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xen: branch for v6.3-rc3 

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Merge tag 'for-linus-6.3-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - cleanup for xen time handling

 - enable the VGA console in a Xen PVH dom0

 - cleanup in the xenfs driver

* tag 'for-linus-6.3-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: remove unnecessary (void*) conversions
  x86/PVH: obtain VGA console info in Dom0
  x86/xen/time: cleanup xen_tsc_safe_clocksource
  xen: update arch/x86/include/asm/xen/cpuid.h
This commit is contained in:
Linus Torvalds 2023-03-17 10:45:49 -07:00
parent cb80b960ce 7ad2c39860
commit 0eb392ec09
9 changed files with 50 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
arch/x86/include/asm/xen/cpuid.h
View File

@ -89,11 +89,21 @@
* Sub-leaf 2: EAX: host tsc frequency in kHz
*/
#define XEN_CPUID_TSC_EMULATED (1u << 0)
#define XEN_CPUID_HOST_TSC_RELIABLE (1u << 1)
#define XEN_CPUID_RDTSCP_INSTR_AVAIL (1u << 2)
#define XEN_CPUID_TSC_MODE_DEFAULT (0)
#define XEN_CPUID_TSC_MODE_ALWAYS_EMULATE (1u)
#define XEN_CPUID_TSC_MODE_NEVER_EMULATE (2u)
#define XEN_CPUID_TSC_MODE_PVRDTSCP (3u)
/*
* Leaf 5 (0x40000x04)
* HVM-specific features
* Sub-leaf 0: EAX: Features
* Sub-leaf 0: EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag)
* Sub-leaf 0: ECX: domain id (iff EAX has XEN_HVM_CPUID_DOMID_PRESENT flag)
*/
#define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0) /* Virtualized APIC registers */
#define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1) /* Virtualized x2APIC accesses */
@ -102,12 +112,16 @@
#define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3) /* vcpu id is present in EBX */
#define XEN_HVM_CPUID_DOMID_PRESENT (1u << 4) /* domid is present in ECX */
/*
* Bits 55:49 from the IO-APIC RTE and bits 11:5 from the MSI address can be
* used to store high bits for the Destination ID. This expands the Destination
* ID field from 8 to 15 bits, allowing to target APIC IDs up 32768.
* With interrupt format set to 0 (non-remappable) bits 55:49 from the
* IO-APIC RTE and bits 11:5 from the MSI address can be used to store
* high bits for the Destination ID. This expands the Destination ID
* field from 8 to 15 bits, allowing to target APIC IDs up 32768.
*/
#define XEN_HVM_CPUID_EXT_DEST_ID (1u << 5)
/* Per-vCPU event channel upcalls */
/*
* Per-vCPU event channel upcalls work correctly with physical IRQs
* bound to event channels.
*/
#define XEN_HVM_CPUID_UPCALL_VECTOR (1u << 6)
/*

2
arch/x86/xen/Makefile
View File

@ -45,6 +45,6 @@ obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
obj-$(CONFIG_XEN_PV_DOM0) += vga.o
obj-$(CONFIG_XEN_DOM0) += vga.o
obj-$(CONFIG_XEN_EFI) += efi.o

3
arch/x86/xen/enlighten_pv.c
View File

@ -1390,7 +1390,8 @@ asmlinkage __visible void __init xen_start_kernel(struct start_info *si)
x86_platform.set_legacy_features =
xen_dom0_set_legacy_features;
xen_init_vga(info, xen_start_info->console.dom0.info_size);
xen_init_vga(info, xen_start_info->console.dom0.info_size,
&boot_params.screen_info);
xen_start_info->console.domU.mfn = 0;
xen_start_info->console.domU.evtchn = 0;

13
arch/x86/xen/enlighten_pvh.c
View File

@ -43,6 +43,19 @@ void __init xen_pvh_init(struct boot_params *boot_params)
x86_init.oem.banner = xen_banner;
xen_efi_init(boot_params);
if (xen_initial_domain()) {
struct xen_platform_op op = {
.cmd = XENPF_get_dom0_console,
};
long ret = HYPERVISOR_platform_op(&op);
if (ret > 0)
xen_init_vga(&op.u.dom0_console,
min(ret * sizeof(char),
sizeof(op.u.dom0_console)),
&boot_params->screen_info);
}
}
void __init mem_map_via_hcall(struct boot_params *boot_params_p)

