 hv_current_partition_id;
+EXPORT_SYMBOL_GPL(hv_current_partition_id);
+
void *hv_hypercall_pg;
EXPORT_SYMBOL_GPL(hv_hypercall_pg);
@@ -345,6 +348,26 @@ static struct syscore_ops hv_syscore_ops = {
.resume = hv_resume,
};
+void __init hv_get_partition_id(void)
+{
+ struct hv_get_partition_id *output_page;
+ int status;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ output_page = *this_cpu_ptr(hyperv_pcpu_output_arg);
+ status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, output_page) &
+ HV_HYPERCALL_RESULT_MASK;
+ if (status != HV_STATUS_SUCCESS)
+ pr_err("Failed to get partition ID: %d\n", status);
+ else
+ hv_current_partition_id = output_page->partition_id;
+ local_irq_restore(flags);
+
+ /* No point in proceeding if this failed */
+ BUG_ON(status != HV_STATUS_SUCCESS);
+}
+
/*
* This function is to be invoked early in the boot sequence after the
* hypervisor has been detected.
@@ -440,6 +463,9 @@ void __init hyperv_init(void)
register_syscore_ops(&hv_syscore_ops);
+ if (hv_root_partition)
+ hv_get_partition_id();
+
return;
remove_cpuhp_state:
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index f5c62140f28d..4039302e0ae9 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -65,6 +65,8 @@ extern void *hv_hypercall_pg;
extern void __percpu **hyperv_pcpu_input_arg;
extern void __percpu **hyperv_pcpu_output_arg;
+extern u64 hv_current_partition_id;
+
static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
{
u64 input_address = input ? virt_to_phys(input) : 0;
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index e6903589a82a..87b1a79b19eb 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -141,6 +141,7 @@ struct ms_hyperv_tsc_page {
#define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX 0x0013
#define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX 0x0014
#define HVCALL_SEND_IPI_EX 0x0015
+#define HVCALL_GET_PARTITION_ID 0x0046
#define HVCALL_GET_VP_REGISTERS 0x0050
#define HVCALL_SET_VP_REGISTERS 0x0051
#define HVCALL_POST_MESSAGE 0x005c
@@ -407,6 +408,11 @@ struct hv_tlb_flush_ex {
u64 gva_list[];
} __packed;
+/* HvGetPartitionId hypercall (output only) */
+struct hv_get_partition_id {
+ u64 partition_id;
+} __packed;
+
/* HvRetargetDeviceInterrupt hypercall */
union hv_msi_entry {
u64 as_uint64;
--
2.20.1
next prev parent reply other threads:[~2020-09-14 11:39 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-14 11:27 [PATCH RFC v1 00/18] Introducing Linux root partition support for Microsoft Hypervisor Wei Liu
2020-09-14 11:27 ` [PATCH RFC v1 01/18] asm-generic/hyperv: change HV_CPU_POWER_MANAGEMENT to HV_CPU_MANAGEMENT Wei Liu
2020-09-14 11:27 ` [PATCH RFC v1 02/18] x86/hyperv: detect if Linux is the root partition Wei Liu
2020-09-14 11:27 ` [PATCH RFC v1 03/18] Drivers: hv: vmbus: skip VMBus initialization if Linux is root Wei Liu
2020-09-14 11:27 ` [PATCH RFC v1 04/18] iommu/hyperv: don't setup IRQ remapping when running as root Wei Liu
2020-09-18 9:12 ` Joerg Roedel
2020-09-14 11:27 ` [PATCH RFC v1 05/18] clocksource/hyperv: use MSR-based access if " Wei Liu
2020-09-15 10:10 ` Vitaly Kuznetsov
2020-09-15 10:32 ` Wei Liu
2020-09-14 11:27 ` [PATCH RFC v1 06/18] x86/hyperv: allocate output arg pages if required Wei Liu
2020-09-15 10:16 ` Vitaly Kuznetsov
2020-09-15 12:43 ` Wei Liu
2020-09-16 15:42 ` Wei Liu
2020-09-16 16:10 ` Vitaly Kuznetsov
2020-09-14 11:27 ` Wei Liu [this message]
2020-09-15 10:27 ` [PATCH RFC v1 07/18] x86/hyperv: extract partition ID from Microsoft Hypervisor if necessary Vitaly Kuznetsov
2020-09-16 16:32 ` Wei Liu
2020-10-27 12:19 ` Wei Liu
2020-09-14 11:27 ` [PATCH RFC v1 08/18] x86/hyperv: handling hypercall page setup for root Wei Liu
2020-09-15 10:32 ` Vitaly Kuznetsov
2020-09-15 10:37 ` Wei Liu
2020-09-15 11:02 ` Vitaly Kuznetsov
2020-09-15 11:16 ` Wei Liu
2020-09-15 11:23 ` Vitaly Kuznetsov
2020-09-15 11:27 ` Wei Liu
2020-09-16 21:34 ` [EXTERNAL] " Sunil Muthuswamy
2020-09-17 11:06 ` Vitaly Kuznetsov
2020-09-14 11:59 ` [PATCH RFC v1 09/18] x86/hyperv: provide a bunch of helper functions Wei Liu
2020-09-15 11:00 ` Vitaly Kuznetsov
2020-10-27 13:10 ` Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 10/18] x86/hyperv: implement and use hv_smp_prepare_cpus Wei Liu
2020-09-15 11:14 ` Vitaly Kuznetsov
2020-10-27 13:47 ` Wei Liu
2020-10-27 13:56 ` Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 11/18] asm-generic/hyperv: update hv_msi_entry Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 12/18] asm-generic/hyperv: update hv_interrupt_entry Wei Liu
2020-10-01 14:33 ` Rob Herring
2020-09-14 11:59 ` [PATCH RFC v1 13/18] asm-generic/hyperv: introduce hv_device_id and auxiliary structures Wei Liu
2020-09-15 11:16 ` Vitaly Kuznetsov
2020-09-15 11:59 ` Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 14/18] asm-generic/hyperv: import data structures for mapping device interrupts Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 15/18] x86/apic/msi: export pci_msi_get_hwirq Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 16/18] x86/hyperv: implement MSI domain for root partition Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 17/18] x86/ioapic: export a few functions and data structures via io_apic.h Wei Liu
2020-09-14 11:59 ` [PATCH RFC v1 18/18] x86/hyperv: handle IO-APIC when running as root Wei Liu
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