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authorAndy Lutomirski <luto@kernel.org>2015-04-26 16:47:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-26 17:57:38 -0700
commit61f01dd941ba9e06d2bf05994450ecc3d61b6b8b (patch)
tree3a4a4ef2d5e4d44bb4cb1708f9fc4749e9c9824a /lib/dynamic_queue_limits.c
parent1190944f4b12203330ac5ed8784f6c181bf26f2d (diff)
x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue
AMD CPUs don't reinitialize the SS descriptor on SYSRET, so SYSRET with SS == 0 results in an invalid usermode state in which SS is apparently equal to __USER_DS but causes #SS if used. Work around the issue by setting SS to __KERNEL_DS __switch_to, thus ensuring that SYSRET never happens with SS set to NULL. This was exposed by a recent vDSO cleanup. Fixes: e7d6eefaaa44 x86/vdso32/syscall.S: Do not load __USER32_DS to %ss Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Peter Anvin <hpa@zytor.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <vda.linux@googlemail.com> Cc: Brian Gerst <brgerst@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/dynamic_queue_limits.c')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-09 11:42:13 +0000
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/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2015 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#ifndef EF10_SRIOV_H
#define EF10_SRIOV_H

#include "net_driver.h"

/**
 * struct ef10_vf - PF's store of VF data
 * @efx: efx_nic struct for the current VF
 * @vport_id: vport ID for the VF
 * @vport_assigned: record whether the vport is currently assigned to the VF
 * @mac: MAC address for the VF, zero when address is removed from the vport
 * @vlan: Default VLAN for the VF or #EFX_EF10_NO_VLAN
 */
struct ef10_vf {
	struct efx_nic *efx;
	unsigned int vport_id;
	unsigned int vport_assigned;
	u8 mac[ETH_ALEN];
	u16 vlan;
#define EFX_EF10_NO_VLAN       0
};

static inline bool efx_ef10_sriov_wanted(struct efx_nic *efx)
{
	return false;
}

int efx_ef10_sriov_configure(struct efx_nic *efx, int num_vfs);
int efx_ef10_sriov_init(struct efx_nic *efx);
static inline int efx_ef10_sriov_mac_address_changed(struct efx_nic *efx)
{
	return -EOPNOTSUPP;
}
static inline void efx_ef10_sriov_reset(struct efx_nic *efx) {}
void efx_ef10_sriov_fini(struct efx_nic *efx);
static inline void efx_ef10_sriov_flr(struct efx_nic *efx, unsigned vf_i) {}

int efx_ef10_sriov_set_vf_mac(struct efx_nic *efx, int vf, u8 *mac);

int efx_ef10_sriov_set_vf_vlan(struct efx_nic *efx, int vf_i,
			       u16 vlan, u8 qos);

static inline int efx_ef10_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
						 bool spoofchk)
{
	return -EOPNOTSUPP;
}

int efx_ef10_sriov_get_vf_config(struct efx_nic *efx, int vf_i,
				 struct ifla_vf_info *ivf);

int efx_ef10_vswitching_probe_pf(struct efx_nic *efx);
int efx_ef10_vswitching_probe_vf(struct efx_nic *efx);
int efx_ef10_vswitching_restore_pf(struct efx_nic *efx);
int efx_ef10_vswitching_restore_vf(struct efx_nic *efx);
void efx_ef10_vswitching_remove_pf(struct efx_nic *efx);
void efx_ef10_vswitching_remove_vf(struct efx_nic *efx);

#endif /* EF10_SRIOV_H */