7
arch/x86/xen/time.c
View File

@ -20,6 +20,7 @@
#include <asm/pvclock.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/cpuid.h>
#include <xen/events.h>
#include <xen/features.h>
@ -503,11 +504,7 @@ static int __init xen_tsc_safe_clocksource(void)
/* Leaf 4, sub-leaf 0 (0x40000x03) */
cpuid_count(xen_cpuid_base() + 3, 0, &eax, &ebx, &ecx, &edx);
/* tsc_mode = no_emulate (2) */
if (ebx != 2)
return 0;
return 1;
return ebx == XEN_CPUID_TSC_MODE_NEVER_EMULATE;
}
static void __init xen_time_init(void)

5
arch/x86/xen/vga.c
View File

@ -9,10 +9,9 @@
#include "xen-ops.h"
void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size)
void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size,
struct screen_info *screen_info)
{
struct screen_info *screen_info = &boot_params.screen_info;
/* This is drawn from a dump from vgacon:startup in
* standard Linux. */
screen_info->orig_video_mode = 3;

7
arch/x86/xen/xen-ops.h
View File

@ -108,11 +108,12 @@ static inline void xen_uninit_lock_cpu(int cpu)
struct dom0_vga_console_info;
#ifdef CONFIG_XEN_PV_DOM0
void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size);
#ifdef CONFIG_XEN_DOM0
void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size,
struct screen_info *);
#else
static inline void __init xen_init_vga(const struct dom0_vga_console_info *info,
size_t size)
size_t size, struct screen_info *si)
{
}
#endif

10
drivers/xen/xenfs/xensyms.c
View File

@ -64,7 +64,7 @@ static int xensyms_next_sym(struct xensyms *xs)
static void *xensyms_start(struct seq_file *m, loff_t *pos)
{
struct xensyms *xs = (struct xensyms *)m->private;
struct xensyms *xs = m->private;
xs->op.u.symdata.symnum = *pos;
@ -76,7 +76,7 @@ static void *xensyms_start(struct seq_file *m, loff_t *pos)
static void *xensyms_next(struct seq_file *m, void *p, loff_t *pos)
{
struct xensyms *xs = (struct xensyms *)m->private;
struct xensyms *xs = m->private;
xs->op.u.symdata.symnum = ++(*pos);
@ -88,7 +88,7 @@ static void *xensyms_next(struct seq_file *m, void *p, loff_t *pos)
static int xensyms_show(struct seq_file *m, void *p)
{
struct xensyms *xs = (struct xensyms *)m->private;
struct xensyms *xs = m->private;
struct xenpf_symdata *symdata = &xs->op.u.symdata;
seq_printf(m, "%016llx %c %s\n", symdata->address,
@ -120,7 +120,7 @@ static int xensyms_open(struct inode *inode, struct file *file)
return ret;
m = file->private_data;
xs = (struct xensyms *)m->private;
xs = m->private;
xs->namelen = XEN_KSYM_NAME_LEN + 1;
xs->name = kzalloc(xs->namelen, GFP_KERNEL);
@ -138,7 +138,7 @@ static int xensyms_open(struct inode *inode, struct file *file)
static int xensyms_release(struct inode *inode, struct file *file)
{
struct seq_file *m = file->private_data;
struct xensyms *xs = (struct xensyms *)m->private;
struct xensyms *xs = m->private;
kfree(xs->name);
return seq_release_private(inode, file);

3
include/xen/interface/platform.h
View File

@ -483,6 +483,8 @@ struct xenpf_symdata {
};
DEFINE_GUEST_HANDLE_STRUCT(xenpf_symdata);
#define XENPF_get_dom0_console 64
struct xen_platform_op {
uint32_t cmd;
uint32_t interface_version; /* XENPF_INTERFACE_VERSION */
@ -506,6 +508,7 @@ struct xen_platform_op {
struct xenpf_mem_hotadd mem_add;
struct xenpf_core_parking core_parking;
struct xenpf_symdata symdata;
struct dom0_vga_console_info dom0_console;
uint8_t pad[128];
} u;
};