search for: shared_buffer

...__user *)-1L) + return ES_UNSUPPORTED; + + exit_code = read ? SVM_VMGEXIT_MMIO_READ : SVM_VMGEXIT_MMIO_WRITE; + + exit_info_1 = vc_slow_virt_to_phys(ghcb, (unsigned long)ref); + exit_info_2 = bytes; /* Can never be greater than 8 */ + + ghcb->save.sw_scratch = ghcb_pa + offsetof(struct ghcb, shared_buffer); + + return sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, exit_info_1, exit_info_2); +} + +static enum es_result vc_handle_mmio_twobyte_ops(struct ghcb *ghcb, + struct es_em_ctxt *ctxt) +{ + struct insn *insn = &ctxt->insn; + unsigned int bytes = 0; + enum es_result ret; + int sign_byte;...

...low_virt_to_phys(ghcb, ctxt, (unsigned long)ref, &paddr)) { + if (!read) + ctxt->fi.error_code |= X86_PF_WRITE; + + return ES_EXCEPTION; + } + + exit_info_1 = paddr; + exit_info_2 = bytes; /* Can never be greater than 8 */ + + ghcb->save.sw_scratch = ghcb_pa + offsetof(struct ghcb, shared_buffer); + + return sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, exit_info_1, exit_info_2); +} + +static enum es_result vc_handle_mmio_twobyte_ops(struct ghcb *ghcb, + struct es_em_ctxt *ctxt) +{ + struct insn *insn = &ctxt->insn; + unsigned int bytes = 0; + enum es_result ret; + int sign_byte;...

...xception is limited so that the kernel > + * has a chance to take interrupts an re-schedule while the > + * instruction is emulated. Doesn't this also suppress single-step #DBs? > + */ > + io_bytes = (exit_info_1 >> 4) & 0x7; > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > + > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > + exit_info_2 = min(op_count, ghcb_count); > + exit_bytes = exit_info_2 * io_bytes; > + > + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES); > + > + if (!(exit_info_1 &...

...xception is limited so that the kernel > + * has a chance to take interrupts an re-schedule while the > + * instruction is emulated. Doesn't this also suppress single-step #DBs? > + */ > + io_bytes = (exit_info_1 >> 4) & 0x7; > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > + > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > + exit_info_2 = min(op_count, ghcb_count); > + exit_bytes = exit_info_2 * io_bytes; > + > + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES); > + > + if (!(exit_info_1 &...

...ing variants with rep prefix the amount of in/out + * operations per #VC exception is limited so that the kernel + * has a chance to take interrupts an re-schedule while the + * instruction is emulated. + */ + io_bytes = (exit_info_1 >> 4) & 0x7; + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; + + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; + exit_info_2 = min(op_count, ghcb_count); + exit_bytes = exit_info_2 * io_bytes; + + if (!(exit_info_1 & IOIO_TYPE_IN)) { + ret = insn_string_read(ctxt, (void *)regs->si, + ghcb->shared_buffe...

Hello again, on CentOS 6 / 64 bit what is please the best way to permanently increase the shared memory? I'd like to give shared_buffers = 4096MB to PostgreSQL 8.4 on my machine with 16 GB RAM, but I currently only have: # sysctl -A|grep shm kernel.shmmax = 33554432 kernel.shmall = 2097152 kernel.shmmni = 4096 and this produces the error in /var/lib/pgsql/pgstartup.log: FATAL: could not create shared memory segment...

...ing variants with rep prefix the amount of in/out + * operations per #VC exception is limited so that the kernel + * has a chance to take interrupts an re-schedule while the + * instruction is emulated. + */ + io_bytes = (exit_info_1 >> 4) & 0x7; + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; + + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; + exit_info_2 = min(op_count, ghcb_count); + exit_bytes = exit_info_2 * io_bytes; + + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES); + + if (!(exit_info_1 & IOIO_TYPE_IN)) { + ret = vc_insn_stri...

This series is mainly for testing live migration between 2 vdpa_sim_blk devices. The first patch is preparation and moves the buffer allocation into devices, the second patch adds the `shared_buffer_mutex` parameter to vdpa_sim_blk to use the same ramdisk for all devices. Tested with QEMU v8.0.0-rc2 in this way: modprobe vhost_vdpa modprobe vdpa_sim_blk shared_backend=true vdpa dev add mgmtdev vdpasim_blk name blk0 vdpa dev add mgmtdev vdpasim_blk name blk1 qemu-system-x86_64 -m 512M -smp...

...l wrote: > + if (exit_info_1 & IOIO_TYPE_STR) { > + int df = (regs->flags & X86_EFLAGS_DF) ? -1 : 1; ... > + > + if (!(exit_info_1 & IOIO_TYPE_IN)) { > + ret = vc_insn_string_read(ctxt, > + (void *)(es_base + regs->si), > + ghcb->shared_buffer, io_bytes, > + exit_info_2, df); ^^^^ > + > + /* Everything went well, write back results */ > + if (exit_info_1 & IOIO_TYPE_IN) { > + ret = vc_insn_string_write(ctxt, > + (void *)(es_base + regs->di), > + ghcb->shared_buffer, io_by...

