search for: set_fixmap_nocach

...;mp_register_ioapic+194>: movb   $0x1,-0x3e2cb1b9(%edi) 2: gsi_base = 0 3: *(int *)0xc1b2fe34 = 0 (gdb)  416 ioapics[idx].mp_config.apicaddr = address; 1: x/i $pc => 0xc1046a79 <mp_register_ioapic+201>: mov    %esi,-0x3e2cb1b8(%edi) 2: gsi_base = 0 3: *(int *)0xc1b2fe34 = 0 (gdb)  418 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); 1: x/i $pc => 0xc1046a7f <mp_register_ioapic+207>: lea    0x5(%ebx),%eax 2: gsi_base = 0 3: *(int *)0xc1b2fe34 = 0 (gdb)  cachemode2protval (pcm=_PAGE_CACHE_MODE_UC) at ./arch/x86/include/asm/pgtable_types.h:439 439 return __cachemode2pte_tbl[pcm]; 1:...

On Fri, 2018-02-09 at 10:36 +0000, David Woodhouse wrote: > > Did you get anywhere with the function attribute? Having isolated the > next boot failure to "it goes away if I compile io_apic.c without > retpoline", bisecting it per-function would help to further delay the > bit where I actually have to start *thinking*... It's mp_register_ioapic(), and only when

..._base = 0 > 3: *(int *)0xc1b2fe34 = 0 > (gdb) > 416 ioapics[idx].mp_config.apicaddr = address; > 1: x/i $pc > => 0xc1046a79 <mp_register_ioapic+201>: mov %esi,-0x3e2cb1b8(%edi) > 2: gsi_base = 0 > 3: *(int *)0xc1b2fe34 = 0 > (gdb) > 418 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); > 1: x/i $pc > => 0xc1046a7f <mp_register_ioapic+207>: lea 0x5(%ebx),%eax > 2: gsi_base = 0 > 3: *(int *)0xc1b2fe34 = 0 > (gdb) > cachemode2protval (pcm=_PAGE_CACHE_MODE_UC) at ./arch/x86/include/asm/ > pgtable_types.h:439 > 4...

...ff -r ab0c1bdede53 xen/arch/x86/hpet.c --- a/xen/arch/x86/hpet.c Wed Nov 26 11:14:26 2008 +0000 +++ b/xen/arch/x86/hpet.c Wed Nov 26 19:22:03 2008 -0500 @@ -273,6 +273,8 @@ return hpet_rate; system_reset_latch = system_reset_counter; + if ( !hpet_address ) + return 0; set_fixmap_nocache(FIX_HPET_BASE, hpet_address); hpet_id = hpet_read32(HPET_ID); _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...t; #include "../vtd.h" --- a/xen/drivers/passthrough/vtd/quirks.c +++ b/xen/drivers/passthrough/vtd/quirks.c @@ -119,8 +119,12 @@ static void map_igd_reg(void) igd_reg = (igd_mmio & IGD_BAR_MASK) + 0x2000; /* ioremap this physical page */ +#if defined(CONFIG_X86) set_fixmap_nocache(FIX_IGD_MMIO, igd_reg); igd_reg_va = (u8 *)fix_to_virt(FIX_IGD_MMIO); +#else + igd_reg_va = ioremap_nocache(igd_reg, 0x100); +#endif } /* --- a/xen/include/asm-ia64/hvm/vacpi.h +++ b/xen/include/asm-ia64/hvm/vacpi.h @@ -24,10 +24,6 @@ #include <public/arch-ia64/hvm/save.h> /* fo...

..., as seen in the following code from mmconfig.c . static inline void pci_exp_set_dev_base(int bus, int devfn) { u32 dev_base = pci_mmcfg_base_addr | (bus << 20) | (devfn << 12); if (dev_base != mmcfg_last_accessed_device) { mmcfg_last_accessed_device = dev_base; set_fixmap_nocache(FIX_PCIE_MCFG, dev_base); } } static int pci_mmcfg_read(unsigned int seg, unsigned int bus, unsigned int devfn, int reg, int len, u32 *value) { unsigned long flags; if (!value || (bus > 255) || (devfn > 255) || (reg > 4095)) return -EINVAL; spin_lo...

...ct ns16550 *uart) @@ -265,7 +271,17 @@ static void __init ns16550_init_preirq(s /* I/O ports are distinguished by their size (16 bits). */ if ( uart->io_base >= 0x10000 ) + { +#ifdef CONFIG_X86 + enum fixed_addresses idx = FIX_COM_BEGIN + (uart - ns16550_com); + + set_fixmap_nocache(idx, uart->io_base); + uart->remapped_io_base = (void __iomem *)fix_to_virt(idx); + uart->remapped_io_base += uart->io_base & ~PAGE_MASK; +#else uart->remapped_io_base = (char *)ioremap(uart->io_base, 8); +#endif + } ns16550_setup_preirq(uart)...

...> mmconfig.c . > > static inline void pci_exp_set_dev_base(int bus, int devfn) { > u32 dev_base = pci_mmcfg_base_addr | (bus << 20) | (devfn << 12); > if (dev_base != mmcfg_last_accessed_device) { > mmcfg_last_accessed_device = dev_base; > set_fixmap_nocache(FIX_PCIE_MCFG, dev_base); > } > } > > static int pci_mmcfg_read(unsigned int seg, unsigned int bus, > unsigned int devfn, int reg, int len, u32 *value) { > unsigned long flags; > > if (!value || (bus > 255) || (devfn > 255) || (reg > 409...

Jan, I was given a machine to diagnose a boot problem on xen 4.3, that used to work on 4.2, and have bisected to the following changeset: commit d0d4635d034f202bb401a6efa3ba61530f3854ab Author: Jan Beulich <jbeulich@suse.com> Date: Thu Nov 22 10:47:58 2012 +0100 implement vmap() ... and use it as basis for a proper ioremap() on x86. Signed-off-by: Jan Beulich

...E_MASK) + - (paddr & PAGE_MASK)) >> PAGE_SHIFT) + 1; + if (apei_range_nr + pg > FIX_APEI_RANGE_MAX) + return NULL; + + start_nr = apei_range_nr + pg -1; + for (i = 0; i < pg; i++) { + cur_nr = start_nr - i; + set_fixmap_nocache(FIX_APEI_RANGE_BASE + cur_nr, + paddr + (i << PAGE_SHIFT)); + apei_range_nr++; + } + + return (void __iomem *)fix_to_virt(FIX_APEI_RANGE_BASE + start_nr); +} + +/* + * Used to pre-map the specified IO memory area. First try to f...

Hi Ingo, Here''s the chunk of patches to add Xen Dom0 support (it''s probably worth creating a new xen/dom0 topic branch for it). A dom0 Xen domain is basically the same as a normal domU domain, but it has extra privileges to directly access hardware. There are two issues to deal with: - translating to and from the domain''s pseudo-physical addresses and real machine