...has a chance to take interrupts an re-schedule while the > > + * instruction is emulated. > > Doesn't this also suppress single-step #DBs? Yes it does. > > > + */ > > + io_bytes = (exit_info_1 >> 4) & 0x7; > > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > > + > > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > > + exit_info_2 = min(op_count, ghcb_count); > > + exit_bytes = exit_info_2 * io_bytes; > > + > > + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES); > &gt...

On Mon, Aug 21, 2023 at 10:18?AM Shawn.Shao <shawn.shao at jaguarmicro.com> wrote: > > If the shared_buffer allocation fails, need to unregister mgmt_dev first. > Please add a Fixes tag. Other than this Acked-by: Jason Wang <jasowang at redhat.com> Thanks > Signed-off-by: Shawn.Shao <shawn.shao at jaguarmicro.com> > --- > drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 5 +++-- >...

...stgres8/pg_multixact/offsets ... ok creating directory /opt/local/var/db/pgsql8/postgres8/base ... ok creating directory /opt/local/var/db/pgsql8/postgres8/base/1 ... ok creating directory /opt/local/var/db/pgsql8/postgres8/pg_tblspc ... ok selecting default max_connections ... 10 selecting default shared_buffers ... 50 creating configuration files ... ok creating template1 database in /opt/local/var/db/pgsql8/postgres8/base/1 ... FATAL: could not create shared memory segment: Cannot allocate memory DETAIL: Failed system call was shmget(key=1, size=1318912, 03600). HINT: This error usually means that P...

...# comma-separated list of addresses; # defaults to 'localhost', '*' = all port = 5432 max_connections = 100 # note: increasing max_connections costs ~400 bytes of shared memory per # connection slot, plus lock space (see max_locks_per_transaction). You # might also need to raise shared_buffers to support more connections. #superuser_reserved_connections = 2 #unix_socket_directory = '' #unix_socket_group = '' #unix_socket_permissions = 0777 # octal #bonjour_name = '' # defaults to the computer asterisk is not able to make TCP/Ip connection. plz guide me where i...

On Wed, Jun 03, 2020 at 04:23:25PM +0200, Joerg Roedel wrote: > > > + */ > > > + io_bytes = (exit_info_1 >> 4) & 0x7; > > > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > > > + > > > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > > > + exit_info_2 = min(op_count, ghcb_count); > > > + exit_bytes = exit_info_2 * io_bytes; > > > + > > > + es_base = insn_get_seg_base(ctxt->re...

On Wed, Jun 03, 2020 at 04:23:25PM +0200, Joerg Roedel wrote: > > > + */ > > > + io_bytes = (exit_info_1 >> 4) & 0x7; > > > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > > > + > > > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > > > + exit_info_2 = min(op_count, ghcb_count); > > > + exit_bytes = exit_info_2 * io_bytes; > > > + > > > + es_base = insn_get_seg_base(ctxt->re...

On 17/02/16 14:32, Michael H wrote: > Hi, re-posting this with a more appropriate subject for my reply; > >> The easy answer is yes .. glibc requires so many things to be restarted, >> that is the best bet. Or certainly the easiest. >> >> Note: in CentOS 7, there is also a kernel update which is rated as >> Important .. so you should boot to that anyway:

I''m getting more and more "execution expired" as systems checking and hit puppetdb for the first time (switching from a mysql instance). The command queue isn''t long (1-5, if anything, all the time), and ym master itself seems to be dealing well enough. I have seen the collection time growing higher and higher though. This is a ~2K node deployment, and one of the few

...4 r15; + u8 reserved_10[16]; + u64 sw_exit_code; + u64 sw_exit_info_1; + u64 sw_exit_info_2; + u64 sw_scratch; + u8 reserved_11[56]; + u64 xcr0; + u8 valid_bitmap[16]; + u64 x87_state_gpa; + u8 reserved_12[1016]; +}; + +struct __attribute__ ((__packed__)) ghcb { + struct vmcb_save_area save; + + u8 shared_buffer[2032]; + + u8 reserved_1[10]; + u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */ + u32 ghcb_usage; }; struct __attribute__ ((__packed__)) vmcb { -- 2.17.1

...4 r15; + u8 reserved_10[16]; + u64 sw_exit_code; + u64 sw_exit_info_1; + u64 sw_exit_info_2; + u64 sw_scratch; + u8 reserved_11[56]; + u64 xcr0; + u8 valid_bitmap[16]; + u64 x87_state_gpa; + u8 reserved_12[1016]; +}; + +struct __attribute__ ((__packed__)) ghcb { + struct vmcb_save_area save; + + u8 shared_buffer[2032]; + + u8 reserved_1[10]; + u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */ + u32 ghcb_usage; }; struct __attribute__ ((__packed__)) vmcb { -- 2.17.1

...struct vmcb_seg cs; struct vmcb_seg ss; @@ -233,9 +233,9 @@ struct __attribute__ ((__packed__)) vmcb_save_area { u8 valid_bitmap[16]; u64 x87_state_gpa; u8 reserved_12[1016]; -}; +} __packed; -struct __attribute__ ((__packed__)) ghcb { +struct ghcb { struct vmcb_save_area save; u8 shared_buffer[2032]; @@ -243,12 +243,12 @@ struct __attribute__ ((__packed__)) ghcb { u8 reserved_1[10]; u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */ u32 ghcb_usage; -}; +} __packed; -struct __attribute__ ((__packed__)) vmcb { +struct vmcb { struct vmcb_control_area control; st...